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US 6,281,350 B1Granted
Methods for the reduction of bleeding of lignosulfonates from lignosulfonate-treated substrates
AssigneePaper Technology Foundation Inc.
InventorsBlair Alex Owens, Dimitris Ioannis Collias, Andrew Julian Wnuk
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Abstract
The bleeding of lignosulfonates from lignosulfonate-treated substrates when contacted under humid conditions is reduced by rendering the lignosulfonates water-insoluble via reacting them with an amine polymer-epichlorohydrin adduct containing at least one quaternary ammonium group under acidic conditions.
Claims2
A method of rendering lignosulfonate water insoluble, said method comprising the step of mixing said lignosulfonate with an amine polymer-epichlorohydrin adduct containing at least one quaternary ammonium group under acidic conditions.
Dependencies are inferred from the claim text.