Polybase from amino amido carboxylic acid, polyamine and difunctional alkylating agent
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United States of America Patent
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Dec 11, 1990
Grant Date -
N/A
app pub date -
Sep 5, 1989
filing date -
Oct 14, 1988
priority date (Note) -
Expired
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Abstract
A water-soluble organic polybase which is useful for the cationization of asbestos-free, cellulose fiber filter media is prepared by reacting a mixture of a compound of the formula R.sup.2 --CO--R.sup.1 --COOH and a polyalkyleneimine with a difunctional alkylating agent, wherein R.sup.1 is a single bond or alkylene having 1 to 10 carbon atoms and R.sup.2 is inter alia a moiety of the formula H.sub.2 N--(CH.sub.2).sub.u --NH--(CH.sub.2).sub.u --NH).sub.w wherein u is the number 2, 3, 4 or 5 and w is the number 0, 1, 2 or 3.
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