Urea composition having reduced compressibility, cake formation and dust formation, and process for its preparation
US7824565B2 · kind B2 · utility
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2References
14Claims
0Family size
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Key dates
| Filing date | Jan 16, 2006 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Feb 8, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05G5/40
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Colorfast urea composition having reduced compressibility, cake formation and tendency of re-crystallization of the urea granulate, wherein the granulate further contains at least two different biodegradable polymers, of which at least one polymer is preferably a polyalkenyl amine compound. The other polymer is preferably polyaspartic acid or polyvinyl alcohol. The invention further relates to a process for the preparation of such a urea composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.