Question 1

Is Polyether L-63 harmful to the human body? Does it have an impact on the environment?

Accepted Answer

Polyether L-63 is an actually non-toxic and non-hazardous substance. It is basically safe for human health and has minimal impact on the ecological environment, with easy biodegradability. Impact on Human Health According to the Safety Data Sheet (SDS) of Guoli Chemical, Polyether L-63 is classified as a non-hazardous substance under the GHS classification system, with no hazard category, no pictogram, and no signal word. Toxicological data indicates that its acute oral toxicity LD50 (rat) is greater than 5000 mg/kg, belonging to the actually non-toxic level. It is non-irritating to the skin (based on OECD 404 rabbit test) and non-sensitizing via respiratory or skin contact. Special attention is needed: this product may cause mild temporary eye irritation (based on OECD 405 test). In case of accidental eye contact during operation, immediately rinse with plenty of water for several minutes. If irritation persists, seek medical attention promptly. Under normal industrial operating conditions, using this product according to basic industrial hygiene practices is safe. It is recommended to wear chemical protective gloves (e.g., nitrile or neoprene gloves), chemical safety goggles or ce shield, and work in a well-ventilated area. Impact on the Environment The environmental impact of Polyether L-63 is generally low. Acute aquatic toxicity tests show that the LL50 (for fish, algae, or daphnia) is greater than 100 mg/L, placing it in the low toxicity category for aquatic organisms. Regarding biodegradability, based on the OECD 301F method, the degradation rate is greater than 60% ThOD, indicating that it is readily biodegradable and will not persist in the natural environment. Additionally, this product has no significant bioaccumulation potential and is not classified as having persistent, bioaccumulative, or toxic (PBT) properties or very persistent, very bioaccumulative (vPvB) risks. Although the environmental risk is low, care should still be taken to prevent direct discharge of untreated product into drains, waterways, or soil. In case of spillage, use inert absorbent materials (such as sand, vermiculite) to collect and dispose of in accordance with local regulations at licensed waste treatment cilities. Summary of Toxicological and Ecotoxicological Data Evaluation ItemTest Method/StandardResultConclusion Acute Oral ToxicityLD50 (Rat)>5000 mg/kgActually non-toxic Skin Corrosion/IrritationOECD 404 (Rabbit)Non-irritatingSafe Eye Damage/IrritationOECD 405Mild temporary irritationRequires protection Skin/Respiratory Sensitization—Non-sensitizingSafe Acute Aquatic ToxicityLL50 (Fish/Algae/Daphnia)>100 mg/LLow toxicity BiodegradabilityOECD 301FDegradation rate >60% ThODReadily biodegradable Bioaccumulation—No significant accumulation potentialLow risk PBT/vPvB Assessment—NoneLow risk Precautions Eye protection is the primary concern: The main safety risk of Polyether L-63 is mild temporary eye irritation. Chemical safety goggles or ce shield must be worn during operation. In case of eye contact, strictly follow the P305+P351+P338 principle: immediately rinse with plenty of water carefully for several minutes; if wearing contact lenses and easy to remove, remove them during rinsing. If irritation persists, seek medical attention (P337+P313). No direct discharge allowed: Although this product is readily biodegradable and has low aquatic toxicity, untreated waste must not be discharged into soil, waterways, or public sewage systems. Dispose of in licensed waste treatment cilities in accordance with national and local regulations. Storage conditions: Recommended storage temperature 5–40°C, keep container tightly closed, away from strong oxidizers, strong acids, and other incompatible materials. Non-flammable but caution needed: Closed-cup flash point >200°C, classified as a non-flammable liquid. However, thermal decomposition at high temperatures may produce harmful gases. Firefighters should wear self-contained breathing apparatus when extinguishing fires.

Question 2

What should I do if problems occur during the use of Polyether L-63? How to obtain technical support?

