Appeal No. 95-3933
Application No. 08/063,206
present application, has been allowed by the examiner. Claim 1
is illustrative:
1. A method of making a vinylether functional siloxane, the
method comprising the steps of:
(I) reacting:
(a) a silane having the formula R Si(OR ) ;1
x 4-x
(b) water; and
(c) an acidic condensation catalyst, wherein R is a
monovalent hydrocarbon or halohydrocarbon radical having from 1
to 20 carbon atoms, R is a monovalent alkyl radical having from1
1 to 8 carbon atoms, x has a value of from 0 to 3, with the
proviso that the molar ratio of water to alkoxy radicals is less
than 0.5;
(II) removing alcohol from the reaction mixture of (I);
(III) neutralizing the mixture of (II);
(IV) adding a vinyl ether compound having the formula
2 2
HOR OCH=CH wherein R is a divalent hydrocarbon or
2
halohydrocarbon radical having from 1 to 20 carbon atoms to the
mixture of (III);
(V) adding a transesterification catalyst to the mixture of
(IV);
(VI) removing volatiles from the mixture of (V).
The examiner relies upon the following references as
evidence of obviousness:
Burzynski et al. (Burzynski) 4,539,232 Sep. 3, 1985
Brown et al. (Brown) 5,270,423 Dec. 14, 1993
(filed Nov. 13, 1992)
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