Glossy colored injection molded article
View Patent ↗An injection molded article comprising a polycarbonate composition. The polycarbonate composition is scratch resistant, flame retardant, has a low chlorine and bromine content and is dark colored.
1. An injection molded article comprising a polycarbonate composition
wherein the polycarbonate composition comprises a colorant and has
a UL94 rating of V0 at a thickness of 1.5 millimeters;
a melt viscosity rate (MVR) greater than or equal to 10 milliliters per 10 minutes when determined using ISO 1133 at 300° C. and 1.2 kilograms;
a chlorine content of less than or equal to 100 parts by weight per million parts by weight of the polycarbonate composition; and
a bromine content of less than or equal to 100 parts by weight per million parts by weight of the polycarbonate composition; and
wherein the article, as molded and free of any coating, has
a scratch depth at 8 Newtons force of less than or equal to 20 micrometers; and
wherein the article has a DE* value less than or equal to 2.0 relative to an L* value of 26.989, an a* value of 0.287 and a b* value of −0.771 as determined by ISO 7724.
2. The article of claim 1 wherein the polycarbonate composition comprises a polycarbonate having repeating structural carbonate units of formula (1)
in which greater than or equal to 45 percent of the total number of R 1 groups are aromatic organic groups derived from a monomer of formula (2), a monomer of formula (3), a monomer of formula (4), or a combination comprising two or more of the foregoing,
wherein formula (2) is:
wherein R and R 2 are independently at each occurrence a C 1 -C 12 alkyl group, b has a value of 1 to 4, a has a value of 0 or 1 and Z is selected from the group consisting of C 5 -C 18 cycloalkyl groups attached to the phenyl rings at one or two carbons, C 1 -C 5 alkyl groups, C 6 -C 13 aryl groups, and C 7 -C 12 alkylaryl groups,
wherein formula (3) is:
wherein R and R 2 are independently at each occurrence a C 1 -C 12 alkyl, q and k independently have a value of 0 to 4 and T is selected from the group consisting of C 5 -C 18 cycloalkyl groups attached to the phenyl rings at one or two carbons, C 6 -C 12 aryl groups, and C 7 -C 13 alkylaryl groups, at least one of R and R 2 are located ortho to a hydroxyl group, and
wherein formula (4) is:
3. The article of claim 2 , wherein greater than or equal to 45 percent of the total number of R 1 groups are aromatic organic groups derived from one or more of the following monomers:
4. The article of claim 2 , wherein the polycarbonate is a copolycarbonate in which less than or equal to 55 percent of the total number of R 1 groups are derived from one or more of the following dihydroxy compounds: 1,1-bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxyphenyl)propane (hereinafter “bisphenol A” or “BPA”), 2,2-bis(4-hydroxyphenyl) butane, 2,2-bis(4-hydroxyphenyl)octane, 1,1-bis(4-hydroxyphenyl)propane, and 1,1-bis(4-hydroxyphenyl)n-butane.
5. The article of claim 2 , wherein the polymer further comprises repeating units of formula (5):
wherein the molar ratio of isophthalate units u to terephthalate units v is 91:9 to 2:98.
6. The article of claim 1 , wherein the scratch depth is less than or equal to 15 micrometers.
7. The article of claim 1 , wherein the scratch depth is less than or equal to 10 micrometers.
8. The article of claim 1 , wherein the chlorine content is less than or equal to 50 parts by weight per million parts by weight of the polycarbonate composition.
9. The article of claim 8 , wherein the chlorine content is less than or equal to 20 parts by weight per million parts by weight of the polycarbonate composition.
10. The article of claim 1 , wherein the bromine content is less than or equal to 50 parts by weight per million parts by weight of the polycarbonate composition.
11. The article of claim 10 , wherein the bromine content is less than or equal to 20 parts by weight per million parts by weight of the polycarbonate composition.
12. The article of claim 1 , wherein the DE* value is less than or equal to 1.5.
13. The article of claim 1 , wherein the DE* value is less than or equal to 1.0.
14. The article of claim 1 , wherein the article is a bezel.
15. The article of claim 14 , wherein the bezel has a width of 30 to 100 centimeters, a height of 20 to 90 centimeters, an inner diagonal length of 3 to 120 centimeters, and an outer diagonal length of 5 to 150 centimeters.
