Claims
- 1. A blend composition comprising:
- (A) from 1 to 99 percent by weight of a polycarbonate comprising a diol component comprising from 5 to 100 mol percent units of a diphenol or mixture of diphenols having the formula ##STR6## wherein R.sub.0, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 are independently selected from the group consisting of hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.5 -C.sub.12 aryl, and C.sub.6 -C.sub.12 aralkyl,
- X represents carbon,
- m is an integer of from 4 to 7,
- and R.sub.8 and R.sub.9 are independently selected for each X and independently selected of each other from the group consisting of hydrogen and C.sub.1 -C.sub.8 alkyl;
- from 0 to 95 mol percent 4,4'-isopropylidenediphenol units; and
- from 0 to 10 mol percent modifying glycol units having 2 to 16 carbons, wherein the total mol percent of diol units is equal to 100 mol percent; and
- (B) from 1 to 99 percent by weight of a polyester comprising
- (a) a dicarboxylic acid component comprising from 80 to 100 mol percent dicarboxylic acid units selected from the group consisting of terephthalic acid units, isophthalic acid units, and mixtures thereof; and from 0 to 20 mol percent modifying dicarboxylic acid units having from 2 to 20 carbons, wherein the total mol percent of dicarboxylic acid units is equal to 100 mol percent; and
- (b) a glycol component comprising from 10 to 99 mol percent 2,2,4,4-tetramethyl-1,3-cyclobutanediol units, from 1 to 90 mol percent 1,4-cyclohexanedimethanol units, and from 0 to 10 mol percent modifying glycol units having 2 to 16 carbons, wherein the total mol percent of glycol units is equal to 100 mol percent;
- wherein the total units of said polyester is equal to 200 mol percent; wherein said blend is clear and the total weight percent of said polycarbonate (A) and said polyester (B) is equal to 100 weight percent.
- 2. The composition of claim 1 wherein said polycarbonate (A) is present at from 40 to 99 weight percent, based on the weight of the blend composition, and said polyester (B) is present at from 1 to 60 weight percent, based on the weight of the blend composition.
- 3. The composition of claim 1, wherein said polycarbonate (A) is present in an amount of from 45 to 55 weight percent, based on the weight of the blend composition, and said polyester is present in an amount of from 45 to 55 weight percent, based on the weight of the blend composition.
- 4. The composition of claim 1, wherein said diol component contains from 30 to 35 mol percent diphenol (I) units and from 65 to 70 mol percent 4,4'-isopropylidenediphenol units.
- 5. The composition of claim 1 wherein said diol component of said polycarbonate contains from 10 to 90 mol percent diphenol (I) units and from 10 to 90 mol percent 4,4'-isopropylidenediphenol units.
- 6. The composition of claim 3 wherein said diol component contains from 20 to 50 mol percent diphenol (I) units and from 50 to 80 mol percent 4,4'-isopropylidenediphenol units.
- 7. The composition of claim 1 wherein the dicarboxylic acid component of the polyester portion comprises from 70 to 100 mol percent terephthalic acid and from 0 to 30 mol percent isophthalic acid.
- 8. The composition of claim 1 wherein said dicarboxylic acid component of said polyester portion contains 100 mol percent terephthalic acid units.
- 9. The composition of claim 1 wherein said glycol component of said polyester consists essentially of 2,2,4,4-tetramethyl-1,3-cyclobutanediol units and 1,4-cyclohexanedimethanol units.
- 10. The composition of claim 1 wherein the 2,2,4,4-tetramethyl-1,3-cyclobutanediol consists of 50 percent cis isomer and 50 percent trans isomer, where the total of the cis and trans isomer is equal to 100 mol percent.
- 11. The composition of claim 1 wherein the 1,4-cyclohexanedimethanol consists of about 70 percent trans and about 30 percent cis isomer.
- 12. The composition of claim 1 wherein the 1,4-cyclohexanedimethanol are from 50 to 80 mol percent trans isomer.
- 13. The composition of claim 1 wherein said glycol component of said polyester is about 20 to 80 mol percent 2,2,4,4-tetramethyl-1,3-cyclobutanediol units and from 20 to 80 mol percent 1,4-cyclohexanedimethanol units.
- 14. The composition of claim 1 wherein said glycol component of said polyester is from 30 to 70 mol percent 2,2,4,4-tetrarnethyl-1,3-cyclobutanediol units and from 30 to 70 mol percent 1,4-cyclohexanedimethanol units.
