US 7,932,317 B1Granted

Aqueous coating material and modular system for producing same

AssigneeBASF Coatings GmbH

InventorBernhard Lettmann

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Abstract

An aqueous coating material preparable by mixing with one another (A1) at least one substantially water-free base color comprising (a11) at least one optionally water-soluble or -dispersible binder, (a12) at least one color and/or effect pigment, and (a13) at least one optionally water-miscible organic solvent; (A2) at least one aqueous base color comprising (a21) at least one water-soluble or -dispersible binder, (a22) at least one color pigment, and (a23) water; and (B) at least one aqueous pigment-free mixing varnish comprising (b1) at least one water-soluble or -dispersible binder and (b2) water; and also, if desired, comprising (C) an aqueous medium comprising (c1) a rheology control additive; and also a modular system for preparing aqueous coating materials, comprising (I) at least one substantially water-free color and/or effect module, comprising at least one base color (A1), (II) at least one aqueous color module comprising at least one base color (A2), and (III) at least one aqueous, pigment-free mixing varnish module comprising at least one aqueous, pigment-free mixing varnish (B), and if desired (IV) at least one rheology module.

Claims29

Dependent claims

A process for preparing an aqueous coating material with precisely defined shade and optical effect, comprising mixing modules differing in material composition and function and stored separately from one another shortly before application of the coating material, wherein the modules comprise:

(I) at least one module comprising less than 5% by weight water that provides at least one of color and effect, comprising:
(A1) at least one base color comprising less than 5% by weight water that imparts at least one of color and effect comprising:
(a11) at least one binder, wherein the at least one binder is optionally water-soluble or water-dispersible;
(a12) at least one pigment that imparts at least one of color and effect;
and
(a13) at least one organic solvent, wherein the at least one organic solvent is optionally water-miscible;
and optionally, at least one of:
(a14) at least one crosslinking agent;
(a15) at least one auxiliary;
and
(a16) at least one additive;
(II) at least one aqueous color module, comprising:
(A2) at least one aqueous color-imparting base color, comprising:
(a21) 10 to 80% by weight of at least one water-soluble or water-dispersible binder;
(a22) 1 to 70% by weight of at least one inorganic color pigment or 1 to 30% by weight of at least one organic color pigment, optionally a combination of at least one organic color pigment and at least one inorganic color pigment;
and
(a23) 10 to 89% by weight water when 1 to 30% by weight of at least one organic color pigment is present, or 20 to 89% by weight water when 1 to 70% by weight of at least one inorganic color pigment is present;
and optionally, at least one of:
(a24) at least one organic solvent, wherein the at least one organic solvent is optionally water-miscible;
(a25) at least one crosslinking agent;
(a26) at least one auxiliary;
and
(a27) at least one additive;
and
(III) at least one pigment-free mixing varnish module, comprising:
(B) at least one aqueous, pigment-free mixing varnish, comprising:
(b1) at least one water-soluble or water-dispersible binder;
and
(b2) water;
and optionally, at least one of:
(b3) at least one crosslinking agent;
(b4) at least one auxiliary;
and
(b5) at least one additive;
and optionally:
(IV) at least one pigment-free rheology module, comprising:
(C) an aqueous medium, comprising:
(c1) at least one rheology control additive;
optionally, with the proviso that at least one of the at least one additives (a16), (a27), and (b5) further comprises the at least one rheology control additive (c1).

