Question 1

Is polyether defoamer GP-330 harmful to human body? Does it affect the environment?

Accepted Answer

Polyether defoamer GP-330 is a non-hazardous substance with low toxicity and low risk. Under normal use conditions, its impact on human health and the environment is relatively minor, but standard operating procedures must still be followed and direct discharge into water bodies should be avoided. Detailed Description Polyether defoamer GP-330 (glycerol polyoxypropylene ether) is a non-ionic surctant with strong physiological inertness. Currently, it has no known significant hazard classification and is not classified as a dangerous substance. From a human health perspective, this product has high safety and does not pose an acute toxicity risk under normal industrial operations. Its main potential effects are limited to mild mechanical irritation to the skin and eyes – that is, the product itself is not chemically corrosive or sensitizing, but prolonged direct contact may cause skin detting or dryness, or eye discomfort. It is particularly important to note that during high-temperature processing, if the product undergoes thermal decomposition, it may produce potentially irritating fumes (such as carbon monoxide, carbon dioxide, etc.), so adequate ventilation must be ensured when high temperature or open flame operations are involved. From an ecological and environmental perspective, polyether defoamer GP-330 is expected to exhibit low toxicity to aquatic organisms and is not classified as a high ecological risk substance. However, as an organic chemical, direct large-scale discharge into water bodies without treatment may still cause local eutrophication or cumulative effects on aquatic ecosystems. Therefore, after use, the product should be prevented from entering drainage systems, surce waters, or soil. Waste must be disposed of by qualified professional institutions in accordance with regulations, and dumping is strictly prohibited. Application Recommendations To ensure safe use, the following protection and management measures are recommended: Personal Protection: Wear chemical safety gloves (recommended nitrile rubber or neoprene) and sealed safety goggles, and standard protective work clothing during operation. Ventilation Conditions: Routine operations can be carried out in a well-ventilated environment; if high-temperature processing or conditions that may generate aerosols are involved, local exhaust ventilation should be used. Emergency cilities: Emergency eyewash stations and safety showers should be available in the operating area. Environmental Management: Residues and cleaning wastewater after use should be collected and treated centrally, and must not be discharged directly into sewers or natural water bodies. In case of spillage, use inert materials such as sand, vermiculite to absorb and collect, seal and hand over to professional institutions for disposal. Storage Conditions: Store sealed in a cool, dry, well-ventilated place, recommended temperature 5°C to 35°C, away from fire sources and strong oxidizers. Precautions This product itself is not flammable, but thermal decomposition can produce irritating fumes. Firefighters must wear self-contained breathing apparatus when extinguishing fires. If accidentally contacted with eyes, immediately flush with plenty of flowing water, holding eyelids open, for at least 15 minutes, and seek medical attention as soon as possible. After skin contact, first wipe off with a dry cloth, then thoroughly wash with soap and water. Do not ingest. If accidentally swallowed, do not induce vomiting; rinse mouth immediately and seek medical attention. Use promptly after opening; reseal any unused product for storage.

Question 2

What should I do if I encounter problems when using polyether defoamer GP-330? How to obtain technical support?

