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.
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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, molded objects, and films prepared therefrom.
Claims66
A shaped article prepared from a binary blend comprising:
- (A) about 5% to about 98% by weight of a C.sub.1 -C.sub.10 ester of cellulose having a DS/AGU of about 1.7 to 3.0 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% by weight of an aliphatic-aromatic copolyester 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).
A shaped article comprising a binary blend further 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).
A shaped article comprising a ternary blend further comprising:
- (A) about 4% to about 97% of a C1-C10 ester of cellulose having a DS/AGU of about 1.7 to 3.0 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,
- (B) about 2% to about 95% of an aliphatic polyester and/or an aliphatic-aromatic copolyester 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,
- (C) about 1% to about 94% of polymeric compounds having an inherent viscosity of about 0.4 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) plus component (C).
A shaped article comprising 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 structure:
- ##STR11## wherein R.sup.11 and R.sup.12 are the same and are selected from the groups 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 C.sub.6 -C.sub.10 aryl wherein the mole % of R.sup.14 is from about 60-40% of the dicarboxylic component.
Dependencies are inferred from the claim text.