Thermally stable ethylene/acid copolymers

Details Thermally stable ethylene/acid copolymers Thermally stable ethylene/acid copolymers

Filed on

1997-01-09

Date issued

1998-03-03

Examiner

Zitomer, Fred

Patent Class

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

SubClass

Synthetic resins

SubSubClass

Polymers from only ethylenic monomers or processes of...

Other Related Categories

526266, 526271, 5263184, 5263186, 5263488, C08F22206

Type

Patent

Status

active

Patent number

057235570

Description

ABSTRACT:
Ethylene/(meth)acrylic acid copolymers which have improved melt-thermal stability are described. The copolymers contain an intrachain anhydride unit derived from an additional comonomer which is an anhydride or anhydride forming comonomer, such as maleic anhydride and maleic acid or its monomethyl ester, present at a level of 0.05 to 3.0 weight percent. Measured properties of the terpolymers, other than thermal stability, are about the same as comparable ethylene/(meth)acrylic acid copolymers with no anhydride monomer.

REFERENCES:
patent: 3264272 (1966-08-01), Rees
patent: 4351931 (1982-09-01), Armitage
patent: 4690981 (1987-09-01), Statz
patent: 5276135 (1994-01-01), Powell

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