High-gloss water-based acrylic polyurethane finish paint and preparation method thereof

Abstract

The invention is suitable for the technical field of chemical production and manufacturing, and provides a high-gloss water-based acrylic polyurethane finish paint and a preparation method thereof, and the high-gloss water-based acrylic polyurethane finish paint comprises the following components by mass: 40-70% of a water-based hydroxy acrylic dispersion; 0.1-1% of a water-based dispersant; 10-30% of a pigment; 5-20% of a graphene aqueous slurry; 5-20% of a filler; 0.1%-0.5% of a water-based bactericide; 0.1%-0.5% of a water-based defoaming agent; 0.1%-0.5% of a water-based base material wetting agent; 0.5-2% of a water-based corrosion inhibitor; 0.1 to 1.5 percent of a water-based thickening agent; 5-20% of deionized water; and 10-30% of a water-based polyisocyanate curing agent. The product obtained by the invention has the characteristics of high glossiness, water resistance, excellent rust resistance and the like, solves the problems of poor water resistance, short construction time limit, poor glossiness and the like of the traditional water-based acrylic polyurethane finish paint, enlarges the application range, improves the construction efficiency, enlarges the application range, and can better meet the requirements of customers.

Description

Technical Field

[0001] The invention relates to the technical field of chemical production and manufacturing, in particular to a high-gloss water-based acrylic polyurethane topcoat and a preparation method thereof. Background Art

[0002] With the improvement of environmental protection laws and standards for coatings and coatings, as well as the control of coating pollution, the development of water-based paint technology and the promotion and application of products have been greatly promoted. Two-component water-based acrylic polyurethane coatings have low VOC emissions during construction, meet environmental protection standards, have excellent mechanical properties of the paint film, and have excellent gloss and color retention. They are being widely accepted by the market and their application areas are constantly expanding. However, water-based acrylic polyurethane coatings have disadvantages such as poor water resistance and a short construction time limit after the curing agent is prepared.

[0003] Graphene is a sp 2 A new material in which hybrid connected carbon atoms are tightly stacked into a single-layer two-dimensional honeycomb lattice structure. Graphene has excellent optical, electrical, and mechanical properties, and has important application prospects in materials science, micro-nano processing, energy, biomedicine, and drug delivery. In view of the excellent performance of graphene materials and their potential application value, a series of important progress has been made in many disciplines such as chemistry, materials, physics, biology, environment, and energy.

[0004] The present invention combines graphene with a conventional anti-corrosion coating system to improve the performance of the anti-corrosion coating. Summary of the invention

[0005] The present invention aims to provide a high-gloss water-based acrylic polyurethane topcoat and a preparation method thereof, so as to solve the problems in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: In a first aspect, the present invention provides a high-gloss water-based acrylic polyurethane topcoat, wherein the components and contents thereof are as follows in terms of mass percentage:

[0007] Aqueous hydroxy acrylic dispersion 40-70%; aqueous dispersant 0.1-1%; pigment 10-30%; graphene aqueous slurry 5-20%; filler 5-20%; aqueous fungicide 0.1-0.5%; aqueous defoamer 0.1-0.5%; aqueous substrate wetting agent 0.1-0.5%; aqueous corrosion inhibitor 0.5-2%; aqueous thickener 0.1-1.5%; deionized water 5-20%; aqueous polyisocyanate curing agent 10-30%.

[0008] Preferably, the aqueous dispersant is an aqueous polymer dispersant or a non-ionic aqueous dispersant, and the aqueous fungicide is a methylisothiazolinone fungicide.

[0009] Preferably, the aqueous defoaming agent is an organosilicon defoaming agent, and the aqueous substrate wetting agent is an organosilicon substrate wetting agent.

[0010] Preferably, the aqueous corrosion inhibitor is an organic zinc chelate, and the aqueous thickener is one or more of an associative alkali swelling thickener HASE and a polyurethane thickener HEUR.

[0011] The second aspect of the present invention provides a method for preparing the high gloss waterborne acrylic polyurethane topcoat according to the first aspect of the present invention, comprising the following steps:

[0012] S1, stir the formulated amount of deionized water, aqueous dispersant, pigment and filler in a mixing tank at high speed;

[0013] S2, sand-grinding the uniformly stirred base material to a fineness of less than 20 microns, and placing it in a paint mixing tank;

[0014] S3, add water-based hydroxy acrylic dispersion, graphene water-based slurry, water-based defoamer, water-based substrate wetting agent, water-based bactericide, water-based corrosion inhibitor, deionized water into the paint mixing tank, stir evenly, adjust the viscosity with water-based thickener, filter and package after passing the test.

[0015] The present invention has at least the following beneficial effects:

[0016] The invention provides a high-gloss water-based acrylic polyurethane topcoat and a preparation method thereof. The obtained product has the characteristics of high gloss, water resistance, excellent anti-rust performance and the like, solves the problems of poor water resistance, short construction time and poor gloss of traditional water-based acrylic polyurethane topcoats, expands the application range, improves construction efficiency, expands the application range, and can better meet customer needs. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention provides a high-gloss water-based acrylic polyurethane topcoat, wherein the components and contents thereof are as follows in terms of mass percentage:

[0019] Aqueous hydroxy acrylic dispersion 40-70%; aqueous dispersant 0.1-1%; pigment 10-30%; graphene aqueous slurry 5-20%; filler 5-20%; aqueous fungicide 0.1-0.5%; aqueous defoamer 0.1-0.5%; aqueous substrate wetting agent 0.1-0.5%; aqueous corrosion inhibitor 0.5-2%; aqueous thickener 0.1-1.5%; deionized water 5-20%; aqueous polyisocyanate curing agent 10-30%.

[0020] Among them, the water-based dispersant adopts a water-based polymer dispersant or a non-ionic water-based dispersant; the water-based fungicide adopts a methylisothiazolinone fungicide with low toxicity and high efficiency; the water-based defoamer adopts a silicone defoamer, and the water-based substrate wetting agent adopts a silicone substrate wetting agent; the water-based corrosion inhibitor adopts an organic zinc chelate; the water-based thickener adopts one or more of an associative alkali swelling thickener (HASE) and a polyurethane thickener (HEUR).

[0021] Compared with the related art, the present invention firstly adopts the screened water-based hydroxyl acrylic dispersion to not only significantly improve the water resistance of the water-based acrylic polyurethane coating, but also improves the gloss; secondly, the construction time limit of the water-based acrylic polyurethane topcoat is improved by the screened water-based polyisocyanate curing agent; in addition, the addition of graphene water-based slurry greatly improves the anti-corrosion performance of the water-based acrylic polyurethane paint, expands the application range, improves the construction efficiency, and meets the needs of customers.

[0022] Based on the above technical solution, the present invention provides the following partial embodiments:

[0023] Example 1

[0024] A high gloss water-based acrylic polyurethane topcoat, the components and contents of which are as follows in percentage by mass:

[0025] 60% aqueous hydroxy acrylic dispersion; 0.6% aqueous dispersant; 12% rutile titanium dioxide; 0.2% carbon black; 5% aqueous graphene slurry; 1250 mesh barium sulfate 10%; 0.2% aqueous fungicide; 0.1% aqueous defoamer; 0.2% aqueous substrate wetting agent; 1% aqueous corrosion inhibitor; 0.8% aqueous thickener; 9.9% deionized water.

[0026] The preparation method of the above high gloss waterborne acrylic polyurethane topcoat is as follows:

[0027] S1, mixing the formulated amount of deionized water, aqueous dispersant, rutile titanium dioxide, carbon black, and 1250 mesh barium sulfate in a mixing tank at high speed;

[0028] S2, sand-grinding the uniformly stirred base material to a fineness of less than 20 microns, and placing it in a paint mixing tank;

[0029] S3, add water-based hydroxy acrylic dispersion, graphene water-based slurry, water-based defoamer, water-based substrate wetting agent, water-based bactericide, water-based corrosion inhibitor, deionized water into the paint mixing tank, stir evenly, adjust the viscosity with water-based thickener, filter and package after passing the test.

[0030] The product prepared in Example 1 was tested for related properties, and the results are shown in the following table:

[0031]

[0032] In summary, the high-gloss water-based acrylic polyurethane topcoat prepared by the present invention has the characteristics of high gloss, water resistance, excellent anti-rust performance, etc., which solves the problems of poor water resistance, short construction time, poor gloss, etc. of traditional water-based acrylic polyurethane topcoats, expands the scope of application, improves construction efficiency, expands the scope of application, and can better meet customer needs.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high gloss water-based acrylic polyurethane topcoat, characterized in that: In terms of mass percentage, the components and contents are as follows: Aqueous hydroxy acrylic dispersion 40-70%; aqueous dispersant 0.1-1%; pigment 10-30%; graphene aqueous slurry 5-20%; filler 5-20%; aqueous fungicide 0.1-0.5%; aqueous defoamer 0.1-0.5%; aqueous substrate wetting agent 0.1-0.5%; aqueous corrosion inhibitor 0.5-2%; aqueous thickener 0.1-1.5%; deionized water 5-20%; aqueous polyisocyanate curing agent 10-30%.

2. A high gloss waterborne acrylic polyurethane topcoat according to claim 1, characterized in that: The aqueous dispersant is an aqueous polymer dispersant or a non-ionic aqueous dispersant, and the aqueous fungicide is a methylisothiazolinone fungicide.

3. The high gloss waterborne acrylic polyurethane topcoat according to claim 1, characterized in that: The water-based defoaming agent is an organosilicon-based defoaming agent, and the water-based substrate wetting agent is an organosilicon-based substrate wetting agent.

4. The high gloss waterborne acrylic polyurethane topcoat according to claim 1, characterized in that: The water-based corrosion inhibitor is an organic zinc chelate, and the water-based thickener is one or more of an associative alkali swelling thickener HASE and a polyurethane thickener HEUR.

5. The method for preparing the high gloss waterborne acrylic polyurethane topcoat according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1, stir the formulated amount of deionized water, aqueous dispersant, pigment and filler in a mixing tank at high speed; S2, sand-grinding the uniformly stirred base material to a fineness of less than 20 microns, and placing it in a paint mixing tank; S3, add water-based hydroxy acrylic dispersion, graphene water-based slurry, water-based defoamer, water-based substrate wetting agent, water-based bactericide, water-based corrosion inhibitor, deionized water into the paint mixing tank, stir evenly, adjust the viscosity with water-based thickener, filter and package after passing the test.

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