- 15. The composition of claim 1 wherein said modifying dicarboxylic acid units of said polyester are selected from the group consisting of 4,4'-biphenyldicarboxylic acid; 1,4-, 1,5-, 2,6-, 2,7-naphthalenedicarboxylic acid; 4,4'-oxydibenzoic acid; trans-4,4'-stilbenedicarboxylic acid; oxalic acid; malonic acid; succinic acid; glutaric acid; adipic acid; pimelic acid; suberic acid; azelaic acid; sebacic acid; and mixtures thereof.
- 16. The composition of claim 1 wherein said modifying glycol units of said polyester are selected from the group consisting of ethylene glycol, 1,2-propanediol, 1,3-propanediol, neopentyl glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, p-xylene glycol, and mixtures thereof.
- 17. The composition of claim 1 wherein said diphenol of formula (I) is a cyclohexyl diphenol having the formula ##STR7## wherein R.sub.0, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 are independently selected from the group consisting of hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.5 -C.sub.12 aryl, and C.sub.6 -C.sub.12 aralkyl.
- 18. The composition of claim 17 wherein said cyclohexyl diphenol is 3,3,5-trimethylcyclohexane bisphenol.
- 19. The composition of claim 1 wherein said blend composition has a single glass transition temperature.
- 20. The composition of claim 1 wherein said polycarbonate has an inherent viscosity of at least 0.3 dL/g at 25.degree. C. and said polyester has an inherent viscosity of at least 0.3 dL/g at 25.degree. C.
- 21. A clear article of manufacture made from the composition according to claim 1.
- 22. A method of using the blend of claim 1 to produce a clear article of manufacture comprising
- (a) blending polycarbonate (A) and polyester (B);
- (b) before, during or after the blending, melting polycarbonate (A) and polyester (B) to form, after the blending and melting, a melt blend;
- (c) then cooling the melt blend to form a clear blend composition.
- 23. A clear article of manufacture made from the composition according to claim 1.
- 24. A clear article of manufacture made form the composition of claim 1, selected from the group consisting of molded articles, fiber, films and sheeting.
- 25. A blend composition comprising:
- (A) from 1 to 99 percent by weight of a polycarbonate comprising a diol component comprising from 5 to 100 mol percent units of a diphenol or mixture of diphenols having the formula ##STR8## wherein R.sub.0, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 are independently selected from the group consisting of hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.12 cycloalkyl,
- C.sub.5 -C.sub.12 aryl, and C.sub.6 -C.sub.12 aralkyl,
- X represents carbon,
- m is an integer of from 4 to 7,
- and R.sub.8 and R.sub.9 are independently selected for each X and independently selected of each other from the group consisting of hydrogen and C.sub.1 -C.sub.8 alkyl;
- from 0 to 95 mol percent 4,4'-isopropylidenediphenol units; and
- from 0 to 10 mol percent modifying glycol units having 2 to 16 carbons, wherein the total mol percent of diol units is equal to 100 mol percent; and
- (B) from 1 to 99 percent by weight of a polyester comprising
- (a) a dicarboxylic acid component comprising from 80 to 100 mol percent dicarboxylic acid units selected from the group consisting of terephthalic acid units, isophthalic acid units, and mixtures thereof; and from 0 to 20 mol percent modifying dicarboxylic acid units having from 2 to 20 carbons, wherein the total mol percent of dicarboxylic acid units is equal to 100 mol percent; and
- (b) a glycol component comprising from 10 to 100 mol percent 2,2,4,4-tetramethyl-1,3-cyclobutanediol units, from 0 to 90 mol percent 1,4-cyclohexanedimethanol units, and from 0 to 10 mol percent modifying glycol units having 2 to 16 carbons, wherein the total mol percent of glycol units is equal to 100 mol percent;
- wherein the total units of said polyester is equal to 200 mol percent; wherein said blend is clear and the total weight percent of said polycarbonate (A) and said polyester (B) is equal to 100 weight percent.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority to U.S. provisional application Ser. No. 60/034,993, filed Dec. 28, 1996, and the Ser. No. 60/034,993 application is herein incorporated by this reference in its entirety.
US Referenced Citations (19)
Non-Patent Literature Citations (1)
Entry |
Coover, Jr. et al., Copolyester Molding Composition, United States Patent Office, Defensive Publication T875,010, published Jun. 9, 1970 (875-O.G. 842). |