Copolyesters and fibrous materials formed therefrom
AssigneeEastman Chemical Company
InventorsWilliam A. Haile, Leron R. Dean, Richard L. McConnell, Mark E. Tincher, Alan W. White, Charles M. Buchanan
Life of this patent
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Abstract
This invention relates to binary blends of cellulose esters and aliphatic-aromatic copolyesters, cellulose esters and aliphatic polyesters as well as ternary blends of cellulose esters and/or aliphatic polyesters and/or aliphatic-aromatic copolyesters and/or polymeric compounds as well as fibers, nonwovens, molded objects, and films prepared therefrom.
Claims11
A fiber prepared from a copolyester having a dicarboxylic acid component and a diol component, the copolyester comprising repeat units of the following structures:
- wherein the diol component comprises —O—R11—O— and —O—R12—O—, where R11 and R12 are selected from the group consisting of C2-C12 alkylene, C5-C10 cycloalkylene, C2-C12 oxyalkylene and mixtures thereof;
- wherein the dicarboxylic acid component contains both aliphatic dicarboxylic acid —O—C(O)—R3—C(O)—, and an aromatic or cycloaliphatic dicarboxylic acid component —O—C(O)—R14—C(O)—,
- wherein R13 is selected from the group consisting of C0-C8 alkylene, C2-C4 oxyalkylene and mixtures thereof, wherein the mole % of R13 is less than about 95% and is greater than 60% of the dicarboxylic acid component;
- and R14 is selected from the group consisting of C6-C10 aryl, C5-C10 cycloaliphatic and mixtures thereof wherein the mole % of R14 is from greater than about 5% and is less than 40% of the dicarboxylic acid component.
A copolyester comprising repeat units of the following structures:
- wherein the diol component comprises —O—R11—O— and —O—R12—O—, where R11 and R12 are selected from the group consisting of C2-C12 alkylene, C5-C10 cycloaklene, C2-C12 oxyalkylene and mixtures thereof;
- wherein the dicarboxylic acid component contains an aliphatic dicarboxylic acid R13, and an aromatic or cycloaliphatic dicarboxylic acid component R14;
- wherein R13 is selected from the group consisting of C0-C8 alkylene or C2-C4 oxyalkylene or mixtures thereof, wherein the mole % of R13 is less than about 95% and is greater than 60% of the dicarboxylic acid component;
- and R14 is selected from the group consisting of C6-C10 aryl, cycloaliphatic and mixtures thereof wherein the mole % of R14 is from greater than about 5% and is less than 40% of the dicarboxylic acid component;
- and
- wherein the copolyester has a melting point ranging from about 75° C. to about 160° C.
Dependencies are inferred from the claim text.