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Process for producing thermoplastic elastomer, and thermoplastic elastomer

A thermoplastic elastomer and a manufacturing method technology, applied in the field of thermoplastic elastomers, can solve the problems of not revealing triblock copolymers and the like, and achieve the effects of simple equipment and low price

Active Publication Date: 2018-01-19
KANEKA CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it does not disclose a scheme for further polymerizing aromatic vinyl monomers to the copolymer to produce a triblock copolymer

Method used

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  • Process for producing thermoplastic elastomer, and thermoplastic elastomer
  • Process for producing thermoplastic elastomer, and thermoplastic elastomer
  • Process for producing thermoplastic elastomer, and thermoplastic elastomer

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0225] (Manufacturing example 1) Preparation of sheet for evaluation

[0226] With respect to 100 parts by weight of the obtained thermoplastic elastomer, 5 parts by weight of DHT-4V (registered trademark, manufactured by Kyowa Chemical Industry Co., Ltd.) was added as a stabilizing auxiliary agent, and 0.5 parts by weight of ADK STAB AO-50 (manufactured by ADEKA Corporation) was added as an antioxidant. Parts by weight were kneaded at 170° C. and 50 rpm for 3 minutes, then degassed under reduced pressure for 1 minute, and pressed with a press preheated at 170° C. to obtain a sheet with a thickness of 2 mm.

manufacture example 2

[0227] (Manufacture example 2) Preparation of adhesive layer (halogenated thermoplastic elastomer)

[0228] 15 g of the halogenated thermoplastic elastomer was clamped with release paper, and pressed at 170° C. for 8 minutes to obtain a sheet-like sample with a thickness of 0.5 mm.

manufacture example 3

[0229] (Manufacturing example 3) Preparation of support layer

[0230] 40 g of pellets of SIBSTAR (registered trademark) 102T (manufactured by Kaneka Co., Ltd.) were pressed at 200° C. for 8 minutes to obtain a sheet-like sample piece with a thickness of 2 mm. Next, the nylon mesh was placed on the sample sheet, and pressed again at 200° C. for 8 minutes to obtain a support layer sample formed by crimping the nylon mesh and SIBSTAR 102T.

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Abstract

When producing a copolymer of a block (a) comprising an alkylstyrene and an isoolefin as main components and a block (b) comprising an aromatic vinyl monomer as a main component, it has been impossible in conventional techniques to inexpensively and stably produce, with simple equipment, a thermoplastic elastomer in which units of the alkylstyrene have been randomly introduced into the isoolefin polymer and which can retain excellent mechanical strength. The above-mentioned problem is solved by using a specific compound as a polymerization initiator and keeping the amount of the unreacted alkylstyrene present during the polymerization for producing the block (a) at up to 1 / 90 the total amount of the isoolefinic monomers.

Description

technical field [0001] The present invention relates to a method for producing a thermoplastic elastomer comprising a polymer block mainly composed of alkylstyrene and isoolefin-based monomers, and a polymer block mainly composed of aromatic vinyl monomers, and thermoplastic elastomers. body. Background technique [0002] Polymers mainly composed of isoolefin-based monomers represented by isobutylene are widely used in various seals because of their high gas barrier properties. Known are, for example, styrene-b-isobutylene-b-styrene block copolymers (SIBS), isobutylene / isoprene polymers, isobutylene / isoprene polymers halogenated with chlorine or bromine , and isobutylene / p-methylstyrene polymers halogenated with chlorine or bromine. [0003] SIBS is composed of a low Tg block and a high Tg block. The low Tg block is composed of isobutylene polymer as the middle block, and the high Tg block is composed of styrene polymer as both end blocks. Due to this structure, SIBS exhi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F297/00
CPCC08F8/22C08F8/14C08F2810/30C08F2810/50C08F297/06C08F297/00C08F6/00C08F297/08
Inventor 加藤泰央井狩芳弘
Owner KANEKA CORP
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