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Thermoplastic elastomer composition, a method for producing a molded body, and a molded body

A technology of thermoplastic elasticity and composition, applied in the direction of coating, etc., can solve problems such as uneven color and unsatisfactory appearance

Active Publication Date: 2015-04-29
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the injection-molded article formed from the above-mentioned polyolefin-based thermoplastic elastic composition may have uneven color at the torn part, and the appearance cannot be fully satisfied.

Method used

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  • Thermoplastic elastomer composition, a method for producing a molded body, and a molded body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0211] [Thermoplastic elastic composition]

[0212] Cooperate the erucamide of the propylene-based resin A-1 of 100 parts by weight, the ethylene-alpha-olefin copolymer rubber C-1 of 150 parts by weight, 0.05 parts by weight (Nippon Seika trade name NEUTRON S), 0.15 parts by weight of Oxidizing agent (0.1 parts by weight of Sumitomo Chemical Co., Ltd., trade name Sumilizer GA80 and 0.05 parts by weight of Ciba Specialty Chemicals Co., Ltd., trade name IRGAFOS168.) and 1.0 parts by weight of black pigment (Sumilizer Pigment Co., Ltd. The product name is SPEC824), and it was melt-kneaded using a Banbury mixer to obtain a thermoplastic elastic composition. Table 1 shows the measurement results of physical properties of this thermoplastic elastic composition.

[0213] [Injection molded article for physical property evaluation]

[0214] The thermoplastic elastic composition was molded into a flat plate with a size of 90 mm in length, 150 mm in width, and 2 mm in thickness using a...

Embodiment 2

[0216] As a propylene resin, it carried out similarly to Example 1 except having used 100 weight part of A-1, and 28 weight part of B-1. Table 1 shows the evaluation results.

Embodiment 3

[0218] As a propylene-type resin, it carried out similarly to Example 1 except having used 100 weight part of A-1, and 28 weight part of B-2. Table 1 shows the evaluation results.

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Abstract

The invention provides a thermoplastic elastomer composition, a method for producing a molded body, and a molded body. The thermoplastic elastomer is provided that includes a propylene-based resin and an ethylene-alpha-olefin copolymer rubber, and has a crystallization time at 130 DEG C measured by differential scanning calorimeter (DSC) of from 250 to 1,000 sec. There are also provided a method for producing a molded body, the method including a step of preparing the thermoplastic elastomer composition and a step of injection molding the thermoplastic elastomer composition, and a molded body produced by the method.

Description

technical field [0001] The present invention relates to a thermoplastic elastic composition, a method for producing a molded article, and a molded article. Background technique [0002] The airbag cover of the airbag system for automobiles needs to have rigidity suitable for various uses such as driver's seat and passenger's seat, and high elongation at break so that the airbag cover can be stretched on the tear line (to make the airbag deploy). The parts other than the thin-walled part of the airbag cover provided due to the cracking of the airbag cover) do not crack; have high low-temperature impact strength so as to be able to withstand use in cold places; and have an appearance commensurate with the interior parts of the car. [0003] As such airbag covers, many injection-molded articles made of polyolefin-based thermoplastic elastic compositions containing propylene-based resins and ethylene-propylene-non-conjugated diene copolymer rubbers have been proposed. For examp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/10C08L23/08B29C45/00
Inventor 大谷幸介伊地知靖人
Owner SUMITOMO CHEM CO LTD