Accepted Answer

If problems arise when using polyether defoamer GP-330, first follow the procedure of "Stop use → Troubleshoot → Adjust → Contact the manucturer"; for technical support, you can directly contact the technical team of Haian Guoli Chemical Co., Ltd. Detailed Instructions Polyether defoamer GP-330 (glycerol polypropylene ether, CAS No.: 68439-50-9) is a non-ionic defoamer with excellent performance. However, in practical applications, due to differences in formulation systems, process conditions, addition methods, etc., problems such as unsatisctory defoaming effect, coating film defects, or system turbidity may still occur. In such cases, immediately stop adding, retain on-site samples and batch records for subsequent analysis. Initial troubleshooting can start from the following aspects: First, confirm whether the dosage is within a reasonable range (usually recommended at 0.1% to 0.5% of the total system weight; the optimal dosage should be determined through gradient tests based on actual working conditions); second, check whether the addition timing is correct (generally recommended to add during the grinding or dispersion stage to ensure full dispersion); third, confirm whether the system pH is within the tolerance range of GP-330 (performance is stable under pH 5~8 conditions). If the problem remains unresolved after these adjustments, it is recommended to take a small sample for laboratory simulation, comparing the effects of different dosages and addition sequences to pinpoint the cause. Common Problem Troubleshooting Guide Common ProblemPossible CauseRecommended Action Slow defoaming speed, short foam suppression timeInsufficient dosage, improper addition method, interference from surctant types in the systemGradually increase dosage and perform gradient tests; add before foam generation or during the grinding stage; confirm compatibility with other additives Shrinkage holes or fisheyes on the coatingExcessive dosage, insufficient dispersion, poor compatibility with system resinReduce dosage; extend mixing time until fully dispersed; test the effect of different dosages on coating appearance with small samples Product stratification or turbidityImproper storage temperature (freezing or high temperature), reaction with other components in the systemCheck if storage temperature is within 5°C~35°C; confirm no mixing with strong acids or strong oxidizing agents; test stability of small sample mixed individually with each component Decreased defoaming performance under high-temperature conditionsSystem temperature exceeds the effective working range of GP-330GP-330 has excellent temperature resistance, but extreme high temperatures still need to be confirmed by experiments; consider increasing dosage or compounding with other high-temperature resistant defoamers Ways to Obtain Technical Support No direct contact information is available in the database. It is recommended to first check the Safety Data Sheet (SDS) and product label, which usually contain the manucturer's contact information. You can also contact Haian Guoli Chemical Co., Ltd. through the following general channels: Official Channels: Visit the Guoli Chemical official website, submit a technical consultation form under the "Contact Us" or "Technical Support" column, attaching a detailed problem description, operating conditions, and pictures/videos. Phone Consultation: Call the company's sales or technical hotline (specific number subject to the official website), communicate directly with engineers, and explain the problem you encountered and the troubleshooting steps taken. Email Support: Organize the problem description, batch number, dosage, process conditions, and other information into a document, and send it to the Guoli Chemical technical support email for systematic analysis by the technical team. Distributor/Agent: If you purchased through a distributor, contact them to forward your technical requirements. Precautions Before receiving clear guidance from the technical team, do not arbitrarily add large amounts or attempt experimental compounding to avoid material waste or equipment damage. When providing technical support, the required information includes: product batch number, dosage, addition steps, system composition (main resin/additive types), operating temperature and pH value, and a clear description or photo/video of the foam generation conditions. For safety or health issues (e.g., inhalation of thermal decomposition fumes, eye contact), immediately take appropriate emergency measures and seek medical attention, then contact the manucturer to report the situation.

Question 3

How to purchase polyether defoamer GP-330? What is the minimum order quantity?

Accepted Answer

Polyether defoamer GP-330 can be directly purchased through the official sales channels of Haian Guoli Chemical Co., Ltd. The specific minimum order quantity needs to be confirmed with the sales team. Standard packaging includes 50kg plastic drums and 200kg iron drums. Detailed Description Polyether defoamer GP-330 (CAS: 68439-50-9) is a high-efficiency nonionic defoamer product directly supplied by Guoli Chemical. Its chemical name is glycerol polypropylene ether. The company provides direct sales of industrial-grade products nationwide. Customers can complete the procurement process by: calling the Guoli Chemical official sales hotline for the latest quotation, or submitting procurement needs online through the company's official website. Since product prices are affected by raw material market fluctuations, purchase quantity, transportation distance, and other ctors, the reference prices in the database have limited timeliness. The actual transaction price needs to be confirmed one-on-one with the sales team. Regarding the minimum order quantity (MOQ), the product database does not yet include clear minimum order information. According to the packaging specifications, the product is available in two standard packaging forms: 50kg plastic drums and 200kg iron drums. Generally, the minimum order unit for chemical raw materials is based on integral packaging drums. The specific minimum order threshold needs to be determined based on inventory conditions, logistics arrangements, and mutual negotiation. It is recommended to request samples (if sample testing is needed) for small-scale verification of defoaming effectiveness before bulk purchasing. Technical Parameters ParameterSpecification Product NamePolyether Defoamer GP-330 CAS No.68439-50-9 AppearanceColorless to slightly yellow transparent liquid Ion TypeNonionic Cloud Point (1% aqueous dispersion)≤20℃ Hydroxyl Value54.5～58.5 mg KOH/g pH Value (1% aqueous solution)5.0～8.0 Kinematic Viscosity (25℃)300～500 mm²/s Density0.85～1.05 g/cm³ Standard Packaging50kg plastic drum / 200kg iron drum Reference PricePlease contact the sales team for the latest quotation Purchasing Suggestions Sample Testing: It is recommended to first request a free sample from Guoli Chemical for first-time users to verify the defoaming and foam-suppressing performance in the actual formulation system, confirm compatibility with the system, and avoid coating defects such as shrinkage cavities and fisheyes after bulk purchase. Packaging Selection: Users with smaller consumption can choose 50kg plastic drum packaging, which is easy to handle and use in batches. For large-volume production enterprises, 200kg iron drum packaging is recommended, as it offers better cost advantages per ton. After opening, use promptly and reseal unused portions, storing in a cool, dry place at 5℃ to 35℃. Logistics Arrangements: The product is a non-hazardous substance and can be shipped via conventional land transportation. Specific freight and transit time are calculated based on the shipping location of Hai'an City, Jiangsu Province. The sales team will provide an accurate logistics plan according to the delivery address. Notes The above price information is for reference only. The actual price is subject to confirmation by the Guoli Chemical sales team. Price update date: June 10, 2026. Although the product is non-hazardous, it is recommended to wear chemical safety goggles and impermeable gloves during operation to avoid direct contact with skin and eyes. Keep the container sealed during storage, away from fire and heat sources, and strictly avoid mixing with strong oxidizers. If MSDS (Material Safety Data Sheet) or COA (Certificate of Analysis) is required, request them from the sales staff during purchase.

