CN115975490A - Environment-friendly polyurethane water-based paint and preparation method thereof - Google Patents
Environment-friendly polyurethane water-based paint and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an environment-friendly polyurethane water-based paint and a preparation method thereof, and relates to the technical field of coatings and preparation thereof, wherein the polyurethane water-based paint comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent. The polyurethane water-based paint prepared by the formula and the preparation method provided by the invention has ultralow VOCs (less than or equal to 60 g/L), and the high sag resistance is obtained by adopting two specific thixotropic agents and matching with two specific dispersing agents and flatting agents, and the ultrahigh sag resistance is obtained by adjusting the proportional relation of the three agents, so that the product has the characteristics of high sag resistance, low VOCs and ultra-quick drying.
Description
Technical Field
The invention relates to the technical field of coatings and preparation thereof, and particularly relates to an environment-friendly polyurethane water-based paint and a preparation method thereof.
Background
Polyurethane coatings are a relatively common class of coatings, with waterborne polyurethane paints being one of the most common.
The water-based two-component polyurethane coating combines the high performance of a two-component solvent type polyurethane coating with the low VOC content of a water-based coating, and becomes a research hotspot of the coating industry. The water-based double-component polyurethane coating consists of water-based polyol containing-OH groups and a low-viscosity polyisocyanate curing agent containing-NCO groups, and the performance of the coating film is mainly determined by the composition and the structure of hydroxyl resin. The single-component waterborne polyurethane coating is a coating which takes waterborne polyurethane resin as a base material and water as a dispersion medium. The waterborne polyurethane coating modified by crosslinking has good storage stability, coating mechanical property, water resistance, solvent resistance and aging resistance, and the performance of the waterborne polyurethane coating is similar to that of the traditional solvent type polyurethane coating, so that the waterborne polyurethane coating is an important development direction of the waterborne polyurethane coating. The photocuring waterborne polyurethane coating adopts high-intensity radiation of electron beam radiation and ultraviolet radiation to initiate a low-activity prepolymer system to generate crosslinking curing, and the ultraviolet curing mode is mainly adopted. Firstly, preparing a prepolymer by using unsaturated polyester polyol, then introducing particle genes by using a conventional method, carrying out hydrophilic treatment to prepare polyurethane aqueous dispersion with double bonds on a main chain, and mixing the polyurethane aqueous dispersion with easily soluble high-activity alkoxy triacrylate monomers, a photosensitizer and other auxiliaries to obtain the photocuring waterborne polyurethane coating. However, the problems of high VOCs, environmental pollution, low sagging resistance, slow drying and the like of the existing polyurethane water-based paint generally exist.
Disclosure of Invention
In order to solve the problems, the invention provides a novel environment-friendly polyurethane water-based paint, which realizes the effects of ultralow VOCs (volatile organic compounds), high sag resistance and ultra-fast drying by optimizing a formula, and the specific scheme is as follows:
the invention provides an environment-friendly polyurethane water-based paint which comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
Preferably, the environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 40-60 parts of aqueous polyurethane dispersoid, 25-37 parts of titanium dioxide, 0.3-0.8 part of dispersant, 0.3-0.4 part of flatting agent, 0.1-0.2 part of defoaming agent, 2-4 parts of filler, 0.2-0.3 part of wetting agent, 0.7-1.1 part of solvent-free polyurethane thickener, 0.2-0.5 part of thixotropic agent and 5-10 parts of deionized water; the component B comprises a curing agent; when used, the ratio of the component A to the component B is (6-10): 1.
Preferably, the thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
Preferably, in the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whiskers is 1 (2.7-2.8).
Preferably, the dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
Preferably, the proportion relation between Ecodis P30 and BYK-190 dispersant in the dispersant is (3-7): 1.
Preferably, the leveling agent comprises a mixture of a silicone leveling agent and hydroxyethyl cellulose.
Preferably, in the leveling agent, the proportion relation between the organosilicon leveling agent and the hydroxyethyl cellulose is (10-13): 1.
Preferably, the defoamer comprises a polyether modified siloxane type defoamer.
Preferably, the filler comprises one or both of calcium carbonate or glass frit.
Preferably, the wetting agent comprises a BYK-346 wetting agent.
Preferably, the curing agent includes an aziridine compound.
Preferably, the aziridine compound includes one or more of CX-100, XAMA2, and XAMA 7.
The invention also provides a preparation method of the environment-friendly polyurethane water-based paint, which comprises the following steps: putting the aqueous polyurethane dispersoid, titanium dioxide, a dispersing agent and deionized water into a stirrer, adding a leveling agent, a defoaming agent, a filling material and a wetting agent in the stirring process, finally adding a solvent-free polyurethane thickener and a thixotropic agent, continuously stirring until the viscosity meets the requirement, and stopping stirring to obtain the component A.
