Description

Vinylmethylsiloxane Homopolymer is a reactive silicone polymer featuring vinyl and methyl functional groups along its siloxane backbone. This unique structure provides a versatile platform for cross-linking and modification, making it a critical intermediate in the synthesis of high-performance silicone materials. It is essential for manufacturers in the silicone elastomer, adhesive, sealant, and specialty coatings industries seeking to enhance product durability, thermal stability, and chemical resistance.

Application

• Silicone Rubber & Elastomers: Acts as a key reactive intermediate or cross-linking agent in the production of high-consistency rubber (HCR) and liquid silicone rubber (LSR) for automotive, medical, and industrial parts.
• Adhesives & Sealants: Used in formulating addition-cure silicone adhesives and sealants that require excellent weatherability, flexibility, and bond strength.
• Release Coatings: Serves as a base polymer for platinum-catalyzed, solventless release coatings applied to papers and films.
• Silicone Resins & Modifiers: Employed in the synthesis of silicone resins for high-temperature paints, electrical insulation, and as a modifier for organic polymers to improve surface properties.
• Personal Care & Cosmetics: Utilized in the manufacture of silicone gums and fluids that provide a silky, non-greasy feel in skincare and haircare formulations.
• Fabric & Textile Treatment: Imparts durable water repellency (DWR) and softness to technical textiles and fabrics.

Basic Information

Product Name	Vinylmethylsiloxane Homopolymer
CAS No.	68037-87-6
Molecular Formula	(C5H12OSi)n • (C2H6OSi)m
Molecular Weight	Varies by chain length (n, m)
Synonyms	Poly(methylvinylsiloxane); Methylvinylsiloxane Homopolymer; Vinylmethyl Polysiloxane; PMVS; Poly(dimethylsiloxane-co-methylvinylsiloxane); Vinyl-terminated Polydimethylsiloxane (with vinyl side groups); Vinyl Q resin intermediate; Methylvinyl silicone fluid
EINECS	Contact for details

Quality Control

Our Vinylmethylsiloxane Homopolymer is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including determination of vinyl content, viscosity, molecular weight distribution, and purity, to ensure consistency and performance. Certificates of Analysis (COA) detailing all specifications are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flame. This material is incompatible with strong acids and organic solvents; store separately from such materials to prevent contamination or reaction.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Viscosity @ 25°C	Grade dependent (e.g., 100 - 100,000 cSt)
Vinyl Content (mol%)	Grade dependent (e.g., 0.1 - 10%)
Specific Gravity @ 25°C	0.96 - 0.98
Refractive Index @ 25°C	1.400 - 1.410
Volatile Content	< 1.0%

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