Claims
- 1. A monolayer film with low permeability to gases, comprising a blend of:
- (A) a melt-processibly polyolefin;
- (B) a gas barrier resin; and
- (C) a polyolefin-acrylic graft copolymer compatibilizer for the barrier resin and polyolefin;
- in which the graft copolymer compatibilizer comprises:
- (a) a non-polar polyolefin trunk selected from the group consisting of polyethylene, polypropylene, polybutylene, poly(4- methylpentene), copolymers of said olefins with each other, and one or more copolymers of said olefins with minor amounts of 1-alkenes, vinyl esters, vinyl chloride, methacrylic ester, and methacrylic acid, said trunk having a molecular weight of between about 50,000 and about 1,000,000; and
- (b) at least one methacrylate chain grafted with a covalent bond to said trunk, having a weight ratio with said trunk of from about 1:9 to 4:1, said chain being a polymer derived from at least about 80% of a monomer of methacrylic ester of the formula CH.sub.2 .dbd.C(CH.sub.3)COOR, which R is alkyl, aryl, substituted alkyl, substituted aryl, or substituted alkaryl, and less than about 20% of an acrylic or styrenic monomer copolymerizable with the methacrylic ester, said chain having a molecular weight of from about 20,000 to about 200,000.
Parent Case Info
This application is a continuation of application Ser. No. 687,642, filed Apr. 19, 1991 now abandoned which is a divisional of application Ser. No. 413,943, filed Sep. 28, 1989, is now U.S. Pat. No. 5,035,933, which is a continuation-in-part of U.S. Ser. No. 07/315,501, now U.S. Pat. No. 4,957,974, filed Mar. 1, 1989, the disclosure of which is incorporated by reference herein.
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Divisions (1)
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Date |
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Parent |
413943 |
Sep 1989 |
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Continuations (1)
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687642 |
Apr 1991 |
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Continuation in Parts (1)
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315501 |
Mar 1989 |
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