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US 12,129,324 B2Granted
Production of dispersants by nitroxide-mediated solution polymerization
AssigneeSika Technology AG
InventorsJürg Weidmann, Fabia Ulber, Jörg Zimmermann
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Abstract
Methods for using a copolymer, especially as a dispersant for solid particles, in particular as a dispersant for mineral binder compositions, where the copolymer is obtained from ionizable monomers m1 and side chain-bearing monomers m2 that are polymerized by nitroxide-mediated solution polymerization to give the copolymer, wherein the polymerization is conducted in the presence of an agent including a carboxyl group-bearing and phosphated alkoxy amine.
Claims19
A method of using a copolymer as a dispersant for solid particles comprising:
- mixing a dispersant with plurality of solid particles;
- wherein the dispersant comprises a copolymer obtained by polymerizing ionizable monomers m1 and side chain-bearing monomers m2 by nitroxide-mediated solution polymerization to give the copolymer, wherein the polymerization is conducted in the presence of an agent comprising a carboxyl-bearing phosphated alkoxy amine;
- and wherein the nitroxide-mediated solution polymerization is conducted at a pH in the range of 7.5-13,
- wherein the copolymer comprises a copolymer having block structure in which
- the side chain-bearing monomers m2 are present in at least one first block A,
- the ionizable monomers m1 are present in at least one second block B,
- any proportion of monomers m1 present in the first block A is less than 15 mol % based on all the monomers m2 in the first block A, and
- any proportion of monomers m2 present in the second block B is less than 15 mol % based on all the monomers m1 in the second block B.
5 more elements
Dependencies are inferred from the claim text.