High efficiency wet strength resins from new cross-linkers
US9982395B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | May 29, 2015 |
| Grant date | May 29, 2018 |
| Priority date | — |
| Expiry date | Aug 15, 2035 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H23/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Strengthening resins and methods for making and using same. The strengthening resin can include a polyamine partially cross-linked with a bridging moiety and having azetidinium ions. The bridging moiety can be derived from a functionally symmetric cross-linker. The functionally symmetric cross-linker can include a diisocyanate, a 1,3-dialkyldiazetidine-2,4-dione, a dianhydride, a diacyl halide, a dienone, a dialkyl halide, or any mixture thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.