Chitosan derivatives useful in compositions for coating feedstuff additives intended for ruminants
US5077052A · kind A · utility
10Cited by
1References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1989 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Nov 29, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q19/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Novel organosoluble derivatives of chitosan, useful in coating biologically active feedstuff additives intended for ruminants, to provide coatings which are stable at a pH greater than 5 and which release the biologically active substance at a pH below 3.5, consist of a random chain of units represented by the formulae: ##STR1## in which: R.sub.1 represents an alkylcarbonyl radical (2 to 4 carbon atoms), R.sub.2 represents an alkyl radical (2 to 21 carbon atoms) or an optionally substituted phenyl radical, and R.sub.3 and R.sub.4 represent a hydrogen atom or alkylcarbonyl radicals (2 to 4 carbon atoms).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.