Storage-stable pigmented formulations containing isocyanate groups and use thereof
The invention relates to storage-stable pigmented formulations containing isocyanate groups, comprising at least one pigment a., at least one component b. containing isocyanate groups, at least one wetting agent and/or dispersant c., at least one grind resin d. and optionally solvents, wherein the formulation has a viscosity increase of less than 500% after storage at 50° C. over a period of at least 3 days. The invention also relates to the production of such formulations and to the use thereof.
1 . A storage-stable, isocyanate group-containing formulation comprising the components:
a. at least one pigment,
b. 59.2% to 92.1% by weight of at least one isocyanate group-containing component based on a total weight of the storage-stable, isocyanate group-containing formulation,
c. at least one wetting agent and/or dispersant,
d. at least one grinding resin, and
e. optionally solvents,
wherein the storage-stable, isocyanate group-containing formulation after storage at 50° C. over a period of at least 14 days exhibits a rise in viscosity of less than 300%, based on a starting viscosity of the storage-stable, isocyanate group-containing formulation,
wherein the storage-stable, isocyanate group-containing formulation comprises at least one component having at least one isocyanate-reactive group, wherein a molar ratio of isocyanate groups of component b to a sum of all isocyanate-reactive groups in the storage-stable, isocyanate group-containing formulation is at least 11:1.
2 . The storage-stable, isocyanate group-containing formulation as claimed in claim 1 , comprising
a. 0.01% to 45% by weight of the at least one pigment;
b. 59.2% to 92.1% by weight of the at least one isocyanate group-containing component;
c. 0.01% to 20% by weight of the at least one wetting agent and/or dispersant;
d. 0.1% to 30% by weight of the at least one grinding resin; and
e. 0% to 80% by weight of the solvents;
in each case based on a total weight of the storage-stable, isocyanate group-containing formulation, with a sum of all constituents in the storage-stable, isocyanate group-containing formulation not exceeding 100% by weight.
3 . The storage-stable, isocyanate group-containing formulation as claimed in claim 1 , wherein the isocyanate group-containing component b comprises 1,4-diisocyanatobutane, 1,5-diisocyanatopentane, 1,6-diisocyanatohexane, 2-methyl-1,5-diisocyanatopentane, 1,5-diisocyanato-2,2-dimethylpentane, 2,2,4- or 2,4,4-trimethyl-1,6-diisocyanatohexane, 1,10-diisocyanatodecane, 1,3- or 1,4-bis(isocyanatomethyl)benzene, 1,3- or 1,4-bis(1-isocyanato-1-methylethyl)benzene, 2,4- or 2,6-diisocyanatotoluene, 2,4′- or 4,4′-diisocyanatodiphenylmethane, 1,5-diisocyanatonaphthalene, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane, 1-isocyanato-1-methyl-4(3)-isocyanatomethylcyclohexane, 2,4′- or 4,4′-diisocyanatodicyclohexylmethane, optionally oligomers or reaction products of these, or a mixture of at least two of these.
4 . The storage-stable, isocyanate group-containing formulation as claimed in claim 1 , wherein the isocyanate group-containing component b consists of aliphatic or cycloaliphatic isocyanates.
5 . The storage-stable, isocyanate group-containing formulation as claimed in claim 1 , wherein the storage-stable, isocyanate group-containing formulation has at least one of the following properties (A)-(D) at room temperature:
(A) a starting viscosity in a range from 1 to 200 mPa·s;
(B) a starting viscosity in a range from 30 to 1000 mPa·s;
(C) a starting viscosity in a range from 50 to 2000 mPa·s;
(D) a starting viscosity in a range from 1000 to 100,000 mPa·s;
wherein the storage-stable, isocyanate group-containing formulation additionally has the following property: (E) a content of isocyanate groups of less than 60% by weight, based on a total weight of the storage-stable, isocyanate group-containing formulation.
6 . The storage-stable, isocyanate group-containing formulation as claimed in claim 1 , wherein the storage-stable, isocyanate group-containing formulation exhibits a rise in particle size of less than 500% on storage at 50° C. and standard pressure over a period of 3 days, as compared to an original particle size of the storage-stable, isocyanate group-containing formulation, based on Z average measured by dynamic light scattering, wherein the Z-average represents an intensity-weighted harmonic mean of a hydrodynamic diameter.
7 . The storage-stable, isocyanate group-containing formulation as claimed in claim 1 , wherein the grinding resin d comprises monoalcohols or polyalcohols, monothiols or polythiols, monoamines or polyamines, condensation resins originating from a polyaldol reaction, or a mixture of at least two of these.
8 . The storage-stable, isocyanate group-containing formulation as claimed in claim 1 , wherein the molar ratio of isocyanate groups of component b to the sum of all isocyanate-reactive groups in the storage-stable, isocyanate group-containing formulation is at least 20:1.
9 . A method for coating of substrate surfaces, comprising applying the storage-stable, isocyanate group-containing formulation of claim 1 to a substrate surface to obtain a coated object.
10 . The coated object obtained as claimed in claim 9 .
11 . An ink, comprising the storage-stable, isocyanate group-containing formulation of claim 1 .
12 . A method of digital printing, comprising applying the ink of claim 11 to a substrate surface.
13 . A printed object obtained using the storage-stable, isocyanate group-containing formulation as claimed in claim 1 as an ink.
14 . The printed object as claimed in claim 13 , wherein a material of the object comprises textile, wood, plastic, glass, ceramic, carbon, metal, or a combination of at least two of these.
15 . A process for preparing a storage-stable, isocyanate group-containing formulation at least comprising:
i. dispersing at least one pigment in at least one grinding resin in the presence of at least one wetting agent and/or dispersant, to obtain a pigment dispersion,
ii. optionally diluting the pigment dispersion with solvent,
iii. mixing the pigment dispersion with 59.2% to 92.1% by weight of an isocyanate group-containing component based on a total weight of the storage-stable, isocyanate group-containing formulation and at least one component having at least one isocyanate-reactive group to obtain the storage-stable, isocyanate group-containing formulation,
wherein a ratio of a sum of isocyanate groups to a sum of all isocyanate-reactive groups in the storage-stable, isocyanate group-containing formulation is at least 11:1,
wherein the storage-stable, isocyanate group-containing formulation after storage at 50° C. over a period of at least 14 days exhibits a rise in viscosity of less than 300%, based on a starting viscosity of the storage-stable, isocyanate group-containing formulation.