Polysiloxane-polycarbonate copolymer article

Abstract

Disclosed herein are polysiloxane-polycarbonate copolymer articles. In one embodiment, a ⅛th inch thick bar formed from the thermoplastic composition has a B-Y ratio of less than or equal to about 1.75. This article, which has a dimension that is greater than or equal to 1.5 cm, comprises the thermoplastic composition which comprises a polysiloxane-polycarbonate copolymer, wherein the copolymer comprises repeating diorganosiloxane units of formula (1): wherein each R is, independently, a C1-13 monovalent organic group; and E has an average value of 20 to 35.

1. An article, comprising:
 a thermoplastic composition comprising 
 a polysiloxane-polycarbonate copolymer, wherein the copolymer comprises repeating diorganosiloxane units of formula (1 13): 
 
       
         
           
           
               
               
           
         
         
           wherein each R is, independently, a C 1-13  monovalent organic group, each occurrence of R 1  is independently a divalent C 1 -C 30  alkylene, and E has an average value of about 20 to about 35; 
         
         wherein the article is transparent and has a dimension that is greater than or equal to about 1.5 cm; 
         wherein the thermoplastic composition is defined in that an ⅛ th  inch thick bar formed from the thermoplastic composition has a B-Y ratio of less than or equal to about 1.75, wherein the B-Y ratio is determined as a B-Y span of a molded part formed from the thermoplastic composition divided by a B-Y span of a molded part formed from a siloxane-free thermoplastic composition, the siloxane-free thermoplastic composition having a composition identical to that of the thermoplastic composition except for the omission of the diorganosiloxane units; and 
         wherein the thermoplastic composition has about 2 wt % to about 6 wt % polysiloxane amount of siloxane in the polycarbonate-polysiloxane copolymer is from about 0.5 wt. % to about 7 wt %, based on the total weight of the copolymer. 
       
     
     
       2. The article of  claim 1 , wherein the bar has 100% ductility at −20° C. in accordance with ASTM D256-05 with an impact energy of at least 10 ft-lb/in. 
     
     
       3. The article of  claim 2 , wherein the bar has 100% ductility at −30° C. 
     
     
       4. The article of  claim 1 , wherein the B-Y ratio is less than or equal to about 1.6. 
     
     
       5. The article of  claim 4 , wherein the B-Y ratio is less than or equal to about 1.5. 
     
     
       6. The article of  claim 5 , wherein the B-Y ratio is less than or equal to about 1.2. 
     
     
       7. The article of  claim 1 , wherein the dimension is greater than or equal to about 2.5 cm. 
     
     
       8. The article of  claim 1 , wherein the thermoplastic composition comprises amount of siloxane in the polycarbonate-polysiloxane copolymer is about 3 wt % to about 5 wt % polysiloxane, based on the total weight of the copolymer. 
     
     
       9. The article of  claim 1 , wherein the E has an average value of about 25 to about 35. 
     
     
       10. The article of  claim 9 , wherein the E has an average value of about 30 to about 35. 
     
     
       11. The article of  claim 9 , wherein the E has an average value of about 25 to about 30. 
     
     
       12. An article, comprising:
 a thermoplastic composition comprising 
 a polysiloxane-polycarbonate copolymer, wherein the copolymer comprises repeating diorganosiloxane units of formula (1 13): 
 
       
         
           
           
               
               
           
         
         
           wherein each R is, independently, a C 1-13  monovalent organic group, each occurrence of R 1  is independently a divalent C 1 -C 30  alkylene, and E has an average value of about 25 to about 35; 
         
         wherein the article has a dimension having a cross-section that is greater than or equal to 1.5 cm; and 
         wherein the composition is defined in that a ⅛ th  inch thick bar formed from the thermoplastic composition has a B-Y ratio of less than or equal to about 1.6, wherein the B-Y ratio is determined as a B-Y span of a molded part formed from the thermoplastic composition divided by a B-Y span of a molded part formed from a siloxane-free thermoplastic composition, the siloxane-free thermoplastic composition having a composition identical to that of the thermoplastic composition except for the omission of the diorganosiloxane units. 
       
