Three-dimensional polymeric gel materials containing phosphoric acid residues capable of dissociation and a method for their preparation
US4031037A · kind A · utility
9Cited by
5References
13Claims
0Family size
Inventors
Key dates
| Filing date | Feb 20, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Feb 20, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/40
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Organic three-dimensional polymeric gel-like materials containing covalently bonded phosphoric acid or a derivative thereof and a method for their manufacture. The bonding is accomplished by the reaction of the free hydroxy or epoxide groups in the homogeneous or macroporous gel-like matrix with the H.sub.3 PO.sub.4, P.sub.2 O.sub.5, phosphorus pentahalide and oxyhalide. The halide containing groups may then be hydrolyzed to form acid groups which then may be modified to form complex compounds by reaction with Lewis acids. The gel material may serve as a strongly acidic cation exchanger, catalyst or polymer reagent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.