Sheets including polyphenylene and an aryl salicylate and methods of making the same

Patent metadata

Field	Value
Publication number	US-11713394-B2
Application number	US-201716474963-A
Country	US
Kind code	B2
Filing date	Dec 26, 2017
Priority date	Dec 28, 2016
Publication date	Aug 1, 2023
Grant date	Aug 1, 2023

Abstract

A sheet includes: a composition comprising about (60) to about (85) weight percent of polyphenylene, about (0) to about (10) weight percent of polystyrene, about (10) to about (20) weight percent of a hydrogenated block copolymer of an alkenyl aromatic compound and a conjugated diene, about (3) to about (10) weight percent of an aryl salicylate, and optionally, a flame retardant additive.

First claim

What is claimed is:

1. A composition, comprising:
67.90 to 72.6 weight percent of poly(phenylene ether),
15 to 20 weight percent of a hydrogenated block copolymer of an alkenyl aromatic compound and a conjugated diene,
4.7 to 5 weight percent of polysalicylate acetate, and
5 to 9.5 weight percent of a phosphorous-containing flame retardant additive, percentages based on 100 parts by weight total of the poly(phenylene ether), the hydrogenated block copolymer, the polysalicylate acetate, and the phosphorous-containing flame retardant additive,
wherein the hydrogenated block copolymer is a hydrogenated polystyrene-poly(ethylene-butylene)-polystyrene block copolymer having a weight average molecular weight of 100,000 to 150,000, and
wherein the phosphorous-containing flame retardant additive is bisphenol-A bis(diphenyl phosphate).

2. A sheet, comprising the composition of claim 1 .

3. The sheet of claim 2 , wherein the poly(phenylene ether) has an intrinsic viscosity of 0.25 to 0.50 deciliter per gram.

4. The sheet of claim 2 , wherein the composition further comprises an ultraviolet light stabilizer, an ultraviolet light absorber, or a combination comprising at least one of the foregoing.

5. The sheet of claim 2 , wherein the sheet has a Vicat Softening temperature of greater than or equal to 150° C.

6. The sheet of claim 2 , wherein a thickness of the sheet is 50 micrometers to 3 millimeters.

7. The sheet of claim 2 , wherein the sheet passes a mandrel bending test around a 0.25 inch diameter cylindrical rod without cracking after exposure to a temperature of 160° C. in air for 500 hours.

8. The sheet of claim 2 , wherein thermal shrinkage of the sheet at 150° C. for 30 minutes is less than or equal to 0.2% in the machine direction and less than or equal to 0.2% in the transverse direction.

9. The sheet of claim 2 , wherein the sheet has a UL94 rating of VTM1 at a thickness of 0.25 millimeters.

10. An article comprising the sheet of claim 2 , wherein the article is selected from a photovoltaic module, a solar hot water system, lithium-ion battery insulation, heat shielding, printed circuit board insulation, an aircraft interior application, a railcar interior application, business equipment insulation, a computer rack partition, or monitor insulation.

11. A method of making the sheet of claim 2 , comprising:
extruding the sheet, wherein the composition comprises 0 weight percent of polystyrene.

12. A backsheet for a photovoltaic module, comprising:
the sheet of claim 2 , wherein the composition comprises 0 weight percent of polystyrene.

13. The backsheet of claim 12 , wherein the composition comprises an ultraviolet light stabilizer.

14. The backsheet of claim 12 , wherein the backsheet passes a mandrel bending test around a 0.25 inch diameter cylindrical rod without cracking after exposure to a temperature of 160° C. in air for 500 hours.

15. The sheet of claim 2 , wherein the poly(phenylene ether) is capped with the polysalicylate acetate.

16. The sheet of claim 2 , wherein the sheet is formed by extrusion, wherein the composition comprises 0 weight percent of polystyrene.

17. The sheet of claim 2 , wherein the composition comprises 0 weight percent of polystyrene.

Assignees

• Sabic Global Technologies Bv

Inventors

• Zhou Jian
• Levasalmi Juha-Matti

Classifications

• H10F19/85 Primary

  Protective back sheets · CPC title

• C08L71/10 Primary

  from phenols · CPC title

• C08K5/0066

  Flame-proofing or flame-retarding additives · CPC title

• C08K5/105

  with phenols · CPC title

• C08K5/49

  Phosphorus-containing compounds {(C08K5/0091 takes precedence)} · CPC title