Color stabilization of vinyl chloride resins

Details Color stabilization of vinyl chloride resins Color stabilization of vinyl chloride resins

1977-04-06

1979-02-13

Henderson, C. A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

526 51, 526 57, 528486, 528487, 528491, 528494, C08F 624

Patent

active

041396979

ABSTRACT:
The discoloration that vinyl chloride resins usually undergo when a slurry containing one of these resins is heated at a temperature above 70.degree. C. to reduce its monomer content to less than 10 ppm is minimized or prevented by carrying out the heating step in the presence of a monomer-miscible color stabilizer that comprises an organic peroxide and/or an organic azo compound.

REFERENCES:
patent: 2432448 (1947-12-01), Richards
patent: 3077371 (1963-02-01), Schoeneberg
patent: 3397033 (1968-08-01), Ney
patent: 3600366 (1971-08-01), Heckert
patent: 3697495 (1972-10-01), Bristol
patent: 3892719 (1975-07-01), Matsumura

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