High efficiency wet strength resins from new cross-linkers
US10711401B2 · kind B2 · utility
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Key dates
| Filing date | Oct 2, 2017 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | Apr 13, 2038 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Compositions and methods related to new wet strength resins are provided. By using functionally-symmetrical cross-linkers and mono-functional modifiers, and separating the steps of reacting a prepolymer with the cross-linkers from the reaction of intermediate cross-linked prepolymer with epichlorohydrin, new wet strength resin products are provided having improved properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.