Polycationic polymer salts, their production and use
US6426382B1 · kind B1 · utility
23Cited by
2References
9Claims
0Family size
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Key dates
| Filing date | Dec 21, 2000 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Dec 21, 2020 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Aqueous solutions of polycationic polymers (PAB) containing quaternary ammonium groups in salt form as heteroatomic chain members or ring members of the polymer, wherein a part of the counter-ions to the quaternary cationic groups are anionic groups of anionic optical brighteners, containing at least one anionic group, are valuable multi-functional agents in papermaking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.