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Rubber composition and vulcanized molded article

A rubber composition, vulcanization molding technology, applied in other chemical processes, chemical instruments and methods, mechanical equipment, etc., can solve the problems of electrical insulation and kneading processability that are not mentioned, and achieve excellent kneading processability, Effects of good compression set properties, excellent low temperature properties and electrical insulating properties

Pending Publication Date: 2022-07-22
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent Documents 1 and 2 teach, for example, that excellent low-temperature sealing properties can be imparted to rubber molded articles (sealing members) by using a rubber composition containing EBENB and carbon black, but do not mention electrical insulation and kneading processability.

Method used

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  • Rubber composition and vulcanized molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] 100 parts by weight of EBDM (iodine value: 16 (g / 100), trade name "EBT K-9330M", manufactured by Mitsui Chemicals Co., Ltd.), silica A (trade name "Nipsil E74P") were mixed with an open roll kneader. , manufactured by Tosoh Silica Co., Ltd.) 30 parts by weight, a silane coupling agent (trade name "A171", manufactured by Momentive Corporation) 1 weight part, a crosslinking agent (trade name "ParkMill D", manufactured by NOF Corporation) 3 Parts by weight and 1 part by weight of a lubricant (trade name "Diamid 0-200T", manufactured by Nippon Kasei Corporation) were kneaded to prepare a rubber composition.

[0064]

[0065] With respect to the obtained rubber composition, the kneading processability was evaluated based on the adhesion to the surface of the kneader. If kneading was stably possible, it was rated as "○", and if the rubber composition adhered to the surface of the kneader so much that kneading could not be continued, it was rated as "x". The results are sho...

Embodiment 2

[0073] A rubber composition and a vulcanized molded product thereof were prepared in the same manner as in Example 1, except that the blending amount of silica A was 60 parts by weight, and the aforementioned measurements and evaluations were performed. The results are shown in Table 1.

Embodiment 3

[0075] A rubber composition and its vulcanizate molded article were prepared in the same manner as in Example 1, except that the blending amount of silica A was 90 parts by weight, and the above-mentioned measurements and evaluations were performed. The results are shown in Table 1.

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Abstract

The present invention relates to a rubber composition containing an ethylene-butylene-diene terpolymer, silica having a CTAB specific surface area of 30 m2 / g or more and 150 m2 / g or less, a silane coupling agent and a cross-linking agent, the content of the silica being 25 parts by weight or more and 90 parts by weight or less per 100 parts by weight of the ethylene-butylene-diene terpolymer.

Description

technical field [0001] The present invention relates to a rubber composition and a vulcanized molded article using the rubber composition. Background technique [0002] In the past, rubber materials such as nitrile rubber (NBR), fluororubber (FKM), and acrylic rubber (ACM) have been widely used as various rubber molded products (such as sealing parts, electrical insulators, vibration-proof rubber, sound-insulating rubber) due to their properties. , general industrial rubber, etc.) materials. However, these materials have a problem that sufficient rubber properties cannot be exhibited in a low temperature environment (for example, -40° C. or lower), and the use of rubber materials excellent in cold resistance is eagerly desired. [0003] As such a rubber material, an ethylene-propylene-diene terpolymer (hereinafter also referred to as "EPDM") is widely known. The cold resistance of EPDM is superior to the above-mentioned rubber materials, and sufficient rubber properties ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08J3/24C08K5/54C09K3/10F16J15/10C08K3/36
CPCC08K3/36C09K3/1006C09K2200/0642C08L23/083F16J15/102F16J15/064C08K5/14C08K5/5425C08K2201/006C08F210/18C08K5/0025
Inventor 铃木昭宽野口真小林广迪
Owner NOK CORP
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