Modified of improving dry strength and/or drainage of a paper or paperboard
US9879380B2 · kind B2 · utility
5Cited by
2References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 2, 2017 |
| Grant date | Jan 30, 2018 |
| Priority date | — |
| Expiry date | Mar 2, 2037 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of improving dry strength and/or drainage of a paper or paperboard by adding to a paper or paperboard furnish, a graft copolymer composition of a vinyl monomer and a functionalized vinylamine-containing base polymer graft copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.