US2013217830A1PendingUtilityA1
Clear Semi-Crystalline Articles with Improved Heat Resistance

Assignee: CRAWFORD EMMETT DUDLEYPriority: Feb 16, 2012Filed: Feb 16, 2012Published: Aug 22, 2013
Est. expiryFeb 16, 2032(~5.6 yrs left)· nominal 20-yr term from priority
Inventors:Emmett Dudley Crawford Michael Eugene Donelson
C08G 63/199C08L 67/02C08L 2205/02C08L 2203/10C08L 2201/10
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References
Claims
Abstract

The present invention relates to a clear, semicrystalline article comprising a polyester comprising terephthalic acid residues as the dicarboxylic acid component, and 1 to 15 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues and 85 to 99 mole % of 1,4-cyclohexanedimethanol residues as the glycol component. The article may be in the form of a film or sheet, a bottle, or a fiber. The article, when produced by a process involving strain-induced crystallization, is characterized with high crystallinity.
Claims

exact text as granted — not AI-modified
1 . A clear, semicrystalline article 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 30 mole % of aliphatic dicarboxylic acid residues having up to 16 carbon atoms; and 
   (b) a glycol component comprising:
 i) 1 to 14 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; and 
 ii) 86 to 99 mole % of 1,4-cyclohexanedimethanol residues, 
   wherein the total mole % of the dicarboxylic acid component is 100 mole %, and the total mole % of the glycol component is 100 mole %;   wherein the inherent viscosity of the polyester is 0.35 to 1.2 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C.;   wherein said polyester has a Tg of 85 to 115° C.; and   wherein said article has a strain induced crystallinity of greater than zero when stretched at a temperature above the Tg of the polyester.   
     
     
         2 . The article of  claim 1 , wherein the inherent viscosity of the polyester is from 0.35 to less than 1.0 dL/g. 
     
     
         3 . The article of  claim 1 , wherein the inherent viscosity of the polyester is from 0.35 to 0.80 dL/g. 
     
     
         4 . The article of  claim 1 , wherein the inherent viscosity of the polyester is from 0.50 to 0.75 dL/g. 
     
     
         5 . The article of  claim 1 , wherein the inherent viscosity of the polyester is from 0.60 to 0.75 dL/g. 
     
     
         6 . The article of  claim 1 , wherein said polyester has a crystallization half-time of less than 10 minutes but greater than about 30 seconds at 170° C. 
     
     
         7 . The article of  claim 1 , wherein said polyester has a Tg of 90 to 110° C. 
     
     
         8 . The article of  claim 1 , wherein the dicarboxylic acid component of the polyester comprises 80 to 100 mole % of terephthalic acid residues. 
     
     
         9 . The article of  claim 1 , wherein the dicarboxylic acid component of the polyester comprises 90 to 100 mole % of terephthalic acid residues. 
     
     
         10 . The article of  claim 1 , wherein the dicarboxylic acid component of the polyester comprises 95 to 100 mole % of terephthalic acid residues. 
     
     
         11 . The article of  claim 1 , wherein the dicarboxylic acid component of the polyester comprises 99 to 100 mole % of terephthalic acid residues. 
     
     
         12 . The article of  claim 1 , wherein said polyester is blended with at least one polymer chosen from at least one of the following: poly(etherimides), polyesters other than those of  claim 1 , polyphenylene oxides, poly(phenylene oxide)/polystyrene blends, polystyrene resins, polyphenylene sulfides, polyphenylene sulfide/sulfones, poly(ester-carbonates), polycarbonates, polysulfones; polysulfone ethers, and poly(ether-ketones). 
     
     
         13 . The article of  claim 1 , wherein said polyester comprises residues of at least one branching agent. 
     
     
         14 . The article of  claim 13 , wherein said polyester comprises residues of at least one branching agent an amount of 0.01 to 10 weight % based on the total mole percentage of the diacid or diol residues. 
     
     
         15 . The article of  claim 1 , wherein the yellowness index of said polyester according to ASTM D-1925 is less than 50. 
     
     
         16 . The article of  claim 1 , wherein the polyester has a b* value of from −10 to less than 10 and a L* value from 50 to 90 according to the L*, a* and b* color system of the CIE (International Commission on Illumination. 
     
     
         17 . A clear strain induced crystallized article according to  claim 1 . 
     
     
         18 . The article of  claim 1  wherein said article has a strain induced crystallinity of from 0.8% to 35% when stretched at a temperature above the Tg of the polyester. 
     
     
         19 . The article of  claim 1  wherein said article has a strain induced crystallinity of from 8% to 35% when stretched at a temperature 10° C. above the Tg of the polyester. 
     
     
         20 . The article of  claim 1  wherein said article has a strain induced crystallinity of from 8% to 35% when stretched at a temperature 20° C. above the Tg of the polyester. 
     
     
         21 . The article of  claim 1  wherein said article has a strain induced crystallinity of from 10% to 35% when stretched at a temperature 10° C. above the Tg of the polyester. 
     
     
         22 . The article of  claim 1  wherein said article has a strain induced crystallinity of from 10% to 35% when stretched at a temperature 20° C. above the Tg of the polyester. 
     