Accepted Answer

If problems occur during the use of Polyether L-63, it is recommended to follow the process of "check first → respond urgently → then seek help," and obtain professional technical support through official channels of Guoli Chemical. Detailed Explanation Polyether L-63, as a nonionic polyether polyol, may encounter issues during use involving process anomalies (e.g., uneven foam structure, substandard resilience), abnormal product conditions (e.g., viscosity change, color deepening, stratification), and safety contact incidents (e.g., eye splashes, skin contact). First, determine the nature of the problem, then address it accordingly. For process-related issues, it is recommended to first verify the following key points: ① Whether the addition ratio of Polyether L-63 in the formulation is within the recommended range; ② Whether material storage is compliant (whether freezing or prolonged high-temperature exposure has occurred; recommended storage temperature is 5–40°C); ③ Whether the ratio and mixing process with other components such as isocyanates are normal; ④ Whether foaming process parameters (temperature, stirring speed, mold temperature, etc.) deviate from the process window. It is advisable to maintain batch records for traceability and analysis. For safety emergencies, immediately refer to the first-aid measures in the product SDS: Eye contact is the primary potential risk; rinse immediately with plenty of water for several minutes (remove contact lenses if worn), and seek medical attention if irritation persists; for skin contact, remove contaminated clothing and wash thoroughly with water and soap; if inhalation causes discomfort, move to fresh air. For non-urgent technical issues, contact the technical team of Guoli Chemical for professional diagnosis. Ways to Obtain Technical Support Hai'an County Guoli Chemical Co., Ltd. provides users with multi-channel technical support services: Pre-sales/After-sales Technical Consultation: Contact the sales or technical department of Guoli Chemical, providing the product batch number, description of the usage process, and a description of the issue (photos or videos are recommended). Technical engineers will analyze and diagnose the problem and provide solutions. Product Data Access: The Safety Data Sheet (SDS) contains complete information on safe handling, storage, emergency measures, toxicology/ecology, etc., serving as a primary reference. Sample Retesting: If quality problems with the product itself are suspected, request retesting of retained samples or new batches to confirm whether key indicators such as hydroxyl value, viscosity, and color are within specifications. On-site Technical Support: For major process issues or new product development, coordinate with Guoli Chemical technical engineers to provide on-site process guidance and problem diagnosis. Customized Solutions: For special application scenarios (e.g., high-resilience foam with specific hardness requirements, adhesive formulations for special substrates), offer formulation optimization suggestions. Application Suggestions To reduce the likelihood of problems during use, it is recommended that users pay attention to the following points when using Polyether L-63: Upon receipt, first inspect the appearance (should be a colorless to slightly yellow transparent viscous liquid), and confirm that the product is within the shelf life and storage conditions are compliant. After each material withdrawal, immediately seal the container to prevent moisture absorption or contamination, as polyether polyols have certain hygroscopic properties. Before a new batch goes online, it is recommended to conduct small-scale tests to verify compatibility with the existing formulation system and process adaptability. Establish complete batch usage records to quickly trace back to specific batches and operational steps in case of problems. Precautions Although Polyether L-63 is a non-hazardous substance (acute oral LD50 > 5000 mg/kg, non-irritating to skin, non-flammable liquid), basic industrial hygiene practices should still be followed: Wear chemical protective gloves and safety goggles during operation, use in well-ventilated areas, and avoid contact with eyes. In case of spillage, collect with inert absorbent materials (e.g., sand, vermiculite) and dispose of in accordance with local regulations, preventing entry into drainage systems or water bodies. This product is readily biodegradable (OECD 301F method, degradation rate > 60% ThOD) and has low toxicity to aquatic organisms. To obtain the latest contact information, technical data, or submit technical inquiries for Guoli Chemical, please visit the official website of Hai'an County Guoli Chemical Co., Ltd. or directly call the company's sales/technical department. Be prepared to provide product name, batch number, usage process, and problem description to enable the technical team to respond quickly.

Question 3

How to purchase Polyether L-63? What is the minimum order quantity?

Accepted Answer

To purchase Polyether L-63, please contact the Guoli Chemical sales team for quotations and the latest policies. The minimum order quantity is subject to business confirmation. Detailed Description Polyether L-63 (CAS No.: 9003-11-6) is a nonionic polyether polyol produced by Haian Guoli Chemical Co., Ltd. As a core chemical raw material, it is widely used in polyurethane high-resilience flexible foams, self-skinning foams, semi-rigid foams, microcellular elastomers, and adhesives and coatings. Currently, no public minimum order quantity (MOQ) is set in the database, and product pricing is presented as "negotiable". Actual procurement requires one-on-one business communication with the sales department of Guoli Chemical. Conventional packaging specifications for this product include 50kg plastic drums, 200kg plastic drums, and IBC totes. You can choose the corresponding packaging based on your production scale and usage volume. Generally, the minimum order quantity for chemical raw materials is based on the smallest packaging unit or a specific weight. However, for new customer sampling or large-volume contractual orders, Guoli Chemical typically offers flexible solutions. It is recommended to specify the expected annual usage and initial purchase quantity when inquiring, so the sales team can provide the best solution. Ordering Process Suggestions To ensure a smooth procurement process, it is recommended to follow these steps: Initial Inquiry: Contact the sales department via Guoli Chemical's official website, corporate email, or official phone line. Specify the product name (Polyether L-63) and CAS number you need to purchase. Requirement Confirmation: Provide your company's basic information, application field, and approximate required quantity to allow technical and commercial personnel to match the appropriate product grade and quotation. Obtain Quotation and Samples: The sales consultant will provide a formal quotation, minimum order quantity, and delivery time information. For first-time cooperation, you can usually request free samples for product performance verification. Contract Signing and Delivery: After both parties confirm the price, trade terms, and Certificate of Analysis (COA), sign the contract and complete payment and shipment according to the agreed batches. Key Parameters Overview Parameter Item Specification Value Appearance Colorless to slightly yellow transparent viscous liquid Hydroxyl Value 54~58 mgKOH/g Moisture Content ≤0.05% Acid Value ≤0.05 mgKOH/g pH Value (1% Aqueous Solution) 5.0-7.0 Kinematic Viscosity (25°C) Approximately 400 mm²/s Density (25°C) Approximately 1.03 g/cm³ Flash Point >220°C Packaging Specifications 50kg Plastic Drum / 200kg Plastic Drum / IBC Tote Storage Conditions Cool, dry, and well-ventilated; 5–40°C; keep container tightly sealed Precautions Although this product is classified as non-hazardous and practically non-toxic, chemical protective gloves and goggles should be worn during handling, especially to avoid eye contact. If splashed into eyes, rinse immediately with plenty of water and seek medical attention as necessary. Keep away from strong oxidizers and strong acids during storage. The drum lid should be sealed to prevent moisture. Slight stratification or turbidity after prolonged static storage is normal. Gently stir evenly before use; it does not affect product quality. The above technical parameters are sourced from Guoli Chemical's product database. Actual batch specifications are subject to the Product Analysis Certificate (COA) provided with the shipment.

