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US 2024/0360269 A1Published application
Co-polyester polyols and co-polyesters including glycols and polyurethanes and spandex produced therefrom
OwnerOguzhan Celebi, Qun Sun +1inventors
InventorsOGUZHAN CELEBI, QUN SUN, NICHOLAS E. KURLAND
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Abstract
Co-polyester glycols and polyurethanes and poly(urethane ureas) derived from mixtures containing 2-methyl-1,4-butanediol, articles of manufacture thereof and methods for their production and use are provided.
Claims17
A polyester glycol comprising 2-methyl-1,4-butanediol and dicarboxylic acid or a mixture of dicarboxylic acids.
A polyurethane comprising 2-methyl-1,4-butanediol.
A method for producing a spandex fiber comprising:
- (a) providing a glycol formed from 2-methyl-1,4-butanediol and 1,4-butanediol and adipic acid, optionally blended with a polyether polyol, a polyester polyol, a polycarbonate polyol, and combinations thereof;
- (b) contacting the glycol of step (a) with a diisocyanate to form a capped glycol;
- (c) contacting the capped glycol of step (b) with a chain extender and a chain terminator composition in a solvent to form a poly(urethane urea) in solution;
- and
- (g) spinning the poly(urethane urea) in solution to form the spandex.
2 more elements
Dependencies are inferred from the claim text.