IP Library › Granted Patent US 6,838,503
Granted Patent B2
US 6,838,503 · App. 10/186,134 · Granted Jan 4, 2005

Flame-retardant composition and article

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 6,838,503
App. No.
10/186,134
Granted
Jan 4, 2005
Kind
B2
Abstract

A resin composition useful for wire and cable covering material is formed by compounding a phosphate ester retardant, boron phosphate, and zinc borate hydrate with a polyphenylene ether group resin or a combination of a polyphenylene ether group resin and an aromatic vinyl group resin, in a specific ratio.

Claims (19)

1. A thermoplastic composition, comprising:

100 parts by weight of a resin component comprising a polyphenylene ether group resin, or a polyphenylene ether group resin in combination with an aromatic vinyl group resin;

2 to 30 parts by weight of a phosphate ester flame retardant;

0.1 to 20 parts by weight of boron phosphate;

0.1 to 10 parts by weight of zinc borate hydrate; and

1 to 100 parts by weight of a thermoplastic elastomer selected from the group consisting of polyolefin group thermoplastic elastomer and polyester group thermoplastic elastomer.

2. The thermoplastic composition of claim 1 , wherein the polyphenylene ether group resin is a poly(2,6-dimethyl-1,4-phenylene ether) having an intrinsic viscosity of 0.08 to 0.60 measured at 30° C. in chloroform.

3. The thermoplastic composition of claim 1 , wherein the polyphenylene ether group resin is a copolymer comprising 2,3,6-trimethyl-1,4-phenylene ether units.

4. The thermoplastic composition of claim 1 , wherein the aromatic vinyl group resin is a homopolymer or copolymer of styrene, alpha-methyl styrene, alpha-methyl-p-methyl styrene, chlorostyrene, or bromostyrene.

5. The thermoplastic composition of claim 1 , wherein the aromatic vinyl group resin in a high-impact polystyrene comprising 70 to 99% by weight polystyrene and 1 to 30% by weight of a diene rubber.

6. The thermoplastic composition of claim 1 , wherein the resin component, comprises 1 to 99 parts by weight of the polyphenylene ether group resin and 99 to 1 parts by weight of the aromatic vinyl group resin.

7. The thermoplastic composition of claim 1 , wherein the phosphate ester flame retardant is an aromatic phosphate ester.

8. A thermoplastic composition, comprising:

100 parts by weight of a resin component comprising 20 to 80 parts by weight a polyphenylene ether group resin and 80 to 20 parts by weight of an aromatic vinyl group resin;

5 to 25 parts by weight of an aromatic phosphate ester flame retardant;

0.5 to 10 parts by weight of boron phosphate;

0.5 to 10 parts by weight of zinc borate hydrate; and

1 to 100 parts by weight of a thermoplastic elastomer selected from the group consisting of polyolefin group thermoplastic elastomer and polyester group thermoplastic elastomer.

9. An article comprising the composition of claim 8 .