Question 4

Is polyether L-63 environmentally compliant? Can a test report be provided?

Accepted Answer

Polyether L-63 is environmentally compliant and is an eco-friendly product that is readily biodegradable and has low toxicity to aquatic organisms. Detailed Description Polyether L-63's environmental attributes are specified in the safety data sheet of Hai'an Guoli Chemical Co., Ltd. According to the EU CLP Regulation (EC) No. 1272/2008 and China's GB 30000 series standards, this product is classified as a non-hazardous substance with no GHS hazard category, no pictogram, and no signal word. Its ecotoxicological data indicate that the product is environmentally friendly and does not belong to persistent, bioaccumulative, or toxic (PBT) substances, nor to very persistent, very bioaccumulative (vPvB) substances. Regarding biodegradability, polyether L-63 has been tested according to OECD 301F, with a degradation rate greater than 60% ThOD, lling into the "readily biodegradable" category. This means that after entering the environment, the product can be rapidly broken down by microorganisms and will not persist in the ecosystem for a long time. Additionally, its acute toxicity to aquatic organisms (fish, algae, daphnia) has an LL50 value greater than 100 mg/L, which is classified as low toxicity to aquatic organisms. The product has a high flash point (closed cup flash point greater than 200°C), is a non-flammable liquid, does not form explosive vapor/air mixtures, and poses low environmental safety risks during use and storage. Overall, polyether L-63 fully meets the basic requirements of current domestic and international environmental regulations under normal use conditions. Technical Parameters Environmental IndicatorsDataTest Method/Standard GHS Hazard ClassificationNon-hazardous substanceEU CLP Regulation (EC) No. 1272/2008 BiodegradabilityReadily biodegradable (degradation rate >60% ThOD)OECD 301F Acute Aquatic Toxicity (Fish/Algae/Daphnia)LL50 > 100 mg/L (low toxicity)OECD Aquatic Toxicity Standard Methods Bioaccumulation PotentialNo significant bioaccumulation potential— PBT/vPvB AssessmentNoneEU REACH Regulation Acute Oral Toxicity LD50 (rat)> 5000 mg/kg (practically non-toxic)OECD 401/420 Flash Point (Closed Cup)> 200°C (non-flammable liquid)— Application Recommendations Due to its excellent environmental properties, polyether L-63 is particularly suitable for industries with high requirements for green and environmental protection. In the production of end-consumer goods such as automotive interiors (seat foam, steering wheels, armrests, etc.), furniture industry (high-resilience cushioning materials), and shoe materials (microporous elastomers for soles and insoles), using polyether L-63 helps meet international environmental certification requirements such as REACH and OEKO-TEX standards. Choosing this product in polyurethane adhesive and coating formulations also helps reduce VOC emissions and overall environmental footprint of the final product. Regarding Test Reports The product quality inspection documents that Hai'an Guoli Chemical Co., Ltd. can provide typically include the Certificate of Analysis (COA), covering physical and chemical indicators such as hydroxyl value, acid value, moisture, and pH value. For third-party environmental certification documents such as ROHS test reports, REACH compliance declarations, and SGS test reports, as well as the MSDS/SDS safety data sheet, it is recommended to contact Guoli Chemical's sales or technical department directly to obtain the latest versions. Test reports for different batches may vary; please refer to the officially stamped documents. To obtain the above documents, you can visit the official website of Guoli Chemical or call customer service. When requesting, please specify the required report type and product batch number so that the staff can quickly retrieve the corresponding test data for you.

Question 5

What are the advantages of Polyether L-63 compared to similar products?

