High flow misible polycarbonate polyester composition

1 . A high flow miscible thermoplastic resin blend composition comprising:

a substituted or unsubstituted polycarbonate; and

a substituted or unsubstituted aliphatic polyester, said polyester having an intrinsic viscosity of 0.1 to 0.5 deciliters per gram.

2 . The composition of claim 1 , wherein said polycarbonate comprises repeating units of the formula:

wherein R 1 is a divalent aliphatic or aromatic radical derived from a dihydroxy compound of the formula HO—D—OH, wherein D has the structure of formula:

wherein A 1 represents an aromatic group or an aliphatic group; E comprises a sulfur-containing linkage, sulfide, sulfoxide, sulfone; a phosphorus-containing linkage, phosphinyl, phosphonyl; an ether linkage; a carbonyl group; a tertiary nitrogen group; a silicon-containing linkage; silane; siloxy; a cycloaliphatic group; cyclopentylidene, cyclohexylidene, 3,3,5-trimethylcyclohexylidene, methylcyclohexylidene, 2-[2.2.1]-bicycloheptylidene, neopentylidene, cyclopentadecylidene, cyclododecylidene, adamantylidene; an alkylene or alkylidene group, which group may optionally be part of one or more fused rings attached to one or more aromatic groups bearing one hydroxy substituent; an unsaturated alkylidene group; or two or more alkylene or alkylidene groups connected by a moiety different from alkylene or alkylidene and selected from the group consisting of an aromatic linkage, a tertiary nitrogen linkage; an ether linkage; a carbonyl linkage; a silicon-containing linkage, silane, siloxy; a sulfur-containing linkage, sulfide, sulfoxide, sulfone; a phosphorus-containing linkage, phosphinyl, and phosphonyl;

R 1 independently at each occurrence comprises a mono-valent hydrocarbon group, alkenyl, allyl, alkyl, aryl, aralkyl, alkaryl, or cycloalkyl;

Y 1 independently at each occurrence is selected from the group consisting of an inorganic atom, a halogen; an inorganic group, a nitro group; an organic group, a monovalent hydrocarbon group, alkenyl, allyl, alkyl, aryl, aralkyl, alkaryl, cycloalkyl, and an alkoxy group;

the letter “m” represents any integer from and including zero through the number of replaceable hydrogens on A 1 available for substitution;

the letter “p” represents an integer from and including zero through the number of replaceable hydrogens on E available for substitution;

the letter “t” represents an integer equal to at least one;

the letter “s” represents an integer equal to either zero or one; and

“u” represents any integer including zero.

3 . The composition of claim 2 , wherein the dihydroxyaromatic compound from which D is derived is bisphenol A.

4 . The composition of claim 2 , wherein the dihydroxyaromatic compound from which D is derived is a modified bisphenol A.

5 . The composition of claim 4 , wherein the bisphenol A is modified with diol wherein said diol is at least one selected from the group consisting of a alkylydiene diols, alkane diols, straight chain, branched, or cycloaliphatic alkane diols containing at least about 2 to 20 carbon atoms.

6 . The composition of claim 5 , wherein the diol is selected from a group consisting of ethylene glycol; propylene glycol, pentane diol; dipropylene glycol; 2-methyl-1,5-pentane diol; 1,6-hexane diol; dimethanol decalin, dimethanol bicyclo octane; 1,4-cyclohexane dimethanol and particularly its cis- and trans-isomers; triethylene glycol; 1,10-decane diol; and mixtures thereof.

7 . The composition of claim 1 , wherein the polycarbonate comprises a mixture of aromatic and aliphatic polycarbonates.

8 . The composition of claim 7 , wherein said polycarbonate comprises a mixture of bisphenol A polycarbonate and tricyclodecane methanol polycarbonate.

