Styrene/acrylic type polymers for use as surface sizing agents
US5122568A · kind A · utility
29Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1991 |
| Grant date | Jun 16, 1992 |
| Priority date | — |
| Expiry date | Feb 6, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/37
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process is disclosed for the preparation of styrene/acrylic type polymers which are useful in the sizing of paper. The process comprises polymerizing the monomers in an alcohol/water mixture at reflux temperature in the presence of a free-radical generating catalyst. The catalyst is added portion-wise over the course of the reaction and the resultant polymer is neutralized while substantially simultaneously separating the alcohol/water mixture and adding water to recover a product of less than 25% polymer solids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.