Question 4

Does the polyether defoamer GP-330 meet environmental requirements? Can a test report be provided?

Accepted Answer

Polyether defoamer GP-330 has good environmental safety, meeting the environmental requirements of conventional water-based systems, but specific test reports need to be obtained from Guoli Chemical. Detailed Description Polyether defoamer GP-330 (glycerol polypropylene ether, CAS: 68439-50-9) has multiple advantages in terms of environmental compliance. According to the safety data in Guoli Chemical's product database, this product is clearly classified as a non-hazardous substance, with strong physiological inertness and no known significant hazard classifications. In terms of ecotoxicity, this product shows low toxicity to aquatic organisms, meeting the basic requirements of current green chemical products. In terms of biodegradability, GP-330, as a polyether nonionic surctant, contains polyoxypropylene segments in its molecular structure that are relatively hydrophobic, but the overall structure gradually degrades in the environment over a certain period of time. The product itself is non-flammable (flash point >200℃), and does not generate VOC emissions during normal storage and use, complying with VOC restriction regulations. Heavy metal content is strictly controlled (Pb ≤10 mg/kg, arsenic ≤2 mg/kg). It should be clarified that although the product has good environmental performance, it is classified as a slightly hygroscopic substance. Waste disposal should be handled by professional institutions in accordance with local regulations, and should not be directly discharged into water environments. The product itself does not contain harmful substances such as APE or silicone that are restricted in European and American countries. Technical Parameters Parameter Index Environmental Significance Heavy metals (as Pb) ≤10 mg/kg Complies with RoHS, REACH and other regulations Arsenic (As) ≤2 mg/kg r below hazardous substance thresholds Flash point (open cup) >200℃ Non-flammable, reducing fire risk Ecotoxicity Low toxicity to aquatic organisms Reduces risk of water pollution Hazard class Non-hazardous substance Convenient for transport and storage pH value (1% aqueous dispersion) 5.0~8.0 Near neutral, environmentally friendly Application Suggestions GP-330, as a high-efficiency defoamer specifically designed for water-based systems, is suitable for industries such as coatings, adhesives, inks, papermaking, and water treatment. In scenarios with strict environmental requirements (e.g., green building coatings, food packaging paper), this product is an ideal choice due to its low ecotoxicity and non-hazardous properties. The recommended dosage is typically 0.1% to 0.5% of the total system weight, and the specific amount should be adjusted according to actual process conditions to achieve an optimal balance between defoaming effect and cost. Precautions Although the product is environmentally friendly, it should be avoided from being directly discharged into rivers and lakes without treatment. Waste disposal must comply with local environmental regulations. There is currently no formal test report issued by a national third-party testing agency for this product in the database. If test reports from agencies such as SGS or CTI are needed, please contact Guoli Chemical directly. Some customers may require additional REACH or RoHS compliance declarations, which can be applied for from Guoli Chemical based on the procurement batch. Decomposition of the product at high temperatures (>200℃) may produce irritating fumes such as CO and CO₂, so good ventilation should be ensured during processing.

Question 5

What are the advantages of polyether defoamer GP-330 compared to other similar products?

