Process for producing homo- or copolymers of vinyl or vinylidene

Details Process for producing homo- or copolymers of vinyl or vinylidene Process for producing homo- or copolymers of vinyl or vinylidene

1979-11-13

1981-05-26

Wong, Jr., Harry

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

Synthetic resins

Polymerizing in reactor of specified material, or in reactor...

526343, 526344, C08F 200, C08F 1406, C08F 1408

Patent

active

042699541

ABSTRACT:
There is disclosed a process for preparing vinyl dispersion resins by conducting the polymerization reaction of the vinyl monomer or monomers in an aqueous medium using a low water solubility free radical yielding polymerization initiator or catalyst along with an inorganic or organic activator, using a fast reaction at the beginning of polymerization by employing a temperature below the desired temperature, then at the desired temperature and finally above the desired temperature, using an emulsifier system of an ammonium or an alkali metal salt of a high fatty acid containing from 8 to 20 carbon atoms, and/or a sulfate or sulfonate type soap, and at least one long straight chain alcohol containing from 12 to 24 carbon atoms, and conducting said polymerization in a reactor having a coating on the inner surfaces thereof comprising a polymerization inhibitor, the ingredients being thoroughly mixed prior to polymerization. Polymer buildup on the internal surfaces of the reactor is substantially reduced.

REFERENCES:
patent: 3669946 (1972-06-01), Koyanagi et al.
patent: 3778423 (1973-12-01), Reiter
patent: 4049894 (1977-09-01), Backderf

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