ELECTRICAL TRACKING RESISTANCE COMPOSITIONS, METHODS & ARTICLES OF MANUFACTURE

• US 20120248102A1
• Filed: 08/11/2011
• Published: 10/04/2012
• Est. Priority Date: 03/31/2011
• Status: Active Grant

• Current Assignee: SHPP Global Technologies BV (Government of Saudi Arabia)
• Original Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Inventors: van de Wetering, Karin, Sybert, Paul D., van de Grampel, Robert D., Pal, Jaykisor, Van Zyl, Andries J. P.
• Granted Patent: US 8,703,855 B2
• Time in Patent Office: Days
• US Class Current: 220/3.2
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 5/0066 Flame-proofing or flame-retarding additives
• CPC Class Codes: C08K 9/06 with silicon-containing compounds
• CPC Class Codes: C08L 27/18 Homopolymers or copolymers or tetrafluoroethene
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• CPC Class Codes: C08L 69/00 Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• CPC Class Codes: C08L 83/10 Block- or graft-copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00

Abstract

This disclosure relates to polycarbonate compositions, methods, and articles of manufacture that at least meets certain electrical tracking resistance requirements. The compositions, methods, and articles of manufacture that meet these requirements contain at least a polycarbonate; a polysiloxane block co-polycarbonate; and a transition metal oxide, e.g. titanium dioxide.

Claims

1. A composition comprising:

a polycarbonate that is a not a polysiloxane block-co-polycarbonate;

a polysiloxane block co-polycarbonate;

a transition metal oxide;

optionally a brominated organic flame retardant;

optionally a fluorinated polyolefin;

optionally an additive that imparts a desired performance property; and

optionally a carbon black containing material, wherein the composition has a notched izod impact at −

30°

C. of at least 35 kJ/m² at a thickness of 3.0 mm according to ISO-180 standard with a 5.5 J hammer and further wherein the composition does not show tracking through at least 50 drops of a 0.1% aqueous ammonium chloride at 250V according to ASTM D-3638.

2. The composition of claim 1, wherein the polycarbonate is derived from a bisphenol comprising Bisphenol-A.

3. The composition of claim 1, wherein the polysiloxane block co-polycarbonate is derived from at least Bisphenol-A or dihydroxy aromatic containing unit(s), and polysiloxane bisphenol having the structure 1,

4. The composition of claim 3, wherein the average value of E of structure 1 is 20 to 60.

5. The composition of claim 3, wherein the average value of E of structure 1 is 30 to 50.

6. The composition of claim 1, wherein the transition metal oxide is a titanium dioxide and optionally wherein the titanium dioxide has an average particle size is greater than 50 nm and less than 350 nm.

7. The composition of claim 6, wherein the titanium dioxide is an inorganic coated titanium dioxide without an organic coating.

8. The composition of claim 6, wherein the titanium dioxide is an organic coated titanium dioxide with an organic coating.

9. The composition of claim 8, wherein the organic coating is a polysiloxane coating.

10. The composition of claim 1, wherein the brominated organic flame retardant has a bromine content of between 0.3 wt % and 10 wt % bromine atoms based on the total weight of the composition.

11. The composition of claim 1, wherein the brominated organic flame retardant has a bromine content of between 2 wt % and 6 wt % bromine atoms based on the total weight of the composition

12. The composition of claim 1, wherein the transitional metal oxide is chromium dioxide.

13. The composition of claim 1, wherein the polysiloxane block co-polycarbonate is derived from at least Bisphenol-A or dihydroxy aromatic containing unit(s), and polysiloxane bisphenol having the structure 3:

14. The composition of claim 13, wherein said transitional metal oxide is titanium dioxide with an average particle size of greater than or equal to 100 nm or less than 350 nm.

20. The composition of claim 1, wherein the polysiloxane block co-polycarbonate is derived from at least Bisphenol-A or dihydroxy aromatic containing unit(s), and a polysiloxane bisphenol having the structure

21. The composition of claim 6, wherein the polysiloxane block co-polycarbonate is derived from at least Bisphenol-A or dihydroxy aromatic containing unit(s), and a polysiloxane bisphenol having the structure

32. The composition of claim 1, wherein the wt % of the carbon black in the composition is less than 1 wt % based on the total weight of the composition.

