Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1994-09-06
1995-06-13
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
524 46, 525477, 525479, 525100, 525106, C08G 7738
Patent
active
054243742
ABSTRACT:
Heat curable organopolysiloxane compositions of this invention comprise (A) organopolysiloxanes with at least two alkenyl groups within the molecule, (B) capsules containing organo hydrogen polysiloxanes which comprise (B-1) organo hydrogen polysiloxanes with at least two hydrogen atoms which are bound to silicon atoms within the molecule and (B-2) a thermoplastic resin having a softening point or glass transition temperature in the range from 40.degree. to 200.degree. C., wherein the component (B-1) forms a single nucleus or multiple nuclei and the component (B-2) is a wall material, and (C) platinum group metallic catalysts. The said compositions contain a crosslinking agent which is encapsulated with thermoplastic resins, therefore they possess a superior stability during room temperature storage for a long time period, and the heating of the compositions forms a rapid and uniform crosslinking to prepare the cured products.
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Marquis Melvyn I.
Shin-Etsu Chemical Co. , Ltd.
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