ELECTRICAL TRACKING RESISTANCE COMPOSITIONS, ARTICLES FORMED THEREFROM, AND METHODS OF MANUFACTURE THEREOF

• US 20190119449A1
• Filed: 02/22/2016
• Published: 04/25/2019
• Est. Priority Date: 02/23/2015
• Status: Active Grant

• Current Assignee: SHPP Global Technologies BV (Government of Saudi Arabia)
• Original Assignee: SABIC Global Technologies BV (Government of Saudi Arabia)
• Inventors: Sheth, Kapil Chandrakant, Ramalingam, Hariharan, Mediratta, Gaurav
• Granted Patent: US 10,647,815 B2
• Time in Patent Office: Days
• CPC Class Codes: C08G 73/1071 Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain
• CPC Class Codes: C08K 2003/2227 of aluminium
• CPC Class Codes: C08K 2003/2241 Titanium dioxide
• CPC Class Codes: C08K 2003/2244 of zirconium
• CPC Class Codes: C08K 2003/343 Peroxyhydrates, peroxyacids or salts thereof
• CPC Class Codes: C08K 2201/006 Additives being defined by their surface area
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08K 3/346 Clay
• CPC Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
• CPC Class Codes: H01B 19/00 Apparatus or processes specially adapted for manufacturing insulators or insulating bodies manufacture of porcelain for electric insulation C04B33/26
• CPC Class Codes: H01B 3/303 Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
• CPC Class Codes: H01B 3/427 Polyethers
• CPC Class Codes: Y10T 428/2993 Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
• CPC Class Codes: Y10T 428/31721 Of polyimide

Abstract

A composition comprises, based on the total weight of the composition, 50 wt % to 90 wt % of a polyetherimide; and 10 wt % to 50 wt % of a filler comprising talc, titanium dioxide, zirconium oxide, neutral aluminum oxide, or a combination comprising at least one of the foregoing; wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85.

Claims

1. A composition comprising, based on the total weight of the composition,wt % to 90 wt % of a polyetherimide;

and

10 wt % to 50 wt % of a filler comprising talc, titanium dioxide, zirconium oxide, neutral aluminum oxide, or a combination comprising at least one of the foregoing;

wherein the composition has a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85.

2. The composition of claim 1, wherein the composition has a tensile strength greater than or equal to 30 MPa determined according to ASTM D638 and a tensile modulus greater than equal to 4,000 GPa determined according to ASTM D638.

3. The composition of claim 1, wherein the degradation temperature difference between the polyetherimide and a blend of the polyetherimide and the filler is less than 10°

C.

4. The composition of claim 1, wherein the polyetherimide comprises units of the formula

5. The composition of claim 4, wherein

R is a divalent group of the formula

6. The composition of claim 4, wherein

at least 50 mole percent (mol %) of the R groups are bis(3,4′

-phenylene)sulfone, bis(3,3′

-phenylene)sulfone, or a combination comprising at least one of the foregoing and the remaining R groups are p-phenylene, m-phenylene or a combination comprising at least one of the foregoing;

and Z is 2,2-(4-phenylene)isopropylidene.

7. The composition of claim 1, wherein the filler comprises talc.

8. The composition of claim 7, wherein the talc has a D95 of 2 micrometers to 6 micrometers.

9. The composition of claim 1, comprising, based on the total weight of the composition,wt % to 65 wt % of a polyetherimide;

and

35 wt % to 50 wt % of talc having a D95 of 3.5 micrometers;

wherein the composition has;

a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85;

a tensile strength greater than or equal to 50 MPa determined according to ASTM D638; and

a tensile modulus of greater than or equal to 10,000 GPa determined according to ASTM method D638.

10. The composition of claim 1, comprising, based on the total weight of the composition,wt % to 70 wt % of a polyetherimide;

and

30 wt % to 50 wt % of talc having a D95 of 2.9 micrometers;

wherein the composition has;

a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85;

a tensile strength greater than or equal to 50 MPa determined according to ASTM D638; and

a tensile modulus of greater than or equal to 10,000 GPa determined according to ASTM method D638.

11. The composition of claim 1, comprising, based on the total weight of the composition,wt % to 60 wt % of a polyetherimide;

and

40 wt % to 50 wt % of talc having a D95 of 5.7 micrometers;

wherein the composition has;

a number of drops to tracking at 250 volts of greater than or equal to 50 drops according to ASTM D-3638-85;

a tensile strength greater than or equal to 50 MPa determined according to ASTM D638;

a tensile modulus of greater than or equal to 10,000 GPa determined according to ASTM method D638, and

a heat deflection temperature of greater than or equal to 200°

C. measured on 3.2 millimeter injection molded bar at 1.82 MPa stress according to ASTM D648.

12. The composition of claim 1, comprising, based on the total weight of the composition,wt % to 65 wt % of a polyetherimide sulfone;

and

35 wt % to 50 wt % of talc;

wherein the composition has;

a number of drops to tracking at 250 volts of greater than or equal to 50 drops determined according to ASTM D-3638-85;

a tensile strength greater than or equal to 40 MPa determined according to ASTM D638; and

a tensile modulus of greater than or equal to 11,000 GPa determined according to ASTM method D638,

wherein the polyetherimide sulfone comprises units of the formula

13. The composition of claim 1, further comprising an additive selected from a processing aid, a heat stabilizer, an ultraviolet light absorber, a colorant, a flame retardant, or a combination comprising at least one of the foregoing.

14. The composition of claim 13, comprising, based on the total weight of the composition, from 0.0001 to 20 wt % of each additive present in the composition.

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

16. An article selected from a molded article, a thermoformed article, an extruded film, an extruded sheet, one or more layers of a multi-layer article, a substrate for a coated article, and a substrate for a metallized article made from the composition of claim 1.

17. An article made from the composition of claim 1, wherein the article is 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, a photovoltaic frame and a miniature circuit breaker.

18. A method of manufacture of an article, comprising molding, extruding, or casting the composition of claim 1 to form the article.

19. A method of controlling the tracking of an electrical current of an article of manufacture, the method comprising:

providing a composition of claim 1, and processing the composition to form an article of manufacture.

20. The method of claim 19, wherein the article is 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, a photovoltaic frame and a miniature circuit breaker.