Water absorbing composite comprising inorganic powder encapsulated with a crosslinked carboxyl polymer
US4418163A · kind A · utility
40Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1982 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Aug 13, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A water absorbing composite comprises an inorganic powder, and a highly absorbent resin covering the whole surfaces of the individual particles of the inorganic powder. The resin is obtained by reacting with a basic substance a polymer containing as a monomeric constituent an .alpha.,.beta.-unsaturated compound having in its molecule one or two carboxyl groups, or one or two other groups convertible to a carboxyl group or groups, and by crosslinking the reaction product with a polyamine. The composite is useful as a water retaining agent for agriculture and horticulture, or as a dehydrating agent for oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.