Description

Hydride Terminated Polydimethylsiloxane is a reactive silicone polymer featuring active Si-H (silane) groups at its molecular chain ends. This unique structure makes it a critical cross-linking agent and intermediate in the synthesis of specialty silicone materials, offering superior control over network formation and final product properties. It is essential for manufacturers in the silicone rubber, adhesives, coatings, and electronics industries seeking to enhance material performance through precise chemical modification.

Application

• Cross-linking Agent for Silicone Elastomers: Primary component in addition-cure (hydrosilylation) systems for producing high-strength, heat-cured silicone rubbers (HTV & LSR).
• Silicone Resin & Gel Synthesis: Key intermediate for building branched and networked silicone structures used in encapsulants, potting compounds, and protective coatings.
• Surface Modification & Coupling Agent: Used to impart hydrophobic properties or create reactive sites on inorganic fillers (e.g., silica) and various substrates.
• Adhesive & Sealant Formulations: Provides moisture-curing functionality in one-part RTV (Room Temperature Vulcanizing) adhesives and sealants.
• Release Coatings & Paper Treatment: Serves as a reactive precursor in the production of durable, non-stick silicone release liners.
• Electronics Potting & Encapsulation: Used in formulations that require stable, protective gels for sensitive electronic components.
• Personal Care & Cosmetic Ingredients: Intermediate in the synthesis of silicone copolymers used as emollients and conditioning agents.
• Specialty Chemical Intermediate: Building block for creating custom silicone polymers with tailored properties for advanced material science applications.

Basic Information

Product Name	Hydride Terminated Polydimethylsiloxane
CAS No.	115254-29-0
Molecular Formula	(C2H6OSi)n•C4H12Si2 (Representative)
Molecular Weight	Varies by chain length (n). Contact for details on specific viscosity grades.
Synonyms	α,ω-Dihydrogenpolydimethylsiloxane; Poly(dimethylsiloxane), hydride terminated; Hydride-terminated PDMS; Si-H Terminated PDMS; Polymethylhydrosiloxane (terminology overlap); Hydrogen-terminated polydimethylsiloxane; Hydrosiloxane polymer; Reactive silicone fluid; PMHS (in specific contexts); Crosslinker 110; H-PDMS.
EINECS	Contact for details.

Quality Control

Our Hydride Terminated Polydimethylsiloxane is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent active hydrogen content (Si-H value), viscosity, purity, and absence of critical impurities. Certificates of Analysis (COA) detailing specifications such as hydride content (by titration), volatile content, and refractive index 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, well-ventilated place at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and easily oxidized; it is recommended to store under an inert atmosphere (e.g., nitrogen or argon) for long-term stability. Keep away from heat, sparks, open flames, and incompatible materials such as strong oxidizers and bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Active Hydrogen Content (Si-H)	Specified range (e.g., 0.1% - 1.5% H, wt.)
Viscosity (25°C)	10 - 10,000 cSt (Grade dependent)
Specific Gravity (25°C)	0.96 - 0.98
Refractive Index (n20D)	1.400 - 1.410
Volatile Content	< 1.0%
Chloride (Cl)	< 10 ppm

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