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US 5,510,451 AGranted
Copolyester amides
AssigneeGeneral Electric Company
InventorsReinoud J. Gaymans, Jeannette L. de Haan
Life of this patent
Estimating the term…
Abstract
The invention deals with copolyester amides built up from units derived from terephthalic acid, 1,4-butane-diol and 1,4-butane diamine.
Claims8
A copolyester amide comprising amide units of the formula ##STR1## and ester units of the formula ##STR2## where R is a paraphenylene radical and said amide units are present in said copolyester amide at a level up to about 35 mole percent based on the total moles of amide unit and ester units in said copolyester amide wherein said mole percent amide is calculated by a/(a+b).times.100;
- wherein a and b represent the number of repeat units of said amide and said ester, respectively.
Dependencies are inferred from the claim text.