Thermoplastic resin composition for wire-coating and heat resistant wire
AssigneeRiken Technos Corporation
InventorsKaoru Iwasa, Shinichi Kishimoto
Life of this patent
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Abstract
The invention provides a thermoplastic resin composition having (A) a thermoplastic polymer comprising (a1) 5 mass % to less than 50 mass % of a propylene polymer having a melting point of 150° C. or higher, (a2) 10 mass % to less than 60 mass % of an ethylene polymer, (a3) 5 mass % to less than 50 mass % of, for example, a hydrogenated product of a block copolymer of an aromatic vinyl compound and a conjugated diene compound, and (a4) 1 mass % to less than 30 mass % of, for example, an unsaturated carboxylic acid-modified olefin polymer; (B) a softener for nonaromatic rubbers; (C) a metal hydrate; (D) an organic peroxide; (E) an antioxidant; and (F) a coupling agent.
Claims10
A thermoplastic resin composition comprising, (A) a thermoplastic polymer, (B) a softener for nonaromatic rubbers, (C) a metal hydrate, (D) an organic peroxide, (E) an antioxidant, and (F) a coupling agent,
- wherein said component (A) comprises:
- (a1) 5 mass % to less than 50 mass % of a propylene polymer having a melting point of 150° C. or higher;
- (a2) 10 mass % to less than 60 mass % of an ethylene polymer;
- (a3) 5 mass % to less than 50 mass % of one or more selected from the group consisting of a block copolymer of an aromatic vinyl compound and a conjugated diene compound, a block copolymer of an aromatic vinyl compound and isobutylene, and a hydrogenated product of a block copolymer of an aromatic vinyl compound and a conjugated diene compound;
- and
- (a4) 1 mass % to less than 30 mass % of one or more selected from the group consisting of an unsaturated carboxylic acid-modified olefin polymer, an unsaturated carboxylic acid-modified aromatic vinyl compound elastomer, and an epoxy group-containing olefin polymer;
- and
- a total of said components (a1), (a2), (a3) and (a4) is 100 mass %,
- wherein said component (a2) comprises:
- (a2-1) a copolymer of ethylene and an α-olefin having 4 to 10 carbon atoms, having a density of 860 to 935 Kg/m3;
- and
- (a2-2) a polar ethylene copolymer,
- wherein said thermoplastic resin composition comprises:
- 70 to 95% by mass of said component (A);
- and
- 30 to 5% by mass of said component (B), with a total of said component (A) and said component (B) being 100 mass %, and based on the total of 100 parts by mass of said component (A) and said component (B),
- 30 to 150 parts by mass of said component (C);
- 0.01 to 1.0 part by mass of said component (D);
- more than 1 part by mass and 15 parts by mass or less of said component (E);
- and
- 0.1 to 8 parts by mass of said component (F), and
- wherein a volume change rate as gasoline resistance is 30% or less, wherein the volume change rate represents a volume change rate after a donut-shaped test specimen having an outer diameter of 22 mm and an inner diameter of 8 mm punched out from a 1 mm thick press sheet of the thermoplastic resin composition is immersed in gasoline at a temperature of 23° C. for 20 hour.
Dependencies are inferred from the claim text.