Additive for production of paper

Details Additive for production of paper Additive for production of paper

1991-10-21

1993-10-12

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621683, D21H 1741

Patent

active

052521842

ABSTRACT:
An additive for paper production, comprising an amphoteric polymeric electrolyte having as an essential component thereof a structural unit represented by the following general formula I: ##STR1## wherein n is an integer in the range of 1 to 5, R.sup.1, R.sup.2, and R.sup.3 are independently hydrogen atom or an alkyl group, R.sup.4 is hydrogen atom, an alkyl group, or a hydroxyalkyl group, and a and b are jointly relative numerals such that the a/b ratio is in the range of 0.2 to 45.0), having at least part of the amino group of said amphoteric polymeric electrolyte neutralized, and possessing a cation equivalent amount (Cv) in the range of 1.0 to 15.0 meq/g, an anion equivalent amount (Av) in the range of 0.1 to 7.0 meq/g, and a Cv/Av ratio in the range of 0.2 to 45.0.

REFERENCES:
patent: 2838397 (1958-06-01), Gruntfest et al.
patent: 3280218 (1966-10-01), Endsley et al.
patent: 3372149 (1968-03-01), Fertig et al.
patent: 3658474 (1972-04-01), Rothwell
patent: 4392917 (1983-07-01), Lipowski

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