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US 4,307,227 AGranted
Ester-modified polyamides
AssigneeBayer Aktiengesellschaft
InventorsRolf-Volker Meyer, Gerhard Hohmann, Hans Rudolph, Rolf Dhein, Manfred Dollhausen
Life of this patent
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Abstract
Ester-modified polyamides containing of from 50 to 80% by weight of --HN--(CH.sub.2).sub.5 --CO units are obtained by reaction of .gamma.-caprolactam and mixtures of dicarboxylic acids, primary diamines and polyalkylene glycols and are suitable inter alia as hot melt adhesives and for the elastification of thermoplastic materials.
Claims7
A fusible ester-modified polyamide containing at least 50% by weight of --HN--(CH.sub.2).sub.5 --CO-- units, said polyamide being derived from
- (I) 50 to 80% by weight of .epsilon.-caprolactam, and
- (II) 20 to 50% by weight of a mixture of
- (a) one equivalent of at least one C.sub.6 -C.sub.10 dicarboxylic acid
- (b) from 0.5 to 0.9 equivalents of at least one member selected from the group consisting of primary aliphatic and cycloaliphatic C.sub.6 -C.sub.25 diamines and
- (c) from 0.1 to 0.5 equivalents of at least one polyalkylene glycol having a molecular weight of from 200 to 1,000,
- the sum of (I) and (II) being 100% by weight and the sum of (b) and (c) being from 0.95 to 1.05 equivalents.
3 more elements
Dependencies are inferred from the claim text.