Accepted Answer

The core advantage of Polyether L-63 lies in its unique trifunctional glycerol ether molecular structure, which significantly outperforms conventional linear block copolymer polyethers in the polyurethane field. Detailed Explanation Polyether L-63 (CAS: 9003-11-6) is a polyoxypropylene polyoxyethylene glycerol ether initiated by glycerol from Guoli Chemical, with a molecular structure of a three-arm star (C₃H₅O[(C₃H₆O)x(C₂H₄O)yH]₃, molecular weight approx. 3000), featuring three active hydroxyl end groups. This is fundamentally different from other L-series products such as L-44 (Poloxamer 124), L-62 (Poloxamer 182), L-64 (Poloxamer 184), which are linear HO-(EO)x-(PO)y-(EO)xH block copolymers with only bifunctional structures, mainly used as conventional emulsifiers and wetting agents. The trifunctional structure allows Polyether L-63 to provide three-dimensional crosslinking points in polyurethane synthesis, which is key to imparting excellent resilience and mechanical properties to the final product. In contrast, bifunctional polyethers can only form linear chain segments and cannot build a highly elastic network. Therefore, Polyether L-63 is specifically optimized for cold-cure molding processes and has become a benchmark base polyol in high-end high-resilience foam fields such as automotive seats and furniture cushioning. In terms of safety and environmental protection, Polyether L-63 performs outstandingly: oral LD₅₀ >5000 mg/kg (practically non-toxic), non-irritating to skin, non-sensitizing, low aquatic toxicity (LL₅₀ >100 mg/L), and readily biodegradable (OECD 301F, degradation rate >60% ThOD), flash point >220°C (non-flammable liquid), with comprehensive safety indicators at a leading level among similar products. Technical Parameters ParameterPolyether L-63 (Guoli Chemical)Typical L-series Block Copolymers (e.g., L-44/L-62/L-64) Molecular StructureTrifunctional glycerol ether (star structure)Bifunctional linear block (PEO-PPO-PEO) Functionality (hydroxyl groups/molecule)32 Molecular WeightApprox. 3000Approx. 2000-3000 (varies by model) Hydroxyl Value (mgKOH/g)54~58Data varies by model (no unified comparison data) HLB Value7~8Varies with EO content, typically 7~29 Cloud Point (1% aqueous solution)About 34°CData varies by model (no unified comparison data) Density (25°C)About 1.03Data varies by model (no unified comparison data) Flash Point>220°C (non-flammable liquid)Varies by model BiodegradabilityReadily biodegradable (OECD 301F, >60% ThOD)Most are readily biodegradable Acute Oral Toxicity (LD₅₀)>5000 mg/kg (practically non-toxic)Most are low toxicity grade Application Recommendations Primary Scenario: Polyether L-63 is the preferred polyol for cold-cure molded high-resilience soft foam, suitable for automotive seats and furniture cushioning. In such applications, bifunctional polyethers cannot replace the three-dimensional network resilience provided by L-63. Self-skinning and Semi-rigid Foams: Used for automotive steering wheels, armrests, dashboard fillings, etc. L-63 can form an integrated structure with a dense skin and soft core, combining tactile feel, wear resistance, and energy absorption cushioning performance. Microcellular Elastomers: Suitable for high-performance shoe soles, shock-absorbing pads, etc., imparting high wear resistance, light weight, and tigue resistance to the material. Polyurethane Adhesives and Coatings: As a polyol component, it can improve adhesion, flexibility, and weather resistance. However, if only emulsification, wetting, or dispersion functions are needed without polyurethane crosslinking requirements, bifunctional L-series products (such as L-64) may offer better cost-effectiveness; please select according to the specific process. Precautions Polyether L-63 has low hygroscopicity but should still be stored in a sealed container to avoid prolonged exposure to humid environments that may alter the hydroxyl value and affect reaction stoichiometry. Recommended storage temperature 5~40°C, avoid freezing; after long-term storage, it is recommended to test key indicators such as hydroxyl value before use. When handling, wear chemical protective gloves and safety goggles to avoid eye contact—eye contact is the primary potential exposure risk (may cause mild transient irritation).

Question 6

How should Polyether L-63 be stored? What is its shelf life?

Accepted Answer

Polyether L-63 should be stored in a cool, dry, and well-ventilated environment. The recommended temperature is 5–40°C. Keep the container tightly sealed and use within the specified shelf life under the recommended storage conditions. Detailed Description Polyether L-63 (CAS No.: 9003-11-6) is a non-ionic polyether polyol with stable chemical properties. It is a non-hazardous substance and a non-flammable liquid (closed cup flash point >200°C), with relatively relaxed storage requirements. However, basic chemical storage practices should still be followed to ensure product quality is not compromised. The product is readily biodegradable and does not produce harmful decomposition products under normal storage conditions, but it should be kept away from heat sources, sparks, open flames, and incompatible substances (such as strong oxidizers and strong acids). The choice of storage container is also important. Containers made of carbon steel, stainless steel, or specific plastics are recommended. Opened containers should be properly resealed to prevent moisture or contamination. Do not store this product together with food, feed, or pharmaceuticals. Keep the storage area clean to prevent spill accumulation. After long-term storage, it is recommended to perform quality inspection before use to ensure product performance meets requirements. Storage Conditions Overview Storage ctorSpecific Requirements Environmental ConditionsDedicated warehouse or area that is cool, dry, and well-ventilated Temperature RangeRecommended 5–40°C, avoid freezing or prolonged exposure to high temperatures Container RequirementsCarbon steel, stainless steel, or specific plastic containers, keep tightly sealed Substances to AvoidHeat sources, sparks, open flames, strong oxidizers, strong acids Prohibited Mixed StorageDo not store together with food, feed, or pharmaceuticals Shelf Life Description According to the safety data sheet provided by Guoli Chemical, the shelf life of Polyether L-63 is described as: "Use within the specified shelf life under the recommended storage conditions. After long-term storage, it is recommended to test before use." Currently, no exact shelf life duration (e.g., 12 or 24 months) is given in the database. For the specific shelf life, please refer to the product specification sheet or the inspection report upon delivery. Generally, polyether polyol products stored sealed, away from light, and at room temperature have a shelf life of 12 months, but the final determination should be based on the product label or contract agreement. Precautions Wear chemical protective gloves (e.g., nitrile or neoprene gloves) and safety goggles during handling to avoid contact with eyes and skin. Keep the container tightly sealed and reseal promptly after opening to prevent product from absorbing moisture and deteriorating. Avoid freezing — Polyether L-63 is a viscous liquid; low temperatures may cause a significant increase in viscosity, affecting usability. Inventory management should follow the "first in, first out" principle. If there are questions or if confirmation of the shelf life for a specific batch is needed, please contact Guoli Chemical technical support or refer to the product COA (Certificate of Analysis).

