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Production method of thermoplastic elastomer composition

A thermoplastic elastomer and composition technology, applied in the field of preparation of olefin-based thermoplastic elastomer composition, can solve the problems of poor appearance of extruded products, unsuitable olefin resin and rubber form, etc.

Inactive Publication Date: 2008-01-09
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, although thermoplastic elastomers obtained by conventional techniques have satisfactory physical properties such as tensile strength and compression set, they suffer from the disadvantage of poor appearance of extruded products (see JP-A-4-63851 and Japanese patent 3303005)
The reason for this disadvantage is that if the resin crosslinking agent and activator are added together at the same time, and then dynamic crosslinking is performed, the crosslinking reaction proceeds at a very fast rate, whereby the morphology of the olefin resin and rubber becomes unfavorable

Method used

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  • Production method of thermoplastic elastomer composition
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preparation example Construction

[0031] The content of each component used in the production method according to the present invention is preferably as follows. The content of component (A) is preferably 40 to 95 parts by weight and the content of component (B) is preferably 5 to 60 parts by weight (while the total of components (A) and (B) is 100 parts by weight). Based on a total of 100 parts by weight of component (A) and component (B), the content of component (C) is preferably 0.1 to 20 parts by weight, the content of component (D) is preferably 0.001 to 0.1 part by weight and the composition The content of the component (E) is preferably 0.1 to 20 parts by weight. When an oil-plasticized rubber is used, the content of component (A) includes extender oil. In addition, when two or more types of components are used together, the contents of the respective components refer to the total content.

[0032] In the present invention, other components may be used according to various purposes within the range o...

Embodiment 1 to 6 and comparative example 1 to 3

[0061] Embodiments are now described in more detail. The added amounts of materials are listed on the basis of setting the total weight of component (A) and component (B) as 100 parts by weight (see Table 1).

[0062] At rotation speed of 280rpm, barrel temperature of C1 to C2: 30°C, C3 to C4: 150°C, C5 to C11: 185°C, C12: 200°C, head temperature of 200°C and extrusion rate of 50kg / hour Using a twin-screw extruder TEX44HCT (produced by The Japan Steel Works Ltd., L / D=42) under the basic conditions of Fix at the barrel 2 position, and add the halogen scavenger (component (E)) from the barrel 9 position.

[0063] In Example 1, 0.005 parts by weight of zinc oxide (component (D)) was added from the barrel 2 position, and 0.3 parts by weight of zinc oxide (component (E)) was added from the barrel 9 position. Example 2 was carried out in the same manner as in Example 1, except that the amount of zinc oxide (component (D)) added from the cylinder 2 position was 0.01 parts by weight...

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Abstract

It is an object of the present invention to provide a method for producing an olefin thermoplastic elastomer composition which, through dynamic crosslinking of an olefin resin and an ethylene-alpha-olefin copolymer rubber as polymer components, has excellent appearance of the extrusion molding while also having excellent physical properties such as compression set, oil resistance and tensile strength. The present invention is directed to a method for producing a thermoplastic elastomer composition having the steps of: dynamically heat treating the following components (A) to (D); adding a component (E) to a resulting composition; and kneading a resulting mixture, (A): an ethylene-alpha-olefin-based copolymer rubber; (B): a polyolefin resin; (C): a halogenated alkylphenolic resin-based crosslinking agent; (D): zinc oxide; and (E): a halogen capturing agent.

Description

technical field [0001] The present invention relates to a method for preparing an olefin-based thermoplastic elastomer composition. More specifically, the present invention relates to a method for producing an olefin-based thermoplastic elastomer composition comprising an olefin-based resin and an ethylene-α-olefin-based copolymer rubber as polymer components , the composition obtained by dynamic heat treatment has excellent appearance of extruded products, and also has excellent physical properties such as tensile strength and compression set. Background technique [0002] It is known to use an alkylphenol resin as a crosslinking agent together with tin chloride as an activator when a thermoplastic elastomer is obtained by dynamic heat treatment of olefin resin and rubber. These thermoplastic elastomers are attracting attention due to their in-line steps and recyclability, since they do not require a vulcanization step and have the same molding processability as thermoplas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L23/00C08K3/36C08L61/06C08K3/22C08K3/26
CPCC08L23/10C08L2312/04C08L23/16C08L71/12C08L2666/02
Inventor 池谷孝一重松广信夏山延博
Owner SUMITOMO CHEM CO LTD