Appeal 2007-1693
Application 10/343,523
BRIEF STATEMENT OF THE INVENTION
Appellants’ invention is directed to a process for preparing
polyacrylates by free radical addition polymerization. According to
Appellants, the polymers prepared by the claimed invention can be used in
pressure sensitive adhesives (Specification, 5:20-28). Appealed claim 1, as
presented in the Brief, is reproduced below:
1. A process for preparing pressure-sensitively adhesive polyacrylates
by free radical addition polymerization of a monomer mixture comprising
acrylate or methacrylate acid esters, wherein mercapto-functionalized
photoinitiators of the formula (I)
H-S-R (I)
are added to the monomer mixture to be polymerized or to a polymerization
reaction mixture comprising the monomer mixture, R being chosen from the
following groups:
a) benzophenone, acetophenone, benzil, benzoin, hydroxyalkylphenone,
phenylcyclohexyl ketone, anthraquinone, thiaxanthone, triazine, or
fluorenone radicals, each of which are optionally substituted by one or more
halogen atoms, or one or more alkoxy groups, or one or more amino groups,
or hydroxyl groups, or a combination thereof,
b) radicals which comprise one or more radicals of the substituted or
unsubstituted groups specified under a) in their structure, and the reaction
mixture is polymerized by free-radical addition polymerization to form a
pofyacylate.
The prior art relied upon by the Examiner in rejecting the claims on
appeal is:
Rehmer US 5,180,756 Jan. 19, 1993
Asakura WO 99/62961 A1 Dec. 9, 1999
.
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