Aqueous pigment dispersions
AssigneeBadische Anilin- & Soda-Fabrik Aktiengesellschaft
InventorsHorst Belde, Knut Oppenlaender, Ewald Daubach, Rolf Fikentscher
Life of this patent
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Abstract
An aqueous pigment dispersion which contains (a) pigment, (b) a water-soluble surfactant and water and a water-retaining agent in which (b) is a reaction product of a polyhydroxyl compound with from 3 to 50 moles of propylene oxide and from 2 to 70 moles of ethylene oxide per equivalent of hydroxyl. The dispersions give bright and deep-shade emulsion paints or distempers containing cellulose ethers.
Claims7
An aqueous pigment dispersion which does not flocculate in a cellulose-ether-containing emulsion paint or distemper which contains, with reference to the total weight of (a) + (b) + (c),
- a. from 20 to 55% by weight of a finely divided pigment;
- b. from 5 to 25% by weight of a water-soluble surfactant or mixture of surfactants obtained by reaction of a hydroxyl compound of the formula:
- A(OH).sub.m in which
- A is an m-valent aliphatic or cycloaliphatic radical of two to 10 carbon atoms,
- Oh is primary or secondary hydroxyl;
- and
- m is one of the integers from 2 to 6;
- with from 3 to 50 moles of propylene oxide per equivalent of primary and secondary hydroxyl and then with from 2 to 70 moles of ethylene oxide per equivalent of primary and secondary hydroxyl and
- c. from 40 to 75% by weight of a mixture of water and a waterretaining agent.
Dependencies are inferred from the claim text.