Appeal No. 1996-2336
Application 08/270,345
claims 1-3 and 6-19 as amended after final rejection. These
are all of the claims remaining in the application.
THE INVENTION
Appellants claim methods for producing polysiloxane
emulsions from a mixture containing cyclicsiloxanes. The
emulsions are oil free, i.e., do not contain any unemulsified
silicone material and do not produce unemulsified silicone oil
or polymers upon aging (specification, page 9, lines 4-8).
Claim 1 is illustrative and reads as follows:
1. A method for producing stable, oil free polysiloxane
emulsions comprising the steps of:
(I) preparing a mixture comprising
(a) a cyclicsiloxane, or a mixture of
cyclicsiloxanes,
(b) a nonionic surfactant, or a mixture of nonionic
surfactants,
(c) an ionic surfactant, or a mixture of ionic
surfactants,
(d) water, and
(e) a condensation polymerization catalyst;
wherein said cyclicsiloxane or mixture of cyclic siloxanes
have not been mechanically pre-emulsified prior to addition
into the mixture (I)
(II) thereafter heating and agitating the mixture (I) at
2
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