Accepted Answer

The core advantages of polyether defoamer GP-330 lie in the four characteristics of "st defoaming, long-lasting foam suppression, high temperature resistance, and strong universality." It is a nonionic low-HLB polyether structure with excellent compatibility with water-based systems, making it less prone to causing film defects. Its overall performance under high temperature and complex working conditions is superior to common mineral oil defoamers and general-purpose silicone defoamers. Detailed Explanation Polyether defoamer GP-330 (CAS: 68439-50-9) is a nonionic glycerol polypropylene ether, which is distinctly different from commonly available mineral oil defoamers and silicone defoamers at the molecular structure level. Compared with mineral oil defoamers, GP-330 does not exhibit oil separation under high temperature conditions, and its temperature resistance is significantly better. Compared with general-purpose silicone defoamers, although GP-330 may be slightly slower in bubble breaking, its biggest highlight is that it is less likely to cause film defects such as shrinkage cavities and fish eyes. This is a decisive advantage in coatings, inks, and adhesives applications—silicone defoamers, if not evenly dispersed, often lead to coating surce defects, while GP-330 naturally has good system compatibility. Within the Guoli Chemical product line, GP-330 differentiates itself from paper defoamer XS-02 (polyether ester type, CAS: 9004-81-3) and defoamer king G470 (polyether-modified silicone type). XS-02 is more suitable for specific processes such as papermaking, and although G470 combines the st defoaming ability of silicone, GP-330 remains a safer choice in terms of system compatibility and anti-shrinkage performance. Overall, GP-330 is the most versatile and lowest-risk defoamer type in water-based systems. Technical Parameters Parameter ItemPolyether Defoamer GP-330Typical Mineral Oil DefoamerTypical Silicone Defoamer Ion TypeNonionicNonionicNonionic\/Anionic HLB ValueApprox. 1—— AppearanceColorless to slightly yellow transparent liquidLight yellow to amber liquidMilky white liquid Cloud Point (1% aqueous dispersion)≤20°CNot applicableNot applicable Viscosity (25°C)300~500 mPa·sDepends on productDepends on product Flash Point (Open Cup)＞200°CGenerally ＞150°CGenerally ＞100°C Temperature ResistanceExcellent, maintains defoaming activity at high temperaturesProne to ilure and oil separation at high temperaturesMay demulsify or cause oil floating at high temperatures Film Defect RiskVery low, not prone to shrinkage cavities\/fish eyesRisk of oil stainsHigher risk of shrinkage cavities Chemical StabilityResistant to acids, alkalis, and hard waterGeneral acid and alkali resistanceNot resistant to strong alkalis Freezing Point＜-20°C—— Density0.85~1.05—— Application Recommendations Recommended Dosage: In various water-based systems, the recommended addition amount of GP-330 is 0.01%~0.3% of the total formula weight. The specific dosage should be determined through experiments based on the foaming degree of the system and process conditions. The liquid form cilitates measurement and addition; it can be added directly during material stirring or pre-dispersed with a small amount of water before adding. Priority of Applicable Scenarios: Preferred Scenario — Water-based Coatings, Water-based Inks, Adhesives: For applications requiring high film appearance quality and no shrinkage cavities or pinholes, GP-330 is a safer choice than silicone defoamers. Optimal Scenario — Textile Printing and Dyeing, Industrial Water Treatment: In applications involving high temperature and high shear conditions, GP-330's temperature resistance and long-lasting foam suppression make it outperform mineral oil defoamers. Also Suitable — Metalworking Fluids, Industrial Cleaning, Papermaking: GP-330 can handle these applications, but if extremely st defoaming speed is required, it may be blended with a small amount of silicone defoamer. Precautions GP-330 has a low cloud point (≤20°C) and may precipitate and become turbid in cold water. This is a normal "reverse solubility" phenomenon of polyether-type products and does not affect defoaming performance. It will return to transparency as temperature rises. This product is a dispersion that is difficult to dissolve in water, not a true solution. Prolonged standing may cause slight stratification. Stir gently to mix before use; it does not affect performance. Recommended storage temperature is 5°C~35°C, avoiding freezing and prolonged high temperature exposure. If used for the first time in coatings or adhesive formulations, it is advisable to conduct a small-scale test to confirm that there is no adverse effect on gloss, adhesion, transparency, etc., before large-scale use.

Question 6

How to store polyether defoamer GP-330? What is its shelf life?

