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Molded article of thermoplastic elastomer composition and process for producing the same

A technology of thermoplastic elastomer and manufacturing method, applied in the field of thermoplastic elastomer composition molded products, to achieve the effect of small compression set

Inactive Publication Date: 2006-05-24
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The problem to be solved by the present invention is to obtain thermoplastic elastomer composition molded articles having improved compression set and oil resistance compared with conventional thermoplastic elastomer composition molded articles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0165] The oil-extended ethylene-propylene-5-ethylene norbornene copolymer rubber (manufactured by JSR Corporation, product name "EP98A", as the ethylene / α-olefin copolymer (1)), has an ethylene content of 79 mol% and a propylene content of 21 mol %, iodide value 15, 75 phr of paraffin oil, 58 parts by mass, linear low-density polyethylene (LLDPE) as a crystalline polyethylene resin (2) (manufactured by Japan Polyethylene Co., Ltd., product name "ノバテツクLL UF423" , The degree of crystallinity is 40%, the melting point measured by DSC is 124°C) 21 parts by mass, the conjugated diene block copolymer (3) shown below 21 parts by mass, and the crystalline polymer as an α-olefin polymer Propylene (manufactured by Japan Polytechnic Co., Ltd., product name "ノバテツク PP BC5CW", crystallinity 70%) 5 parts by mass and tetraester type polymer sterically hindered phenolic antioxidant (manufactured by チバステイケミミカルズミカルズ company) as an anti-aging agentイルガノツクス1010") 0.2 parts by mass were mixed in a 10-l...

Embodiment 2

[0174] Except for adding 1 part by mass of trimethylolpropane trimethacrylate (manufactured by Kyoeisha Chemical Co., Ltd., product name "Rait Estel TMP") as a crosslinking aid, the same procedure as in Example 1 was performed.

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Abstract

According to the present invention, a molded article of a thermoplastic elastomer composition having excellent elasticity and very little compression set can be obtained. A thermoplastic elastomer composition molded article obtained by irradiating a molded article mainly composed of a thermoplastic elastomer composition with an electron beam, wherein the thermoplastic elastomer composition is a matrix composed of ethylene / α-olefin copolymer (1) Among them, a thermoplastic elastomer composition having a three-dimensional network structure formed from a crystalline polyethylene-based resin (2) and a conjugated diene-based block copolymer (3), and the present invention also relates to a molded article of a thermoplastic elastomer composition Production method in which ethylene / α-olefin-based copolymer (1), crystalline polyethylene-based resin (2) and conjugated diene-based block copolymer (3) are mixed and subjected to dynamic heat treatment to form a thermoplastic elastomer composition, molding the thermoplastic elastomer composition, and then subjecting it to electron beam irradiation.

Description

Technical field [0001] The present invention relates to a molded article of a thermoplastic elastomer composition obtained by subjecting a molded article containing a thermoplastic elastomer composition as a main component to electron radiation, and a method for producing the molded article. Background technique [0002] Dynamic crosslinking thermoplastic elastomers obtained from copolymers of ethylene and propylene and other α-olefins and olefin resins, in addition to flexibility and excellent rubber properties, do not require a vulcanization process, so they can be molded by conventional thermoplastic resins. -Injection molding, profile extrusion molding, calendering, blow molding, etc. to obtain molded products. Therefore, in recent years, from the viewpoints of so-called energy saving, resource saving, and recycling, the demand for substitute materials for vulcanized rubber and vinyl chloride resin in automobile parts, industrial products, electrical and electronic parts, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/00B29C35/08B29K9/00B29K105/04B29K105/24C08J9/04C08J9/12C08L23/00C08L23/04C08L23/08C08L23/16C08L53/00C08L53/02
CPCC08J7/123C08J9/12C08J2323/08C08J2353/00C08J2353/02C08L23/00C08L23/04C08L23/0815C08L53/02C08L2666/02C08J5/00C08J7/18C08L23/08
Inventor 鼎健太郎前田稔樋口元治神品顺二
Owner JSR CORPORATIOON