Novel stable water in oil dispersions of hydrosoluble cationic polymers based on salified or quaternized dimethylaminoethyl acrylate, process of preparation thereof and application thereof as flocculents
US4581402A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1983 |
| Grant date | Apr 8, 1986 |
| Priority date | — |
| Expiry date | Feb 3, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/455
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to stable water in oil dispersions, of hydrosoluble cationic polymers based on salified or quaternized dimethylaminoethyl acrylate copolymerized or not with acrylamide, and containing more than 5%(in moles) of cationic units uniformly and not statistically distributed along the chains, presenting a composition by weight of from 20 to 55% of polymers, from 20 to 45% of oil, from 1 to 5% of at least two emulsifying agents, and the balance to 100% being water, the oil phase being a mixture of normal C.sub.10 -C.sub.13 alkanes, one of the emulsifying agents having an HLB of 3 to 5, and good solubility in the oil phase, and a lipophilous group of a carbonated ramified chain of at least 16C and the other having an average HLB of 12 to 16, the percentages by weight of both agents being from 0.5 to 3% relative to the weight of the dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.