Question 7

What safety precautions should be taken when using Polyether L-63?

Accepted Answer

Polyether L-63 is a non-hazardous substance with overall high safety, but basic industrial chemical management regulations must still be followed during handling, storage, and emergency response, with special attention to eye protection and spill prevention. Detailed Explanation Polyether L-63 (a poloxamer non-ionic surctant) is classified as a non-hazardous substance or mixture under the GHS classification system, with no hazard categories, no pictograms, and no signal words. Its acute oral toxicity LD50 (rat) is greater than 5000 mg/kg, belonging to the practically non-toxic level; it is not irritating to skin; it has low toxicity to aquatic organisms and is readily biodegradable. These characteristics make it relatively safe under normal use conditions, but this does not mean that safe handling practices can be completely ignored. In practical handling, the main potential risk is eye contact. According to OECD 405 test results, Polyether L-63 may cause mild temporary eye irritation. Therefore, eye protection is the top priority in personal protective equipment — chemical safety goggles or ce shields must be worn during handling. Although it is not irritating to the skin, it is still recommended to wear chemical protective gloves (such as nitrile or neoprene gloves) and appropriate protective work clothing during prolonged or repeated contact, and to thoroughly wash hands immediately after handling. Polyether L-63 has a closed-cup flash point greater than 200°C, making it a non-flammable liquid with low fire and explosion risk. However, thermal decomposition at high temperatures may produce harmful gases, so it should still be stored away from heat sources and open flames. In the event of a fire, use dry powder, carbon dioxide, alcohol-resistant foam, or water mist for extinguishing; do not use direct water jets. During spill handling, prevent the product from entering drains, waterways, or soil; collect it with inert absorbent materials (such as sand, vermiculite) and place it in a sealed chemical waste container for proper disposal. Key Points for Safe Operation Protection CategorySpecific Requirements Hand ProtectionWear chemical protective gloves (nitrile or neoprene), replace regularly Eye/ce ProtectionWear chemical safety goggles or ce shields (most critical protection item) Body ProtectionWear appropriate protective work clothing to avoid prolonged repeated skin contact Respiratory ProtectionNo special protection required under normal ventilation conditions; wear an organic vapor respirator in poorly ventilated areas Operating EnvironmentOperate in well-ventilated areas with local exhaust ventilation Prohibited ActionsNo eating, drinking, or smoking during handling Emergency Response Guide Emergency SituationResponse Measures Skin ContactImmediately remove contaminated clothing, rinse thoroughly with plenty of water and soap; if irritation persists, seek medical advice Eye ContactImmediately rinse carefully with plenty of water for several minutes; if wearing contact lenses and easy to remove, remove them during rinsing and continue rinsing thoroughly; if irritation persists, seek medical attention InhalationMove the person to fresh air; if feeling unwell, seek medical attention immediately IngestionRinse mouth, do NOT induce vomiting; immediately call a poison control center or doctor Spill HandlingEvacuate non-essential personnel; wear protective equipment; collect with inert absorbent materials (sand, vermiculite); prevent entry into drains and waterways; dispose of waste according to regulations Storage Condition Requirements Polyether L-63 should be stored in a cool, dry, well-ventilated dedicated warehouse or area, with a recommended storage temperature of 5–40°C, avoiding freezing or prolonged exposure to high temperatures. Containers must be kept tightly closed, preferably made of carbon steel, stainless steel, or specific plastics. After opening, containers should be properly resealed to prevent moisture absorption or contamination. Do not mix-store with food, feed, or pharmaceuticals; keep away from incompatible substances such as strong oxidizing agents and strong acids. Use within the specified shelf life under recommended storage conditions; it is advisable to test before use after prolonged storage. Precautions Although the product itself is non-hazardous, as a chemical product, it should be kept away from use by non-professionals in unintended applications. Contaminated work clothing should be stored separately, not taken out of the workplace, and must be thoroughly cleaned before reuse. Waste disposal should comply with national and local regulations; recommended treatment includes incineration or chemical treatment in licensed waste treatment cilities; do not discharge untreated waste into soil, waterways, or public sewage systems. This product has no known PBT (Persistent, Bioaccumulative, Toxic) or vPvB (very Persistent, very Bioaccumulative) assessment results, but environmental release should still be minimized. The above information is based on the product safety data sheet provided by Haian Guoli Chemical Co., Ltd.; users are responsible for ensuring product suitability in specific applications and compliance with all relevant regulations.