     
     
       13. The article of  claim 12 , wherein the bar has 100% ductility at −0° C. in accordance with ASTM D256-05 with an impact energy of at least 10 ft-lb/in. 
     
     
       14. The article of  claim 13 , wherein the bar has 100% ductility at −10° C. in accordance with ASTM D256-05 with an impact energy of at least 10 ft-lb/in. 
     
     
       15. The article of  claim 12 , wherein the thermoplastic composition comprises amount of siloxane in the polycarbonate-polysiloxane copolymer is about 2 wt % to about 5 wt % polysiloxane, based upon a total weight of the copolymer. 
     
     
       16. The article of  claim 15 , wherein the thermoplastic composition comprises amount of siloxane in the polycarbonate-polysiloxane copolymer is about 3 wt % to about 5 wt % polysiloxane, based on the total weight of the copolymer. 
     
     
       17. The article of  claim 15 , wherein the E has an average value of about 30 to about 35. 
     
     
       18. The article of  claim 15 , wherein the E has an average value of about 25 to about 30. 
     
     
       19. The article of  claim 15 , wherein the B-Y ratio is less than or equal to about 1.5. 
     
     
       20. The article of  claim 15 , wherein the B-Y ratio is less than or equal to about 1.2. 
     
     
       21. A method of forming an article, the method comprising:
 disposing a thermoplastic composition, the thermoplastic composition comprising a polysiloxane-polycarbonate copolymer, wherein the copolymer comprises repeating diorganosiloxane units of formula (13): 
 
       
         
           
           
               
               
           
         
       
       wherein each R is, independently, a C 1-13  monovalent organic group, each occurrence of R 1  is independently a divalent C 1 -C 30  alkylene, and E has an average value of greater than or equal to 20 to less than or equal to 35; wherein the article is transparent and has a dimension that is greater than or equal to about 1.5 cm; wherein the thermoplastic composition is defined in that an ⅛ th  inch thick bar formed from the thermoplastic composition has a B-Y ratio of less than or equal to about 1.75, wherein the B-Y ratio is determined as a B-Y span of a molded part formed from the thermoplastic composition divided by a B-Y span of a molded part formed from a siloxane-free thermoplastic composition, the siloxane-free thermoplastic composition having a composition identical to that of the thermoplastic composition except for the omission of the diorganosiloxane units; and wherein the thermoplastic composition has about 2 wt % to about 6 wt % polysiloxane amount of siloxane in the polycarbonate-polysiloxane copolymer is from about 0.5 wt. % to about 7 wt %, based on the total weight of the copolymer; and
 forming an article. 
 
     
     
       22. The article of claim 1, wherein the copolymer comprises repeating diorganosiloxane units of the formula: 
       
         
           
           
               
               
           
         
         wherein R and E are as defined above, R 2  is a divalent C 2 -C 8  aliphatic group, each M is independently halogen, cyano, nitro, C 1 -C 8  alkylthio, C 1 -C 8  alkyl, C 1 -C 8  alkoxy, C 2 -C 8  alkenyl, C 2 -C 8  alkenyloxy group, C 3 -C 8  cycloalkyl, C 3 -C 8  cycloalkoxy, C 6 -C 10  aryl, C 6 -C 10  aryloxy, C 7 -C 12  aralkyl, C 7 -C 12  aralkoxy, C 7 -C 12  alkylaryl, or C 7 -C 12  alkylaryloxy, and each n is independently 0, 1, 2, 3, or 4. 
       
     
     
       23. The article of claim 22, wherein the E has an average value of about 25 to about 35. 
     
     
       24. The article of claim 22, wherein the polysiloxane-polycarbonate copolymer includes a chain stopper. 
     
     
       25. The article of claim 24, wherein the chain stopper is selected from the group consisting of phenol, p-cumyl phenol, tertiary-butyl phenol, and mixtures comprising at least one of the foregoing. 
     