Advantageous effects
The invention has the beneficial effects that:
the polyurethane water-based paint prepared by the formula and the preparation method provided by the invention has ultralow VOCs (less than or equal to 60 g/L), and the high sag resistance is obtained by adopting two specific thixotropic agents matched with specific dispersing agents and leveling agents, and the ultrahigh sag resistance is obtained by adjusting the content of the components, so that the product has the characteristics of high sag resistance, low VOCs and ultrahigh quick drying.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
The following examples and comparative examples are parallel runs, with the same processing steps and parameters, unless otherwise indicated.
The preparation steps of the water-based paint in the embodiment of the invention and the comparative example are carried out according to the following steps:
putting the aqueous polyurethane dispersoid, titanium dioxide, a dispersing agent and deionized water into a stirrer, adding a leveling agent, a defoaming agent, a filling material and a wetting agent in the stirring process, finally adding a solvent-free polyurethane thickener and a thixotropic agent, continuously stirring until the viscosity meets the requirement, and stopping stirring to obtain the component A. When one or more of the above components are not included in the formula, the component is directly removed, and the adding sequence and the preparation steps of other components are not changed.
Example 1 an environmentally friendly aqueous polyurethane paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises aqueous polyurethane dispersoid, titanium dioxide, dispersant, flatting agent, defoamer, filler, wetting agent, solvent-free polyurethane thickener, thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersants, the proportion relation between Ecodis P30 and BYK-190 dispersant is 3.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is 10.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Example 2 an environmentally friendly polyurethane water-based paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersants, the proportion relationship between Ecodis P30 and BYK-190 dispersant is 7.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is 13.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Example 3 an environmentally friendly aqueous polyurethane paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersants, the proportion relationship between Ecodis P30 and BYK-190 dispersant is 5.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is 12.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Example 4 an environmentally friendly aqueous polyurethane paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of hydrogenated castor oil to anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersants, the proportion relationship between Ecodis P30 and BYK-190 dispersant is 5.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is 12.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Example 5 an environmentally friendly aqueous polyurethane paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersing agent, the proportion relation between Ecodis P30 and BYK-190 is 5.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is 12.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Example 6 an environmentally friendly aqueous polyurethane paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises aqueous polyurethane dispersoid, titanium dioxide, dispersant, flatting agent, defoamer, filler, wetting agent, solvent-free polyurethane thickener, thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersants, the proportion relation between Ecodis P30 and BYK-190 dispersant is 2.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is 12.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Example 7 an environmentally friendly aqueous polyurethane paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersants, the proportion relation between Ecodis P30 and BYK-190 dispersant is 8.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is 12.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Example 8 an environmentally friendly polyurethane waterborne paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersing agent, the proportion relation between Ecodis P30 and BYK-190 is 5.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is 9.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Example 9 an environmentally friendly aqueous polyurethane paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersing agent, the proportion relation between Ecodis P30 and BYK-190 is 5.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organosilicon leveling agent and the hydroxyethyl cellulose is 14.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Comparative example 1 a polyurethane water-based paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises anhydrous calcium sulfate whiskers.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersing agent, the proportion relation between Ecodis P30 and BYK-190 is 5.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is 12.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Comparative example 2 a polyurethane water-based paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises hydrogenated castor oil.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersing agent, the proportion relation between Ecodis P30 and BYK-190 is 5.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation of the organic silicon leveling agent and the hydroxyethyl cellulose is 12.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Comparative example 3 a polyurethane water-based paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant includes a BYK-190 dispersant.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is 12.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Comparative example 4 a polyurethane water-based paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a sodium polyacrylate dispersant Ecodis P30.
The leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
In the leveling agent, the proportion relation of the organic silicon leveling agent and the hydroxyethyl cellulose is 12.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Comparative example 5 a polyurethane water-based paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersants, the proportion relationship between Ecodis P30 and BYK-190 dispersant is 5.
The leveling agent comprises hydroxyethyl cellulose.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
Comparative example 6 a polyurethane water-based paint:
comprises a component A and a component B, wherein the component A comprises: the paint comprises aqueous polyurethane dispersoid, titanium dioxide, dispersant, flatting agent, defoamer, filler, wetting agent, solvent-free polyurethane thickener, thixotropic agent and deionized water; the component B comprises a curing agent.
The environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 50 parts of aqueous polyurethane dispersoid, 30 parts of titanium dioxide, 0.5 part of dispersing agent, 0.3 part of flatting agent, 0.1 part of defoaming agent, 3 parts of filler, 0.2 part of wetting agent, 0.9 part of solvent-free polyurethane thickener, 0.4 part of thixotropic agent and 7 parts of deionized water; the component B comprises a curing agent; when used, the ratio of component a to component B is 8.
The thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
In the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1.