Question 8

How to use Polyether L-63? What is the recommended dosage?

Accepted Answer

Usage methods and recommended dosage of Polyether L-63 vary depending on the specific application formulation system; the database does not include standard dosage data for all fields. Detailed Explanation Polyether L-63 (CAS No.: 9003-11-6) is a nonionic polyether polyol, with its core use as a polyol component in polyurethane products participating in chemical reactions. In polyurethane systems, it reacts with isocyanates (such as MDI, TDI) to form polyurethane molecular chains, rather than being a simple physical addition. Therefore, its "dosage" needs to be calculated within the entire formulation system, primarily based on the hydroxyl value (54~58 mgKOH/g) of Polyether L-63 and the isocyanate index, while also considering the types and amounts of other polyols, blowing agents, and catalysts for comprehensive adjustment. When used as a surctant (emulsifying, wetting, dispersing, etc.), Polyether L-63 is typically added as an additive. Based on its HLB value of 7-8, it is suitable for water-in-oil (W/O) or partial oil-in-water (O/W) emulsion systems. The recommended dosage should be determined through gradient trials in sample testing, not by rigidly applying a fixed proportion. Application Recommendations Polyurethane High-Resilience Flexible Foam (Cold Cure Molding): Used as the main polyol component or in combination with other polyols, its proportion in the polyol mixture is typically 60~100 parts (based on 100 parts total polyols). It requires appropriate water (blowing agent), amine and tin catalysts, and isocyanate. Specific dosage must be determined through formulation calculation; starting with 75 parts in trials for optimization is recommended. Self-Skinning Foam / Semi-Rigid Foam / Microcellular Elastomer: L-63 usage in the polyol component generally ranges from 30~80 parts, adjusted based on the target product's hardness, resilience, and skin quality requirements. Microcellular elastomers (e.g., shoe soles) have higher demands on system compatibility and reaction speed control; it is recommended to first conduct small-scale tests to confirm compatibility with isocyanate prepolymers. Polyurethane Adhesives and Coatings: As the main or modified polyol in the A component (hydroxyl component) of two-component systems, its proportion can range from 20~80%. When used to enhance flexibility, start with 15-30% of the total A component; if used as the main polyol, strictly calculate the dosage according to the NCO/OH molar ratio of 1.0~1.05. Surctant Applications (Emulsifying/Dispersing/Wetting): When Polyether L-63 is only utilized for its surctant function (not as the main reactant), the recommended dosage is generally 0.5%~5% of the total system weight. For example, 2~5% for metalworking fluid emulsifiers, 0.5~2% for textile leveling agents or dispersants (based on working fluid). Optimal dosage should be confirmed through gradient trials due to variations in water quality, temperature, and other components. Technical Parameters Parameter Typical Value AppearanceColorless to slightly yellow transparent viscous liquid Ion TypeNonionic Molecular WeightApprox. 3000 Hydroxyl Value54~58 mgKOH/g HLB Value7~8 Acid Value≤0.05 mgKOH/g Water Content≤0.05% pH Value (1% Aqueous Solution)5.0~7.0 Density (25°C)Approx. 1.03 g/cm³ Kinematic Viscosity (25°C)Approx. 400 mm²/s Cloud Point (1% Aqueous Solution)Approx. 34°C Flash Point (Closed Cup)>220°C Active Content≥99% (Data source: Guoli Chemical Product Database) Precautions Prioritize Formulation Calculation: In polyurethane applications, dosage must be precisely calculated based on hydroxyl value and preset isocyanate index; do not add arbitrarily based on experience, as this may lead to abnormal foaming or incomplete curing. Moisture Control: Polyurethane reactions are extremely sensitive to moisture. Polyether L-63 has very low water content (≤0.05%). Keep the container lid sealed before use, and use promptly after opening to avoid moisture absorption affecting performance. Temperature Management: Viscosity increases at low temperatures in winter; it is recommended to use at 15~30°C. If freezing occurs (pour point approx. -30°C), stir evenly after returning to room temperature; quality is not affected. Personal Protection: Wear chemical protective gloves and safety goggles during operation to avoid splashing into eyes. If accidentally splashed into eyes, rinse with plenty of water and seek medical attention. Incompatible Substances: Keep away from strong oxidizers, strong acids to prevent deterioration.

Question 9

What are the main industries and processes where Polyether L-63 is applied?

