Paper making and fiber liberation – Processes and products – Non-fiber additive
Patent
1984-10-22
1985-08-27
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-fiber additive
1621646, D21H 358
Patent
active
045376573
ABSTRACT:
Disclosed are novel wet strength resins for paper. The resins are produced by reacting an epihalohydrin, such as epichlorohydrin, with an aminopolyamide-polyureylene intermediate derived by reacting methylbisaminopropylamine with oxalic acid or a diester of oxalic acid and with urea.
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patent: 3645954 (1972-02-01), Terada et al.
patent: 3793279 (1974-02-01), Lipowski
patent: 3887510 (1975-06-01), Chan et al.
patent: 3891589 (1975-06-01), Ray-Chaudhuri
patent: 4388439 (1983-06-01), Maslanka
Chin Peter
Deming Hazel L.
Hercules Incorporated
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