Claims
- 1. A blend that is capable of being extrusion blow-molded, said blend comprising polycarbonate and copolyester.
- 2. The blend according to claim 1, which comprises between 45 and 90 weight percent of the copolyester and between 10 and 55 weight percent of the polycarbonate.
- 3. The blend according to claim 1, which has a shear thinning ratio of at least about 3.
- 4. The blend according to claim 1, wherein the polycarbonate has a melt flow rate between 2 and 18.
- 5. The blend according to claim 1, wherein the polycarbonate comprises a branching agent.
- 6. The blend according to claim 1, wherein the copolyester has an inherent viscosity of about 0.5 to 1.1 and a shear thinning ratio of at least about 5, and comprises:
A. diacid residues comprising terephthalic acid residues; B. diol residues comprising about 52 to 75 mole percent of 1,4-cyclohexanedimethanol residues and about 25 to 48 mole percent of ethylene glycol residues; and C. about 0.05 to 1.0 mole percent of the residue of a trifunctional monomer.
- 7. The blend according to claim 6, wherein the copolyester comprises
A. diacid residues comprising at least 40 mole percent of terephthalic acid residues; B. diol residues comprising about 52 to 65 mole percent of 1,4-cyclohexanedimethanol residues and about 35 to 48 mole percent of ethylene glycol residues; and C. about 0.05 to 1.0 mole percent of the residue of a benzenetricarboxylic acid or anhydride.
- 8. The blend according to claim 6, wherein the copolyester has an inherent viscosity of about 0.6 to 0.9, and comprises:
A. diacid residues comprising at least 40 mole percent of terephthalic acid residues; B. diol residues comprising about 52 to 75 mole percent of 1,4-cyclohexanedimethanol residues and about 25 to 48 mole percent of ethylene glycol residues; and C. about 0.1 to 0.25 mole percent of the residue of a benzenetricarboxylic acid or anhydride.
- 9. The blend according to claim 6, wherein the copolyester has an inherent viscosity of about 0.6 to 0.9, and comprises:
A. diacid residues consisting essentially of terephthalic acid residues; B. diol residues consisting essentially of about 52 to 75 mole percent of 1,4-cyclohexanedimethanol residues and about 25 to 48 mole percent of ethylene glycol residues; and C. about 0.1 to 0.25 mole percent of trimellitic acid or anhydride residues.
- 10. The blend according to claim 6, wherein the trifunctional monomer is selected from the group consisting of tricarboxylic acids or esters thereof and aliphatic triols.
- 11. The blend according to claim 10, wherein the trifunctional monomer is a benzenetricarboxylic acid or anhydride.
- 12. A blend that is capable of being extrusion blow-molded, said blend comprising polycarbonate and at least one copolyester.
- 13. The blend according to claim 12, which comprises 45 to 90 weight percent of copolyester and 10 to 55 weight percent of polycarbonate.
- 14. The blend according to claim 12, which has a shear thinning ratio of at least about 3.
- 15. The blend according to claim 12, wherein the polycarbonate has a melt flow rate between 2 and 18.
- 16. The blend according to claim 12, wherein the polycarbonate comprises a branching agent.
- 17. The blend according to claim 12, which comprises about 40 to 100 weight percent of a first copolyester and about 0 to 60 weight percent of a second copolyester, wherein the first copolyester has an inherent viscosity of about 0.5 to 1.1 and a shear thinning ratio of at least about 5, and comprises:
A. diacid residues comprising terephthalic acid residues; B. diol residues comprising about 45 to 75 mole percent of 1,4-cyclohexanedimethanol residues and about 25 to 55 mole percent of ethylene glycol residues; and C. about 0.05 to 1.0 mole percent of the residue of a trifunctional monomer, wherein the second copolyester has an inherent viscosity of about 0.5 to 1.1 and a shear thinning ratio of at least about 2, and comprises: A. diacid residues comprising terephthalic acid residues; and B. diol residues comprising about 52 to 90 mole percent 1,4-cyclohexanedimethanol residues and about 10 to 48 mole percent ethylene glycol residues, and wherein the average amount of 1,4-cyclohexanedimethanol residues in the first and second copolyesters is between 52 to 75 mole percent.
