Appeal No. 95-4033
Application 07/669,125
wherein each R is a vinyl radical or a monovalent hydrocarbon radical free of aliphatic1
unsaturation and containing no more than six carbon atoms, the ratio of R SiO units to 1
3 1/2
SiO units from about 0.5:1 to about 1.5:1, the resin having a vinyl content of from about 1.5
4/2
to about 3.5% by weight;
(B) a hydrogen-containing polysiloxane having an average unit formula
(II)
R H SiO2 ,
a b (4-a-b)/2
wherein R is a monovalent hydrocarbon radical or halogenated monovalent hydrocarbon2
radical having from 1 to about 10 carbon atoms and free of aliphatic unsaturation, “a” is a value
of from about 0 to about 3, “b” is a value of from about 0 to about 3, and the sum of “a” + “b”
is from 0 to 3, there being at least two silicon-bonded hydrogen atoms per molecule; the
polysiloxane being present in an amount sufficient to provide a molar ratio of silicon-bonded
hydrogen atoms in (B) to olefinically unsaturated radicals in (A) of from about 0.75:1 to about
25:1;
(C) a catalytic amount of a hydrosilation catalyst;
(D) an effective amount of an adhesion promoter selected from the group
consisting of
(i) bis[3-(trimethoxysilyl)alkyl]fumarates having the general formula:
(III)
O
1
HC $$$$$$$$ C $$$$$$$ O $$$$$$$$ R 3 $$$$$$$$ Si(OR ) 4 3
O
1 4
4 $$$$$$$$$ 3 $$$$$$$$$ $$$$$$$$$ $$$$$$$$$
(R O) Si R O C CH
3
3
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Last modified: November 3, 2007