Description

Dimethylsiloxane, Propylene Oxide/Ethylene Oxide Block Copolymer is a versatile silicone-polyether hybrid surfactant, known by the CAS number 68937-55-3. This copolymer is engineered to combine the unique surface-modifying properties of silicone with the hydrophilic character and solubility of polyethers, creating a powerful wetting and leveling agent. It is essential for formulators in the coatings, personal care, and polyurethane foam industries who require superior performance in challenging applications.

Application

• Coatings & Inks: Acts as a highly effective flow and leveling agent, wetting agent, and defoamer in water-based and solvent-based systems, improving substrate wetting and eliminating surface defects.
• Polyurethane Foam Production: Serves as a critical cell opener and stabilizer in flexible slabstock foam formulations, ensuring uniform cell structure and preventing shrinkage.
• Personal Care & Cosmetics: Used in hair conditioners, skin creams, and antiperspirants for its emollient properties, soft feel, and ability to improve spreadability and texture.
• Agriculture: Functions as a super-spreading adjuvant in pesticide and herbicide formulations, enhancing droplet coverage and adhesion on waxy or hard-to-wet plant surfaces.
• Textile & Leather Processing: Employed as a softener, lubricant, and anti-foam agent in various finishing and dyeing baths.
• Industrial Cleaners: Enhances the wetting and penetrating power of cleaning solutions for hard surfaces.

Basic Information

Product Name	Dimethylsiloxane, Propylene Oxide/Ethylene Oxide Block Copolymer
CAS No.	68937-55-3
Molecular Formula	Contact for details
Molecular Weight	Variable (Polymer)
Synonyms	Silicone Polyether Copolymer; Silicone Glycol Copolymer; Polyether-modified Silicone; Polysiloxane-polyoxyalkylene Copolymer; Dimethylsiloxane-(ethylene oxide/propylene oxide) Copolymer; EO/PO Modified Silicone; Surfactant SAG; ABIL B 8843 (Trade Name); Dow Corning 190 (Trade Name)
EINECS	Contact for details

Quality Control

Our Dimethylsiloxane, Propylene Oxide/Ethylene Oxide Block Copolymer is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent performance, including measurement of key parameters such as viscosity, cloud point, and silicone content. Certificates of Analysis (COA) documenting these specifications are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. Under these conditions, the product has a typical shelf life of 24 months from the date of manufacture.

Specification

Item	Specification
Appearance	Clear to slightly hazy liquid
Color (Gardner)	≤ 3
Viscosity @ 25°C	100 - 5000 cSt (Grade Dependent)
Specific Gravity @ 25°C	0.95 - 1.05
Cloud Point (1% in water)	Variable (Grade Dependent)
Water Content (Karl Fischer)	≤ 0.5%
Silicone Content	Variable (Grade Dependent)

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.