Continuous process for preparing polyester copolymer resin

Details Continuous process for preparing polyester copolymer resin Continuous process for preparing polyester copolymer resin

1996-11-06

1999-04-06

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528190, 528193, 528194, 528271, 528272, 528499, 528501, C08G 6400

Patent

active

058919821

ABSTRACT:
The present invention relates to a process for preparing a dispersion of high grade polyester copolymer resin in water comprising 1) combining a crude polyester copolymer resin, having particles of various sizes, with water; 2) heating and agitating the resin/water mixture; 3) cooling the mixture; 4) continuously filtering the mixture to remove the largest size resin particles; 5) allowing the mixture to stand undisturbed so that any undispersed particles settle out as a sediment; and 6) removing the sediment, leaving a dispersion of the smallest resin particles in water. By using a plurality of filters and sequentially finer filter mesh sizes, a high grade product is attained.

REFERENCES:
patent: 4943602 (1990-07-01), Brueckmann et al.

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