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US 7,842,776 B2Granted
Appliance parts comprising polyester compositions formed from 2,2,4,4-tetramethyl-1,3-cyclobutanediol and 1,4-cyclohexanedimethanol
AssigneeEastman Chemical Company
InventorsEmmett Dudley Crawford, David Scott Porter, Gary Wayne Connell
Life of this patent
Estimating the term…
Abstract
Described are appliance parts comprising polyester compositions comprising polyesters which comprise (a) a dicarboxylic acid component having terephthalic acid residues; optionally, aromatic dicarboxylic acid residues or aliphatic dicarboxylic acid residues or ester residues thereof; 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; and 1,4-cyclohexanedimethanol residues.
Claims45
An appliance part comprising at least one polyester composition comprising at least one polyester, which comprises:
- (a) a dicarboxylic acid component comprising:
- i) 80 to 100 mole % of terephthalic acid residues;
- ii) 0 to 20 mole % of aromatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- iii) 0 to 10 mole % of aliphatic dicarboxylic acid residues having up to 16 carbon atoms;
- and
- (b) a glycol component comprising:
- i) 20 to 30 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues;
- and
- ii) 70 to 80 mole % of 1,4-cyclohexanedimethanol residues,
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, the total mole % of the glycol component is 100 mole %;
- and
- wherein the inherent viscosity of the polyester is from 0.60 to 0.75 dL/g as determined in 60/40 (wt/wt) phenol/ tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C.;
- wherein the polyester has a Tg of from 100 to 130° C.;
- wherein said polyester has a notched Izod impact strength of at least 7.5 ft-lb/inch at 23° C. according to ASTM D256 with a 10-mil notch in a ⅛-inch thick bar;
- wherein the melt viscosity of said polyester is less than 10,000 poise as measured at 1 radian/second on a rotary melt rheometer at 290° C.;
- and
- wherein said polyester composition contains no polycarbonate.
15 more elements
An appliance part comprising at least one polyester composition comprising at least one polyester, which comprises:
- (a) a dicarboxylic acid component comprising:
- i) 80 to 100 mole % of terephthalic acid residues;
- ii) 0 to 20 mole % of aromatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- iii) 0 to 10 mole % of aliphatic dicarboxylic acid residues having up to 16 carbon atoms;
- and
- (b) a glycol component comprising:
- i) 20 to 30 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues;
- ii) 70 to 80 mole % of 1,4-cyclohexanedimethanol residues, and
- iii) residues of at least one branching agent;
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, the total mole % of the glycol component is 100 mole %;
- and
- wherein the inherent viscosity of the polyester is from 0.60 to 0.75 dL/g as determined in 60/40 (wt/wt) phenol/ tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C.;
- wherein the polyester has a Tg of from 100 to 130° C.;
- wherein said polyester has a notched Izod impact strength of at least 7.5 ft-lb/inch at 23° C. according to ASTM D256 with a 10-mil notch in a ⅛-inch thick bar;
- wherein the melt viscosity of said polyester is less than 10,000 poise as measured at 1 radian/second on a rotary melt rheometer at 290° C.;
- and
- wherein said polyester composition contains no polycarbonate.
15 more elements
An appliance part comprising at least one polyester composition comprising at least one polyester, which comprises:
- (a) a dicarboxylic acid component comprising:
- i) 70 to 100 mole % of terephthalic acid residues;
- ii) 0 to 30 mole % of aromatic dicarboxylic acid residues having up to 20 carbon atoms;
- and
- iii) 0 to 10 mole % of aliphatic dicarboxylic acid residues having up to 16 carbon atoms;
- and
- (b) a glycol component comprising:
- i) 20 to 30 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues;
- and
- ii) 70 to 80 mole % of 1,4-cyclohexanedimethanol residues,
- wherein the total mole % of the dicarboxylic acid component is 100 mole %, the total mole % of the glycol component is 100 mole %;
- and
- (c) at least one thermal stabilizer;
- wherein the inherent viscosity of the polyester is from 0.60 to 0.75 dL/g as determined in 60/40 (wt/wt) phenol/ tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C.;
- wherein the polyester has a Tg of from 100 to 130° C.;
- wherein said polyester composition contains no polycarbonate;
- wherein said polyester has a notched Izod impact strength of at least 7.5 ft-lbs/in at 23° C. according to ASTM D256 with a 10-mil notch in a ⅛-inch thick bar;
- and wherein the melt viscosity of said polyester is less than 10,000 poise as measured at 1 radian/second on a rotary melt rheometer at 290° C.
15 more elements
Dependencies are inferred from the claim text.