Continuous process for the preparation of nonrandom ethylene/aci

Details Continuous process for the preparation of nonrandom ethylene/aci Continuous process for the preparation of nonrandom ethylene/aci

1979-04-05

1981-02-24

Kight, III, John

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

Synthetic resins

Polymerizing in two or more physically distinct zones

525327, 525328, 525360, 525366, 526 73, 526317, 526318, C08F 202, C08F26502, C08F26702, C08F 844

Patent

active

042529247

ABSTRACT:
There is provided a continuous, steady state process for the preparation of nonrandom ethylene/.alpha.,.beta.-ethylenically unsaturated carboxylic acid copolymers in at least 2 constant environment, stirred autoclaves in series wherein the first autoclave is maintained at the pressure in the range of 800 to 3000 atmospheres (11.8 to 44.1 kpsi) and at a temperature in the range of 120.degree. to 200.degree. C. in a single phase reaction mixture at the given concentration of copolymer in the reaction mixture and at the given acid comonomer content of the copolymer and wherein each succeeding autoclave is maintained at a temperature of at least 30.degree. C. in excess of the preceding autoclave. The compolymers thus obtained have a ratio of percent adjacent acid to weight percent acid in the copolymer of from above 0.44 to about 1.0. These copolymers have improved stiffness and are particularly useful in sheeting, blow molding, and packaging applications and for conversion to ionomers which are also useful for similar applications.

REFERENCES:
patent: 3264272 (1966-10-01), Rees
patent: 3325460 (1967-06-01), Schellenberg et al.
patent: 3520861 (1970-07-01), Thomson et al.
patent: 4016342 (1977-04-01), Wagensommer
patent: 4042766 (1977-08-01), Tatsukami et al.
patent: 4042768 (1977-08-01), Muller et al.
patent: 4061847 (1977-12-01), Hughes et al.

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