US 4,013,687 AGranted

Anthraquinone dispersing agents

AssigneeImperial Chemical Industries PLC

InventorsHugh Patrick Dryhurst Paget, Leslie Richard Rogers, James Kenneth Davenport Royle, James Frederick Stansfield, Arthur Topham

Life of this patent

Estimating the term…

patentgrep

Loading patent…

Abstract

Dyestuffs of the formulae D--Z--O--OC--X--O).sub.y H].sub.n and D--Z--O--OC--X--O).sub.(y.sub.-1) COT].sub.n wherein D is the radical of an anthraquinone dyestuff which is attached to Z through a carbon atom of an aromatic ring present in D; Z is a divalent bridging group; n is a positive integer having a value of 1 to 4; X is a divalent saturated or unsaturated aliphatic radical containing at least 8 carbon atoms and in which there are at least 4 carbon atoms between the --CO-- and --O-- groups; T is a saturated or unsaturated aliphatic radical of from 8-20 carbon atoms and y is a positive number in the range 2-20 inclusive. A process for making the above dyestuffs and their use as dispersing agents in the stabilization of dispersions of finely divided solids.

Claims4

Dependent claims

A dyestuff selected from the classes of dyestuff represented by the formulae

D -- Z -- O -- OC -- X -- O).sub.y H].sub.n
D -- Z -- O -- OC -- X -- O).sub.(y.sub.-1) COT].sub.n
or mixtures thereof
wherein D is an anthraquinone radical which is free from water solubilising groups and which is attached to Z through a carbon atom on one of the benzene rings present in D;
n is 1 to 4;
Z is a linking group of the formula -- B).sub.m A -- wherein B is --NH--, --SO.sub.2 NH-- or --CO--NH--, m is 0 or 1 and A is alkylene or .beta.-hydroxy-alkylene containing up to 20 carbon atoms or monocyclic arylene-lower-alkylene, X is alkylene or alkenylene containing from 8 to 20 carbon atoms with at least 4 carbon atoms between the --CO-- and --O-- groups, T is alkyl or alkenyl containing from 8 to 20 carbon atoms and y is a positive integer between 2 and 20.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/531,370Filed 10 Dec 1974 · continuation in part
Priority: UK 4445/7111 Feb 1971
Granted: 22 Mar 1977
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

C09B 68/41
Characterised by the chemical nature of the attached groups: polymers attached to the pigment surface
C09B 1/12
Preparation from starting materials already containing the anthracene nucleus: dyes containing sulfonic acid groups
C09B 1/20
Amino-anthraquinones: preparation from starting materials already containing the anthracene nucleus
C09B 1/503
Amino-hydroxy-anthraquinones; Ethers and esters thereof: unsubstituted amino-hydroxy anthraquinone