Core/shell particles and process for making same

Details Core/shell particles and process for making same Core/shell particles and process for making same

1991-01-25

1991-10-01

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524458, 525309, 525310, 525902, 428407, C08F25702, C08F27902, C09D15106

Patent

active

050534416

ABSTRACT:
A core/shell polymer is capable of increasing a composition's whiteness of opacity. The shell polymer has either a crystalline structure of a T.sub.g of at least about 50.degree. C. The shell polymer comprises (i) at least one nonionic monomer selected from the group consisting of soft alkyl acrylate monomers, soft methacrylate ester monomers, and mixtures thereof, and (ii) at least one additional nonionic monomer. The core has a different composition than the composition of the shell and a T.sub.g of at least about 50.degree. C. The core comprises alkenyl aromatic monomers. The core and shell polymers are homopolymers or copolymers.

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