Universal Dispersant For Inorganic And Organic Pigments

A pigment preparation comprising

• (A) at least one organic and/or inorganic pigment and/or filler;
• (B) at least one anionic copolymer as dispersant, which contains
• (I) 40 to 95 mol % od structural units of an anionic monomer selected from the group of consisting of acrylic acid, methacrylic acid, itaconic acid, 2-carboxyethylacrylic acid, maleic acid, mixtures thereof and their respective salts, and
• (II) 5 to 60 mol % of structural units of a monomer having repeat units of formula (B1)
• in which
• R11, R12, and R13 independently of one another are selected from the group consisting of H, methyl and ethyl,
• R4 is H or an alkyl group having 1 to 4 carbon atoms,
• X is selected from the group consisting of O, COO, CONH, CH2O, and CH2CH2O,
• Y is an ethylene group
• Z is a propylene group, a butylene group or a phenylethylene group,
• m is an integer from 0 to 100,
• n is a integer from 1 to 100, and
• m+n is than 5, and
• (C) at least one nonionic copolymer, which contains at least one structural unit having aromatic groups and at least one structural unit having polyethylene glycol groups, and
• (H) water.

The pigment preparation as claimed in claim 1, wherein the copolymers (C) correspond to the formula (3), to the formula (4), or to mixtures thereof

• where
• n is an integer greater than or equal to 1,
• R1 is an aliphatic linear or branched hydrocarbon radical having 1 to 10 carbon atoms, a hydrogen atom, the structural unit —O—X, or the structural unit —CH2—O—X,
• X corresponds to the formula (5)
• in which
• o is an Integer from 1 to 50,
• p is an Integer from 1 to 200, and
• (o+p) is greater than 2.

The pigment preparation as claimed in claim 1, wherein the copolymers (C) correspond to the formula (6)

• in which
• q is an integer from 1 to 4,
• s is an integer from 5 to 50,
• R5 is H or an alkyl group having 1 to 4 carbon atoms,
• t is an integer from 0 to 10,
• u is an integer from 1 to 100, and
• t+u is greater than 10.

A method of producing a pigment preparation comprising (A) at least one organic and/or inorganic pigment and/or filler ater the method comprising the step of combining polymers (B) and (C) as dispersant wherein

• (B) is an anionic copolymer which contains
• (I) 40 to 95 mol % of structural units of an anionic monomer selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, 2-carboxyethylacrylic acid maleic acid, mixtures thereof and their respective salts, and
• (II) 5 to 60 mol % of structural units of a monomer having repeat units of formula (B1)
• in which
• R11, R12 and R13 independently of one another are selected from the group consisting of H, methyl and ethyl,
• R4 is H or an alkyl group having 1 to 4 carbon atoms,
• X is selected from the group consisting of O, COO, CONH, CH2O and CH2CH2O,
• Y is an ethylene group
• Z is a propylene group, a butylene group or a phenylethylene group,
• m is an integer from 0 to 100,
• n is an integer from 1 to 100, and
• m+n is greater than 5, and
• (C) is a nonionic copolymer, which contains at least one structural unit having aromatic groups and at least one structural unit having polyethylene glycol groups.