Copolycarbonate-polyesters, methods of manufacture, and uses thereof
View Patent ↗A copolycarbonate-polyester, comprising units of formula wherein at least 60 percent of the total number of R 1 groups are divalent aromatic organic radicals and the balance thereof are divalent aliphatic or alicyclic radicals; units of formula wherein T is a C 7-20 divalent alkyl aromatic radical or a C 6-20 divalent aromatic radical, and D is a divalent C 6-20 aromatic radical; and units of the formula wherein R 2 and R 3 are each independently a halogen or a C 1-6 alkyl group, R 4 is a methyl or phenyl group, each c is independently 0 to 4, and T is as described above.
1. A copolycarbonate-polyester, comprising
units of formula
wherein at least 60 percent of the total number of R 1 groups are divalent aromatic organic radicals and the balance thereof are divalent aliphatic or alicyclic radicals;
units of formula
wherein T is a C 7-20 divalent alkyl aromatic radical or a C 6-20 divalent aromatic radical, and D is a divalent C 6-20 aromatic radical; and
units of the formula
wherein R 2 and R 3 are each independently a halogen or a C 1-6 alkyl group, R 4 is a phenyl group, each c is independently 0 to 4, and T is as described above, and
wherein the number of R 1 groups that are derived from a monomer of the formula
is less than 10% of the total number of R 1 groups, wherein R 2 and R 3 are each independently a halogen or a C 1-6 alkyl group, R 4 is a phenyl group, and each c is independently 0 to 4.
2. The copolycarbonate-polyester of claim 1 , wherein at least a portion of the R 1 groups are derived from a dihydroxy compound of the formula
wherein R a and R b are each independently a halogen atom or a monovalent C 1-6 alkyl group; p and q are each independently integers of 0 to 4; and X a is one of the following groups:
wherein R c and R d are each independently a hydrogen atom or a C 1-29 alkyl group, or R c , C, and R d taken together are a divalent C 3-10 cycloalkyl group that is optionally substituted with one or more C 1-10 alkyl groups, and R e is a divalent hydrocarbon group.
3. The copolycarbonate-polyester of claim 2 , wherein p and q are each zero and X a is 2,2-propylene.
4. The copolycarbonate-polyester of claim 1 , wherein T is a C 6-20 divalent aromatic radical.
5. The copolycarbonate-polyester of claim 1 , wherein T is a divalent isophthaloyl radical and/or a divalent terephthaloyl radical.
6. The copolycarbonate-polyester of claim 1 , wherein D is derived from an aromatic diol of the formula
wherein R a and R b are each independently a halogen atom or a monovalent C 1-6 alkyl group; p and q are each independently integers of 0 to 4; and X a is one of the following groups:
wherein R c and R d are each independently a hydrogen atom or a C 1-29 alkyl group, or R c , C, and R d taken together are a divalent C 3-10 cycloalkyl group that is optionally substituted with one or more C 1-10 alkyl groups, and R e is a divalent hydrocarbon group.
7. The copolycarbonate-polyester of claim 6 , wherein p and q are each zero and X a is 2,2-propylene.
8. The copolycarbonate-polyester of claim 1 , wherein each c is 0.
9. The copolycarbonate-polyester of claim 1 , having a Tg of 180° C. to 300° C.
10. An article comprising the copolycarbonate-polyester of claim 1 .
11. The copolycarbonate-polyester of claim 1 , wherein the number of R 1 groups that are derived from a monomer of the formula
is less than 1% of the total number of R 1 groups, and wherein R 2 and R 3 are each independently a halogen or a C 1-6 alkyl group, R 4 is a phenyl group, and each c is independently 0 to 4.