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Process for producing thermoplastic elastomer composition

A thermoplastic elastomer and composition technology, applied in the field of thermoplastic elastomer composition production, can solve the problems of poor stability of metal halide feed, fluctuation of metal halide feed rate, metal halide segregation and the like

Inactive Publication Date: 2012-12-19
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the use of metal halides such as stannous chloride as a crosslinking aid and continuous feeding of metal halides to melt-kneading equipment such as extruders may lead to segregation of metal halides due to poor storage stability of metal halides , which may lead to large fluctuations in the metal halide feed rate due to poor stability of the metal halide feed, so conventional methods for producing thermoplastic elastomer compositions have not been satisfactory enough

Method used

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  • Process for producing thermoplastic elastomer composition

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Effect test

Embodiment

[0054] The present invention is described in more detail below by way of examples.

[0055] Raw materials and evaluation methods used in the following examples are as follows.

[0056] [raw materials to use]

[0057] Components (A), (E): by adding 100 parts by weight of ethylene-propylene-5-ethylene-2-norbornene copolymer rubber (Mooney viscosity (ML 1+4 Oil-extended rubber prepared by adding 100 parts by weight of paraffinic mineral oil to 100° C.) = 63, ethylene unit content = 66% by weight, and 5-ethylidene-2-norbornene unit content = 4% by weight

[0058] Component (B): polypropylene resin (polypropylene homopolymer, produced by Sumitomo Chemical Co., Ltd., trade name: NOBLEN D101, MFR (230° C., 21.18 N) = 0.7 g / 10min)

[0059] Component (C): Alkylphenol aldehyde condensate (manufactured by Taoka Chemical Co., Ltd., trade name: Tackirol 201)

[0060] Component (D): tin protochloride dihydrate (manufactured by Nihon Kagaku Sangyo Co., Ltd.)

[0061] Component (E): Par...

Embodiment 1

[0086] In the twin-screw extruder, continuously feed 62 parts by weight of oil-extended rubber, 24 parts by weight of polypropylene resin pellets (which are ground), 14 parts by weight of paraffin series mineral oil, 0.1 part by weight of phenols Antioxidant powder, 1.5 parts by weight of alkylphenol formaldehyde condensation product powder, and the mixture of polypropylene powder and stannous chloride dihydrate powder of 2.4 parts by weight (the polypropylene powder of 2.0 parts by weight, the dihydrate chloride of 0.4 parts by weight stannous powder), followed by dynamic heat treatment at 200±10° C. in order to obtain a thermoplastic elastomer composition. The feed stability of stannous chloride dihydrate is good.

Embodiment 2

[0088] In addition to using a mixture of 2.4 parts by weight of polyethylene powder and stannous chloride dihydrate powder (2.0 parts by weight of polyethylene powder; 0.4 parts by weight of stannous chloride dihydrate powder) instead of 2.4 parts by weight of polypropylene powder and dihydrate The mixture of stannous chloride hydrate powder implements each program step in the same manner as in Example 1. The feed stability of stannous chloride dihydrate is excellent.

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Abstract

The invention discloses a process for producing a thermoplastic elastomer composition. The method relates to a dynamic heat treatment of ethylene-alpha-olefin copolymer rubber (A) and polyolefin resin (B) in the presence of alkylphenol resin (C) and metal halide (D) in a melt kneading apparatus, wherein the metal halide (D) is powder, and a mixture of the powder of the metal halide (D) and a particulate material having a average particle diameter of 0.1 [mu] m to 3 mm is continuously fed into the melt kneading apparatus.

Description

technical field [0001] The present invention relates to a method for producing a thermoplastic elastomer composition. Background technique [0002] Olefin-based thermoplastic elastomer compositions have the same molding processability as olefin-based thermoplastic resins and are therefore used in a wide range of applications, such as for automobile parts, home electric appliance parts, medical device parts, electric wires, and the like. Such an olefinic thermoplastic elastomer composition is obtained by subjecting an olefinic rubber and a polyolefinic resin to dynamic heat treatment in the presence of a crosslinking agent. [0003] As the crosslinking agent, organic peroxides, sulfur, alkylphenol resins and the like have been used. In some cases, a cross-linking aid is used together with a cross-linking agent; as a cross-linking aid, compounds having two or more polymerizable double bonds such as N,N-phenylene bismaleimide and Trimethylolpropane trimethacrylate, metal hali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/16C08L23/00C08L23/12C08L61/06C08K13/02C08K3/16B29B9/06
CPCC08K13/02C08L23/10C08J3/20C08L23/12C08J3/201C08J2323/00C08L23/08C08L23/04C08L23/16B29B9/06C08L61/06C08K3/16C08L23/00C08L23/02C08K5/138
Inventor 小野修平夏山延博
Owner SUMITOMO CHEM CO LTD
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