Compositions and processes for paper production
US7914646B2 · kind B2 · utility
10Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2006 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Jul 21, 2026 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Oxidative compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The oxidative composition and method maintains and/or enhances brightness, prevents yellowing, and enhances the performance of paper products. Used in combination with optical brighteners and/or chelants the oxidative agents produce a synergistic effect not previously identified in the paper process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.