Water-swellable rubber composition with a stable swelling properties at high temperatures

摘要

1. The water-swellable rubber composition comprising: (a) not swellable base rubber component, (b) a hydrophilic elastomer based on ethylene oxide with the crosslinkable curable functional group in an amount of from zero to 20 mol% inclusive, and (c) a swellable. non-elastomeric material in water, wherein the composition soderzhit100 phr base rubber component (a) 10-200 phr hydrophilic elastomer (b) based on ethylene oxide i50-200 phr swellable non-elastomeric material (s), wherein the elastomer (b) comprises at least 65 mol.% of ethylene oxide and 0.1 mol.% to 20 mol.%, inclusive crosslinkable curable functional group, and takzhedannaya composition soderzhit100 phr base rubber component (a), 30-300 phr hydrophilic elastomer (b) based on ethylene oxide phr swellable i20-200 water non-elastomeric material (s), wherein the elastomer (b) comprises from zero to less than 5 mol.% crosslinkable curable functional gruppy.2. Water-swellable rubber composition according to Claim. 1, wherein the primary rubber component is not swellable in water (a) is at least a component selected from the group consisting of a hydrogenated acrylonitrile-butadiene rubber (HNBR), epichlorohydrin rubber, acrylate rubber ( ACM), acrylonitrile-butadiene rubber (NBR), chloroprene, natural rubber, ethylene-propylene-diene rubber (EPDM) and natural kauchuka.3. Water-swellable rubber composition according to Claim. 1, wherein the curable functional group in the hydrophilic elastomer (b) based on ethylene is at least functional group selected from the group consisting of hydroxyl, carboxyl, epoxy, amino, oxime, vinyl oxazoline anhydride and amida.4. The swelling in water re