Reyniers, Sylvain Leontina Edmond; S'Jegers, Karen;

Metal carboxylates

Basic zirconium carboxylates of branched chain aliphatic monocarboxylic acids having 5 to 10 carbon atoms are disclosed. The carboxylates may be used, inter alia, as driers for paints and inks.

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We claim:

1. A basic zirconium carboxylate in solution in, or in admixture with, an organic liquid, the carboxylate groups in the basic zirconium carboxylate consisting essentially of groups derivable from at least one branched chain aliphatic monocarboxylic acid which has 5 to 10 carbon atoms and in which any branching group(s) on the .alpha.-carbon atom contain(s) at most one carbon atom, and the proportion of zirconium being more than 12% by weight, based on the weight of the basic zirconium carboxylate and the liquid.

2. A zirconium carboxylate of claim 1, wherein the carboxylate groups are derivable from at least two acids having the same number of carbon atoms.

3. A zirconium carboxylate of claim 1, wherein the carboxylate groups are derivable from at least two acids having different numbers of carbon atoms.

4. A zirconium carboxylate as claimed in claim 1, wherein, in at least one acid from which the carboxylic groups are derived, the aliphatic chain, including any branching groups, is made up of carbon and hydrogen atoms only, and is saturated.

5. A zirconium carboxylate as claimed in claim 1, wherein, wherein, in at least one acid from which the carboxylic groups are derived, the one or more branching group is a methyl group or, in the case of a branching group on a carbon atom other than the .alpha.-carbon atom, an ethyl group.

6. A zirconium carboxylate as claimed in claim 1, wherein, in at least one acid from which the carboxylate groups are derived, there is at least one branching group on a carbon atom other than the .alpha.-carbon atom.

7. A zirconium carboxylate as claimed in claim 6, wherein the said one acid also has at least one methyl group on the .alpha.-carbon atom.

8. A zirconium carboxylate as claimed in claim 1, wherein said at least one acid from which the carboxylate groups are derived contains 7 to 9 carbon atoms.

9. A zirconium carboxylate as claimed in claim 1, wherein the carboxylate groups consist essentially of groups derivable from a mixture of acids each having 8 carbon atoms and being branched predominantly in non-.alpha. positions.

10. A zirconium carboxylate as claimed in claim 1, wherein the proportion of zirconium is more than 18% by weight, based on the weight of the basic zirconium carboxylate and the liquid.

11. A zirconium carboxylate as claimed in claim 10, wherein the said proportion is at least 24% by weight.

12. A zirconium carboxylate as claimed in claim 1, which is in the form of a colloidal solution in the liquid.

13. A process for preparing a basic zirconium carboxylate as claimed in claim 1, which comprises reacting zirconyl carbonate and at least one monocarboxylic acid as specified in claim 1, the reaction being carried out in an inert liquid medium.

14. A paint or ink comprising an unsaturated compound and a zirconium carboxylate of claim 1.

15. A paint or ink of claim 14 wherein the proportion of liquid zirconium carboxylate is 0.05 to 0.5 wt. % based on the total composition including any other constituents.

16. A paint or ink of claim 14 which also contains a carboxylate of cobalt, manganese, calcium, lead, barium, or zinc.