US 11,634,570 B2 · Thermoplastic elastomer composition

Abstract

A thermoplastic elastomer composition that can form a molded article having both high low-temperature impact resistance and high high-temperature impact resistance is provided. A specimen of the thermoplastic elastomer composition 30 mm wide×30 mm long×2.0 mm thick punched out from a central portion of a molded article formed by injection-molding the thermoplastic elastomer composition into a mold cavity 90 mm wide×150 mm long×2.0 mm thick at a cylinder temperature of 220° C., a mold temperature of 50° C., and an injection rate of 25 cm3/sec satisfies the following requirements: (1) an area increase rate S of the specimen after impregnation with petroleum benzine at 23° C. for 24 hours is 20% or less; and (2): a volume increase rate V of the specimen after impregnation with petroleum benzine at 23° C. for 24 hours is 20% or more and 125% or less.

Claims11

Dependent claims

A thermoplastic elastomer composition, wherein a specimen having a size of 30 mm wide×30 mm long×2.0 mm thick punched out from a central portion of a molded article formed by injection-molding the thermoplastic elastomer composition into a mold cavity, 90 mm wide×150 mm long×2.0 mm thick, under conditions of a cylinder temperature of 220° C., a mold temperature of 50° C., and an injection rate of 25 cm3/sec satisfies the following requirements (1) and (2),

Requirement (1):
an area increase rate S of the specimen after impregnation with petroleum benzine at 23° C. for 24 hours is 20% or less;
and
Requirement (2):
a volume increase rate V of the specimen after impregnation with petroleum benzine at 23° C. for 24 hours is 20% or more and 125% or less.

2 more elements

Dependencies are inferred from the claim text.

Thermoplastic elastomer composition

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Thermoplastic elastomer composition

Life of this patent

Abstract

Claims11