Room-temperature-curable organopolysiloxane composition

Details Room-temperature-curable organopolysiloxane composition Room-temperature-curable organopolysiloxane composition

2007-06-20

2009-06-23

Peng, Kuo-Liang (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

C524S403000, C524S588000, C528S901000

Reexamination Certificate

active

07550548

ABSTRACT:
A room-temperature-curable organopolysiloxane composition comprising:(A) 100 parts by weight of an organopolysiloxane having a viscosity of from 100 to 500,000 mPa·s at 25° C. and having in one molecule 1.5 or more end groups represented by the general formula:in-line-formulae description="In-line Formulae" end="lead"?(X)aR13-aSi—, wherein-line-formulae description="In-line Formulae" end="tail"?each X is independently a hydroxyl group or a hydrolyzable group,each R1is independently a monovalent hydrocarbon group or a halogen-substituted monovalent hydrocarbon group, anda is 1, 2, or 3;(B) 0.01 to 40 parts by weight of a cross-linking agent selected from a silane or a siloxane oligomer wherethe cross-linking agent has three or more silicon-bonded hydrolyzable groups per molecule; and(C) microparticles of thermoplastic resin containing a platinum compound in such an amount that the content of metallic platinum in component (C) is within the range of 0.01 to 5 wt. %, wherethe microparticles have an average diameter from 0.1 to 20 μm,component (C) is present in an amount sufficient to provide 1 to 2,000 ppm of metallic platinum in the composition; and(D) 5 to 300 parts by weight of an inorganic powder.

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