The dispersant comprises a mixture of a sodium polyacrylate dispersant Ecodis P30 and a BYK-190 dispersant.
In the dispersing agent, the proportion relation between Ecodis P30 and BYK-190 is 5.
The leveling agent comprises an organic silicon leveling agent.
The defoamer comprises a polyether modified siloxane type defoamer.
The filler comprises calcium carbonate.
The wetting agent includes a BYK-346 wetting agent.
The curing agent includes an aziridine compound.
The aziridine compound includes CX-100.
And (3) detecting the performance of the obtained product:
the basic performance of the aqueous paint obtained in all the examples and the comparative examples is detected according to a test method of GB/T19250-2013, wherein all the parameters obtained by detecting the product of the example 3 are shown in a table 1, and the parameters obtained by partially detecting the products of other examples and the comparative examples are shown in a table 2; the anti-sagging performance of the aqueous paint obtained in all the examples and comparative examples is tested according to the test method of GB/T9264-2012, and the results are shown in Table 2.
TABLE 1 EXAMPLE 3 basic Performance index parameters for Water-based paints
Table 2 examples comparative example product parameters
From the above results, it is understood that the combination of the thixotropic agent, the leveling agent and the dispersing agent provided by the present invention can greatly improve the comprehensive performance of the polyurethane water-based paint. Moreover, in the combination and proportion, the effect is greatly reduced by removing any one component or changing the proportion relation of the components.
While the preferred embodiments and examples of the present invention have been described in detail, the present invention is not limited to the embodiments and examples, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. An environment-friendly polyurethane water-based paint is characterized in that: comprises a component A and a component B, wherein the component A comprises: the paint comprises an aqueous polyurethane dispersion, titanium dioxide, a dispersing agent, a leveling agent, a defoaming agent, a filler, a wetting agent, a solvent-free polyurethane thickener, a thixotropic agent and deionized water; the component B comprises a curing agent.
2. The environment-friendly polyurethane water-based paint according to claim 1, characterized in that: the environment-friendly polyurethane water-based paint comprises the following components in parts by mass: the component A comprises: 40-60 parts of aqueous polyurethane dispersoid, 25-37 parts of titanium dioxide, 0.3-0.8 part of dispersant, 0.3-0.4 part of flatting agent, 0.1-0.2 part of defoaming agent, 2-4 parts of filler, 0.2-0.3 part of wetting agent, 0.7-1.1 part of solvent-free polyurethane thickener, 0.2-0.5 part of thixotropic agent and 5-10 parts of deionized water; the component B comprises a curing agent; when used, the ratio of the component A to the component B is (6-10): 1.
3. The environment-friendly polyurethane water-based paint according to claim 1, characterized in that: the thixotropic agent comprises a mixture of hydrogenated castor oil and anhydrous calcium sulfate whiskers.
4. The environmentally friendly polyurethane waterborne paint of claim 3, wherein: in the thixotropic agent, the mass ratio of the hydrogenated castor oil to the anhydrous calcium sulfate whisker is 1 (2.7-2.8).
5. The environment-friendly polyurethane water-based paint according to claim 1, characterized in that: the dispersant comprises a mixture of a sodium polyacrylate dispersant EcodisP30 and a BYK-190 dispersant.
6. The environmentally friendly polyurethane waterborne paint of claim 5, wherein: in the dispersant, the proportion relation between EcodisP30 and BYK-190 dispersant is (3-7): 1.
7. The environmentally friendly polyurethane water-based paint according to claim 1, characterized in that: the leveling agent comprises a mixture of an organic silicon leveling agent and hydroxyethyl cellulose.
8. The environmentally friendly polyurethane waterborne paint of claim 7, wherein: in the leveling agent, the proportion relation between the organic silicon leveling agent and the hydroxyethyl cellulose is (10-13): 1.
9. The environment-friendly polyurethane water-based paint according to claim 1, characterized in that: the defoamer comprises a polyether modified siloxane type defoamer; the filler comprises one or two of calcium carbonate or glass powder.
10. The method for preparing an environment-friendly polyurethane water-based paint according to any one of claims 1 to 9, characterized in that: the method comprises the following steps: putting the aqueous polyurethane dispersion, titanium dioxide, a dispersing agent and deionized water into a stirrer, adding a leveling agent, a defoaming agent, a filler and a wetting agent in the stirring process, finally adding a solvent-free polyurethane thickener and a thixotropic agent, continuously stirring until the viscosity meets the requirement, and stopping stirring to obtain the component A.
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| WO2015197644A1 (en) * | 2014-06-24 | 2015-12-30 | Byk-Chemie Gmbh | Polyurethane two-component or multi-component systems having a latent thickening tendency |
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| CN107779085A (en) * | 2017-11-21 | 2018-03-09 | 厦门信果石墨烯科技有限公司 | A kind of graphene water-based electric heating coating and preparation method thereof |
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