Description

Methylhydrosiloxane - Dimethylsiloxane Copolymer, Hydride Terminated is a reactive organosilicon polymer featuring active Si-H bonds along its backbone and chain ends. This unique structure makes it a versatile cross-linking agent and modifier, essential for creating durable, high-performance silicone materials. It is a critical raw material for manufacturers in the silicone rubber, adhesives, and coatings industries seeking to enhance product properties like thermal stability, adhesion, and mechanical strength.

Application

• Cross-linking Agent for Silicone Elastomers: Used in addition-cure (platinum-catalyzed) systems to produce high-strength, heat-cured silicone rubbers for gaskets, seals, and medical devices.
• Adhesion Promoter: Enhances the bonding of silicone-based adhesives and sealants to various substrates, including metals, glass, and plastics.
• Intermediate for Silicone Resins & Coatings: Serves as a key building block in the synthesis of silicone resins used in high-temperature, release, and protective coatings.
• Surface Modification: Used to impart hydrophobic or release properties to surfaces of textiles, paper, and fillers via hydrosilylation reactions.
• Foam Control Agent: Acts as an intermediate in the production of silicone-based antifoams and defoamers for industrial processes.
• Fabrication of LED Encapsulants: Employed in the formulation of optically clear, durable silicone gels and encapsulants for LED packaging.

Basic Information

Product Name	Methylhydrosiloxane - Dimethylsiloxane Copolymer, Hydride Terminated
CAS No.	69013-23-6
Molecular Formula	(C2H6OSi)m(C3H8OSi)n
Molecular Weight	Variable (based on m/n ratio)
Synonyms	Hydride-Terminated Methylhydrosiloxane-Dimethylsiloxane Copolymer; Poly(methylhydro-dimethyl)siloxane, hydride terminated; Methyl Hydrogen Siloxane-Dimethyl Siloxane Copolymer; Si-H Functional Siloxane Copolymer; Reactive Silicone Hydride Fluid; PMHS-DMS Copolymer; Crosslinker MH 15; Hydrosiloxane Polymer
EINECS	Contact for details

Quality Control

Our Methylhydrosiloxane - Dimethylsiloxane Copolymer is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including determination of active hydrogen content (Si-H), viscosity, and refractive index, to ensure consistent performance and purity. Comprehensive Certificates of Analysis (COA) documenting all 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, and well-ventilated area at room temperature (15-25°C). This product is easily oxidized; for long-term storage, maintaining an inert atmosphere (nitrogen or argon) in the headspace of the container is strongly recommended to preserve reactivity. 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
Active Hydrogen Content (Si-H)	0.5 - 1.5 % (w/w) *
Viscosity @ 25°C	10 - 1000 cSt *
Refractive Index @ 25°C	1.400 - 1.410
Specific Gravity @ 25°C	0.95 - 1.00

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

* Typical range. Exact values depend on the specific copolymer ratio and molecular weight.