Thermoplastic molding compositions which are mixtures of amorphous and semi-crystalline polyamides, a method of preparation thereof and products made therefrom
First Claim
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1. A thermoplastic molding composition comprisinga) 25-75 parts of a semicrystalline polyamide;
- b) 75-25 parts of an amorphous copolyamide of(i) 25-45 molar parts of at least one aromatic dicarboxylic acid,(ii) 25-5 molar parts of at least one dimerized fatty acid,(iii) 50 molar parts of at least one cycloaliphatic diamine, the sum of the acid groups of acids (i) and (ii) substantially equaling the sum of the amine groups of amine (iii);
c) 0-30 parts of a compatibility agent,a), b) and c) totaling 100 parts.
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Abstract
Thermoplastic molding compositions including a semicrystalline polyamide a) and an amorphous copolyamide b), the latter containing dimerized fatty acid as one monomer building block. Optionally, a compatibility agent and other additives are also included.
The molding compounds having high stiffness up to at least 100° C. are produced by melt-mixing components a) and b), and optionally a compatibilizer, and are used for making molded parts which are outstanding in their thermal properties, high solvent resistance, and resistance to stress corrosion.
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Citations
29 Claims
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1. A thermoplastic molding composition comprising
a) 25-75 parts of a semicrystalline polyamide; -
b) 75-25 parts of an amorphous copolyamide of (i) 25-45 molar parts of at least one aromatic dicarboxylic acid, (ii) 25-5 molar parts of at least one dimerized fatty acid, (iii) 50 molar parts of at least one cycloaliphatic diamine, the sum of the acid groups of acids (i) and (ii) substantially equaling the sum of the amine groups of amine (iii); c) 0-30 parts of a compatibility agent, a), b) and c) totaling 100 parts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification