Thermoplastic molding compositions having improved _flexibility and cold impact strength based upon polyamides from _omega-aminocarboxylic acids and/or lactams having at least 10 carbon atoms

Claim 1

Thermoplastic molding compositions having improved flexibility and cold impact strength, comprising a mixture of: I. at least one polyamide homopolymer from omega-aminocarboxylic acids or lactams having at least 10 carbon atoms; and II. at least one polyether ester amide copolymer with units of the starting components randomly distributed in the polymer chain produced from: (a) omega-aminocarboxylic acid or lactams having at least 10 carbon atoms, (b) alpha, omega-dihydroxy(polytetrahydrofuran) having a molecular weight of between 160 and 3,000, and (c) a dicarboxylic acid, wherein said mixture contains about 95 to 20 percent by weight of component I and about 5 to 80 percent by weight of component II.

Claim 4

A method for the production of thermoplastic molding compositions having improved flexibility and cold impact strength, comprising mixing: I. about 95 to 20 percent by weight of at least one polyamide homopolymer from omega-aminocarboxylic acids or lactams having at least 10 carbon atoms; and II. about 5 to 80 percent by weight of at least one polyether ester amide copolymer with units of the starting components randomly distributed in the polymer chain, prepared by: (A) heating at a temperature of about 230°-300° C. a mixture of: (a) at least one polyamide forming compound selected from the group consisting of omega-aminocarboxylic acids having at least 10 carbon atoms, lactams having at least 10 carbon atoms, or omega-aminocarboxylic acids and lactams having at least 10 carbon atoms; (b) an alpha, omega-dihydroxy-(polytetrahydrofuran) having an average degree of polymerization of between about 2 and 42 or a molecular weight of between 150 and 3,000; and (c) at least one organic dicarboxylic acid; in a weight ratio of (a) to [(b)+(c)] of between 30:70 and 98:2, wherein hydroxy and carboxy groups in components (b) and (c) are present in equivalent amounts, in the presence of about 2-30% by weight of water, based on the polyamide-forming compounds of group (a) under the internal pressure developed in a closed container and condensing a product; (B) removing the water from the condensing stage (A); and (C) completely condensing the product in a second condensing stage with the exclusion of oxygen under normal pressure or under reduced pressure at about 250°-280° C.

Claim 5

A method for the production of thermoplastic molding compositions having improved flexibility and cold impact strength, comprising mixing: I. about 95 to 20 percent by weight of at least one polyamide homopolymer from omega-aminocarboxylic acids or lactams having at least 10 carbon atoms; and II. about 5 to 80 percent by weight of at least one polyether ester amide copolymer with units of the starting components randomly distributed in the polymer chain, prepared by: (A) heating at a temperature of about 230°-300° C. a mixture of: (a) at least one polyamide forming compound selected from the group consisting of omega-aminocarboxylic acids having at least 10 carbon atoms, lactams having at least 10 carbon atoms, or omega-aminocarboxylic acids and lactams having at least 10 carbon atoms; (b) an alpha, omega-dihydroxy-(polytetrahydrofuran) having an average degree of polymerization of between about 2 and 42 or a molecular weight of between 150 and 3,000; and (c) at least one organic dicarboxylic acid; in a weight ratio of (a) to [(b)+(c)] of between 30:70 and 98:2, wherein hydroxy and carboxy groups in components (b) and (c) are present in equivalent amounts, in the presence of about 2-30% by weight of water, based on the polyamide-forming compounds of group (a) under the internal pressure developed in a closed container and condensing a product; (B) removing the water from the condensing stage (A); and (C) completely condensing the product in a second condensing stage with the exclusion of oxygen under normal pressure or under reduced pressure at about 250°-280° C.