Accepted Answer

Polyether L-63 is core applied in the polyurethane industry, covering five major areas: high-resilience flexible foam, self-skinning foam, semi-rigid foam, microcellular elastomers, and adhesives/coatings, mainly suited for processes such as cold-cure molded foaming. Detailed Description Polyether L-63 is a non-ionic polyether polyol (CAS No.: 9003-11-6), belonging to the poloxamer class of surctants, appearing as a colorless to slightly yellow transparent viscous liquid. Its excellent emulsifying, wetting, dispersing, and leveling functions make it play a key role in the polyurethane industry—it can act both as a foam stabilizer to regulate cell structure and as a polyol component participating in polymerization reactions, imparting excellent resilience and uniformity to the final products. From the industry distribution perspective, the application of Polyether L-63 is highly concentrated in automotive industry (seats, steering wheels, instrument panels, energy-absorbing blocks, headrests, armrests, and other interior/exterior trim parts), furniture and home furnishings (high-resilience cushioning materials, mattresses), footwear manucturing (high-performance soles, insoles), construction sealing, and general industrial coatings and adhesives, among other fields. Its good tolerance to acids, alkalis, and hard water ensures stable performance under complex working conditions. Detailed Application Processes and Scenarios 1. Polyurethane High-Resilience Flexible Foam — Cold-Cure Molding ProcessThis is the core application direction of Polyether L-63. In cold-cure molded foaming, L-63 serves as a key polyol component, producing foam products with excellent elastic recovery and comfort. Typical products include automotive seats and high-end furniture cushioning materials. Its stable foam performance provides higher processing tolerance. 2. Self-Skinning Foam — Integral Molding ProcessUsed for manucturing products with a dense skin and soft core integrated structure, such as automotive steering wheels, armrests, headrests, and other interior trim parts. L-63 helps achieve a self-skinning effect with good tactile feel, abrasion resistance, and appearance quality. 3. Semi-Rigid Foam — Energy Absorption and Cushioning ApplicationsApplied in automotive instrument panel filling, door interior energy-absorbing blocks, etc. L-63 provides balanced resilience and impact energy absorption characteristics, meeting automotive lightweight and safety regulations. 4. Microcellular Elastomers — Casting/Injection ProcessesUsed for preparing high-performance microcellular elastomers such as shoe soles, insoles, shock-absorbing pads, and seals, endowing materials with high wear resistance, lightweight, and tigue resistance. 5. Polyurethane Adhesives and Coatings — Two-Component SystemsAs a polyol component in two-component polyurethane systems, it improves adhesion, flexibility, chemical resistance, and weather resistance, widely used in automotive coatings, construction sealing, and general industrial bonding. Application Recommendations It is recommended to operate in a well-ventilated environment with local exhaust ventilation. Storage temperature is recommended to be controlled at 5–40 °C, avoiding freezing or prolonged high-temperature exposure. Use carbon steel, stainless steel, or specific plastic containers for storage, keeping containers tightly sealed and moisture-proof. After long-term storage, it is advisable to first conduct small-scale tests to verify performance before batch use. When blending with other polyols or additives, it is recommended to confirm formulation stability through compatibility testing. Precautions This product is non-hazardous, with a flash point above 200 °C, classified as a non-flammable liquid, but high-temperature decomposition may produce harmful gases. During operation, it is recommended to wear chemical protective gloves (nitrile or neoprene) and safety goggles. Eye contact may cause mild temporary irritation; if the product gets into the eyes, rinse immediately with plenty of water and seek medical advice. Waste should be disposed of in accordance with national and local regulations and must not be discharged into soil, waterways, or public sewage systems. Biodegradability is good (OECD 301F method, degradation rate > 60% ThOD), with low toxicity to aquatic organisms.

Question 10

What are the physicochemical and technical parameters of Polyether L-63?

