Composition and process for sizing paper
US5647898A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1996 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | May 9, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/52
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a new composition for sizing paper and board, containing a cationic polysaccharide esterified by a dicarboxylic acid anhydride, characterized in that the said dicarboxylic acid anhydride is substituted with a carbon chain, saturated or unsaturated, of branched structure. The anhydride may for example consist of tetrapropenylsuccinic anhydride or of any one of its isomers. The composition for sizing according to the invention may, if necessary, contain an oxidizing agent such as a persulphate. It may advantageously be applied to the surface treatment of printing and/or writing papers, in particular of papers for envelopes and of papers for impact-free printing such as inkjet printing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.