Description

Siloxanes And Silicones, Di-Me, Me Hydrogen, Polymers With Me Silsesquioxanes is a specialized organosilicon copolymer that combines dimethylsiloxane, methylhydrogensiloxane, and methyl silsesquioxane structural units. This unique architecture provides a balance of reactivity, thermal stability, and compatibility, making it a valuable intermediate for advanced material synthesis. It is primarily sought by manufacturers in the silicone elastomer, release coating, and specialty resin industries seeking to enhance product performance through tailored cross-linking and reinforcement.

Application

• Cross-linking Agent for addition-cure silicone rubbers (High Consistency Rubber - HCR & Liquid Silicone Rubber - LSR).
• Key Intermediate in the formulation of high-performance silicone release coatings for labels and tapes.
• Reinforcing Modifier in silicone resins to improve thermal and mechanical properties.
• Hydrophobic Additive for surface treatments, coatings, and construction materials.
• Precursor for synthesizing silsesquioxane-containing hybrid polymers and nanocomposites.
• Adhesion Promoter component in sealants and encapsulants for electronics.

Basic Information

Product Name	Siloxanes And Silicones, Di-Me, Me Hydrogen, Polymers With Me Silsesquioxanes
CAS No.	68554-51-8
Molecular Formula	Not a single molecule; a copolymer mixture. Contact for details.
Molecular Weight	Varies by grade and polymerization degree.
Synonyms	Methylhydrogen-Dimethylsiloxane Copolymer with Methyl Silsesquioxane; Poly(dimethylsiloxane-co-methylhydrogensiloxane) grafted with poly(methylsilsesquioxane); Siloxane-silsesquioxane copolymer; Reactive silicone copolymer; Methylhydrogen Q-resin modified siloxane; PMHS-PMSSQ copolymer; Hydrogen-functional silicone polymer.
EINECS	Contact for details.

Quality Control

Our production of Siloxanes And Silicones, Di-Me, Me Hydrogen, Polymers With Me Silsesquioxanes adheres to a strict quality management system. Each batch is characterized for critical parameters including Si-H content, viscosity, and molecular weight distribution to ensure consistent performance as a reactive intermediate. Certificates of Analysis (COA) detailing these specifications are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry, well-ventilated area at room temperature (15-25°C/59-77°F). Keep containers tightly sealed under a dry, inert atmosphere (e.g., nitrogen) to prevent moisture absorption and premature reaction. Separate from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Viscosity @ 25°C	Grade dependent (e.g., 500 - 10,000 cSt)
Si-H Content	Grade dependent (Typical range: 0.1 - 1.0 wt%)
Non-volatile Content	> 98%
Water Content (KF)	< 200 ppm

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