Glyoxalated inter-copolymers with high and adjustable charge density
US7589153B2 · kind B2 · utility
9Cited by
49References
36Claims
0Family size
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Key dates
| Filing date | May 25, 2005 |
| Grant date | Sep 15, 2009 |
| Priority date | — |
| Expiry date | Sep 1, 2026 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/47
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for making storage-stable glyoxalated inter-copolymers with higher and adjustable charge density suitable for use as a strengthening agent for paper. The glyoxalated inter-copolymers can be used to enhance the strength of paper, particularly recycled paper and mechanical printing paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.