The use of Oleic Acid Polyoxyethylene Ester A-105 (OEO-105) depends on the specific application scenario. It is typically added directly to the formulation as an emulsifier, wetting agent, or dispersant, with a recommended dosage of 1% to 10% of the total formulation.
Detailed Description
Oleic Acid Polyoxyethylene Ester A-105 (OEO-105) is a nonionic surfactant that is easily soluble in water, with an HLB value of 10.5 (source: Guoli Chemical Product Database). Its usage method is flexible, with the core aim being uniform dispersion in the system to fully exert its interfacial activity. In most applications, the product can be added directly to the aqueous or oil phase, but it is generally recommended to add it slowly under stirring to facilitate rapid dispersion and dissolution. For formulations requiring stable emulsions, methods such as "agent in oil" or "agent in water" can be used, where A-105 is first dissolved in the oil or water phase, and then the other phase is slowly added under high-speed stirring (e.g., 1000-3000 rpm) to obtain emulsions with fine particle size and high stability.
Since A-105 may appear as a paste at low temperatures, if the product thickens or solidifies before use, it can be preheated in an environment of 25-40°C or using a warm water bath to restore its fluid state, but direct heating with an open flame is strictly prohibited. In compounded systems, A-105 has good compatibility with anionic, cationic, and other nonionic surfactants. The optimal synergistic ratio can be determined through orthogonal experiments to reduce the total amount of surfactants used and improve product performance.
Technical Parameters
The following are key technical indicators of Oleic Acid Polyoxyethylene Ester A-105 (OEO-105) for reference in formulation design (source: Guoli Chemical Product Database):
| Parameter Name | Specification Indicator |
|---|
| Appearance | Light yellow to yellow liquid or paste |
| Ionic Type | Nonionic |
| HLB Value | 10.5 |
| Active Content | ≥99% |
| pH Value (1% Aqueous Solution) | 5.0~7.0 |
| Cloud Point (1% Aqueous Solution) | 72~76℃ |
| Acid Value | ≤5 mgKOH/g |
| Saponification Value | 75~85 mgKOH/g |
| Hydroxyl Value | 82±3 mgKOH/g |
| Moisture | ≤1.0% |
| Surface Tension (1% Aqueous Solution) | 30~32 mN/m |
| Critical Micelle Concentration (CMC) | 0.02~0.03 g/L |
| Density (20℃) | 0.98~1.02 g/cm³ |
| Kinematic Viscosity (40℃) | 100~200 mm²/s |
| Alkali Resistance Stability | Not alkali resistant |
| Foam Characteristics | Low foaming |
Application Recommendations
The following are specific usage methods and recommended dosages of A-105 in different fields (source: Guoli Chemical Application Database):
- Textile Printing and Dyeing Auxiliaries: When used as a pretreatment scouring agent or penetrant, the recommended dosage is 0.5~2 g/L of the working solution, with optimal effectiveness at 40~60°C. When used as a leveling agent, it can be compounded with anionic dispersants at a dosage of 5%~15% of the dye weight.
- Metalworking Fluids: In emulsified oil formulations, A-105 often serves as the primary emulsifier, with a recommended addition of 5%~15% of the total formulation. When preparing, first mix A-105 evenly with the base oil, then slowly add water under stirring to form a stable emulsion.
- Pesticide Emulsifiers: When used to prepare pesticide emulsifiable concentrates (EC), the addition amount is usually 6%~12% of the total formulation, and it should be compounded with anionic emulsifiers (such as calcium salts) to achieve optimal emulsification dispersibility and cold/hot storage stability.
- Industrial Cleaners: In neutral to acidic cleaning formulations, the recommended dosage is 2%~8%. Due to its low foaming and hard water resistance, it is particularly suitable for high-pressure spray cleaning and cleaning of metal parts.
- Leather Degreasing Agents: As the main degreasing component, the recommended dosage is 0.2%~0.5% of the aqueous solution weight, used in combination with a small amount of soda ash or low-concentration alkaline salts, but note that A-105 itself is not resistant to strong alkalis.
- Cosmetics: In leave-on products such as creams and lotions, the recommended addition amount is 1%~5%, which can be added to either the water phase or oil phase, and homogenized and emulsified at 60~75°C to form a fine, stable cream.
Precautions
- Operational Safety: A-105 is slightly irritating to skin and eyes. When handling, wear nitrile or neoprene rubber gloves and chemical safety goggles to avoid prolonged direct contact. In case of contact, flush immediately with plenty of water for at least 15 minutes.
- Temperature Control: Do not preheat the product above 40°C, as high temperatures can cause discoloration. When used in formulations, maintaining a temperature below its cloud point (72-76°C) ensures optimal interfacial activity.
- Storage Conditions: Store sealed in a cool, dry, and well-ventilated place, away from heat sources and strong oxidizers. After opening the packaging, seal it promptly to prevent moisture absorption. Recommended storage temperature does not exceed 40°C.
- Incompatibilities: A-105 is not resistant to strong alkalis. In alkaline environments, the ester bonds will gradually hydrolyze and lose efficacy. It is recommended to use under neutral or weakly acidic conditions. Packaging and containers should be made of stainless steel, polyethylene, etc., and avoid prolonged contact with copper or aluminum.
- Environmental Disposal: Although the product is biodegradable, waste liquid and cleaning wastewater after use should be collected and disposed of by a qualified agency, and should not be discharged directly into water bodies.
