Paper sizing composition
US7585391B2 · kind B2 · utility
2Cited by
16References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2003 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Jun 12, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1303
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to the sizing of paper and board using alkenyl succinic anhydride (ASA). The invention provides a sizing composition which comprises an aqueous emulsion of an ASA wherein the ASA incorporates a maximum of 1% by weight (preferably a maximum of 0.5% by weight) of polymeric residues. The composition may incorporate less than 0.5% by weight of olefins. Paper sizing compositions in accordance with the invention provide enhanced resistance to penetration of the edges of paper and board by agents such as hot hydrogen peroxide and lactic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.