Compositions and processes for paper
US8617356B2 · kind B2 · utility
0Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2012 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Apr 30, 2032 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/1042
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Compositions and processes that enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process involving optical brighteners are identified. Used in combination with optical brighteners and/or chelants the described agents produce a synergistic effect not previously identified in the paper process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.