Temporary wet strength resins with nitrogen heterocyclic nonnucleophilic functionalities and paper products containing same
US4981557A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Apr 26, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Temporary wet strength resins, and paper products containing same, having a molecular weight of from about 20,000 to about 200,000, most preferably from about 30,000 to aboug 95,000 having the fomula: ##STR1## wherein: A is 0 or ##STR2## and X is --O--, --NH--, or --NCH.sub.3 --, and R is a substituted or unsubstituted aliphatic group; Y.sub.1 and Y.sub.2 are independently --H, --CH.sub.3, or a halogen; W is a nonnucleophilic, water-soluble nitrogen heterocyclic moiety; and Q is a cationic monomeric unit. The mole percent of "a" ranges from about 30% to about 70%, preferably from about 45% to about 55%; the mole percent of "b" ranges from about 30% to about 70%, preferably from about 45% to about 55%; and the mole percent of "c" ranges from about 1% to about 40%, most preferably from about 2% to about 5%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.