Description

Methylhydrosiloxane - Octylmethylsiloxane Copolymer is a specialized organosilicon compound engineered to deliver unique surface-modifying and release properties. This copolymer is valued for its ability to impart excellent slip, lubricity, and water repellency to a wide range of industrial formulations. It is a critical performance additive for manufacturers in the personal care, coatings, plastics, and textile industries seeking to enhance product functionality and processing. The material is supplied under strict quality control to ensure batch-to-batch consistency for demanding applications.

Application

• Personal Care & Cosmetics: Acts as an emollient and conditioning agent in hair care products (shampoos, conditioners) and skin care formulations (lotions, creams) to provide a smooth, non-greasy feel and improve spreadability.
• Release Agents & Mold Lubricants: Used in rubber, plastic, and polyurethane processing to prevent sticking and facilitate easy demolding, improving production efficiency and part quality.
• Coatings & Inks: Functions as a flow and leveling additive, slip agent, and mar-resistance aid to improve the surface properties and durability of industrial and decorative coatings.
• Textile & Fiber Treatment: Imparts durable water repellency (DWR), softness, and lubricity to synthetic and natural fibers, enhancing fabric performance and handle.
• Plastics & Elastomers: Serves as an internal lubricant and processing aid to reduce viscosity, prevent die buildup, and improve surface finish in extruded or molded parts.
• Adhesives & Sealants: Modifies surface energy to improve wetting on low-energy substrates or to act as a non-stick additive in pressure-sensitive adhesive systems.

Basic Information

Product Name	Methylhydrosiloxane - Octylmethylsiloxane Copolymer
CAS No.	68554-69-8
Molecular Formula	(C8H18OSi)x(C2H8OSi)y
Molecular Weight	Variable (Copolymer)
Synonyms	Octylmethylsiloxane-Dimethylsiloxane Copolymer; Poly[dimethylsiloxane-co-methyl(octyl)siloxane]; Silicone Copolymer Fluid; Octyl Methyl Silicone; Methyl Octyl Siloxane Copolymer; Organomodified Siloxane; Poly(dimethylsiloxane-co-methyloctylsiloxane)
EINECS	Contact for details

Quality Control

Our Methylhydrosiloxane - Octylmethylsiloxane Copolymer is manufactured under a rigorous quality management system. Each production batch is analyzed against strict internal specifications to ensure consistent performance, purity, and viscosity. Key parameters such as silicon-bonded hydrogen content, octyl content, and molecular weight distribution are monitored. A Certificate of Analysis (COA) documenting these results is available for every shipment upon request.

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 heat, sparks, and open flame. Under recommended storage conditions, the product is stable for at least 24 months from the date of manufacture.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Identification (IR)	Complies
Viscosity @ 25°C	100 - 5000 cSt (Grade Dependent)
Specific Gravity @ 25°C	0.90 - 1.00
Refractive Index @ 25°C	1.400 - 1.450
Active Hydrogen Content	0.1 - 1.0 % (Grade Dependent)
Water Content	≤ 0.1 %

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