Method for the emulsification of ASA with polyamidoamine epihalohydrin (PAE)
US8747616B2 · kind B2 · utility
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23References
9Claims
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Key dates
| Filing date | Sep 12, 2012 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Sep 12, 2032 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is directed towards methods and compositions for improving the sizing of paper using PAE. Proper sizing of paper requires that a sizing agent adequately disperse so as to evenly distribute on the paper. Proper sizing also requires that the agent not cause runnability or chemical problems with other materials or equipment used in the papermaking process. PAE displays unexpected attributes that allow it to disperse sizing agents. Best of all it is not subject to the same overdose effect of typical emulsifiers such as cationic starch. As a result PAE is an excellent option for use in sizing paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.