Process for preparing readily dispersible water-soluble cellulosic polymers
US5674999A · kind A · utility
2Cited by
2References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 18, 1995 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Dec 18, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B15/005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved process for surface treating water soluble cellulosic polymers with crosslinking agents to provide products which are more readily dispersible in cold water, and have longer viscosity delay times than can be achieved with polymers treated in low intensity mixers, such as ribbon blenders, comprising distributing the crosslinking agent using a continuous, high intensity mixer, followed by heating to facilitate surface crosslinking. This process also allows for a reduced level of crosslinking chemicals to be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.