Accepted Answer

Polyether defoamer GP-330 should be sealed and stored in a cool, dry, and well-ventilated place at 5℃~35℃. There is no official clear indication of the shelf life, but under these conditions, it can usually be stably stored for more than 12 months. Detailed Description The storage conditions of polyether defoamer GP-330 directly affect its defoaming performance and product stability. According to the product data of Guoli Chemical, this product is a colorless to light yellow transparent viscous liquid with a freezing point below -20℃. However, under extreme low temperatures, physical changes such as increased viscosity may occur, so freezing must be strictly avoided. It is recommended to store the product in a dedicated warehouse that is cool, dry, well-ventilated, away from fire and heat sources, and protected from direct sunlight. After opening the product packaging, it should be used as soon as possible; if not fully used, the container must be immediately re-sealed to prevent moisture and impurities from entering the air, which could cause moisture absorption, deterioration, or contamination. The floor of the storage area should be treated with anti-seepage measures, and containment dikes should be set up to accommodate possible leaks. The product itself has strong chemical stability and is stable under normal temperature and pressure, but it should be avoided from being stored together with strong oxidizers and acidic substances. Regarding the shelf life, the official information from Guoli Chemical states that "the product performance remains stable under recommended storage conditions," but no specific shelf life in months is given. Under normal circumstances, unopened polyether defoamer GP-330 can be stably stored for more than 12 months at 5℃~35℃. It is recommended to follow the production date information on the batch label and confirm the quality before use through visual inspection (no layering, no abnormal turbidity, no obvious sediment). For special shelf life requirements, it is recommended to directly contact Guoli Chemical customer service for confirmation specific to the batch. Storage Condition Parameters Storage ctorSpecific Requirement Storage Temperature5℃ to 35℃ (recommended) Storage EnvironmentCool, dry, well-ventilated dedicated warehouse Container StatusMust be kept sealed; after opening, use as soon as possible and reseal Prohibited Co-storageAvoid storing together with strong oxidizers and acidic substances Light RequirementsAvoid direct sunlight Temperature RestrictionsAvoid freezing (freezing point below -20℃) and long-term high-temperature storage Fire Source ManagementKeep away from fire and heat sources Floor ProtectionStorage area floor should be treated with anti-seepage measures and equipped with containment dikes Packaging Specifications The standard packaging specifications of Guoli Chemical polyether defoamer GP-330 are: 200kg iron drum 50kg plastic drum Specific packaging specifications can be customized according to customer requirements. Precautions Although the freezing point of the product is below -20℃, low temperatures may cause a significant increase in viscosity. If abnormal viscosity is found before use, the product can be naturally warmed in an environment above 15℃ and gently stirred until uniform. Direct heating with open flames is strictly prohibited. When opening and taking materials, use clean and dry tools to avoid cross-contamination; tighten the lid immediately after each material removal. If stored for a long time, it is recommended to check the product appearance before use: it should be a colorless to light yellow transparent viscous liquid. If obvious layering, turbidity, or odor appears, stop using and contact the supplier for confirmation. This product is slightly hygroscopic. Long-term exposure to high humidity environments may affect defoaming performance, so sealing is crucial.

Question 7

What safety precautions should be noted when using polyether defoamer GP-330?

Accepted Answer

When using polyether defoamer GP-330, the core safety requirements are to ensure personal protection, maintain ventilation, prevent leakage, and follow correct emergency procedures. This product has strong physiological inertness and no significant hazards, but improper handling may still cause mild irritation. Detailed Explanation Polyether defoamer GP-330 (glycerol polyoxypropylene ether) is a non-ionic surctant. It is not classified as a hazardous substance and has strong physiological inertness. However, in daily industrial operations, standardized safety procedures must be established. This not only protects operators from mild mechanical irritation such as dry skin or eye discomfort caused by prolonged or heavy exposure but also prevents product leakage from burdening the environment. The core of safe operation lies in "prevention." Before handling, be sure to read the product safety instructions, work in a well-ventilated area, and always wear chemical safety goggles and impermeable gloves. Avoid contact with eyes, skin, and clothing. After operation, immediately wash exposed parts such as hands thoroughly with water and soap. Additionally, prevent product splashing or leakage into drains, surce waters. When operating at high temperatures or near open flames, enhance ventilation to prevent accumulation of thermal decomposition fumes. Technical Parameters Safety-related Parameter Specification/Description Product State Colorless to light yellow transparent viscous liquid Hazard Classification Non-hazardous substance Main Health Hazards Strong physiological inertness, may cause mild mechanical irritation to skin/eyes Flash Point (Open Cup) >200℃ (Product itself is not flammable) Ecotoxicity Low toxicity to aquatic organisms Storage Temperature Recommended 5℃ to 35℃ Application Recommendations To ensure safe use, incorporate the following protective and emergency measures into your daily operating procedures: Personal Protective Equipment (PPE): Eyes/ce: Must wear sealed chemical safety goggles. Hands: Wear impermeable gloves made of nitrile rubber or neoprene. Body: Wear standard protective work clothing. Respiratory: Normally no special protection required under normal ventilation. If irritating fumes are generated during high-temperature processing, wear a filtering respirator for organic vapors/particulates. Leak Emergency: In case of leakage, immediately contain and collect the spilled material using inert materials such as sand, vermiculite, etc., and place it in a sealed container for disposal according to regulations. When cleaning the floor, do not allow rinsing water to enter drains. Fire Response: The product itself is not flammable, but thermal decomposition may release irritating fumes such as carbon monoxide and carbon dioxide. Firefighters must wear self-contained breathing apparatus and full protective clothing when extinguishing fires. Surrounding fires can be fought with water spray, foam, dry powder, or carbon dioxide extinguishers. Precautions Storage Requirements: Store sealed in a cool, dry, well-ventilated place, away from heat sources and open flames, and avoid mixing with strong oxidizers and acids. Use promptly after opening; reseal any unused portion. First Aid Measures: If accidentally swallowed, do not induce vomiting; immediately rinse mouth with water and seek medical attention. For skin contact, first wipe off with a dry cloth, then wash thoroughly with plenty of soap and water. For eye contact, rinse continuously with running water for at least 15 minutes and seek medical help. Environmental Requirements: Although ecotoxicity is low, avoid discharge into water bodies without treatment. Waste must be disposed of professionally by qualified agencies (e.g., incineration); do not dump indiscriminately.

