Crosslinked starch halohydrins and their nitrogen-containing substitution products
US4237271A · kind A · utility
4Cited by
15References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Apr 24, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B31/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Crosslinked starch is reacted with an epihalohydrin in the presence of a strong acid catalyst to produce the 3-halo-2-hydroxypropyl ether. Substitution of the halogen with nitrogen-containing compounds enables the preparation of novel water-insoluble cationic, anionic, and chelating starch ethers, as well as starch ethers having degrees of substitution heretofore unattainable in the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.