Stabilized copolymers of ethylene with ethylenically unsaturated

Details Stabilized copolymers of ethylene with ethylenically unsaturated Stabilized copolymers of ethylene with ethylenically unsaturated

1993-01-11

1994-01-04

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528499, C08F 600

Patent

active

052761355

ABSTRACT:
The viscosity stability of a copolymer of ethylene with at least one comonomer which is an ethylenically unsaturated carboxylic acid is improved by exposing the isolated copolymer to moisture for a sufficient period to cause the copolymer to retain at least 20 weight percent more water than it would retain if it were purged with air or nitrogen heated to a temperature at least 5.degree. C. above ambient, which air or nitrogen has not been humidified after it has been heated to such temperature.

REFERENCES:
patent: 3226459 (1965-12-01), Tijunelis
patent: 4156075 (1979-05-01), Holliday et al.
patent: 4372758 (1983-02-01), Bobst et al.
patent: 4528151 (1985-07-01), Matsuo et al.
patent: 4594382 (1986-06-01), Hoenig et al.
patent: 4730035 (1988-03-01), Mark et al.
patent: 5071950 (1991-12-01), Borho et al.

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