Cationic monomer delayed addition process
US5081182A · kind A · utility
11Cited by
9References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1990 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Mar 5, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/455
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Water-in-oil emulsions of cationic water-soluble copolymers which are prepared by incorporating only a portion of the cationic monomer in the aqueous phase prior to forming the water-in-oil emulsion in which polymerization will occur, forming the emulsion, adding the balance of the cationic monomer such that essentially no polymerization occurs immediately after the addition, and polymerizing the monomers. Copolymers prepared by this process show improved performance over conventionally prepared cationic copolymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.