High-adhesion water-based metallic paint for vehicles and preparation method of high-adhesion water-based metallic paint

Abstract

The invention is suitable for the technical field of water-based metallic paint, and provides high-adhesion water-based metallic paint for vehicles and a preparation method of the high-adhesion water-based metallic paint. The water-based metallic paint for the vehicle is prepared from the following components in parts by weight: 27 to 36 parts of water-based acrylic emulsion, 3 to 4 parts of epoxy resin, 4.1 to 7.3 parts of composite titanium dioxide, 1.6 to 2.3 parts of zinc phosphate, 3 to 7 parts of dicarboxyl metalloporphyrin, 4.5 to 10.5 parts of tetracarboxyl metal phthalocyanine polymer, 0.3 to 0.9 part of rheological agent and 40 to 60 parts of water. Preferably, the dicarboxyl metalloporphyrin is one or more of dicarboxyl copper porphyrin, dicarboxyl iron porphyrin and dicarboxyl zinc porphyrin; preferably, the tetracarboxyl metal phthalocyanine polymer is prepared by raising the temperature of tetracarboxyl metal phthalocyanine to 350-400 DEG C in a vacuum environment and carrying out gas-phase polymerization reaction. The product prepared by the invention has excellent physical properties, high corrosion inhibition performance, good stability and strong adhesive force, and has wide application prospects.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water-based metal paint, in particular to a high-adhesion water-based metal paint for vehicles and a preparation method thereof. BACKGROUND

[0002] Water-based metal paint is a kind of paint using water as solvent, which has the advantages of environmental protection, low odor and easy cleaning. It is usually used for coating the surface of furniture, doors and windows, vehicles, etc., which can provide metallic luster and has good adhesion and wear resistance.

[0003] Water-based metal paint for vehicles is a kind of water-based metal paint, which needs to meet some specific requirements such as weather resistance, adhesion, wear resistance, color stability, drying property, etc. when choosing and using, in order to ensure its performance and effect.

[0004] The existing water-based metal paint for vehicles has poor adhesion, corrosion resistance and stability, which cannot meet the needs of the developing vehicle industry. SUMMARY

[0005] The present application aims to provide a high-adhesion water-based metal paint for vehicles and a preparation method thereof to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: the present application provides a high-adhesion water-based metal paint for vehicles, the composition and weight fraction of which are as follows:

[0007] Water-based acrylic emulsion 27-36 parts, epoxy resin 3-4 parts, composite titanium dioxide 4.1-7.3 parts, zinc phosphate 1.6-2.3 parts, dicarboxy metal porphyrin 3-7 parts, tetracarboxy metal phthalocyanine polymer 4.5-10.5 parts, rheological agent 0.3-0.9 parts, water 40-60 parts.

[0008] Preferably, the dicarboxy metal porphyrin is one or more of dicarboxy copper porphyrin, dicarboxy iron porphyrin and dicarboxy zinc porphyrin.

[0009] Preferably, the tetracarboxy metal phthalocyanine polymer is obtained by gas-phase polymerization reaction of tetracarboxy metal phthalocyanine under vacuum environment at a temperature of 350-400℃, and the tetracarboxy metal phthalocyanine polymer is one or more of tetracarboxy copper phthalocyanine, tetracarboxy iron phthalocyanine and tetracarboxy zinc phthalocyanine.

[0010] Preferably, the rheological agent is one of silicon dioxide and polyamide wax.

[0011] Preferably, the content ratio of the dicarboxy metal porphyrin to the tetracarboxy metal phthalocyanine polymer is 1:1.5.

[0012] Preferably, the content ratio of the water-based acrylic emulsion to the epoxy resin is 9:1.

[0013] The second aspect of the present application provides a preparation method of the water-based metallic paint for vehicles according to the first aspect of the present application, comprising the following steps:

[0014] The water-based acrylic emulsion, the epoxy resin, the composite titanium white powder, the zinc phosphate, the dicarboxy metal porphyrin, the tetracarboxy metal phthalocyanine polymer, the rheological agent and the water are weighed according to the proportions, and then are added into a high-speed mixer, stirred at 600 r / min to 800 r / min for 15 min to 20 min, so as to obtain the water-based metallic paint for vehicles.

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

[0016] The water-based metallic paint for vehicles with high adhesion and the preparation method thereof provided by the present application have the components of water-based acrylic emulsion, epoxy resin, composite titanium white powder, zinc phosphate, dicarboxy metal porphyrin, tetracarboxy metal phthalocyanine polymer, rheological agent and water, and the prepared product has superior physical properties, high corrosion inhibition performance, good stability and strong adhesion, and has a wide application prospect. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0018] Embodiment 1

[0019] The water-based metallic paint for vehicles with high adhesion has the following components and weight fractions:

[0020] The water-based acrylic emulsion is 27 parts, the epoxy resin is 3 parts, the composite titanium white powder is 4.1 parts, the zinc phosphate is 1.6 parts, the dicarboxy metal porphyrin is 3 parts, the tetracarboxy metal phthalocyanine polymer is 4.5 parts, the rheological agent is 0.3 parts, and the water is 40 parts.

