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

• US 20180051173A1
• Filed: 02/22/2016
• Published: 02/22/2018
• Est. Priority Date: 02/23/2015
• Status: Active Grant

• Current Assignee: SHPP Global Technologies BV
• Original Assignee: SABIC Global Technologies BV (Government of Saudi Arabia)
• Inventors: SHETH, Kapil Chandrakant, RAMALINGAM, Hariharan
• Granted Patent: US 10,457,809 B2
• Time in Patent Office: Days
• CPC Class Codes: C08G 73/1042 Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds
• CPC Class Codes: C08G 73/1046 Polyimides containing oxygen in the form of ether bonds in the main chain
• CPC Class Codes: C08G 73/106 containing silicon
• CPC Class Codes: C08G 73/1082 wholly aromatic in the tetracarboxylic moiety
• CPC Class Codes: C08G 77/455 containing polyamide, polyesteramide or polyimide sequences
• CPC Class Codes: C08K 2003/265 Calcium, strontium or barium carbonate
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08L 2201/02 Flame or fire retardant/resistant
• CPC Class Codes: C08L 2201/08 Stabilised against heat, light or radiation or oxydation
• CPC Class Codes: C08L 2203/20 use in electrical or conductive gadgets
• CPC Class Codes: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
• 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
• CPC Class Codes: H01B 3/305 Polyamides or polyesteramides
• CPC Class Codes: H01B 3/306 Polyimides or polyesterimides
• CPC Class Codes: H01B 3/421 Polyesters
• CPC Class Codes: H01B 3/46 silicones

Abstract

A poly(siloxane-etherimide) composition comprising, based on the total weight of the composition, 70 to 90 wt % of a poly(siloxane-etherimide); and an additive comprising a polyester, a filler, or a combination thereof; wherein the filler comprises talc, calcium carbonate, or a combination comprising at least one of the foregoing; and 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,to 90 wt % of a poly(siloxane-etherimide);

and

an additive comprising a polyester, a filler, or a combination thereof;

wherein the filler comprises talc, calcium carbonate, or a combination comprising at least one of the foregoing; and

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 comprising, based on the total weight of the composition:

75 to 90 wt % of a poly(siloxane-etherimide);

5 to 18 wt % of the filler; and

5 to 25 wt % of the polyester.

3. The composition of claim 1, wherein the composition has:

a tensile strength greater than or equal to 20 MPa determined according to ASTM D638;

a tensile modulus of greater than or equal to 600 GPa determined according to ASTM method D638;

an unnotched Izod impact of greater than or equal to 400 J/m, determined at room temperature on 3.2 millimeter thick bars as per ASTM D256; and

a melt flow rate of greater than or equal to 35 g/10 min, measured in accordance with ASTM D1238 at 337°

C., using a 6.7 kilogram (kg) weight.

4. The composition of claim 1 comprising, based on the total weight of the composition:

75 to 80 wt % of a poly(siloxane-etherimide); and

20 to 25 wt % of a polyester.

5. The composition of claim 4, wherein the composition has:

a tensile strength greater than or equal to 25 MPa determined according to ASTM D638;

a tensile modulus of greater than or equal to 800 GPa determined according to ASTM method D638;

an unnotched Izod impact of greater than or equal to 800 J/m, determined at room temperature on 3.2 millimeter thick bars as per ASTM D256; and

a melt flow rate of greater than or equal to 60 g/10 min, measured in accordance with ASTM D1238 at 337°

C., using a 6.7 kilogram (kg) weight.

6. The composition of claim 1 comprising, based on the total weight of the composition:

75 to 92 wt % of a poly(siloxane-etherimide); and

12 to 18 wt % of the filler.

7. The composition of claim 1, wherein the poly(siloxane-etherimide) comprises etherimide units of the formula

8. The composition of claim 7, wherein the poly(siloxane-etherimide) comprises units of the formula

9. The composition of claim 7, wherein

R is a divalent group of the formula

10. The composition of claim 9, wherein R is m-phenylene, Q is isopropylidene;

R′

is methyl; and

Z is

11. The composition of claim 1, wherein the poly(siloxane-etherimide) has a siloxane content of 20 to 45 wt. %, based on the total weight of the poly(siloxane-etherimide).

12. The composition of claim 1, wherein the polyester is a poly((C_2-6)alkylene terephthalate).

13. The composition of claim 12, wherein the polyester comprises poly(ethylene terephthalate), poly(butylene terephthalate), or a combination comprising at least one of the foregoing.

14. The composition of claim 1, further comprising an additive, wherein the additive is 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.

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

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

17. An article, wherein the article is 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.

18. An article comprising 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.

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.