Description

Hydride Terminated Polydimethylsiloxane is a reactive silicone polymer featuring active Si-H bonds at its chain ends, which serve as versatile sites for cross-linking and functionalization. This unique chemical structure makes it a critical intermediate for synthesizing specialty silicone materials with tailored properties. It is essential for manufacturers in the silicone elastomer, adhesive, sealant, and coating industries seeking to enhance product performance through precise molecular engineering.

Application

• Cross-linking Agent for Silicone Elastomers: Acts as a key reactive component in addition-cure (hydrosilylation) systems to produce high-performance HTV (High-Temperature Vulcanizing) and RTV (Room-Temperature Vulcanizing) silicone rubbers.
• Intermediate for Silicone Modification: Used to graft organic functional groups onto silicone backbones, creating hybrid materials like polyether-modified or alkyl-modified silicones for surfactants and release agents.
• Adhesive & Sealant Formulations: Provides excellent adhesion promotion and moisture resistance in specialty construction and industrial sealants.
• Surface Treatment & Coupling Agent: Imparts hydrophobic and release properties to surfaces; used as a primer or treatment for fillers, glass, and minerals to improve compatibility in composite materials.
• Silicone Resin Synthesis: Serves as a building block for creating branched and network silicone resins with high thermal stability for protective coatings and electrical insulation.
• Personal Care & Cosmetic Ingredients: Used in the synthesis of silicone derivatives that provide emolliency, gloss, and conditioning in hair and skin care products.

Basic Information

Product Name	Hydride Terminated Polydimethylsiloxane
CAS No.	70900-21-9
Molecular Formula	(C2H6OSi)n•C4H12Si2 (Representative)
Molecular Weight	Varies by chain length (n)
Synonyms	Hydride-terminated PDMS; Poly(dimethylsiloxane), hydride terminated; Si-H Terminated Polydimethylsiloxane; Polymethylhydrosiloxane (terminated); Hydrogen-terminated Polydimethylsiloxane; Hydrosiloxane Polymer; PMHS (Hydride Terminated); Reactive Silicone Hydride Fluid
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 catalyst residues. Certificates of Analysis (COA) detailing key 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, well-ventilated area at room temperature (15-25°C). The product is moisture-sensitive; keep containers tightly sealed to prevent contact with atmospheric moisture. Store away from strong oxidizing agents and bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Active Hydrogen Content (Si-H Value)	As per grade (e.g., 0.1% - 1.6% H)
Viscosity (25°C)	10 - 10,000 cSt (Grade dependent)
Specific Gravity (25°C)	0.96 - 1.00
Refractive Index (n20D)	1.400 - 1.410
Volatile Content	< 1.0%
Identification (IR)	Conforms

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