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US 5,288,799 AGranted
Thermoplastic molding compositions which are mixtures of amorphous and semi-crystalline polyamides, a method of preparation thereof and products made therefrom
AssigneeEMS-Inventa AG
InventorsEduard Schmid, Helmuth Thullen
Life of this patent
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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.degree. 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.
Claims29
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.
4 more elements
Dependencies are inferred from the claim text.