9 . The composition of claim 1 , wherein the polyester is selected from the group consisting of poly(ethylene terephthalate), poly(butylene terephthalate), poly(propylene terephthalate), poly(cyclohexanedimethanol terephthalate), poly(cyclohexanedimethanol-terephthalic acid-ethylene glycol), poly(butylene-2,6-naphthalate), poly(ethylene-2,6-naphthalate), poly(butylene dicarboxylate) and combinations thereof.

10 . (canceled)

11 . The composition of claim 1 , wherein the molecular weight of the polyester is in a range of between about 8,000 to about 20,000.

12 . The composition of claim 1 , wherein said thermoplastic resin composition comprises polyester and polycarbonate in a range of about 10 to 90 percent by weight of polyester and 90 to 10 percent by weight of polycarbonate.

13 . The composition of claim 1 , wherein said thermoplastic resin composition comprises polyester and polycarbonate in a range of about 30 to 70 percent by weight of polyester and 70 to 30 percent by weight of polycarbonate.

14 . The composition of claim 1 , wherein said thermoplastic resin composition has a yellowness index of less than about 10.

15 . The composition of claim 1 , wherein said thermoplastic resin composition has a glass transition temperature of between about 85° C. and about 125° C.

16 . An article comprising the composition of claim 1 .

17 . A high flow miscible thermoplastic resin blend composition comprising:

a substituted or unsubstituted polycarbonate; and

a substituted or unsubstituted low molecular weight aliphatic polyester having a weight average molecular weight of from 5,000 to 30,000 g/mol.

18 . The composition of claim 17 , wherein said polycarbonate is a bisphenol A polycarbonate.

19 . The composition of claim 17 , wherein said polyester is selected from the group consisting of poly(ethylene terephthalate), poly(butylene terephthalate), poly(propylene terephthalate), poly(cyclohexanedimethanol terephthalate), poly(cyclohexanedimethanol-terephthalic acid-ethylene glycol), poly(butylene-2,6-naphthalate), poly(ethylene-2,6-naphthalate), poly(butylene dicarboxylate) and combinations thereof.

20 . The composition of claim 17 , wherein said polyester has a weight average molecular weight in a range of between about 8,000 and about 20,000.

21 . The composition of claim 17 , wherein said thermoplastic resin composition comprises polyester and polycarbonate in a range of about 10 to about 90 percent by weight of polyester and about 90 to about 10 percent by weight of polycarbonate.

22 . The composition of claim 17 , wherein said thermoplastic resin composition has a yellowness index of less than about 10.

23 . The composition of claim 17 , wherein said thermoplastic resin composition has a glass transition temperature of between about 85° C. and about 125° C.

24 . An article comprising the composition of claim 17 .

25 - 33 . (canceled)

34 . The composition of claim 1 , wherein the composition has a Tg of from 85 to 115° C.

35 . The composition of claim 1 , wherein the polyester is a thermally degraded PCCD.

36 . The composition of claim 17 , wherein the composition has a Tg of from 85 to 115° C.

37 . The composition of claim 17 , wherein the polyester is a thermally degraded PCCD.

38 . A high flow miscible thermoplastic resin blend composition comprising:

a substituted or unsubstituted polycarbonate; and

a substituted or unsubstituted aliphatic polyester, wherein the polycarbonate comprises a mixture of bisphenol A polycarbonate and tricyclodecane methanol polycarbonate.

39 . The composition of claim 38 , further comprising bis(4-hydroxy-1-ethoxy) phenyl dimethyl methane polycarbonate.

40 . The composition of claim 39 , wherein the composition has a Tg of 82 to 102° C.

41 . The composition of claim 38 , wherein the composition has a Tg of 82 to 102° C.

42 . A high flow miscible thermoplastic resin blend composition comprising:

a substituted or unsubstituted polycarbonate; and

a substituted or unsubstituted aliphatic polyester, wherein the polycarbonate comprises a polycarbonate having a Tg of from 62° C. to 65° C.

43 . The composition of claim 42 , wherein the composition has a Tg of 82 to 102° C.