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US 5,177,177 AGranted
Amorphous copolyamide from dimer acid, aromatic dicarboxylic acid and cycloaliphatic diamine
AssigneeEMS-Inventa AG
InventorsHelmut Thullen, Eduard Schmid
Life of this patent
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Abstract
Rigid, amorphous copolyamides, which can be produced in a single-stage polycondensation reaction, having a high glass transition temperature and low water absorption capacity, consisting essentially of cycloaliphatic diamines, dimerized fatty acids, and aromatic dicarboxylic acids, and a method for the manufacture thereof.
Claims14
An amorphous copolyamide of a monomer mixture consisting essentially of
- a) 50 mol % of at least one cycloaliphatic diamine of Formula I ##STR2## wherein R is an alkyl radical containing from 1 to 10 carbon atoms, R.sup.1 is hydrogen or an alkyl radical containing 1 to 4 carbon atoms, and x is 0 to 4;
- b) 5 to 25 mol % of a dimerized fatty acid;
- c) 25 to 45 mol % of at least one aromatic dicarboxlic acid;
- and
- d) 0 to 50% by weight, based on the total amount of a), b), and c), of further polyamide-forming monomers.
2 more elements
Dependencies are inferred from the claim text.