Accepted Answer

Polyether L-63 is a nonionic polyether polyol (Poloxamer type), with CAS number 9003-11-6, appearing as a colorless to slightly yellow transparent liquid, molecular weight approximately 3000, and has excellent emulsifying, wetting and dispersing properties. Detailed Description Polyether L-63, full name polyoxypropylene polyoxyethylene glycerol ether, belongs to the Poloxamer class of nonionic surctants. This product has an HLB value between 7 and 8, a cloud point of approximately 34°C (1% aqueous solution), good solubility in water, and is also soluble in organic solvents such as ethanol and ether. The product has an active matter content ≥99%, solid content ≥99%, moisture ≤0.05%, free alcohol ≤0.5%, and is of very high purity. As an important intermediate in the polyurethane industry, the hydroxyl value of Polyether L-63 is between 54 and 58 mgKOH\/g, which determines its reactivity in polyurethane reactions. The product has an acid value ≤0.05 mgKOH\/g, iodine value ≤1, unsaturation ≤0.01 mmol\/g, indicating stable chemical properties and few side reactions. The surce tension is approximately 38 mN\/m (0.1% aqueous solution, 25°C), and the critical micelle concentration is approximately 0.1% (w\/v), exhibiting excellent intercial activity. In terms of safety, the flash point of this product is greater than 220°C, making it a non-flammable liquid; the oral LD50 (rat) is greater than 5000 mg\/kg, indicating it is practically non-toxic; it is non-irritating to the skin and may cause slight temporary irritation to the eyes; it is readily biodegradable and considered an environmentally friendly product. Technical Parameters Parameter Item Technical Indicator Product Name Polyether L-63 (Polyether Polyol L-63) Full Chemical Name Polyoxypropylene Polyoxyethylene Glycerol Ether CAS Number 9003-11-6 Molecular Formula C3H5O[(C3H6O)x(C2H4O)yH]3 Molecular Weight ~3000 Ionic Type Nonionic Appearance Colorless to slightly yellow transparent viscous liquid Active Matter Content ≥99% Solid Content ≥99% Density (25°C) Approximately 1.03 g\/cm³ Kinematic Viscosity (25°C) Approximately 400 mm²\/s Low Shear Viscosity (25°C) Approximately 400 mPa·s Refractive Index (25°C) Approximately 1.452 Pour Point Approximately -30°C HLB Value 7~8 Cloud Point (1% Aqueous Solution) Approximately 34°C pH Value (1% Aqueous Solution) 5.0~7.0 pH Value (5% Aqueous Solution) 5.0~7.0 Hydroxyl Value 54~58 mgKOH\/g Acid Value ≤0.05 mgKOH\/g Iodine Value ≤1 Unsaturation ≤0.01 mmol\/g Moisture ≤0.05% Free Alcohol ≤0.5% Surce Tension (0.1% Aqueous Solution, 25°C) Approximately 38 mN\/m Critical Micelle Concentration (CMC) Approximately 0.1% (w\/v) Flash Point (Closed Cup) >220°C Solubility Soluble in water, ethanol, ether and other organic solvents Foaming Characteristics Low foaming Penetration Power Good Alkali Resistance Good Hygroscopicity Low Chemical Stability Stable, no decomposition under normal storage conditions Heavy Metals (as Pb) ≤10 mg\/kg Arsenic (As) ≤2 mg\/kg Packaging Specifications 50kg plastic drum \/ 200kg plastic drum \/ IBC tote Application Suggestions The core application field of Polyether L-63 is the polyurethane industry. Based on its hydroxyl value of 54~58 mgKOH\/g and excellent surce activity, it is particularly suitable for the following scenarios: Polyurethane High Resilience Flexible Foam: Used in cold-cure molding processes for producing automotive seats, furniture cushions, etc., recommended as a base polyether polyol component. Integral Skin Foam: Used in manucturing automotive steering wheels, armrests, headrests and other interior parts, forming an integrated structure with a dense skin and soft core. Semi-Rigid Foam: Applied in automotive dashboards, energy-absorbing bumpers, etc., providing balanced resilience and energy absorption performance. Microcellular Elastomers: Suitable for products such as shoe soles, insoles, cushion pads, seals, etc., imparting high wear resistance and excellent resilience to the material. Polyurethane Adhesives and Coatings: As the polyol component in two-component systems, it can improve adhesion, flexibility and weather resistance. As a nonionic surctant, its HLB value of 7~8 also makes it suitable for use as an industrial auxiliary agent in emulsification, wetting and leveling. Precautions Storage Conditions: Recommended storage temperature is 5~40°C, avoid freezing (pour point approximately -30°C) or prolonged exposure to high temperatures. Keep containers tightly sealed to prevent moisture. Eye Protection: This product may cause slight temporary irritation to the eyes. Wear chemical safety goggles during operation. In case of eye contact, rinse immediately with plenty of water and seek medical advice. Usage Restrictions: This product is a non-hazardous substance, but non-professionals should avoid using it for unintended purposes. Wash hands and exposed skin thoroughly after handling. Disposal: The product is readily biodegradable, but disposal must still follow local regulations. Do not discharge untreated waste into water bodies or soil.

Polyether L-63

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Property	Value
CAS No.	9003-11-6
Molecular Formula	C3H5O[(C3H6O)x(C2H4O)yH]3
Appearance	Colorless to slightly yellow transparent liquid
Ionic Type	Nonionic
Avg. Molecular Weight	~3000
Cloud Point	~34 (1%aq. soln.)
Active Content	≥99%
pH Value(1%)	5.0-7.0 (1%aq. soln.)
pH Value(5%)	5.0-7.0 (5%aq. soln.)
Iodine Value	≤1
Solubility	Soluble in water, ethanol, ethyl ether and other organic solvents
Surface Tension	~38 (0.1%aq. soln., 25°C)
CMC	~0.1% (w/v)
Acid Value	≤0.05
Hydroxyl Value	54~58
Moisture	≤0.05
Density	~1.03 (25°C)
Kinematic Viscosity	~400 (25°C, mm²/s)
Refractive Index	~1.452 (25°C)
Flash Point	>220°C
Hygroscopicity	Low
Chemical Stability	Stable; ambient temperature storage
Penetration	Good
Foam Property	Low foam
Alkali Resistance	Good
Unsaturation	≤0.01 mmol/g
Viscosity	Low viscosity liquid
Melting Point	No distinct melting point (liquid); pour point ~-30°C
Low Shear Viscosity	~400 (mPa·s, 25°C)
Solid Content	≥99%
Free Alcohol	≤0.5%
Heavy Metal	≤10 (as Pb)
Arsenic	≤2

Polyether L-63

Product Details

Applications

Properties

Safety

Product Overview

Performance Features

Packaging and Storage

Polyether/Poloxamer Applications

Product Properties

Safety

GHS

Handling

Storage

First Aid

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