Methods and compositions for enhancing sizing in papermaking process
US10006171B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2016 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Apr 25, 2036 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The disclosure relates to methods and compositions for enhancing the performance of a sizing agent in a papermaking process using a sizing agent enhancer. The sizing agent can be emulsified with an emulsifier and the sizing enhancer can be a polymer comprising at least one primary or secondary amine containing monomer. The method can comprise emulsifying the sizing agent with the emulsifier; and thereafter adding the emulsified sizing agent and the sizing enhancer, separately from or contemporaneously with the emulsified sizing agent, to a fiber furnish of a papermaking process. The combination of the emulsified sizing agent and the sizing enhancer improves the sizing of product paper over the use of the sizing agent without the sizing enhancer. In at least some embodiments, the emulsified sizing agent is ASA emulsified with a polymer comprising at least one primary or secondary amine containing monomer and the sizing enhancer comprises a diallylamine-acrylamide copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.