Aqueous dispersions containing a synergistic dispersant combination
First Claim
1. Aqueous dispersions of fillers and/or pigments, which contain a synergistic dispersant combination of the following compositions:
- A) 50 to 80% by weight of a water-soluble polymer selected from the group consisting of cellulose derivatives, sulphonated polyesters and hydrolysates of polyacrylonitrile, including carboxymethylcellulose, homopolymers and copolymers of methacrylic and/or acrylic acid and their salts with molecular weights in the range from 800 to 40,000,B) 10 to 40% by weight of a non-ionic alkylene oxide adduct of the formula ##STR11## in which R4 denotes an optionally stubstituted aliphatic, aromatic or araliphatic radical having 1 to 40 carbon atoms,R5 denotes hydrogen, phenyl or alkyl radical having 1 to 12 C atoms andn denotes a number from 2 to 300.n preferably denotes 4 to 100, andD) 10 to 30% by weight of a compound of the formula ##STR12## in which R7 is hydrogen, a monovalent metal ion or an optionally substituted ammonium ion andY is hydrogen, a monovalent metal ion or an optionally substituted ammonium ion,where the sum A) +B) +D) gives 100% by weight.
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Abstract
Aqueous dispersions of fillers and/or pigments contain a dispersant combination of the following composition:
A) 40 to 95 by weight of a water-soluble polymer,
B) 0 to 60 by weight of a non-ionic alkylene oxide adduct having an average molecular weight of 200 to 100,000,
C) 0 to 60% by weight of compounds of the formulae (I), (II) and/or (III) ##STR1## in which R1 represents an optionally substituted aliphatic, aromatic or araliphatic radical having 1 to 50 C atoms,
z in each case independently of one another represents an integer from 1 to 10 and
x represents hydrogen, a monovalent metal ion or an optionally substituted ammonium ion and
D) 0 to 60% by weight of a compound of the formula (IV) ##STR2## in which Q represents hydrogen, ##STR3## in which Y in each case independently of one another represents hydrogen, a monovalent metal ion or an optionally substituted ammonium ion,
R2 in each case independently of one another represents hydrogen, an optionally substituted alkyl radical having 1 to 12 C atoms or a radical of the type --CH2 --COOR3 or --CH2 CH2 COOR3 and
R3 in each case independently of one another represents hydrogen, Y or an optionally substituted alkyl radical having 1 to 25 C atoms,
where the sum A) +B) +C) +D) gives 100% by weight and at least one of the components B), C) and D) is different from zero.
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Citations
8 Claims
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1. Aqueous dispersions of fillers and/or pigments, which contain a synergistic dispersant combination of the following compositions:
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A) 50 to 80% by weight of a water-soluble polymer selected from the group consisting of cellulose derivatives, sulphonated polyesters and hydrolysates of polyacrylonitrile, including carboxymethylcellulose, homopolymers and copolymers of methacrylic and/or acrylic acid and their salts with molecular weights in the range from 800 to 40,000, B) 10 to 40% by weight of a non-ionic alkylene oxide adduct of the formula ##STR11## in which R4 denotes an optionally stubstituted aliphatic, aromatic or araliphatic radical having 1 to 40 carbon atoms, R5 denotes hydrogen, phenyl or alkyl radical having 1 to 12 C atoms and n denotes a number from 2 to 300. n preferably denotes 4 to 100, and D) 10 to 30% by weight of a compound of the formula ##STR12## in which R7 is hydrogen, a monovalent metal ion or an optionally substituted ammonium ion and Y is hydrogen, a monovalent metal ion or an optionally substituted ammonium ion, where the sum A) +B) +D) gives 100% by weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification