Process for sizing paper with anionic hydrophobic sizing agents and cationic retention aids
US5201998A · kind A · utility
17Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1990 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | Feb 28, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H17/03
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Sizing agents of which some are novel and which have at least one anionic or acidic group which is optionally in the form of a salt and at least two hydrophobic substituents which each have at least 5 carbon atoms, at least two of the most adjacent hydrophobic substituents being bonded to each other with a linking member which has at least 2 hetero atoms, are particularly suitable for use, together with commercially available polymeric, cationic retention aids, in a process for sizing paper or cardboard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.