Process of preparing vesiculated polyester granules

Details Process of preparing vesiculated polyester granules Process of preparing vesiculated polyester granules

1983-08-10

1984-11-20

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 64, 521138, 523336, 523337, 523502, 523505, C08V 928

Patent

active

044839456

ABSTRACT:
A process of preparing aqueous slurries of vesiculated granules of crosslinked polyester resin wherein the granules have a maximum shrinkage on drying of 5% of the granule diameter.
The formation of aggregates of granules in the large scale production of granules using a metal oxide, hydroxide or weak acid salt as base can be overcome by using a surfactant which comprises a species ##STR1## wherein a=5-12, X is an anion of pK.sub.1 less than 2 and R is an alkylene oxide chain composed of units selected from ethylene, propylene and butylene oxides. When alkylene oxide other than ethylene oxide is present in the chain, such alkylene oxide must not provide more than two units per chain and the chain must additionally comprise at least three ethylene oxide units.
The granules prepared by the process are useful as matting and opacifying agents in, for example, coating compositions.

REFERENCES:
patent: 3822224 (1974-07-01), Gillam et al.
patent: 3879314 (1975-04-01), Gunning
patent: 3923704 (1975-12-01), Gunning
patent: 4321332 (1982-03-01), Beresford et al.

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