Grafted comb polymers based on acryloyldimethyltaurine acid
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United States of America Patent
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Nov 15, 2005
Grant Date -
Jun 17, 2004
app pub date -
Nov 28, 2001
filing date -
Dec 1, 2000
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Abstract
The invention provides water-soluble or water-swellable copolymers obtained by free-radical copolymerization of A) acryloyldimethyltaurine and/or acryloyldimethyltaurates, B) optionally, one or more other olefinically unsaturated, noncationic, optionally crosslinking comonomers containing at least one oxygen, nitrogen, sulfur or phosphorus atom and possessing a molecular weight of less than 500 g/mol, C) one or more mono- or polyolefinically unsaturated, optically crosslinking macromonomers each possessing at least one oxygen, nitrogen, sulfur or phosphorus atom and having a number-average molecular weight of greater than or equal to 200 g/mol, and D) taking place in the presence of at least one polymeric additive having number-average molecular weight of from 200 g/mol to 109 g/mol.
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