Use of hydroxyalkylated starches for improved emulsification of sizing agents
US6210475A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1999 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Sep 3, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/29
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention is directed to paper sizing emulsions, a method of making sizing emulsions, a method of sizing paper products, such as paper and board, and paper or board made using the method and the sizing emulsions of the invention. The paper sizing emulsions of the invention contains at least one sizing agent and a cationic liquid hydroxyalkylated starch that is pumpable and at least partially degraded. Typically, before dilution for mixing with the sizing material, the starch exists as a liquid in water and contains solids in an amount up to about 30 percent by weight, and has a viscosity of up to about 30,000 cps. The starch is diluted with water, before emulsifying the sizing agent to reduce the solids to an amount suitable for emulsification, and used to emulsify the sizing agent. The resulting emulsion can then be used to size paper and board.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.