C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/1000, 400/40
C08L 53/00 (2006.01) C08L 11/00 (2006.01) C09K 3/10 (2006.01)
Patent
CA 1208834
- 23 - ABSTRACT OF THE DISCLOSURE The invention provides a novel watertight rubbery sealing material of which the water-swellability is markedly insusceptible to the adverse influence of compression of the material in a dry condition. The watertight sealing material is a shaped and vulcanized body of a water-swellable rubber composition comprising, in a limited proportion, (a) a chloroprene rubber, (b) a highly water-absorptive resin such as a crosslinked polyacrlylic acid in the form of a sodium salt, (c) a rubbery polymer unvulcanizable with a metal oxide-based vulcanizing agent and (d) a metal oxide-based vulcanizing agent which is preferably a combination of magnesium oxide and zinc oxide.
446912
Harima Hiroshi
Kimura Toshihiro
Takasaki Kazuhiro
Yoshioka Yoshihiro
C.i. Kasei Co. Ltd.
Kirby Eades Gale Baker
Kuraray Isoprene Chemical Co. Ltd.
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