Gelest (Mitsubishi Chemical) Solutions for Adhesives and Sealants

Established in 1991 and now a core research and manufacturing excellence center of Mitsubishi Chemical Group, Gelest, Inc. spearheads advanced materials development in the polymer science arena. Gelest offers a portfolio of specialty silicones, organosilanes, metal-organics, and acrylate monomers designed to enhance adhesion, curing, dispersion, and surface compatibility. As part of Mitsubishi Chemical’s “KAITEKI” philosophy, Gelest aligns innovation with sustainability and societal well-being, offering technical support and expertise to accelerate commercialization of next-gen materials.

HMS-301

HMS-301 by Gelest (Mitsubishi Chemical) is 25-35% (methylhydrosiloxane) 65-70% (dimethylsiloxane) copolymer. Acts as crosslinking agent for vinyl-addition silicones. This trimethylsiloxy terminated hydride functional polymer undergoes three main classes of reactivity: hydrosilylation, dehydrogenative coupling and hydride transfer.<br> <ul style="padding-left: 40px;"><li>HMS-301 has more readily controlled reactivity than the homopolymers which results in tougher polymers with lower cross-link density.</li> <li>The preferred catalysts for the reactions are platinum complexes such as SIP6830.3 and SIP6832.2.</li> <li>In principle, the reaction of hydride functional siloxanes with vinyl functional siloxanes takes place at 1:1 stoichiometry.</li> <li>Used in encapsulant applications.</li></ul>

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HMS-064

HMS-064 by Gelest (Mitsubishi Chemical) acts as crosslinking agent for vinyl-addition silicones. This trimethylsiloxy terminated hydride functional polymer undergoes three main classes of reactivity: hydrosilylation, dehydrogenative coupling and hydride transfer. It has more readily controlled reactivity than the homopolymers which results in tougher polymers with lower cross-link density. The preferred catalysts for the reactions are platinum complexes such as SIP6830.3 and SIP6832.2. In principle, the reaction of hydride functional siloxanes with vinyl functional siloxanes takes place at 1:1 stoichiometry. HMS-064 is used in encapsulant applications.