Compositions for coating feedstuff additives for ruminants and feedstuff additives thus coated
US4877621A · kind A · utility
17Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1987 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | Sep 2, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5015
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A composition for coating a biologically active substance, which is stable in a medium with a pH greater than or equal to 5 and which enables the active substance to be released in a medium with a pH less than or equal to 3.5, consisting of a basic amino copolymer (preferably vinyl-pyridine/styrene copolymer) and a hydrophobic substance with a melting point greater than 60.degree. C. (preferably stearic acid), the hydrophobic substance content being between 50 and 90% of the total mass of the coating, and granules comprising a nucleous containing the biologically active substance, coated with this composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.