     
         23 . The article of  claim 1  wherein said article has a strain induced crystallinity of from 10% to 30% when stretched at a temperature 10° C. above the Tg of the polyester. 
     
     
         24 . The article of  claim 1  wherein said article has a strain induced crystallinity of from 10% to 30% when stretched at a temperature 20° C. above the Tg of the polyester. 
     
     
         25 . A film or sheet according to  claim 1 . 
     
     
         26 . A bottle according to  claim 1 . 
     
     
         27 . A fiber according to  claim 1 . 
     
     
         28 . A clear, semicrystalline, strain induced crystallized article 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 30 mole % of aliphatic dicarboxylic acid residues having up to 16 carbon atoms; and 
   (b) a glycol component comprising:
 i) 1 to 14 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; and 
 ii) 86 to 99 mole % of 1,4-cyclohexanedimethanol residues, 
   wherein the total mole % of the dicarboxylic acid component is 100 mole %, and the total mole % of the glycol component is 100 mole %;   wherein the inherent viscosity of the polyester is 0.35 to 1.2 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.5 g/100 ml at 25° C.; and   wherein said polyester has a Tg of 85 to 115° C., and a crystallization half-time of less than 10 minutes but greater than about 30 seconds at 170° C.   
     
     
         29 . The article of  claim 28 , wherein the inherent viscosity of the polyester is from 0.35 to less than 1.0 dL/g. 
     
     
         30 . The article of  claim 28 , wherein the inherent viscosity of the polyester is from 0.35 to 0.80 dL/g. 
     
     
         31 . The article of  claim 28 , wherein the inherent viscosity of the polyester is from 0.50 to 0.75 dL/g. 
     
     
         32 . The article of  claim 28 , wherein the inherent viscosity of the polyester is from 0.60 to 0.75 dL/g. 
     
     
         33 . The article of  claim 28 , wherein said polyester has a Tg of 90 to 115° C. 
     
     
         34 . The article of  claim 28 , wherein said polyester has a Tg of 90 to 110° C. 
     
     
         35 . The article of  claim 28 , wherein the dicarboxylic acid component of the polyester comprises 80 to 100 mole % of terephthalic acid residues. 
     
     
         36 . The article of  claim 28 , wherein the dicarboxylic acid component of the polyester comprises 90 to 100 mole % of terephthalic acid residues. 
     
     
         37 . The article of  claim 28 , wherein the dicarboxylic acid component of the polyester comprises 95 to 100 mole % of terephthalic acid residues. 
     
     
         38 . The article of  claim 28 , wherein the polyester comprises 5 to 14 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues and 86 to 95 mole % of 1,4-cyclohexanedimethanol residues. 
     
     
         39 . The article of  claim 28 , wherein said polyester comprises ethylene glycol residues. 
     
     
         40 . The article of  claim 28 , wherein said polyester is blended with at least one polymer chosen from at least one of the following: poly(etherimides), polyesters other than those of  claim 28 , polyphenylene oxides, poly(phenylene oxide)/polystyrene blends, polystyrene resins, polyphenylene sulfides, polyphenylene sulfide/sulfones, poly(ester-carbonates), polycarbonates, polysulfones; polysulfone ethers, and poly(ether-ketones). 
     
     
         41 . The article of  claim 28 , wherein said polyester comprises residues of at least one branching agent. 
     
     
         42 . The article of  claim 28 , wherein said polyester comprises residues of at least one branching agent an amount of 0.01 to 10 weight % based on the total mole percentage of the diacid or diol residues. 
     
     
         43 . The article of  claim 28  wherein the yellowness index of said polyester according to ASM D-1925 is less than 50. 
     
     
         44 . The article of  claim 28  wherein the polyester has a b* value of from −10 to less than 10 and a L* value from 50 to 90 according to the L*, a* and b* color system of the CIE (International Commission on Illumination. 
     
     
         45 . The article of  claim 28  wherein said article has a strain induced crystallinity of from 5% to 35% when stretched at a temperature 10° C. above the Tg of the polyester. 
     
     
         46 . The article of  claim 28  wherein said article has a strain induced crystallinity of from 8% to 35% when stretched at a temperature 20° C. above the Tg of the polyester. 
     
     
         47 . The article of  claim 28  wherein said article has a strain induced crystallinity of from 10% to 35% when stretched at a temperature 10° C. above the Tg of the polyester. 
     
     
         48 . The article of  claim 28  wherein said article has a strain induced crystallinity of from 10% to 35% when stretched at a temperature 20° C. above the Tg of the polyester. 
     
     
         49 . The article of  claim 28  wherein said article has a strain induced crystallinity of from 10% to 30% when stretched at a temperature 10° C. above the Tg of the polyester. 
     
     
         50 . The article of  claim 28  wherein said article has a strain induced crystallinity of from 10% to 30% when stretched at a temperature 20° C. above the Tg of the polyester. 
     
     
         51 . A film or sheet according to  claim 28 . 
     
     
         52 . A bottle according to  claim 28 . 
     
     
         53 . A fiber according to  claim 28 .
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