Silicone resins

Details Silicone resins Silicone resins

2008-09-16

2008-09-16

Cameron, Erma (Department: 1792)

Coating processes

With post-treatment of coating or coating material

Heating or drying

C427S387000, C528S021000, C528S031000, C528S032000

Reexamination Certificate

active

10531163

ABSTRACT:
A silicone resin, curable to a resin of low coefficient of thermal expansion, high glass transition temperature and high modulus, has the empirical formulain-line-formulae description="In-line Formulae" end="lead"?(R3SiO1/2)a(R2SiO2/2)b(RSiO3/2)c(SiO4/2)din-line-formulae description="In-line Formulae" end="tail"?wherein each R is a hydrocarbon or substituted hydrocarbon group or a hydrogen atom; and a=0.02 to 0.8; b=0 to 0.4; and c+d=0.2 to 0.98, where a+b+c+d=1.0, characterized in that at least 2 mole % of the siloxane units in the resin are of the formula R′SiO1/2, RR′2SiO1/2or R′2SiO2/2, wherein each R′ is an alkenyl group.

REFERENCES:
patent: 5116637 (1992-05-01), Baney et al.
patent: 5446087 (1995-08-01), Chizat et al.
patent: 5468828 (1995-11-01), Hurford et al.
patent: 5777047 (1998-07-01), Chung et al.
patent: 5977226 (1999-11-01), Dent et al.
patent: 6124407 (2000-09-01), Lee et al.
patent: 2002/0142174 (2002-10-01), Kropp et al.
patent: WO 02/081552 (2002-10-01), None

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