Process for the thermal after-treatment of paste-forming polymer

Details Process for the thermal after-treatment of paste-forming polymer Process for the thermal after-treatment of paste-forming polymer

1981-09-16

1983-06-21

Henderson, C. A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

526344, 528502, C08F 614

Patent

active

043895220

ABSTRACT:
In a process for the thermal after-treatment of paste-forming homo- or copolymers of vinyl chloride, obtained by aqueous emulsion polymerization, followed by spray-drying to produce a spray-dried powder, an improvement is provided wherein 20 to 60 percent by weight of the spray-dried powder is warmed for 1 second to 30 minutes to a treating temperature of 75.degree.-110.degree. C., and then is recombined with the non heat-treated, 80-40 percent by weight portion of the powder.

REFERENCES:
patent: 4133947 (1979-01-01), Kalka
patent: 4207412 (1980-06-01), Kalka
R.G.C., vol. 40, No. 10, 1963, p. 1467, J. Delorme.

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