Polychloroprene powders

Details Polychloroprene powders Polychloroprene powders

1977-05-20

1978-07-04

Levin, Stanford M.

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

Synthetic resins

Treating polymer containing material or treating a solid...

260 4247, 528487, C08F 622

Patent

active

040989895

ABSTRACT:
An improvement in the process of producing free-flowing polychloroprene powder wherein the spent coagulant solution is removed prior to adjusting the pH of the coagulated latex with a base, thereby reducing the amount of base required and wherein it has been found that an emulsifer which is stable in solutions, having a pH of less than 4.5, such as an alkali or alkaline earth of the condensate of formaldehyde and naphthalene sulfonic acid, added to the latex before or after the coagulant solution is mixed therewith, prevents agglomeration of the coagulated latex when the base solution is added.

REFERENCES:
patent: 2671075 (1954-03-01), Hempel
patent: 3392134 (1968-07-01), Apotheker
patent: 3558576 (1976-01-01), Weller
patent: 3761455 (1973-09-01), Tanara et al.

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