Blends of polymers as wet strengthening agents for paper
US10633798B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2017 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Jan 14, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L61/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Resin systems and methods for making and using same are provided. The method for making a paper product can include contacting a plurality of pulp fibers with a resin system. The resin system can include a first polyamidoamine-epihalohydrin resin and a second resin that can include a second polyamidoamine-epihalohydrin resin, a urea-formaldehyde resin, or a mixture thereof to produce a paper product. The first resin and the second resin can be sequentially or simultaneously contacted with the plurality of pulp fibers. The period for sequential addition between the first resin and the second resin is about 1 second to about 1 hour.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.