Compositions and articles of manufacture containing siloxane
View Patent ↗Compositions containing a polycarbonate and a linear and cyclic phenyl containing siloxanes are disclosed. Specifically, a composition comprising: (a) a branched polycarbonate resin, (b) a flame retardant, (c) at least one linear phenyl containing siloxane and at least one cyclic phenyl containing siloxane, and (d) a linear polycarbonate resin when said branched polycarbonate is less than 100% based upon weight percent of total polycarbonate in said composition, wherein the amounts of said branched and linear polycarbonate resins, said linear siloxanes and cyclic siloxanes, and flame retardant are in amounts effective to provide a molded article from said composition with a UL94 V0 p(FTP) value of 0.90 or greater at a thickness of between 1 mm and 2.5 mm or at 2.5 mm or at 1.5 mm or at 1 mm is disclosed. In addition, a composition comprising: (a) a linear polycarbonate resin, (b) a flame retardant, (c) at least one phenyl-containing linear siloxane and at least one phenyl-containing cyclic siloxane, wherein the amounts of said linear polycarbonate resins, said phenyl-containing linear siloxanes and said phenyl-containing cyclic siloxanes, and said flame retardant are in amounts effective to provide a molded article of said composition with a UL94 V0 p(FTP) value of 0.90 or greater at a thickness of between 1 mm and 2.5 mm or at 2.5 mm or at 1.5 mm or at 1 mm is disclosed.
1. A composition comprising: (a) a branched polycarbonate resin, (b) a flame retardant, (c) at least one phenyl containing linear siloxane and at least one phenyl containing cyclic siloxane, and (d) a linear polycarbonate resin; wherein said branched polycarbonate is less than 100 wt % based upon the weight percent of total polycarbonate in said composition; wherein a molded article from said composition has a UL94 V0 p(FTP) value of 0.90 or greater at a thickness of between 1 mm and 2.5 mm;
wherein the phenyl containing cyclic siloxane is a cyclic siloxane having a formula (R′ 2 SiO) y , wherein R′ is a monovalent phenyl containing hydrocarbon or a fluorinated phenyl containing hydrocarbon having from 1 to 18 carbon atoms; and y is a number from 3 to 12; and
wherein the phenyl containing linear siloxane comprises a poly(phenylalkylsiloxane), wherein the poly(phenylalkylsiloxane) comprises an alkyl group having 1 to 18 carbon atoms;
wherein said composition has a haze value less than 3% at 3 mm thickness by ASTM D1003.
2. The composition of claim 1 , wherein branched polycarbonate resin has a weight average molecular weight of between about 26,000 and about 42,000 daltons based on polycarbonate standards.
3. The composition of claim 1 , wherein the branched polycarbonate resin comprises repeat units derived from a branching agent added during polymerization, wherein the branching agent is at least one of the following branching agents:
wherein Z is hydrogen, a halogen, C 1-3 alkyl group, C 1-3 alkoxy group, C 7-12 arylalkyl, alkylaryl, or nitro group, and z is 0 to 3;
wherein T is a C 1-20 alkyl group, C 1-20 alkyleneoxy group, C 7-12 arylalkyl, or alkylaryl group, S is hydrogen, a halogen, C 1-3 alkyl group, C 1-3 alkoxy group, C 7-12 arylalkyl, alkylaryl, or nitro group, s is 0 to 4.
4. The composition of claim 1 , wherein a branching level of said branched polycarbonate resin is from about 0.05 wt % to about 4.2 wt %.
5. The composition of claim 1 , wherein said branched polycarbonate has an end-cap containing at least one of the following: phenol, alkyl-substituted phenols, ester-substituted phenols, cyano-substituted phenols, and halogen substituted phenols.
6. The composition of claim 1 , wherein the linear polycarbonate resin has a weight average molecular weight of between about 26,000 and about 42,000 daltons based on polycarbonate standards.
7. The composition of claim 1 , wherein an extruded molded article from said composition has at least a UL94 V0 p(FTP) value of at least 0.9 at a thickness of 1.0 mm.
8. The composition of claim 1 , wherein an injection molded article from said composition has at least a UL94 V0 p(FTP) value of at least 0.9 at a thickness of 1.5 mm.
9. The composition of claim 1 , wherein said composition contains about 95 wt % or less of the linear polycarbonate resin based on the weight of the total polycarbonate.
