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US 4,393,192 AGranted
Crystalline copolymers prepared from N,N'-terephthaloyldi-beta-alanine and a glycol
AssigneeThe Standard Oil Company
InventorsBenedict S. Curatolo, Gerald P. Coffey
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Abstract
Novel water insoluble polyamide esters are prepared from dicarboxylic acid diamide derivatives of terephthalic acid and a glycol. In one embodiment, nearly perfectly alternating polyamide esters are prepared in the presence of antimony (III) acetate.
Claims18
Novel water insoluble polyamide esters of the general formula:
- ##STR6## where each R and R' independently are a divalent aliphatic, alicyclic or aromatic radical;
- x is a number of 0 to 100 and represents the percentage of the polyamide ester chain structure containing the following unit:
- ##STR7##
Dependencies are inferred from the claim text.