Polyester granules and process

Details Polyester granules and process Polyester granules and process

1974-12-17

1979-01-30

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 63, 521 69, 521 88, 521117, 521138, 521140, C08J 928

Patent

active

041373804

ABSTRACT:
Aqueous slurries of vesiculated cross-linked polyester resin granules which show a shrinkage of less than 5% on drying are prepared by a double-emulsion process in the presence of polyamine having a pKa value of 8.5-10.5 at a concentration of 0.3 to 1.4 amine groups per carboxyl group of the polyester, the acid value of which is limited to 10-45 mgm KOH per gm.
The granules are of particular use as opacifying matting agents in latex paints and avoid the defect observed hitherto of cracking at high film builds.

REFERENCES:
patent: RE27444 (1972-02-01), Will
patent: 3244772 (1966-04-01), Von Bonin et al.
patent: 3255127 (1966-06-01), Von Bonin et al.
patent: 3442842 (1969-05-01), Von Bonin
patent: 3666697 (1972-05-01), Peloza
patent: 3669911 (1972-06-01), Najvar
patent: 3740255 (1973-06-01), Fox
patent: 3740353 (1973-06-01), Patrick et al.

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