Question 8

How to use polyether defoamer GP-330? What is the recommended dosage?

Accepted Answer

GP-330 is a liquid polyether defoamer. It is recommended to add it directly or after dilution into the system. The typical dosage is 0.01% to 0.3% of the total system weight. The specific dosage should be determined through experiments based on the actual process. Detailed Explanation Polyether defoamer GP-330 (CAS No.: 68439-50-9) appears as a colorless to light yellow transparent viscous liquid. It is a nonionic surctant with an HLB value of approximately 1 and has good dispersibility in water. The product is in liquid form, making it very convenient for metering and addition. It can be directly added at any stage of the production process, disperses evenly, and is not prone to stratification or sedimentation, which is a major advantage over solid defoamers in terms of ease of use. GP-330 is specifically designed for water-based systems, offering excellent defoaming speed and long-lasting foam suppression. It has strong chemical stability, can withstand acidic, alkaline, and hard water conditions, and maintains stable defoaming activity even at high temperatures. In practical applications, GP-330 achieves foam breaking by disrupting the liquid film structure of foam, while its low HLB value allows it to continuously suppress foam formation in the system, effectively preventing foam regeneration. Technical Parameters Parameter NameValue/DescriptionData Source AppearanceColorless to light yellow transparent viscous liquidGuoli Chemical Product Database Ionic TypeNonionicGuoli Chemical Product Database HLB Value1Guoli Chemical Product Database Cloud Point (1% Aqueous Dispersion)≤20°CGuoli Chemical Product Database pH Value (1% Aqueous Dispersion)5.0~8.0Guoli Chemical Product Database Density0.85~1.05 g/cm³Guoli Chemical Product Database Kinematic Viscosity (25°C)300~500 mm²/sGuoli Chemical Product Database Water DispersibilityEasily dispersible in waterGuoli Chemical Product Database Flash Point (Open Cup)>200°CGuoli Chemical Product Database Application Recommendations Addition Method: GP-330 is a liquid product and can be added directly or after pre-dilution. It is recommended to add it slowly while the system is being stirred to ensure uniform dispersion and optimal defoaming performance. For continuous production processes, quantitative continuous addition can be achieved using a metering pump. For batch production, a portion can be pre-added as a foam suppressant before foam generation, with additional product added when foam appears to break existing foam. According to the Guoli Chemical Product Database, the effective active content of this product is 20% to 100% (depending on the specification). Please confirm the specific specification when selecting the product. Recommended Dosage Reference: The Guoli Chemical Product Database does not provide a unified fixed dosage recommendation (actual dosage varies significantly depending on the formulation and process conditions). The following are typical industrial dosage ranges for reference during trial stages: Water-based coatings/adhesives: 0.1% to 0.5% of total formulation weight Water-based inks: 0.05% to 0.3% of total formulation weight Industrial water treatment: 0.01% to 0.1% of total system weight (approximately 10 to 100 ppm) Textile dyeing and finishing: 0.05% to 0.3% of working solution weight Papermaking process: 0.02% to 0.2% of pulp weight Metalworking fluids: 0.05% to 0.2% of working solution weight Industrial cleaning: 0.1% to 0.5% of cleaning solution weight It is recommended to start with a low dosage in new formulations or processes and conduct gradient experiments to gradually find the optimal balance between defoaming effect and cost efficiency. Excessive addition may cause turbidity or slight stratification in the system and should be avoided. Precautions Storage and pre-use inspection: The product should be stored at a temperature of 5°C to 35°C. Once opened, it should be used as soon as possible. If slight stratification or turbidity occurs after long-term storage, stir thoroughly before use; this does not affect the defoaming performance. Addition timing: It is recommended to add the product slowly while the system is being stirred to avoid local high concentration caused by one-time large addition, which may affect dispersion. Compatibility verification: When using the product for the first time in a new formulation system, it is recommended to conduct small-scale trials to verify compatibility, ensuring no defects such as cratering or fisheyes in the coating film before large-scale use. Safety operation: Wear chemical protective gloves and safety goggles during operation. Avoid contact with eyes and skin. The product is slightly toxic to aquatic organisms. Do not discharge untreated waste liquid directly into water bodies.

