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Molecular Biology

Dispersion-of-pigment-or-dyestuff-in-organic-liquid

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Dispersion of pigment or dyestuff in organic liquid

Details

Inventors: Hauxwell, Frank; Stansfield, James F.; Topham, Arthur;
Assignee: Imperial Chemical Industries Limited (London, GB2)
Primary Examiner: Lieberman; Allan
Assistant Examiner:
Attorney, Agent or Firm: Cushman, Darby & Cushman

Dispersing agents comprising the adducts of one or more compounds from each of the following classes: (a) an organic compound containing two or more isocyanate groups, (b) an organic compound containing two or more groups which are reactive with isocyanate groups, and (c) a compound of the formula: Z--X--E--T--D).sub.n-1 Q wherein Z represents --OH or --NHR, wherein R is a monovalent hydrocarbon radical; X is an optionally substituted divalent hydrocarbon radical; T is a divalent hydrocarbon radical; N is a positive integer; Q is an optionally substituted monovalent hydrocarbon radical; And E is a ##STR1## group WHEREIN R' is a hydrogen atom or a monovalent hydrocarbon radical, And D is ##STR2## group provided that only one of E and D is connected to T via the carbon atom of the carbonyl group present in D and E, and the compound contains at least one chain having at least five carbon atoms, a process for the manufacture of the said dispersing agents, and their use in the preparation of finely divided dispersions of solids in organic liquids.

DETAILED DESCRIPTION We claim: 1.
Compositions of matter comprising a finely divided dispersion containing between 5 and 70% by weight based on the total weight of the composition of a solid dyestuff or pigment in an inert liquid hydrocarbon or an inert chlorinated hydrocarbon containing dissolved therein between 5% and 100% by weight based on the weight of the pigment or dyestuff of a dispersing agent which is an adduct of one or more compounds from each of the following classes: (a) a polyisocyanate selected from the group consisting of 4:4'-diisocyanatodiphenylmethane, 2:4-diisocyanatotoluene, 2:6-diisocyanatotoluene and mixtures of 2:4- and 2:6-diisocyanatotoluene; (b) an aliphatic diol containing from 5 to 10 carbon atoms; and (c) a compound of the formula: Z--X--E--(T--D).
sub.
n-1 --Q wherein Z represents --OH or --NHR, wherein R is alkyl or alkenyl containing up to 18 carbon atoms; X is divalent aliphatic hydrocarbon, or a chloro substituent thereof, containing up to 17 carbon atoms; T is divalent aliphatic hydrocarbon containing up to 17 carbon atoms; n is a positive integer from 1 to 8; Q is alkyl or alkenyl containing up to 18 carbon atoms or a hydroxy substituent thereof; E is ##STR21## wherein R.
sup.
1 is hydrogen or R; and D is ##STR22## provided that only one of E and D is connected to T via the carbon atom of the carbonyl group present in E and D and that at least one of the groups represented by X, T, Q, R & R.
sup.
1 contains a carbon chain having from 5 to 18 carbon atoms.
2.
Compositions of matter as claimed in claim 1 wherein the particle of the solid is less than 20 microns.
3.
Compositions of matter as claimed in claim 1 wherein the solid is a dyestuff.
4.
Compositions of matter as claimed in claim 3 wherein the dyestuff is a disperse dyestuff.
5.
Compositions of matter as claimed in claim 1 wherein the solid is an inorganic pigment.
6.
Compositions of matter as claimed in claim 1 wherein the solid is an organic pigment.
7.
Compositions of matter as claimed in claim 6 wherein the organic pigment as a phthalocyanine pigment

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