Tokai Rubber Industries, Ltd.

Hidehito Osada

Shinobu Kanbe

A laminar structure consisting of at least a first layer (2) formed of a fluoro rubber or a fluoro resin, and a second layer (4) laminated in contact with the first layer and formed of an epichlorohydrin rubber, wherein the improvement comprises; the second layer (4) being formed of a rubber composition which contains 100 parts by weight of an epichlorohydrin rubber material as a base rubber component, 0.1-5 parts by weight of a vulcanizing agent formed of a 2,3-dimercaptoquinoxaline derivative represented by the formula (1), 0.1-5 parts by weight of a salt of 1,8-diazabicyclo(5,4,0)undecene-7 represented by the formula (2), and 1-20 parts by weight of at least one hydrotalcite compound represented by the formula (3), wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent a same one or respective different ones of a hydrogen atom and an alkyl group having 1-4 carbon atoms, X.sup.- represents an acid radical of carboxylic acid or phenolic resin, M.sub.1.sup.2+ represents at least one divalent metal selected from the group consisting of Mg, Ca, Sr and Ba, M.sub.2.sup.2+ represents at least one divalent metal selected from the group consisting of Zn, Cd, Pb and Sn, M.sup.3+ represents a trivalent metal, A.sup.n- represents an n-valent anion, a and b respectively represent a real number from 0 to 10, x represents a+b and a real number from 1 to 4, y represents an integer from 1 to 5, and w represents a real number. ##STR1##

Growing community of inventors

Kasugai, Japan

Hidehito Osada