10. The composition of claim 1 , wherein said total polycarbonate has about 5 wt % to about 70 wt % of the branched polycarbonate resin.
11. The composition of claim 1 , wherein said flame retardant contains a sulfonate salt or derivatives thereof.
12. The composition of claim 1 , wherein said flame retardant is a potassium perfluoroalkylsulfonate salt or derivatives thereof.
13. The composition of claim 1 , wherein said flame retardant is at least one of the following: potassium diphenylsulfon-3-sulfonate, sodium p-tolylsulfonate, and ionomer.
14. The composition of claim 1 , wherein said flame retardant does not contain a bromine and/or chlorine containing molecules.
15. The composition of claim 1 , wherein the phenyl containing cyclic siloxane comprises octaphenyl cyclotetrasiloxane, and wherein the phenyl containing linear siloxane comprises a poly(phenylmethylsiloxane) having the following structure
wherein R 1 is a C 1-18 alkyl group, R 2 is phenyl, and a ratio of x and y sums to 1.
16. The composition of claim 15 wherein said composition has between about 0.1 wt % and about 0.8 wt % poly(phenylmethylsiloxane) and about 0.1 wt % to 0.8 wt % octaphenyl cyclotetrasiloxane based on the total weight of the composition.
17. The composition of claim 16 , wherein said flame retardant is potassium perfluorobutane sulfonate or perfluoromethane sulfonate or mixtures thereof.
18. The composition of claim 1 , wherein the composition has a notched izod impact strength that is at least about 50 J/m.
19. The composition of claim 1 , wherein said composition has a melt flow range from about 3g /10min to less than about 45g/10min.
20. The composition of claim 1 , wherein said linear polycarbonate is about 70 wt % of an interfacial polycarbonate with a weight average molecular weight of 22000 g/mol and a melt flow of 21.9 to 31.8 g/10 min as determined by ASTM D 1238 and about 30 wt % Branched polycarbonate based upon weight of polycarbonate, a heat stabilizer in the amount of about 0.06 wt % of the total weight of the composition, potassium perfluorobutane sulfonate in the amount of about 0.08 wt % of the total weight of the composition, a poly(phenylmethylsiloxane) in the amount of about 0.4 wt % of the total weight of the composition, and octaphenyl cyclotetrasiloxane in the amount of about 0.1 wt % of the total weight of the composition.
21. An article of manufacture comprising the composition of claim 1 .
22. The article of claim 21 wherein said article is at least one of the following: a television, a light emitting diode, an electrical component, a laptop computer, and a smartphone.
23. The composition of claim 1 , wherein the molded article from said composition has a UL94 V0 p(FTP) value of 0.90 or greater at a thickness of 1.5 mm.
24. The composition of claim 1 , wherein said linear polycarbonate is about 70 wt % of an interfacial polycarbonate with a weight average molecular weight of 22000 g/mol and a melt flow of 21.9 to 31.8 g/10 min as determined by ASTM D 1238 and about 30 wt % branched polycarbonate based upon weight of polycarbonate, a heat stabilizer in the amount of about 0.06 wt % of the total weight of the composition, potassium perfluorobutane in the amount of about 0.08 wt % of the total weight of the composition, a poly(phenylmethylsiloxane) in the amount of about 0.4 wt % of the total weight of the composition, and octaphenyl cyclotetrasiloxane in the amount of about 0.1 wt % of the total weight of the composition, and wherein a molded article from said composition with a UL94 V0p(FTP) value of 0.90 or greater at a thickness of 1.5 mm.
25. The composition of claim 1 , wherein the molded article from said composition has a UL94 V0 p(FTP) value of 0.90 or greater at a thickness of 1 mm.
26. The composition of claim 1 , wherein a molded article from said composition has at least a UL94 V0 p(FTP) value of at least 0.9 at a thickness of 2.0 mm.
27. The composition of claim 1 , wherein said composition comprises between about 0.1 wt % and about 0.8 wt % of the phenyl containing linear siloxane based on the total weight of the composition.