- 18. The blend according to claim 17, wherein the first copolyester comprises:
A. diacid residues comprising at least 40 mole percent of terephthalic acid residues; B. diol residues comprising about 45 to 65 mole percent of 1,4-cyclohexanedimethanol residues and about 35 to 55 mole percent of ethylene glycol residues; and C. about 0.05 to 1.0 mole percent of the residue of a benzenetricarboxylic acid or anhydride.
- 19. The blend according to claim 17, wherein the first copolyester has an inherent viscosity of about 0.6 to 0.9, and comprises:
A. diacid residues comprising at least 40 mole percent of terephthalic acid residues; B. diol residues comprising about 45 to 75 mole percent of 1,4-cyclohexanedimethanol residues and about 25 to 55 mole percent of ethylene glycol residues; and C. about 0.1 to 0.25 mole percent of the residue of a benzenetricarboxylic acid or anhydride, and wherein the second copolyester has an inherent viscosity of about 0.6 to 0.9, and comprises: A. diacid residues comprising terephthalic acid residues; and B. diol residues comprising about 52 to 90 mole percent 1,4-cyclohexanedimethanol residues and about 10 to 48 mole percent ethylene glycol residues.
- 20. The blend according to claim 17, wherein the first copolyester has an inherent viscosity of about 0.6 to 0.9, and comprises:
A. diacid residues consisting essentially of terephthalic acid residues; B. diol residues consisting essentially of about 48 to 65 mole percent 1,4-cyclohexanedimethanol residues and about 35 to 52 mole percent ethylene glycol residues; and C. about 0.1 to 0.25 mole percent trimellitic acid or anhydride residues.
- 21. A blend that is capable of being extrusion blow-molded, said blend comprising:
I. about 1 to 99 weight percent of a polycarbonate comprising a diol component comprising about 90 to 100 mole percent of 4,4′-isopropylidenediphenol units and about 0 to 10 mol percent modifying diol units having 2 to 16 carbon atoms; and II. about 1 to 99 weight percent of a mixture comprising:
A. about 40 to 100 weight percent of a first copolyester comprising:
(1) diacid residues comprising terephthalic acid residues; (2) diol residues comprising about 45 to 75 mole percent of 1,4-cyclohexanedimethanol residues and about 25 to 55 mole percent of ethylene glycol residues; and (3) about 0.05 to 1.0 mole percent of the residue of a trifunctional monomer; and B. about 0 to 60 weight percent of a second copolyester comprising:
(1) diacid residues comprising terephthalic acid residues; and (2) diol residues comprising about 52 to 90 mole percent 1,4-cyclohexanedimethanol residues and about 10 to 48 mole percent ethylene glycol residues, wherein the average amount of 1,4-cyclohexanedimethanol residues in the first and second copQlyesters is between 52 to 75 mole percent.
- 22. The blend according to claim 21, which comprises between 45 and 90 weight percent of the mixture and between 10 and 55 weight percent of the polycarbonate.
- 23. A method of making a clear article from the blend of claim 21, said method comprising the steps of:
(a) blending the polycarbonate, the first copolyester, and optionally the second copolyester; (b) before, during, or after step (a), melting the polycarbonate, the first copolyester, and optionally the second copolyester to form a melt blend; and (c) cooling the melt blend to form a clear article.
- 24. A shaped article extrusion blow-molded from the blend of claim 1.
- 25. A shaped article extrusion blow-molded from the blend of claim 12.
- 26. A shaped article extrusion blow-molded from the blend of claim 21.
- 27. A container extrusion blow-molded from the blend of 9.
- 28. A container extrusion blow-molded from the blend of 20.
- 29. A container extrusion blow-molded from the blend of 21.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of the filing date of U.S. Provisional Patent Application No. 60/439,681, filed on Jan. 13, 2003, under 35 U.S.C. 3 119(e). The entire content of the '681 application is hereby incorporated by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60439681 |
Jan 2003 |
US |