16. The article of claim 14 , wherein the bezel has a thickness of 1.0 to 5.0 millimeters.
17. The article of claim 14 , wherein the bezel has a weight of 1 to 1000 grams.
18. The article of claim 1 , wherein the polycarbonate composition is free of fillers.
19. A bezel comprising
a polycarbonate composition,
wherein the polycarbonate composition has
a UL94 rating of VO at a thickness of 1.5 millimeters;
a melt viscosity rate of 10 to 16 millimeters per 10 minutes when determined according to ISO 1133 at 300° C. and 1.2 kilograms
a chlorine content less than or equal to 100 ppm
a bromine content less than or equal to 100 ppm
wherein the polycarbonate composition is free of any filler,
wherein the bezel, as molded and free of any coating, has
a scratch depth of 8 Newtons force of less than or equal to 20 micrometers; and
a DE* value less than or equal to 1.0 relative to an L* value of 26.989, an a* value of 0.287, and a b* value of −0.771 as determined according to ISO 7724.
20. The bezel of claim 19 , wherein the polycarbonate composition comprises a polycarbonate, a flame retardant, and a colorant.
21. The bezel of claim 19 , wherein the polycarbonate composition comprises a polycarbonate, an anti-drip agent, and a colorant.
22. The bezel of claim 21 , wherein the polycarbonate composition further comprises a flame retardant.
23. The bezel of claim 19 , wherein the bezel has a width of 30 to 100 centimeters, a height of 20 to 90 centimeters, an inner diagonal length of 3 to 120 centimeters, and an outer diagonal length of 5 to 150 centimeters.
24. The bezel of claim 19 , wherein the bezel has a thickness of 1.0 to 5.0 millimeters.
25. The bezel of claim 19 , wherein the bezel has a weight of 1 to 1000 grams.
26. An injection molded article comprising a polycarbonate composition
wherein the polycarbonate composition comprises a colorant and a polycarbonate of formula (1)
in which greater than or equal to 45 percent of the total number of R 1 groups are aromatic organic groups derived from a monomer of formula (2), a monomer of formula (3), a monomer of formula (4), or a combination comprising two or more of the foregoing,
wherein formula (2) is:
wherein R and R 2 are independently at each occurrence a C 1 -C 12 alkyl group, b has a value of 1 to 4, a has a value of 0 or 1 and Z is selected from the group consisting of C 5 -C 18 cycloalkyl groups attached to the phenyl rings at one or two carbons, C 1 -C 5 alkyl groups, C 6 -C 13 aryl groups, and C 7 -C 12 alkylaryl groups,
wherein formula (3) is:
wherein R and R 2 are independently at each occurrence a C 1 -C 12 alkyl, q and k independently have a value of 0 to 4 and T is selected from the group consisting of C 5 -C 18 cycloalkyl groups attached to the phenyl rings at one or two carbons, C 6 -C 12 aryl groups, and C 7 -C 13 alkylaryl groups, at least one of R and R 2 are located ortho to a hydroxyl group, and
wherein formula (4) is:
wherein the polycarbonate composition has
a UL94 rating of V0 at a thickness of 1.5 millimeters;
a melt viscosity rate (MVR) greater than or equal to 10 milliliters per 10 minutes when determined using ISO 1133 at 300° C. and 1.2 kilograms;
a chlorine content of less than or equal to 100 parts by weight per million parts by weight of the polycarbonate composition; and
a bromine content of less than or equal to 100 parts by weight per million parts by weight of the polycarbonate composition; and
wherein the article, as molded and free of any coating, has
a scratch depth at 8 Newtons force of less than or equal to 20 micrometers; and
wherein the article has a DE* value less than or equal to 2.0 relative to an L* value of 26.989, an a* value of 0.287 and a b* value of −0.771 as determined by ISO 7724.
27. The article of claim 26 , wherein in which greater than or equal to 45 percent of the total number of R 1 groups are aromatic organic groups derived from one or more of the following monomers:
28. The article of claim 27 , wherein the article is a bezel.
29. An injection molded article comprising a polycarbonate composition
wherein the polycarbonate composition comprises a colorant and a polycarbonate of formula (1)
in which greater than or equal to 45 percent of the total number of R 1 groups are aromatic organic groups derived from a monomer of formula
wherein the polycarbonate composition has
a UL94 rating of V0 at a thickness of 1.5 millimeters;
a melt viscosity rate (MVR) greater than or equal to 10 milliliters per 10 minutes when determined using ISO 1133 at 300° C. and 1.2 kilograms;
a chlorine content of less than or equal to 100 parts by weight per million parts by weight of the polycarbonate composition; and
a bromine content of less than or equal to 100 parts by weight per million parts by weight of the polycarbonate composition; and
wherein the article, as molded and free of any coating, has
a scratch depth at 8 Newtons force of less than or equal to 20 micrometers; and
wherein the article has a DE* value less than or equal to 2.0 relative to an L* value of 26.989, an a* value of 0.287 and a b* value of −0.771 as determined by ISO 7724.