Polymeric opaque particles and process for making same
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United States of America Patent
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Jun 25, 1991
Grant Date -
N/A
app pub date -
Sep 23, 1988
filing date -
Sep 23, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A core/shell polymer is capable of increasing a composition's whiteness or opacity. The core and shell polymers have either a crystalline structure or have a T.sub.g of at least about 50.degree. C. The core polymer has a different composition than the composition of the shell polymer. The core polymer comprises vinylidene halide monomers and/or vinyl halide monomers. The core and shell polymers are either homopolymers or copolymers.
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