Synthetic core-shell particle resin emulsion, process for produc

Details Synthetic core-shell particle resin emulsion, process for produc Synthetic core-shell particle resin emulsion, process for produc

1990-10-26

1993-06-01

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525301, 525308, 5253306, 525902, C08F 614

Patent

active

052160440

ABSTRACT:
A synthetic resin emulsion whose polymer particles are solid core-shell particles in which form pores spontaneously upon drying is produced by the steps of preparing as core particles from 2 to 60 parts by weight of polymer (A) by emulsion polymerization of from 10 to 80 parts by weight of acrylate ester (a.sub.1) having an alkyl group of from 1 to 3 carbon atoms and from 90 to 20 parts by weight another of vinyl-type monomer (a.sub.2) copolymerizable therewith, forming a shell of a polymer (B) on the surface of the core particles of polymer (A) by emulsion polymerization in the presence thereof of from 98 to 40 parts by weight of vinyl-type monomer (b), different from polymer (a.sub.1) and successively hydrolyzing the core portion of the particles with an alkaline material. Organic pigments prepared from the synthetic resin emulsion can improve the hiding power, brightness, gloss and other properties of articles coated therewith.

REFERENCES:
patent: 4427836 (1984-01-01), Kowalski et al.
patent: 4469825 (1984-09-01), Kowalski et al.
patent: 4594363 (1986-06-01), Blankenship
patent: 4876313 (1989-10-01), Lorah
patent: 5041464 (1991-08-01), Hoshino et al.
Abstract of JP 61-62510.
Abstract of JP 59-59741.
Chemical Abstracts, vol. 101, No. 10, Sep. 1984.
Database WPIL No. 89-253384.

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