ASA sizing emulsions containing low and high molecular weight cationic polymers
US5962555A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1997 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Jun 25, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/56
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
ASA sizing emulsions containing low and high molecular weight cationic polymers are described. An ASA sizing emulsion of the invention contains 25 to 99 percent by weight water, 0.003 to 60 percent by weight ASA, 0.003 to 50 percent by weight of a cationic polymer mixture, and 0 to 2 percent by weight of a surfactant. The cationic polymer mixture contains 75 to 99 percent by weight of an ionene polymer and 1 to 25 percent by weight of a high molecular weight polyethyleneimine polymer. In the sizing emulsion, the ASA has a particle size ranging from 0.5 to 3 microns. A method for sizing paper using such an emulsion is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.