Question 9

What industries and processes is polyether defoamer GP-330 mainly used in?

Accepted Answer

Polyether defoamer GP-330 is a high-efficiency nonionic defoamer specially designed for water-based systems, widely used in eight major industries including coatings, adhesives, inks, water treatment, textile printing and dyeing, papermaking, metal processing, and industrial cleaning. Detailed Description Polyether defoamer GP-330 (chemical name: glycerol polypropylene ether, CAS number: 68439-50-9) is a nonionic surctant, appearing as a colorless to light yellow transparent viscous liquid. This product features rapid defoaming and long-lasting foam suppression as its core advantages, capable of quickly eliminating existing foam within a very short time and continuously preventing foam regeneration. It also exhibits excellent temperature resistance and chemical stability, reliably functioning in acidic, alkaline, and hard water environments. Its liquid form cilitates easy metering and addition, and it is highly compatible with various water-based resins, additives, and formulation systems, without easily causing defects such as craters or fish eyes in coatings. GP-330 is a versatile defoaming agent designed for water-based systems, covering a wide range of applications from coatings and printing to industrial circulating water treatment. It is particularly suitable for processes requiring both st defoaming speed and prolonged foam suppression. Application Fields IndustryTypical Process StageEffect Water-based CoatingsDispersion, mixing, coatingRapid bubble breaking, reducing coating craters and pinholes, improving surce quality AdhesivesStirring, applicationEliminate foam, prevent adhesive layer defects and strength reduction, ensure uniform bonding Water-based InksHigh-speed printingQuick deaeration, avoid ink misting and mottling, maintain image clarity and color saturation Industrial Water TreatmentAeration, circulating water systemsSuppress foam generation, reduce overflow risk, improve system efficiency Textile Printing and DyeingHigh-temperature, high-shear dyeing processingLong-lasting foam suppression, avoid color spots and stains, ensure bric level dyeing PapermakingPulping, papermakingControl foam, prevent paper defects and air spots, improve sheet formation and smoothness Metalworking FluidsCutting, grinding circulating systemsSuppress foam accumulation, enhance cooling and lubrication effects, improve machining precision Industrial CleaningCleaning bath solutionsReduce cleaning agent foaming, avoid foam overflowing the tank, ensure cleaning power Application Recommendations GP-330 is suitable for defoaming and foam suppression needs in various water-based systems. It is recommended to verify compatibility with the system and determine the optimal dosage through small-scale tests before use. Typically, it can be added during the material mixing stage or before the foam generation stage, allowing the system's own shear force to disperse it evenly. For high-temperature processes (e.g., textile printing and dyeing), this product maintains stable defoaming activity under high-temperature conditions without easy decomposition or ilure, making it an ideal high-temperature defoaming choice. Precautions The product should be stored sealed in a cool, dry, and well-ventilated place. The recommended storage temperature is 5°C to 35°C, away from direct sunlight and high-temperature environments. When handling, it is recommended to wear chemical safety goggles and impermeable gloves to avoid prolonged direct contact with skin and eyes. This product has low toxicity to aquatic organisms, but direct discharge into water bodies without treatment should still be avoided. Use promptly after opening; if not fully used, reseal and store properly.

Question 10

What are the physicochemical technical parameters of polyether defoamer GP-330?

