Cross-linked pullulan
US4152170A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 14, 1976 |
| Grant date | May 1, 1979 |
| Priority date | — |
| Expiry date | Jun 14, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B37/0018
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Cross-linked pullulans are obtained by the reaction of pullulan with a cross-linking agent selected from the group consisting of polycarboxylic acids, halogenated dicarboxylic acids, polycarboxylic anhydrides, aldehyde compounds, N-methylol compounds, isocyanate compounds, metaphosphoric acid salts, divinyl compounds, bis-aziridine and bifunctional compounds of the formula, EQU X--R--Z wherein X and Z are each a halogen atom or an epoxy group and R is an aliphatic residue having 1 to 30 carbon atoms, in a solvent, and are useful as gels or beds for chromatography or in various fields requiring high degrees of water absorbency and retention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.