Sedimentation-Stabilized Water-Based Pigment Preparations
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United States of America Patent
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Issued Date -
Jun 27, 2013
app pub date -
Aug 17, 2011
filing date -
Sep 4, 2010
priority date (Note) -
Abandoned
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Abstract
The invention relates to aqueous pigment preparations, containing (A) 1 to 75 wt % of an organic or inorganic white or colored pigment or a mixture of various organic or inorganic white or colored pigments, (B) 0.01 to 40 wt % of one or more wetting and dispersing additives, (C) 0.01 to 5 wt % of a water-soluble or water-swellable, cross-linked copolymer containing 50 to 98.99 wt % of acrylamidoalkylsulfonic acid and salts thereof of the formula (I), 1 to 49.99 wt % of cyclic N-vinylcarboxamides of the formula (II), and 0.01 to 8 wt % of a cross-linking monomer having at least 2 olefinically unsaturated units, wherein R is a hydrogen atom or a methyl group, A is a linear or branched alkylene group having 1 to 8 carbon atoms, M is a hydrogen atom, ammonium, or an alkali metal ion, and n is an integer from 2 to 9.
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