Aliphatic-aromatic copolyesters and cellulose ester/polymer blends
AssigneeEastman Chemical Company
InventorsCharles M. Buchanan, Robert M. Gardner, Matthew D. Wood, Alan W. White, Steven C. Gedon, Fred D. Barlow, Jr.
Life of this patent
Estimating the term…
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, molded objects, and films prepared therefrom.
Claims20
One or more fibers prepared from binary blends comprising:
- (A) about 5% to about 98% of a C.sub.1 -C.sub.10 ester of cellulose having a DS/AGU of about 1.7 to about 2.75 and an inherent viscosity of about 0.2 to about 3.0 deciliters/gram as measured at a temperature of 25.degree. C. for a 0.5 g sample in 100 ml of a 60/40 parts by weight solution of phenol/tetrachloroethane, and
- (B) about 2% to about 95% of an aliphatic polyester having an inherent viscosity of about 0.2 to about 2.0 deciliters/gram as measured at a temperature of 25.degree. C. for a 0.5 g sample in 100 ml of a 60/40 parts by weight solution of phenol/tetrachloroethane, said percentages being based on the weight of component (A) plus component (B).
One or more fibers prepared from a linear, random, semicrystalline aliphatic-aromatic copolyester which has an inherent viscosity of about 0.5 to 1.8 deciliters/gram as measured at a temperature of 25.degree. C. for a 0.5 g sample in 100 mL of a 60/40 parts by weight solution of phenol/tetrachloroethane wherein the aliphatic-aromatic copolyester is comprised of repeat units of the following structures:
- ##STR8## wherein R.sup.11 and R.sup.12 are the same and are selected from the group consisting of C.sub.4 and C.sub.6 alkylene wherein R.sup.11 and R.sup.12 are 100% of the diol components;
- R.sup.13 is selected from the group consisting of C.sub.3 -C.sub.4 alkylene wherein the mole % of R.sup.13 is from about 40-60% of the dicarboxylic components;
- and R.sup.14 is selected from the group consisting of C6-C10 aryl wherein the mole % of R.sup.14 is from about 60-40% of the dicarboxylic component.
Dependencies are inferred from the claim text.