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Dispersing agents
| Details |
Inventors: Hauxwell, Frank; Stansfield, James Frederick; Topham, Arthur;
Assignee: Imperial Chemical Industries Limited (London, EN)
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 ##STR1## WHEREIN R' is a hydrogen atom or a monovalent hydrocarbon radical, and D is a ##STR2## 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. |
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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 80:20 mixture of 2:4 and 2:6 diisocyanatotoluent, 1:6 hexanediol and a compound of the formula: z -- X -- E -- Q wherein Z represents --OH; X is a divalent aliphatic hydrocarbon, or a chloro substituent thereof, containing from 10 to 17 carbon atoms; Q is alkyl or alkenyl containing from 12 to 18 carbon atoms or a hydroxy substituent thereof; and E is ##STR17## 2.
Compositions of matter as claimed in claim 1 wherein the particle size 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 is a phthalocyanine pigment.
Description:
This invention relates to dispersing agents which are especially valuable for the production of dispersions of solids, in particular pigments or dyestuffs, in organic liquids.
According to the invention there are provided as dispersing agents 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 ##STR3## WHEREIN R' is a hydrogen atom or a monovalent hydrocarbon radical, and D is a ##STR4## 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
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