Description

Vinyl Terminated Polydimethylsiloxane is a reactive silicone polymer featuring vinyl (ethenyl) functional groups at the chain termini. This molecular architecture is critical for enabling cross-linking reactions via hydrosilylation or platinum-catalyzed addition, forming durable, flexible silicone networks. It is an essential intermediate for manufacturers requiring customizable elastomers, sealants, and release coatings with specific mechanical and surface properties. Key industries that rely on this material include advanced adhesives, high-performance rubber, and electronics encapsulation.

Application

• Silicone Rubber & Elastomers: Acts as a primary reactive component in High Consistency Rubber (HCR) and Liquid Silicone Rubber (LSR) formulations for automotive, medical, and consumer goods.
• Release Coatings & Liners: Used in the production of pressure-sensitive adhesive (PSA) release liners for labels, tapes, and graphic films.
• Adhesives & Sealants: Serves as a base polymer in addition-cure silicone adhesives and sealants, offering excellent weatherability and thermal stability.
• Electronics Potting & Encapsulation: Provides protective, flexible encapsulation for sensitive electronic components due to its excellent dielectric properties and thermal shock resistance.
• Mold Making: Utilized in two-part silicone mold making kits for casting resins, plastics, and low-melt metals in prototyping and art applications.
• Textile & Fiber Coatings: Imparts durable water repellency, softness, and breathability to technical textiles and fibers.
• Personal Care & Cosmetics: Used in specialty formulations for hair care and skincare products to modify texture and provide film-forming properties.
• Modifying Additive: Functions as a reactive modifier in organic polymer systems to improve flexibility, impact resistance, and surface characteristics.

Basic Information

Item	Details
Product Name	Vinyl Terminated Polydimethylsiloxane
CAS No.	68083-19-2
Molecular Formula	(C2H6OSi)n • C4H10Si
Molecular Weight	Variable (Depends on chain length 'n')
Synonyms	Vinyl-terminated PDMS; Poly(dimethylsiloxane), vinyl-terminated; Vinylmethylsiloxane-dimethylsiloxane copolymer, vinyl terminated; α,ω-Divinylpolydimethylsiloxane; Divinyl-terminated polydimethylsiloxane; Vinyl silicone fluid; Reactive vinyl silicone oil; Vinyldimethylsiloxy-terminated polydimethylsiloxane
EINECS	Contact for details

Quality Control

Our Vinyl Terminated Polydimethylsiloxane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency in key parameters such as vinyl content, viscosity, molecular weight distribution, and purity. Certificates of Analysis (COA) documenting these specifications are available upon request. Our production adheres to relevant industry standards, and we can support compliance requirements for specific applications.

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. Incompatible with strong acids and organic solvents. For long-term storage, consider using an inert gas blanket (e.g., nitrogen) to minimize potential oxidation or moisture uptake.

Specification

Item	Specification
Appearance	Clear, colorless viscous liquid
Identification (IR)	Conforms to structure
Viscosity (25°C)	Specified grade (e.g., 100 - 1,000,000 cSt)
Vinyl Content (mmol/g)	0.05 - 0.50 (Grade dependent)
Specific Gravity (25°C)	0.96 - 0.98
Refractive Index (n20D)	1.400 - 1.410
Volatile Content (%)	≤ 1.0
Acidity (as HCl)	≤ 0.001%

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