33. The composition of claim 1, wherein the wt % of the carbon black in the composition is less than 0.5 wt % based on the total weight of the composition.

34. An article of manufacture containing the composition of claim 1.

35. An insulating material comprising the composition of claim 1.

36. The article of claim 34, wherein said article is selected from at least one of the following:

a solar apparatus, an electrical junction box, an electrical connector, an electrical vehicle charger, an outdoor electrical enclosure, a smart meter enclosure, a smart grid power node, PV frame and MCBs.

37. A junction box housing containing the composition of claim 1.

38. A method of controlling the tracking of an electrical current of an article of manufacture containing a polycarbonate containing material comprising:

providing a composition of claim 1; and

processing said polycarbonate containing material to form an article of manufacture.

39. The method of claim 38, wherein said article is selected from at least one of the following:

a solar apparatus, an electrical junction box, an electrical connector, an electrical vehicle charger, an outdoor electrical enclosure, a smart meter enclosure, a smart grid power node, PV frame and MCBs, a smart grid power node.

40. A method of controlling the tracking of an electrical current of an article of manufacture containing a polycarbonate containing material comprising:

providing a composition of claim 1; and

processing said polycarbonate containing material to form an article of manufacture.

15. A composition comprising:

a polycarbonate that is a not a polysiloxane block-co-polycarbonate;

5 to 30 wt % of a polysiloxane block co-polycarbonate;

3 to 40 wt % of a transitional metal oxide;

optionally a brominated organic flame retardant;

optionally a fluorinated polyolefin;

optionally an additive that imparts a performance property; and

optionally a carbon black containing material, wherein the composition has a notched izod impact of at −

30°

C. of at least 35 kJ/m² at a thickness of 3.0 mm according to ISO-180 standard with a 5.5 J hammer and further wherein the composition does not show tracking through at least 50 drops of a 0.1% aqueous ammonium chloride solution at 250V according to ASTM D-3638.

16. The composition of claim 15, wherein said transitional metal oxide is titanium dioxide.

17. The composition of claim 15, wherein the polysiloxane block co-polycarbonate is derived from at least Bisphenol-A or dihydroxy aromatic containing unit(s), and polysiloxane bisphenol having the structure 3:

18. The composition of claim 15, wherein said metal oxide is titanium dioxide.

19. The composition of claim 15, wherein said composition has 7.5 to 25 wt % of a polysiloxane block co-polycarbonate;

5 to 15 wt % of titanium dioxide;

optionally 2 to 6 wt % of bromine or halogen atoms; and

optionally 0.1 to 0.5 wt % of a fluorinated polyolefin.

22. The composition of claim 15, wherein the polysiloxane block co-polycarbonate is derived from at least Bisphenol-A or dihydroxy aromatic containing unit(s) and a polysiloxane bisphenol having the structure

23. The composition of claim 15, wherein the wt % of the carbon black in the composition is less than 1 wt % based on the total weight of the composition.

24. The composition of claim 15, wherein the wt % of the carbon black in the composition is less than 0.5 wt % based on the total weight of the composition.

25. An article of manufacture containing the composition of claim 15.

26. An insulating material comprising the composition of claim 15.

27. The article of claim 25, wherein said article is selected from at least one of the following:

a solar apparatus, an electrical junction box, an electrical connector, an electrical vehicle charger, an outdoor electrical enclosure, a smart meter enclosure, a smart grid power node, PV frame and MCBs.

28. A junction box housing containing the composition of claim 15.

29. A method of controlling the tracking of an electrical current of an article of manufacture containing a polycarbonate containing material comprising:

providing a composition of claim 15; and

processing said polycarbonate containing material to form an article of manufacture.

30. The method of claim 29, wherein said article is selected from at least one of the following:

a solar apparatus, an electrical junction box, an electrical connector, an electrical vehicle charger, an outdoor electrical enclosure, a smart meter enclosure, a smart grid power node, PV frame and MCBs, a smart grid power node.

31. A method of controlling the tracking of an electrical current of an article of manufacture containing a polycarbonate containing material comprising:

providing a composition of claim 15; and

processing said polycarbonate containing material to form an article of manufacture.