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Rubber composition and rubber molded article using the same

A rubber composition and rubber molding technology, applied in the field of rubber moldings, can solve the problems of inability to cross-link, hinder EPDM cross-linking, and inability to obtain mechanical properties of rubber moldings, etc., and achieve the effect of excellent mechanical properties

Active Publication Date: 2016-12-07
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, especially in a system using EPDM as a rubber and a peroxide crosslinking agent as a crosslinking agent, when amorphous silica is compounded as a reinforcing agent, other new problems arise. Silica hinders the cross-linking of EPDM by the peroxide cross-linking agent, and the cross-linking cannot be done at all, or the cross-linking is insufficient, and as a result, rubber moldings with the required mechanical properties cannot be obtained.

Method used

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  • Rubber composition and rubber molded article using the same
  • Rubber composition and rubber molded article using the same
  • Rubber composition and rubber molded article using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] (Preparation of rubber composition)

[0104] Oil-extended EPDM (Esprene 670F manufactured by Sumitomo Chemical Co., Ltd., ethylene content: 66% by mass, diene content: 4.0% by mass, oil extension: 100 phr) was used as a rubber component.

[0105] In 200 parts by mass of this oil-extended EPDM (solid content (EPDM): 100 parts by mass), 3 parts by mass of dicumyl peroxide (Percumyl (registered) manufactured by NOF Corporation) as a peroxide crosslinking agent was blended. Trademark) D), 20 parts by mass of amorphous silica (Nipsil (registered trademark) VN3 manufactured by Tosoh Silicon Chemical Co., Ltd., wet-process silica), and 0.2 parts by mass of benzyltri A 50% aqueous solution of butylammonium chloride (BTMAC-50A manufactured by Lion Specialty Chemical Co., Ltd.) was kneaded using a 3L kneader and an open mill to prepare a rubber composition.

[0106] Regarding the compounding ratio of the active ingredient (benzyltributylammonium chloride) in the above aq...

Embodiment 2

[0108] As a quaternary ammonium salt, a 28% aqueous solution (Lipoquad T28 manufactured by Lion Specialty Chemical Co., Ltd.) of 1 part by mass of alkyl (C12-C16) trimethylammonium chloride was blended, and the same as in Example 1 In the same manner, a rubber composition was prepared.

[0109] Regarding the compounding ratio of the active ingredient (alkyl (C12-16) trimethylammonium chloride) in the above aqueous solution, the compounding ratio is 0.28 per 100 parts by mass of the solid content (EPDM) in the oil-extended EPDM The compounding ratio is 1.4 parts by mass per 100 parts by mass of amorphous silica.

Embodiment 3

[0111] As a quaternary ammonium salt, except that 0.5 parts by mass of powdered tetrabutylammonium bromide (TBAB-100A manufactured by Lion Specialty Chemical Co., Ltd.) was compounded, the rubber composition was prepared in the same manner as in Example 1. things.

[0112] Regarding the compounding ratio of the above-mentioned tetrabutylammonium bromide, the compounding ratio is 0.5 parts by mass per 100 parts by mass of solid matter (EPDM) in oil-extended EPDM, and the compounding ratio is 0.5 parts by mass per 100 parts by mass of amorphous dioxide Silicon, the compounding ratio is 2.5 parts by mass.

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PUM

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Abstract

To provide a novel rubber composition containing at least EPDM as a rubber component, manufactured by using a peroxide crosslinking agent as a crosslinking agent and blending at least amorphous silica as a reinforcer, capable of being colored with pale colors such as white or any colors other than black and capable of forming a rubber molded article excellent in mechanical property because above described crosslink of EPDM is not inhibited, and the rubber molded article formed by using the rubber composition. A rubber composition contains at least a rubber component containing EPDM, a peroxide crosslinking agent and amorphous silica and further quaternary ammonium salt of 0.3 pt.mass or more based on 100 pts.mass of the amorphous silica is blended. A rubber molded article 1 consists of the above described rubber composition.

Description

technical field [0001] The present invention relates to a rubber composition and rubber molded articles such as paper feed rollers using the rubber composition. Background technique [0002] Carbon black is generally used as a reinforcing agent for rubber, but as its name suggests, carbon black is black, so rubber molded products are basically black, and it is not suitable for manufacturing light-colored rubber molded products such as white or any color other than black . [0003] In rubber molded products, in particular, paper feed rollers installed in image forming devices using electrophotography such as laser printers, inkjet printers, or cash automatic teller machines (ATMs), etc., in order to prevent damage to the paper due to scratches pollution, there is a tendency to shun it as black. [0004] Therefore, in order to reduce the influence of the color of carbon black, it is considered to reduce the compounding ratio of the carbon black, but in this case, the reinfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K3/36C08K5/19C08K5/14C08K13/02C08K3/04C08K3/22
Inventor 滨洼真司
Owner SUMITOMO RUBBER IND LTD
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