Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2006-05-02
2006-05-02
Cain, Edward J. (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S543000, C524S832000, C524S833000, C524S834000
Reexamination Certificate
active
07037975
ABSTRACT:
The invention provides a process for preparing aqueous polymer dispersions having a high solids content of more than 60% by polymerizing one or more ethylenically unsaturated monomers by means of free-radically initiated aqueous emulsion polymerization in the presence of from 0.1 to 5.0% by weight of emulsifier, based on the overall weight of the monomers, and in the presence of initiator, wherein the emulsifier in an amount of from 0.001 to 0.5% by weight, based on the overall weight of the water in the initial charge, is included in the initial charge together with a fraction of from 1 to 10% by weight of the monomers, based on the overall weight of the monomers, before the beginning of polymerization, and the remainder of emulsifier and the remainder of monomers are metered in after the beginning of polymerization.
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Brooks & Kushman P.C.
Cain Edward J.
Wacker Chemie AG
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