Process for making dispersion copolymers through monomer meterin

Details Process for making dispersion copolymers through monomer meterin Process for making dispersion copolymers through monomer meterin

1981-09-14

1983-02-01

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526212, 526317, 5263294, 526 87, C08K 505

Patent

active

043716776

ABSTRACT:
The present invention relates to a process for producing low energy dispersion vinyl copolymers which, in a plastisol, can be fused at lower temperatures or in a shorter period of time than presently available dispersion vinyl copolymers. It has been found that if, instead of adding all the comonomer batchwise prior to the start of the reaction, the comonomer, such as methyl acrylate, for example, is metered into the reactor continuously, or intermittently, during all or part of the polymerization reaction period, a dispersion vinyl copolymer is produced that has a lower plastisol viscosity for a given comonomer content. Plastisols made from the vinyl copolymers of the present invention have good flow properties and the fused films made therefrom have high gloss, high clarity and good mechanical strength, even when fused at low temperatures.

REFERENCES:
patent: 2628957 (1953-02-01), Tucker
patent: 3293199 (1966-12-01), Abercrombie
patent: 3637620 (1972-01-01), Patron et al.
patent: 3671508 (1972-01-01), Koyanagi et al.
patent: 4071675 (1978-01-01), Yu et al.
patent: 4076920 (1978-02-01), Mikofalvy et al.

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