Accepted Answer

Polyether defoamer GP-330 is a colorless to slightly yellowish transparent liquid, a nonionic surctant with core characteristics such as low HLB value, excellent defoaming and foam suppression performance, high temperature resistance, and strong chemical stability. Detailed Description Polyether defoamer GP-330, with the full chemical name C12-14 tty alcohol polyoxyethylene polyoxypropylene ether (CAS number: 68439-50-9), has a molecular weight of approximately 3000. The product appears as a colorless to slightly yellowish transparent viscous liquid, easily dispersible in water, and is specifically designed for water-based systems. Its nonionic nature enables it to maintain stable defoaming activity over a wide pH range and under hard water conditions, without easily reacting adversely with other components in the system. From a physicochemical perspective, GP-330 has an HLB value of only 1, a surce tension of approximately 30 mN/m, exhibiting strong lipophilicity and low foamability. It can rapidly break existing foam and persistently inhibit foam reformation. The freezing point is below -20°C, and the flash point exceeds 200°C, ensuring it does not decompose or lose efficacy even in high-temperature operating environments, offering high safety. The product is slightly hygroscopic, stable under typical alkaline conditions and hard water, demonstrating excellent formula compatibility. Technical Parameters Parameter NameTypical Value/Specification AppearanceColorless to slightly yellowish transparent liquid Ionic TypeNonionic Molecular FormulaRO(C₂H₄O)ₓ(C₃H₆O)ᵧH, R=C12-14 alkyl Molecular WeightApproximately 3000 Active Content20%~100% (depending on specification) HLB Value1 Cloud Point (1% aqueous dispersion)≤20°C pH Value (1% concentration)5.0~8.0 Density0.85~1.05 g/cm³ Kinematic Viscosity (25°C)300~500 mm²/s Low Shear Viscosity300~500 mPa·s Flash Point (Open Cup)>200°C Freezing Point Surce Tension (0.1% dispersion)Approximately 30 mN/m Refractive Index (20°C)1.450~1.455 Hydroxyl Value54.5~58.5 mgKOH/g Acid Value≤0.05 mgKOH/g Saponification Value≤0.5 mgKOH/g Iodine Value≤1 g I₂/100g Moisture Content≤0.05% Unsaturation≤0.04 mmol/g Free Alcohol (as glycerol)≤0.1% Heavy Metals (as Pb)≤10 mg/kg Arsenic (As)≤2 mg/kg Defoaming PerformanceLow foamability, excellent defoaming/foam suppression performance Chemical StabilityStable under normal temperature and pressure, avoid strong oxidants HygroscopicitySlightly hygroscopic Application Suggestions Based on the physicochemical properties mentioned above, GP-330 is particularly suitable for water-based systems that require rapid defoaming and have certain temperature requirements. Its low free alcohol content and strong chemical inertness make it perform excellently in areas such as waterborne coatings, textile printing and dyeing, industrial water treatment, papermaking, and metalworking fluids, without easily causing surce defects such as film craters or bric color spots. In practical use, it is recommended to gradually add 0.01%~0.3% of the total formula weight, depending on the foaming tendency and viscosity of the system, and fully disperse to achieve the optimal balance of foam suppression and foam breaking. For high-temperature (>50°C) or high-shear processes, the product can still maintain stable defoaming activity without needing additional dosage increments. Precautions The product is slightly hygroscopic; after opening, it should be sealed and stored promptly to avoid prolonged exposure to humid air. Storage temperature is recommended to be controlled between 5°C and 35°C, avoid freezing. If frozen, thaw and stir evenly before use; generally, it can be restored. The cloud point is low (≤20°C), which may cause dispersion turbidity in cold water systems; stirring can improve dispersion uniformity. Although the product itself is not flammable, it may produce irritating fumes when decomposed by high heat; good ventilation should be maintained during operation.

Polyether Defoamer GP-330

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Property	Value
CAS No.	68439-50-9
Molecular Formula	RO(C2H4O)x(C3H6O)yH, R=C12-14 alkyl
Appearance	Colorless to pale yellow viscous liquid
Ionic Type	Nonionic
Avg. Molecular Weight	~3000
Cloud Point	≤20°C (1%aq. dispersion)
Active Content	20%~100% (per specification)
pH Value(1%)	5.0~8.0
pH Value(5%)	N/A (poorly water-soluble)
Iodine Value	≤1 g I2/100g
Solubility	Dispersible in water
Surface Tension	~30 mN/m (0.1%dispersion)
Acid Value	≤0.05
Saponification Value	≤0.5
Hydroxyl Value	54.5~58.5
Moisture	≤0.05
Density	0.85~1.05
Kinematic Viscosity	300~500 mm²/s (25°C)
Refractive Index	1.450~1.455 (20°C)
Flash Point	>200°C (open cup)
Hygroscopicity	Slightly hygroscopic
Chemical Stability	Stable at room temperature; avoid strong oxidizers
Foam Property	Low foam with excellent defoaming/suppression
Alkali Resistance	Stable under normal alkaline conditions
Unsaturation	≤0.04 mmol/g
Viscosity	300-500 mPa·s (25°C)
Melting Point	<-20°C (freezing point)
Low Shear Viscosity	300~500 mPa·s
Solid Content	N/A (liquid product)
Free Alcohol	≤0.1% (based on glycerol)
Heavy Metal	≤10 mg/kg (as Pb)
Arsenic	≤2 mg/kg

Polyether Defoamer GP-330

Product Details

Applications

Properties

Safety

Product Overview

Performance Features

Packaging and Storage

Defoamer / Specialty Applications

Product Properties

Safety

GHS

Handling

Storage

First Aid

Related Products

Paper Defoamer XS-02, Polyether Ester Defoamer