     
       26. The article of claim 22, wherein the polysiloxane-polycarbonate copolymer has a molecular weight of about 20,000 to about 50,000. 
     
     
       27. The article of claim 22, wherein the polysiloxane-polycarbonate copolymer has a melt volume flow rate of about 8 to about 40 cm 3 /10 min. 
     
     
       28. The article of claim 12, wherein the copolymer comprises repeating diorganosiloxane units of the formula: 
       
         
           
           
               
               
           
         
         wherein R and E are as defined above, R 2  is a divalent C 2 -C 8  aliphatic group, each M is independently halogen, cyano, nitro, C 1 -C 8  alkylthio, C 1 -C 8  alkyl, C 1 -C 8  alkoxy, C 2 -C 8  alkenyl, C 2 -C 8  alkenyloxy group, C 3 -C 8  cycloalkyl, C 3 -C 8  cycloalkoxy, C 6 -C 10  aryl, C 6 -C 10  aryloxy, C 7 -C 12  aralkyl, C 7 -C 12  aralkoxy, C 7 -C 12  alkylaryl, or C 7 -C 12  alkylaryloxy, and each n is independently 0, 1, 2, 3, or 4. 
       
     
     
       29. The article of claim 28, wherein the polysiloxane-polycarbonate copolymer includes a chain stopper. 
     
     
       30. The article of claim 29, wherein the chain stopper is selected from the group consisting of phenol, p-cumyl phenol, tertiary-butyl phenol, and mixtures comprising at least one of the foregoing. 
     
     
       31. The article of claim 28, wherein the polysiloxane-polycarbonate copolymer has a molecular weight of about 20,000 to about 50,000. 
     
     
       32. The article of claim 28, wherein the polysiloxane-polycarbonate copolymer has a melt volume flow rate of about 8 to about 40 cm 3 /10 min. 
     
     
       33. The method of claim 21, wherein the copolymer comprises repeating diorganosiloxane units of the formula: 
       
         
           
           
               
               
           
         
         wherein R and E are as defined above, R 2  is a divalent C 2 -C 8  aliphatic group, each M is independently halogen, cyano, nitro, C 1 -C 8  alkylthio, C 1 -C 8  alkyl, C 1 -C 8  alkoxy, C 2 -C 8  alkenyl, C 2 -C 8  alkenyloxy group, C 3 -C 8  cycloalkyl, C 3 -C 8  cycloalkoxy, C 6 -C 10  aryl, C 6 -C 10  aryloxy, C 7 -C 12  aralkyl, C 7 -C 12  aralkoxy, C 7 -C 12  alkylaryl, or C 7 -C 12  alkylaryloxy, and each n is independently 0, 1, 2, 3, or 4. 
       
     
     
       34. The method of claim 33, wherein the E has an average value of about 25 to about 35. 
     
     
       35. The method of claim 33, wherein the polysiloxane-polycarbonate copolymer includes a chain stopper. 
     
     
       36. The method of claim 35, wherein the chain stopper is selected from the group consisting of phenol, p-cumyl phenol, tertiary-butyl phenol, and mixtures comprising at least one of the foregoing. 
     
     
       37. The method of claim 33, wherein the polysiloxane-polycarbonate copolymer has a molecular weight of about 20,000 to about 50,000. 
     
     
       38. The method of claim 33, wherein the polysiloxane-polycarbonate copolymer has a melt volume flow rate of about 8 to about 40 cm 3 /10 min. 
     
