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Title:
FLUORINE RUBBER COMPOSITION AND CROSSLINKED FLUORINE RUBBER PRODUCT
Document Type and Number:
WIPO Patent Application WO/2019/163928
Kind Code:
A1
Abstract:
Provided are: a fluorine rubber composition which is capable of improving the crack growth resistance at high temperatures; and a crosslinked fluorine rubber product which is obtained by crosslinking this fluorine rubber composition. A fluorine rubber composition which contains, per 100 parts by mass of a peroxide-crosslinkable fluorine rubber (A), 10-60 parts by mass of a carbon black (B) and 0.1-10 parts by mass of a peroxide-based crosslinking agent (C), and wherein the carbon black (B) has a number of foreign substances of 30 pieces/mm2 or less as measured under the measurement conditions described below. Measurement conditions: A dispersion liquid in which the carbon black (B) is dispersed in ethanol and contains the carbon black (B) at 0.1% by mass is collected in an amount of 1 ml; the collected dispersion liquid is subjected to filtration under reduced pressure; and the residue of the carbon black (B) trapped on the filter surface is observed with a scanning electron microscope so as to measure the number of foreign substances that have an aspect ratio of 1.1 or less and a Heywood diameter of 5 μm or more.

Inventors:
ARAI, Masashi (Umeda Center Building, 4-12, Nakazaki-Nishi 2-Chome, Kita-ku, Osaka-sh, Osaka 23, 〒5308323, JP)
OHTA, Daisuke (Umeda Center Building, 4-12, Nakazaki-Nishi 2-Chome, Kita-ku, Osaka-sh, Osaka 23, 〒5308323, JP)
UEDA, Akinori (Umeda Center Building, 4-12, Nakazaki-Nishi 2-Chome, Kita-ku, Osaka-sh, Osaka 23, 〒5308323, JP)
ODA, Yasuhiro (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
ORIDE, Junichi (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
Application Number:
JP2019/006692
Publication Date:
August 29, 2019
Filing Date:
February 22, 2019
Export Citation:
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Assignee:
DAIKIN INDUSTRIES, LTD. (Umeda Center Building, 4-12 Nakazaki-Nishi 2-Chome, Kita-ku, Osaka-sh, Osaka 23, 〒5308323, JP)
BRIDGESTONE CORPORATION (1-1 Kyobashi 3-chome, Chuo-ku Tokyo, 40, 〒1048340, JP)
International Classes:
C08L27/12; B29C33/40; C08K3/04; C08K5/14
Attorney, Agent or Firm:
TASS MEISTER PATENT FIRM (Noble Court Hirakawa-cho 506, 4-13 Hirakawa-cho 2-chome, Chiyoda-k, Tokyo 93, 〒1020093, JP)
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