Strength resins for paper and repulpable wet and dry strength paper made therewith
US6103861A · kind A · utility
17Cited by
19References
60Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1997 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Dec 19, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An ionic thermosettable resin useful for imparting wet and dry strength to paper is made by: (a) providing a copolymer comprising monomer units derived by copolymerization of acrylamide or alkyl-substituted acrylamide and diallylamine or an acid salt thereof; and (b) reacting the copolymer with epihalohydrin or epihalohydrin equivalent and dialdehyde. Paper products made using the resin are more easily repulped than paper products made with conventional wet strength resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.