     
       39. An article, comprising:
 a thermoplastic composition comprising   a polysiloxane-polycarbonate copolymer, wherein the copolymer comprises repeating diorganosiloxane units of the formula (14):   
       
         
           
           
               
               
           
         
         wherein each R is, independently, a C 1-13  monovalent organic group, E has an average value of about 20 to about 35, R 2  is a divalent C 2 -C 8  aliphatic group, each M is independently halogen, cyano, nitro, C 1 -C 8  alkylthio, C 1 -C 8  alkyl, C 1 -C 8  alkoxy, C 2 -C 8  alkenyl, C 2 -C 8  alkenyloxy group, C 3 -C 8  cycloalkyl, C 3 -C 8  cycloalkoxy, C 6 -C 10  aryl, C 6 -C 10  aryloxy, C 7 -C 12  aralkyl, C 7 -C 12  aralkoxy, C 7 -C 12  alkylaryl, or C 7 -C 12  alkylaryloxy, and each n is independently 0, 1, 2, 3, or 4; 
         wherein the article is transparent and has a dimension that is greater than or equal to about 1.5 cm; 
         wherein the thermoplastic composition is defined in that an ⅛ th  inch thick bar formed from the thermoplastic composition has a B-Y ratio of less than or equal to about 1.75, wherein the B-Y ratio is determined as a B-Y span of a molded part formed from the thermoplastic composition divided by a B-Y span of a molded part formed from a siloxane-free thermoplastic composition, the siloxane-free thermoplastic composition having a composition identical to that of the thermoplastic composition except for the omission of the diorganosiloxane units. 
       
     
     
       40. The article of claim 39, wherein the E has an average value of about 25 to about 35. 
     
     
       41. The article of claim 39, wherein the polysiloxane-polycarbonate copolymer has a molecular weight of about 20,000 to about 50,000. 
     
     
       42. The article of claim 39, wherein the polysiloxane-polycarbonate copolymer has a melt volume flow rate of about 8 to about 40 cm 3 /10 min. 
     
     
       43. An article, comprising:
 a thermoplastic composition comprising   a polysiloxane-polycarbonate copolymer, wherein the copolymer comprises repeating diorganosiloxane units of the formula (14):   
       
         
           
           
               
               
           
         
         wherein each R is, independently, a C 1-13  monovalent organic group, E has an average value of about 20 to about 35, R 2  is a divalent C 2 -C 8  aliphatic group, each M is independently halogen, cyano, nitro, C 1 -C 8  alkylthio, C 1 -C 8  alkyl, C 1 -C 8  alkoxy, C 2 -C 8  alkenyl, C 2 -C 8  alkenyloxy group, C 3 -C 8  cycloalkyl, C 3 -C 8  cycloalkoxy, C 6 -C 10  aryl, C 6 -C 10  aryloxy, C 7 -C 12  aralkyl, C 7 -C 12  aralkoxy, C 7 -C 12  alkylaryl, or C 7 -C 12  alkylaryloxy, and each n is independently 0, 1, 2, 3, or 4; and 
         a chain stopper; 
         wherein the article is transparent and has a dimension that is greater than or equal to about 1.5 cm; 
         wherein the thermoplastic composition is defined in that an ⅛ th  inch thick bar formed from the thermoplastic composition has a B-Y ratio of less than or equal to about 1.75, wherein the B-Y ratio is determined as a B-Y span of a molded part formed from the thermoplastic composition divided by a B-Y span of a molded part formed from a siloxane-free thermoplastic composition, the siloxane-free thermoplastic composition having a composition identical to that of the thermoplastic composition except for the omission of the diorganosiloxane units. 
       
     
     
       44. The article of claim 43, wherein the chain stopper is selected from the group consisting of phenol, p-cumyl phenol, tertiary-butyl phenol, and mixtures comprising at least one of the foregoing. 
     
     
       45. The article of claim 43, wherein the E has an average value of about 25 to about 35. 
     
     
       46. The article of claim 43, wherein the polysiloxane-polycarbonate copolymer has a molecular weight of about 20,000 to about 50,000. 
     
     
       47. The article of claim 43, wherein the polysiloxane-polycarbonate copolymer has a melt volume flow rate of about 8 to about 40 cm 3 /10 min.