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1. (WO2017001666) SOLUTION DE MOUILLAGE ET ENCRE ÉCOLOGIQUES DESTINÉ À UN PROCÉDÉ D'IMPRESSION OFFSET HUMIDE, ET PROCÉDÉ D'IMPRESSION OFFSET HUMIDE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

1. A kit for wet offset printing a security feature on a substrate, said kit comprising:

a) an oxidative drying ink comprising at (east one oxidative drying varnish and one or more neutral manganese complex compounds having the formula (I)


wherein

R1 are identical or different from each other and selected from the group consisting of C Cie-alkyls, C Cie-alkenyls, C,-C18-alkynyls and C3-C12- cycloalkyls;

is an integer in a range between 1 and 5;

X, Y and Z are identical or different from each other and selected from R2COO ;

R2 are identical or different from each other and selected from the group consisting of H, CrC58-alkyls, C,-C1e-alkenyls, C Cie-alkynyls, C3-C,2- cycloalkyls, C3-C,2-cycloalkeny!s, C C^-heterocycloalkyls and C7-C,2- aralkyls; and

b) a fountain solution comprising one or more manganese (II) salts of a C,-C3 carboxylic acid.

2. The kit according to claim 1 , wherein the one or more neutral manganese complex compounds of the oxidative drying ink are compounds or mixtures of compounds of structure (II)

(II)

wherein

X, Y and Z are identical or different from each other and selected from the group consisting of CH3-COO" or CH3-(CH2)3-CH(CH3CH2)COO", and

n is an integer in a range between 1 and 4.

3. The kit according to any of the preceding claims, wherein the fountain solution comprises the one or more manganese (II) salts of a C C3 carboxylic acid in an amount from 0.001 to 5 wt.%, preferably from 0.05 to 2 wt.%, all amounts given in wt.% being based on the total weight of the fountain solution.

4. The kit according to any of the preceding claims, wherein the one or more manganese (II) salts of the fountain solution are selected from manganese (II) formate and manganese (II) acetate.

5. The kit according to any of the preceding claims, wherein the fountain solution further comprises at least one component selected from:

one or more acids;

one or more other phi adjusting compounds, wherein an acid and another pH adjusting compound optionally form together a buffer, wherein the total amount of acids and other pH adjusting compounds, if present, is preferably from about 0.1 to about 3 wt.%;

one or more water-soluble organic solvents, if present, preferably in an amount from about 3 to about 20 wt.%;

one or more surfactants, if present, preferably in an amount from about 0.0001 to about 1 wt.%;

one or more polymeric desensitizers, if present, preferably in an amount from about 0.01 to about 1 wt.%; and

one or more chelating agents, if present, preferably in an amount from about 0.001 to about 0.5 wt.%,

wherein all amounts given in wt.% being based on the total weight of the fountain solution.

6. The kit according to any preceding claim, wherein the fountain solution has a pH of 4 to 6, and wherein said pH is preferably adjusted by a buffer, preferably a citric acid/citrate buffer.

7. A process for printing a security feature on a substrate by a wet offset printing process comprising the steps of:

a) wetting a printing plate with a fountain solution comprising one or more manganese (II) salts of a C1 -C3 carboxylic acid,

b) inking the printing plate with an oxidative drying ink, and

c) transferring the oxidative drying ink from the printing plate in an offset printing machine to a substrate so as to print a security feature on the substrate,

wherein the oxidative drying ink comprises at least one oxidative drying varnish and one or more neutral manganese complex compounds having the formula (I)


(I)

wherein

R1 are identical or different from each other and selected from the group consisting of C-i-Cie-alkyls, C-Cte-alkenyls, C C,R-alkynyls and C C,2- cycloalkyls;

n is an integer in a range between 1 and 5;

X, Y and Z are identical or different from each other and are selected from R COO";

R2 are identical or different from each other and selected from the group consisting of H, C C18-a!kyls, Ci-C18-alkenyls. C Ci8-alkynyls, C3-C12- cycloalkyls. C3-C,2-cycloalkenyls, C Ci2-heterocycloalkyls and C7-G12- aralkyls; and

and wherein the fountain solution comprises one or more manganese (II) salts of a C C3 carbox- ylic acid.

8. The process according to claim 8, wherein in step (b) the printing plate is indirectly wetted.

9, The process according to any one of claims 7 to 8, wherein the one or more neutral manganese complex compounds of the oxidative drying ink are compounds or mixtures of compounds of structure (II)

(li)

wherein

X, Y and Z are identical or different from each other and selected from the group consisting of CH3-COO" or CH3-(CH2)3-CH(CH3CH2)COO and

n is an integer in a range between 1 and 4.

10. The process according to any one of claims7 to 9, wherein the fountain solution comprises the one or more manganese (II) salts of a C C3 carboxylic acid in an amount from 0.001 to 5 wt.%, preferably from 0.05 to 2 wt.%, all amounts given in wt.% being based on the total weight of the fountain solution.

11. The process according to any one of claims 7 to 10, wherein the one or more manganese (II) salts of the fountain solution are selected from manganese (II) formate and manganese (II) acetate

12. The process according to any one of claims 7 to 11 , wherein the fountain solution further comprises at least one component selected from:

one or more acids;

one or more other pH adjusting compounds, wherein an acid and another pH adjusting compound optionally form together a buffer, wherein the total amount of acids and other pH adjusting compounds, if present, is preferably from about 0.1 to about 3 wt.%;

one or more water-soluble organic solvents, if present, preferably in an amount from about 3 to about 20 wt.%;

one or more surfactants, if present, preferably in an amount from about 0.0001 to about 1 wt.%;

one or more polymeric desensitizers, if present, preferably in an amount from about 0.01 to about 1 wt.%; and

one or more chelating agents, if present, preferably in an amount from about 0.001 to about 0 5 wt.%,

wherein all amounts given in wt.% being based on the total weight of the fountain solution.

13 The process according to any one of claims 7 to 12, wherein the fountain solution has a pH of 4 to 6, and wherein said pH is preferably adjusted by a buffer, preferably a citric acid/citrate buffer, a phosphoric acid/phosphate buffer, succinic acid/succinate buffer or a mixture thereof.

14. The process according to any one of claims 7 to 13, wherein the substrate is selected from the group consisting of offset papers, fiduciary papers, polymer-based substrates and composite materials.

A use of the oxidative drying ink recited in any one of claim 1 to 6 and the fountain solution recited in any one of claim 1 to 6 for a wet offset printing process, preferably for a wet offset printing process in which the printing plate is indirectly wetted.