Compression-resistant water-swellable rubber composition and watertight sealing material comprising the same
US4532298A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 6, 1984 |
| Grant date | Jul 30, 1985 |
| Priority date | — |
| Expiry date | Feb 6, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2200/0642
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.