Silicone gel composition that yields cured product having...

Details Silicone gel composition that yields cured product having... Silicone gel composition that yields cured product having...

2008-09-19

2010-12-14

Gulakowski, Randy (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...

C525S475000

Reexamination Certificate

active

07851563

ABSTRACT:
The invention provides a silicone gel composition comprising:(A) an organopolysiloxane represented by an average composition formula (1) shown below:in-line-formulae description="In-line Formulae" end="lead"?RaR1bSiO(4-a-b)/2  (1)in-line-formulae description="In-line Formulae" end="tail"?(wherein, R represents an alkenyl group, R1represents a monovalent hydrocarbon group that contains no aliphatic unsaturated bonds, and a, b and a+b are numbers that satisfy specific numerical ranges), and containing at least one alkenyl group bonded to a silicon atom within each molecule,(B) a component composed of:(B-1) an organohydrogenpolysiloxane represented by an average composition formula (2) shown below:in-line-formulae description="In-line Formulae" end="lead"?(HR22SiO1/2)c(R32SiO)d(R4SiO3/2)e  (2)in-line-formulae description="In-line Formulae" end="tail"?(wherein, R2, R3and R4represent monovalent hydrocarbon groups that contain no aliphatic unsaturated bonds, and c, d and e are numbers that satisfy specific numerical ranges, provided that c+d+e=1), containing at least three hydrogen atoms bonded to silicon atoms within each molecule, and containing at least two (R4SiO3/2) units within each molecule, and(B-2) an organohydrogenpolysiloxane represented by an average composition formula (3) shown below:in-line-formulae description="In-line Formulae" end="lead"?R5fHgSiO(4-f-g)/2  (3)in-line-formulae description="In-line Formulae" end="tail"?(wherein, R5represents a monovalent hydrocarbon group that contains no aliphatic unsaturated bonds, and f, g and f+g are numbers that satisfy specific numerical ranges), containing either one or two hydrogen atoms bonded to silicon atoms within each molecule, and containing either one or two hydrogen atoms bonded to silicon atoms at molecular chain terminals.

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Machine Translation of JP 06-345971 A.

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