Resin composition for wire and cable coverings

• US 7,005,465 B2
• Filed: 08/01/2003
• Issued: 02/28/2006
• Est. Priority Date: 08/07/2002
• Status: Expired due to Term

• Current Assignee: SHPP Global Technologies BV
• Original Assignee: General Electric Company
• Inventors: Sato, Sho
• Primary Examiner(s): Lipman, Bernard
• Application Number:
  US10/632,606
• Publication Number:
  US 20040030012A1
• Time in Patent Office: 942 Days
• Field of Search: 524/140, 524/141, 524/143, 524/502, 524/504, 524/526
• US Class Current: 524/140
• CPC Class Codes: C08K 5/523 with hydroxyaryl compounds
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 2205/035 containing four or more polymers in a blend
• CPC Class Codes: C08L 25/06 Polystyrene
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 53/02 of vinyl-aromatic monomers and conjugated dienes
• CPC Class Codes: C08L 71/12 Polyphenylene oxides
• CPC Class Codes: C08L 71/123 not modified by chemical after-treatment

Abstract

The present invention offers a resin composition for user as a covering material for wires and cables that excels in fire retardancy with non-halogen, chemical resistance and melting properties, and also excels in workability, heat resistance, impact resistance and flexibility. A resin composition for wires and cables covering material is obtained by blending polyphenylene ether resin with syndiotactic polystyrene polymer, atactic polystyrene resin and non-halogen fire retardant or blending polyphenylene ether resin with syndiotactic polystyrene polymer, atactic polystyrene resin, non-halogen fire retardant and thermoplastic elastomer in fixed ratios.

Claims

1. A resin composition consisting essentially of:

(A) 10 to 70 parts by weight polyphenylene ether, (B) 15 to 75 parts by weight syndiotactic polystyrene polymer, (C) 10 to 40 parts by weight stactic polystyrene resin, (D) 5 to 40 parts by weight non-halogen fire retardant wherein the sum of components (A)+(B)+(C)+(D)=100 parts by weight, and (E) hydrogenated styrene block copolymer in an amount of 10 to 200 parts by weight with respect to 100 parts by weight of resin composition wherein the hydrogenated block copolymer has a molecular weight distribution below 10 and the composition has a tensile strength greater than or equal to 34 and a tensile elongation greater than 5 when determined according to ASTM D638.

2. The resin composition of claim 1, wherein the polyphenylene ether component is poly(2,6-dimethyl-1,4-phenylene)ether having intrinsic viscosity in the range of 0.08 to 0.60 dl/g when measured in chloroform at 30°

C.

3. The resin composition of claim 1, wherein the non-halogen fire retardant is an aromatic phosphoric ester.

4. The resin composition of claim 1, wherein the hydrogenated styrene-block copolymer is a block copolymer of styrene and butadiene or styrene and isoprene.

5. A wire covering made from the resin composition of claim 1.

6. A cable covering made from the resin composition of claim 1.