Polyester resin granules and process

Details Polyester resin granules and process Polyester resin granules and process

1980-12-01

1982-03-23

Schofer, Joseph L.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525 19, 525 18, 525 17, 525 15, 525 13, 523505, 521 62, C12P 3304

Patent

active

043213324

ABSTRACT:
This invention relates to 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. Previously-known processes for the preparation of granules of this type have utilized polyamines; this has led to odor and color problems. These problems may be eliminated or substantially reduced by the use of bases which are metal oxides, hydroxides or salts wherein the metal cation is selected from Ca, Mg, Ba, Ti, Zn, Pb, Sr and Co and, when a metal salt is used, the pKa value of the conjugate acid of the anion is greater than 2. The resulting granules are useful at matting and opacifying agents in, for example, paint compositions.

REFERENCES:
patent: Re27444 (1972-07-01), Will
patent: 3879314 (1975-04-01), Gunning et al.

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