36 more elements

(I) at least one module comprising less than 5% by weight water that takes on all of the function of effect and part of the function of coloring or serves solely for imparting effect, comprising:
(A1) at least one base color comprising less than 5% by weight water that imparts (i) color and effect or (ii) effect, comprising:
(a11) 10 to 80% by weight of at least one binder, wherein the at least one binder is optionally water-soluble or water-dispersible;
(a12) 0.5 to 70% by weight of at least one pigment that imparts (i) color and effect or (ii) effect;
and
(a13) 10 to 89.5% by weight of at least one organic solvent, wherein the at least one organic solvent is optionally water-miscible;
and optionally, at least one of:
(a14) at least one crosslinking agent;
(a15) at least one auxiliary;
and
(a16) at least one additive;
(II) at least one aqueous color module, comprising:
(A2) at least one aqueous color-imparting base color, comprising:
(a21) 10 to 80% by weight of at least one water-soluble or water-dispersible binder;
(a22) 1 to 70% by weight of at least one inorganic color pigment or 1 to 30% by weight of at least one organic color pigment, optionally a combination of at least one organic color pigment and at least one inorganic color pigment;
and
(a23) 10 to 89% by weight water when 1 to 30% by weight of at least one organic color pigment is present, and 20 to 89% by weight water when 1 to 70% by weight of at least one inorganic color pigment is present;
and optionally, at least one of:
(a24) at least one organic solvent, wherein the at least one organic solvent is optionally water-miscible;
(a25) at least one crosslinking agent;
(a26) at least one auxiliary;
and
(a27) at least one additive;
and
(III) at least one pigment-free mixing varnish module, comprising:
(B) at least one aqueous, pigment-free mixing varnish, comprising:
(b1) at least one water-soluble or water-dispersible binder;
and
(b2) water;
and optionally, at least one of:
(b3) at least one crosslinking agent;
(b4) at least one auxiliary;
and
(b5) at least one additive;
and:
(IV) at least one pigment-free rheology module, comprising:
(C) an aqueous medium, comprising:
(c1) 0.5 to 50% by weight of at least one rheology control additive and 70 to 99.5% by weight of aqueous medium;
optionally, with the proviso that at least one of the at least one additives (a16), (a27), and (b5) further comprise the at least one rheology control additive (c1).

36 more elements

A process for preparing an aqueous basecoat coating material with precisely defined shade and optical effect, for use with a clearcoat applied wet-on-wet to produce a multicoat color, or color and effect, coating system, wherein the process comprises a modular system having mixing modules differing in material composition and function and stored separately from one another shortly before application of the coating material, wherein the module system consists of the following four modules:

(I) at least one module comprising less than 5% by weight water that takes on all of the function of effect and part of the function of coloring, comprising:
(A1) at least one base color comprising less than 5% by weight water that imparts color and effect comprising:
(a11) 10 to 80% by weight of at least one binder, wherein the at least one binder is optionally water-soluble or water-dispersible;
(a12) 0.5 to 70% by weight of effect pigment and color pigment;
and
(a13) 10 to 89.5% by weight of at least one organic solvent, wherein the at least one organic solvent is optionally water-miscible;
and optionally, at least one of:
(a14) at least one crosslinking agent;
(a15) at least one auxiliary;
and
(a16) at least one additive;
(II) at least one aqueous color module, comprising:
(A2) at least one aqueous color-imparting base color, comprising:
(a21) 10 to 80% by weight of at least one water-soluble or water-dispersible binder;
(a22) 1 to 70% by weight of at least one inorganic color pigment or 1 to 30% by weight of at least one organic color pigment, optionally a combination of at least one organic color pigment and at least one inorganic color pigment;
and
(a23) 10 to 89% by weight water when 1 to 30% by weight of at least one organic color pigment is present, and 20 to 89% by weight water when 1 to 30% by weight of at least one organic color pigment is present;
and optionally, at least one of:
(a24) at least one organic solvent, wherein the at least one organic solvent is optionally water-miscible;
(a25) at least one crosslinking agent;
(a26) at least one auxiliary;
and
(a27) at least one additive;
and
(III) at least one pigment-free mixing varnish module, comprising:
(B) at least one aqueous, pigment-free mixing varnish, comprising:
(b1) from 10 to 80% by weight of at least one water-soluble or water-dispersible binder;
and
(b2) from 20 to 90% by weight of water;
and optionally, at least one of:
(b3) at least one crosslinking agent;
(b4) at least one auxiliary;
and
(b5) at least one additive;
and:
(IV) at least one pigment-free rheology module, comprising:
(C) an aqueous medium, comprising:
(c1) 1.5 to 25% by weight of at least one rheology control additive and 75 to 98.5% by weight of aqueous medium;
optionally, with the proviso that at least one of the at least one additives (a16), (a27), and (b5) further comprise the at least one rheology control additive (c1);
wherein the at least one binder (a11), the at least one water-soluble or water-dispersible binder (a21), and the at least one water-soluble or water-dispersible binder (b1) are polyurethane resins, and wherein the binder (a11) in module (A1) is a polyurethane containing carboxylic and/or carboxylate groups and optionally hydroxyl groups having a number-average molecular weight of from 850 to 20,000 and an acid number of 20 to 150 mg KOH/g.

37 more elements

Dependencies are inferred from the claim text.