Method for manufacture of paper, board or the like and use of the composition
US10787768B2 · kind B2 · utility
0Cited by
3References
20Claims
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Key dates
| Filing date | Sep 4, 2017 |
| Grant date | Sep 29, 2020 |
| Priority date | — |
| Expiry date | Oct 20, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for manufacture of paper, board or the like, comprising the step of dissolving a composition into aqueous solution, whereby an aqueous treatment solution is obtained for adding the obtained treatment solution to the pulp. The composition comprising a copolymer of acrylamide and at least one cationic monomer, the copolymer comprising cationic monomers at least 15 mol-%, calculated from total amount of monomers, and an ionic crosslinker agent comprising at least two carboxyl groups, wherein the equivalent ratio of carboxyl groups:cationic monomer is between 1:20 and 1:0.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.