COLORANT CATCHER MATERIAL
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United States of America Patent
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Issued Date -
Jun 11, 2020
app pub date -
Nov 2, 2017
filing date -
Nov 3, 2016
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Abstract
A colorant catcher material includes a) a substrate and b) a colorant-catching additive. The colorant-catching additive is selected from the group consisting of polyvinylamines in form of homopolymers, copolymers and/or partial salts thereof, polyethylenimines in form of homopolymers, copolymers and/or partial salts thereof, and mixture thereof. The colorant-catching additive is fixed on the substrate by c) a fixing agent selected from the group consisting of dialdehydes with the carbon number of from 2 to 8. Also disclosed is a method for preparing the colorant catcher material and use of the same for catching colorants or removing dirt in an aqueous medium, particularly a laundry washing solution.
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