28. A composition comprising: (a) a branched polycarbonate resin, (b) a flame retardant, (c) poly(phenylmethyl siloxane) and octaphenyl cyclotetrasiloxane, and (d) a linear polycarbonate resin; wherein said branched polycarbonate is less than 100 wt % based upon the weight percent of total polycarbonate in said composition; wherein a molded article from said composition has a UL94 V0 p(FTP) value of 0.90 or greater at a thickness of between 1 mm and 2.5 mm; wherein said composition has a haze value less than 3% at 3 mm thickness by ASTM D1003.
29. A composition comprising: (a) a branched polycarbonate resin, (b) a flame retardant, (c) at least one phenyl containing linear siloxane and at least one phenyl containing cyclic siloxane, and (d) a linear polycarbonate resin; wherein said branched polycarbonate is less than 100 wt % based upon the weight percent of total polycarbonate in said composition; wherein a molded article from said composition has a UL94 V0 p(FTP) value of 0.90 or greater at a thickness of between 1 mm and 2.5 mm;
wherein the phenyl containing cyclic siloxane is a cyclic siloxane having a formula (R′ 2 SiO) y , wherein R′ is a monovalent phenyl containing hydrocarbon or a fluorinated phenyl containing hydrocarbon having from 1 to 18 carbon atoms; and y is a number from 3 to 12; and
wherein the phenyl containing linear siloxane comprises a poly(phenylalkylsiloxane), wherein the poly(phenylalkylsiloxane) comprises an alkyl group having 1 to 18 carbon atoms;
wherein said polycarbonate comprises about 40 wt % of the linear polycarbonate based upon the weight of the polycarbonate with a weight average molecular weight of 22000 g/mol and a melt flow of 25 to 35 g/10 min as determined by ASTM D 1238 and about 60 wt % Branched polycarbonate based upon the weight of polycarbonate,
wherein the composition comprises a heat stabilizer in the amount of about 0.06 wt % of the total weight of the composition, potassium perfluorobutane sulfonate in the amount of about 0.08 wt % of the total weight of the composition, a poly(phenylmethylsiloxane) in the amount of 0.4 wt % of the total weight of the composition, and octaphenyl cyclotetrasiloxane in the amount of 0.1 wt % of the total weight of the composition.
30. The composition of claim 29 , wherein said composition has a haze value less than 3% at 3mm thickness by ASTM D1003.
31. A composition comprising: (a) a linear polycarbonate resin, (b) a flame retardant, (c) at least one phenyl-containing linear siloxane and at least one phenyl-containing cyclic siloxane, wherein a molded article from said composition has a UL94 V0p(FTP) value of 0.90 or greater at a thickness of between 1 mm and 2.5 mm;
wherein the phenyl-containing cyclic siloxane is a cyclic siloxane having a formula (R′ 2 SiO) y wherein R′ is a monovalent phenyl containing hydrocarbon or a fluorinated phenyl containing hydrocarbon having from 1 to 18 carbon atoms and y is a number from 3 to 12; and
wherein the phenyl-containing linear siloxane comprises a poly(phenylalkylsiloxane); wherein the poly(phenylalkylsiloxane) comprises an alkyl group having 1 to 18 carbon atoms;
wherein said composition has a haze value less than 3% at 3 mm thickness by ASTM D1003.
32. The composition of claim 31 , wherein said linear polycarbonate resin is a blend of linear polycarbonate resin.
33. The composition of claim 32 wherein at least one of the linear polycarbonates in the blend is bisphenol-A polycarbonate.
34. The composition of claim 33 wherein at least one of the linear polycarbonates is a copolycarbonate or a polycarbonate copolymer.
35. The composition of claim 32 , wherein a molded article from said composition with a UL94 V0 p(FTP) value of 0.90 or greater at a thickness of 1.5 mm.
36. The composition of claim 31 wherein the flame retardant is potassium perfluorobutane sulfonate.
37. The composition of claim 31 wherein the phenyl-containing linear siloxane has the structure
wherein R 1 is a C 1-18 alkyl group, R 2 is phenyl, and a ratio of sums to a value of 1,and wherein the phenyl-containing cyclic siloxane is octaphenylcyclotetrasiloxane.
38. The composition of claim 37 , wherein the phenyl-containing linear siloxane is a poly(phenylmethylsiloxane).
39. A molded article containing the composition of claim 31 .
40. The composition of claim 31 , wherein the molded article from said composition has a UL94 V0 p(FTP) value of 0.90 or greater at a thickness of 1.5 mm.