Water-absorbing rubber composition
US4420588A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1981 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | Dec 10, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2200/0645
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A water-absorbing rubber composition comprising (A) a 1,3-diene rubber with a crystal or glass region content as measured at an ordinary temperature of 5-50% and (B) a highly water-absorbing resin dispersed in the said rubber, the said highly water-absorbing resin being a product of crosslinking of a polymer which contains as monomer component thereof at least 40 mole percent of an .alpha.,.beta.-unsaturated compound containing 1 or 2 groups each selected from the class consisting of a carboxyl group and a group convertible to a carboxyl group with at least one crosslinking agent selected from the class consisting of a polyfunctional epoxy compound and a polyamine, the resin being in the form of a powder capable of passing through a 20-mesh Tyler screen and absorbing 20-500 times its own weight of distilled water. The composition can absorb water rapidly and produce a high swelling pressure, and has good durability in the swollen state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.