Curable organopolysiloxane composition

Details Curable organopolysiloxane composition Curable organopolysiloxane composition

2005-06-07

2010-06-22

Zimmer, Marc S (Department: 1796)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S478000, C524S267000, C524S268000, C524S430000, C524S588000, C528S015000, C528S031000, C528S032000

Reexamination Certificate

active

07741412

ABSTRACT:
A curable organopolysiloxane composition is provided, which includes (A) an organopolysiloxane containing at least one silicon atom-bonded alkenyl group within each molecule, (B) an organohydrogenpolysiloxane, which contains, within each molecule, at least one silicon atom-bonded hydrogen atom at a molecular chain terminal, and at least two silicon atom-bonded hydrogen atoms at non-terminal positions within the molecular chain, and which satisfies the formula shown below:in-line-formulae description="In-line Formulae" end="lead"?0<α/β0.25in-line-formulae description="In-line Formulae" end="tail"?(wherein, α represents the number of silicon atom-bonded hydrogen atoms at non-terminal positions within the molecular chain, and β represents the total number of silicon atoms within the component (B)), in sufficient quantity to provide from 0.1 to 5 silicon atom-bonded hydrogen atoms per silicon atom-bonded alkenyl group within the component (A), and (C) a platinum-based catalyst. The composition can be cured even at low temperatures, generates a cured product that suffers no surface wrinkling, and displays excellent storage characteristics.

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U.S. Appl. No. 12/233,781, filed Sep. 19, 2008, Tanaka, et al.

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