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US 5,296,550 AGranted
Impact modified polyester blends with improved polymer compatibility
AssigneeEnichem S.p.A.
InventorsKavilipalayam M. Natarajan, Palanisamy Arjunan, David Elwood
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Abstract
A moldable polyblend of thermoplastic polyesters, one or more polymers selected from polyamides, polyolefins and mixtures thereof, and ethylene copolymers containing epoxy groups. The ethylene copolymers contribute improved compatibility between the thermoplastic polyesters and the polyamides or polyolefins, permitting the blending of these polymers without detracting from the mechanical or thermal properties of the individual polymers.
Claims38
A thermoplastic molding composition comprising:
- a first polymer comprising a thermoplastic polyester;
- one or more second polymers suitable for use in thermoplastic molding compositions and selected from the group consisting of polyamides, polyolefins and mixtures thereof;
- and
- an ethylene copolymer containing epoxy groups represented by the formula:
- X/Y/Z
- wherein
- X is a monomeric unit formed from ethylene and comprises from about 50 to about 95 weight percent of said copolymer;
- Y is a monomeric unit formed from a monomer selected from the group consisting of vinyl acetate and acrylate monomers having the structure:
- ##STR4## in which R.sub.1 is selected from the group consisting of alkyl and cycloalkyl groups containing from about 1 to about 12 carbon atoms and phenyl and alkylphenyl groups, the alkyl portion of which contains from about 1 to about 12 carbon atoms;
- R.sub.2 is selected from the group consisting of hydrogen, methyl and ethyl;
- and Y comprises from about 4 to about 35 weight percent of said copolymer;
- and
- Z is a monomeric unit formed from a monomer containing an epoxy group selected from the group consisting of glycidyl acrylate and glycidyl methacrylate, wherein Z comprises from about 1 to about 15 weight percent of said copolymer.
10 more elements
A method of producing a molded polyblend which comprises:
- (a) forming a thermoplastic polyblend comprising a first polymer comprising a thermoplastic polyester,
- one or more second polymers suitable for use in thermoplastic polyblends and selected from the group consisting of polyamides, polyolefins and mixtures thereof, and
- an ethylene copolymer containing epoxy groups having the formula:
- X/Y/Z
- wherein
- X is a monomeric unit formed from ethylene comprising from about 50 to about 95 weight percent of said copolymer;
- and
- Y is a monomeric unit formed from a monomer selected from the group consisting of vinyl acetate and an acrylate monomer having the structure:
- ##STR6## in which R.sub.1 is selected from the group consisting of alkyl and cycloalkyl groups containing from about 1 to about 12 carbon atoms and phenyl and alkylphenyl groups, the alkyl portion of which contains from about 1 to about 12 carbon atoms;
- R.sub.2 is selected from the group consisting of hydrogen, methyl and ethyl;
- and wherein Y comprises from about 4 to about 35 weight percent of said copolymer;
- and
- Z is a monomeric unit formed from a monomer selected from the group consisting of glycidyl acrylate and glycidyl methacrylate, comprising from about 1 to about 15 weight percent of said copolymer;
- and
- (b) molding said polyblend.
12 more elements
Dependencies are inferred from the claim text.