Nonrandom copolymers of ethylene and unsaturated acid

Details Nonrandom copolymers of ethylene and unsaturated acid Nonrandom copolymers of ethylene and unsaturated acid

1979-04-05

1981-02-03

Kight, III, John

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

525360, 525366, 525367, 525369, 526318, C08F 202, C08F 844, C08F22006, C08F22202

Patent

active

042489903

ABSTRACT:
Compositionally uniform but nonrandom copolymers of ethylene and .alpha.,.beta.-ethylenically unsaturated carboxylic acids having from 3 to 8 carbon atoms are provided having an acid content of from about 6 to about 35 weight percent, a melt index of from about 0.1 to about 800, and a ratio of weight percent adjacent acid to weight percent total acid in the copolymer of from about 0.44 to about 1.0. These copolymers have improved physical properties such as hardness, stiffness, heat resistance and creep resistance. Further provided, is a process for preparing these copolymers in a constant environment stirred autoclave in a continuous manner wherein the reaction zone is maintained in a steady state at a pressure of from 0 to about 500 psi above, and at a temperature of from 0.degree. to about 15.degree. C. above that needed to maintain a single phase reaction mixture at a given concentration of copolymer and at the given acid comonomer content of the copolymer.

REFERENCES:
patent: 3264272 (1966-10-01), Rees
patent: 3472825 (1969-10-01), Walter et al.
patent: 3520861 (1970-07-01), Thomson et al.
patent: 4042766 (1977-08-01), Tatsukami et al.
patent: 4061847 (1977-12-01), Hughes et al.

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