Ester-modified dicarboxylate polymers
AssigneeE. I. Du Pont de Nemours and Company
InventorsJoseph V. Kurian, Yuanfeng Liang
Life of this patent
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Abstract
A polymer comprising poly(alkylene-co-dianhydrosugar ester) dicarboxylate and its preparation by reacting an alkylene diol, terephthalic acid, and a moiety of formula 1 X-Ia-(A-I)n-Ab-X Formula 1 wherein: A is the ester residue from an anhydrosugar alcohol or dianhydrosugar alcohol, I is the ester residue from a diacid or its dialkyl esters, X is H when linked to an A residue, OH when linked to an I residue derived from a dibasic acid, and OR when linked to an I residue derived from a dialkyl ester of the dibasic acid, R is a C1-C4 straight or branched chain alkyl group, a and b are independently 0 or 1, and n is 1 to 10 is disclosed.
Claims26
A polymer comprising poly(alkylene-co-dianhydrosugar ester) dicarboxylate.
A polymer comprising the reaction product of alkylene diol, dicarboxylic acid, and a moiety of formula 1
- X-Ia-(A-I)n-Ab-X Formula 1
- wherein:
- A is the ester residue from an anhydrosugar alcohol or dianhydrosugar alcohol,
- I is the ester residue from a diacid or its dialkyl esters,
- X is H when linked to an A residue, OH when linked to an
- I residue derived from a dibasic acid, and OR when linked to an I residue derived from a dialkyl ester of the dibasic acid,
- R is a C1-C4 straight or branched chain alkyl group,
- a and b are independently 0 or 1, and
- n is 1 to 10.
A process of incorporating a dianhydrosugar alcohol into a polyester comprising
- C) contacting a dianhydrosugar alcohol with an acid to yield an ester, or contacting a dialkyl ester with a dianhydrosugar alcohol to yield an ester, and
- D) polycondensing said ester with a polyalkylene ester oligomer.
An ester comprising formula 1
- X-Ia-(A-I)n-Ab-X Formula 1
- wherein:
- A is the ester residue from an anhydrosugar alcohol or dianhydrosugar alcohol,
- I is the ester residue from a diacid or its dialkyl esters,
- X is H when linked to an A residue, OH when linked to an
- I residue derived from a dibasic acid, and OR when linked to an I residue derived from a dialkyl ester of the dibasic acid,
- R is a C1-C4 straight or branched chain alkyl group,
- a and b are independently 0 or 1, and
- n is 1 to 10.
Dependencies are inferred from the claim text.