Byk-chemie Gmbh

Astrid Rudolfi

Andreas Okkel

Jürgen Omeis

Bernd Göbelt

Guillaume Wojciech Jaunky

Udo Krappe

Marcus Meichsner

Daniel Leibig

Sandra Sabrina Meyer

Ina Van Kamp

Patrick Verkoyen

Holger Frey

Jan Blankenburg

The invention relates to a comb polymer having repeating units of at least one of the structures of formulae (I) to (IV) wherein Rrepresents a polyoxyalkylene group and A represents an organic group, and wherein the comb polymer has end groups of the general formula (V) wherein Rand Rindependent of each other are selected from a) organic groups having 1 to 24 carbon atoms and b) R.

Comb polymer and use thereof as dispersing agent

The invention relates to block copolymer comprising i) A first block wherein at least 65 mol-% of the repeating units of the first block are repeating units of the formula (I)—[CH—CH—O]—, ii) A second block wherein at least 90 mol-% of the repeating units of the second block are repeating units of at least one of formulae (II) or (III), wherein the groups R, R, and Rindependent of each occurrence are selected from hydrocarbyl groups having 1 to 40 carbon atoms, which are optionally substituted by ether or hydroxyl groups, and wherein the groups Rand Rare optionally linked to each other such that a nitrogen heterocyclic structure is present, iii) A third block which is different from the first block and the second block and which is more hydrophobic than the first block.

Amphiphilic block copolymer

The invention relates to comb copolymers, which can be produced from at least one diglycidyl ether (A) of general formula (I), at least one polyether monoamine (B) of the general formula R&#x2014;[OEt][OPr][OBu]&#x2014;NH, at least one amine (C) of the general formula Z&#x2014;R&#x2014;NH, and optionally at least one secondary amine (D) that is free of primary amino groups and is of the general formula NHTV, wherein R stands for a residue free of epoxy groups, selected from aliphatic residues, aromatic residues, and araliphatic residues; Rstands for a residue selected from alkyl residues having 1 to 6 carbon atoms; OEt stands for an ethylene oxide residue, OPr stands for a propylene oxide residue, and OBu stands for a butylene oxide residue; n stands for a number from 0 to 100, m stands for a number from 3 to 50, and s stands for a number from 0 to 20, and n+m+s=3 to 103; Rstands for an aliphatic, aromatic, or araliphatic hydrocarbon residue having 1 to 12 carbon atoms; Z stands for a residue free of primary and secondary amino groups and having at least one basic nitrogen atom, T and V do not contain any secondary amino groups and stand, independently of each other, for aliphatic residues having 1 to 12 carbon atoms, aromatic residues having 6 to 12 carbon atoms, or araliphatic residues having 7 to 12 carbon atoms, wherein the molar number of the sum of the primary amino groups of the polyether monoamines (B) and primary amino groups of the amines (C) divided by the molar number of the epoxy groups of the diglycidyl ethers (A) equals a value of &#x2153; to &#xbe;. The invention further relates to the production of the comb copolymers, dispersions, particulate preparations, wetting agents, and dispersants that contain the comb copolymers, to particles coated with the comb copolymers, and to the use of the comb copolymers as wetting agents and dispersants, in particular for increasing the jetness.

Epoxy/amine adducts for dispersing solids

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Krefeld, Germany

Astrid Rudolfi