[0021] The dicarboxy metal porphyrin is dicarboxy copper porphyrin, and the structural formula is as follows:

[0022]

[0023] The tetracarboxy metal phthalocyanine polymer is obtained by gas phase polymerization reaction of tetracarboxy metal phthalocyanine under vacuum environment at 350℃, and the tetracarboxy metal phthalocyanine polymer is tetracarboxy copper phthalocyanine. The structural formula of the polymer obtained from the tetracarboxy copper phthalocyanine is as follows:

[0024]

[0025] wherein the rheological agent is silica.

[0026] wherein the content ratio of dicarboxy metalloporphyrin to tetracarboxy metallophthalocyanine polymer is 1:1.5.

[0027] wherein the content ratio of water-based acrylic emulsion to epoxy resin is 9:1.

[0028] The above water-based metallic paint for vehicles comprises the following steps:

[0029] The water-based acrylic emulsion, epoxy resin, composite titanium white, zinc phosphate, dicarboxy copper porphyrin, tetracarboxy copper phthalocyanine polymer, rheological agent, and water are weighed according to the proportions, and then added to a high-speed mixer, stirred at 600 r / min for 20 min to obtain the water-based metallic paint for vehicles.

[0030] Example 2

[0031] A water-based metallic paint for vehicles with high adhesion, wherein the components and their proportions are as follows:

[0032] Water-based acrylic emulsion 31.5 parts, epoxy resin 3.5 parts, composite titanium white 6.2 parts, zinc phosphate 1.9 parts, dicarboxy metalloporphyrin 4 parts, tetracarboxy metallophthalocyanine polymer 6 parts, rheological agent 0.6 parts, and water 50 parts.

[0033] wherein the dicarboxy metalloporphyrin is dicarboxy iron porphyrin, and its structural formula is as follows:

[0034]

[0035] wherein the tetracarboxy metallophthalocyanine polymer is obtained by gas-phase polymerization reaction of tetracarboxy metallophthalocyanine at 380℃ under vacuum, and the tetracarboxy metallophthalocyanine polymer is tetracarboxy iron phthalocyanine, and the structural formula of the polymer obtained from tetracarboxy iron phthalocyanine is as follows:

[0036]

[0037] wherein the rheological agent is polyamide wax.

[0038] wherein the content ratio of dicarboxy metalloporphyrin to tetracarboxy metallophthalocyanine polymer is 1:1.5.

[0039] wherein the content ratio of water-based acrylic emulsion to epoxy resin is 9:1.

[0040] The above water-based metallic paint for vehicles comprises the following steps:

[0041] The water-based acrylic emulsion, epoxy resin, composite titanium white powder, zinc phosphate, dicarboxy zinc porphyrin, tetracarboxy zinc phthalocyanine polymer, rheological agent, and water are sequentially weighed in proportion, and then added to a high-speed mixer, stirred at 700 r / min for 18 min to prepare the water-based metallic paint for vehicles.

[0042] Example 3

[0043] A water-based metallic paint for vehicles with high adhesion, the components and weight fractions are as follows:

[0044] The water-based acrylic emulsion 36 parts, epoxy resin 4 parts, composite titanium white powder 7.3 parts, zinc phosphate 2.3 parts, dicarboxy metal porphyrin 7 parts, tetracarboxy metal phthalocyanine polymer 10.5 parts, rheological agent 0.9 parts, and water 60 parts.

[0045] The dicarboxy metal porphyrin is dicarboxy zinc porphyrin, and its structural formula is as follows:

[0046]

[0047]

[0048] The tetracarboxy metal phthalocyanine polymer is obtained by gas-phase polymerization reaction of tetracarboxy metal phthalocyanine at 400°C under vacuum environment, and the tetracarboxy metal phthalocyanine polymer is tetracarboxy zinc phthalocyanine. The structural formula of the polymer obtained from tetracarboxy zinc phthalocyanine is as follows:

[0049]

[0050] The rheological agent is silicon dioxide.

[0051] The content ratio of the dicarboxy metal porphyrin to the tetracarboxy metal phthalocyanine polymer is 1:1.5.

[0052] The content ratio of the water-based acrylic emulsion to the epoxy resin is 9:1.

[0053] The above water-based metallic paint for vehicles includes the following steps:

[0054] The water-based acrylic emulsion, epoxy resin, composite titanium white powder, zinc phosphate, dicarboxy iron porphyrin, tetracarboxy iron phthalocyanine polymer, rheological agent, and water are sequentially weighed in proportion, and then added to a high-speed mixer, stirred at 800 r / min for 15 min to prepare the water-based metallic paint for vehicles.

[0055] The products prepared in the above examples are tested, and the results are shown in the following table:

[0056]

[0057]

[0058] The present application improves the corrosion inhibition effect of the water-based metal paint by adding the porphyrin and phthalocyanine compounds. As shown in "Inhibition Effect of Porphyrin on Electrochemical Modification Layer on Pure Iron Surface" (Corrosion Science and Protection Technology, Li Weiming, Song Shizhe), porphyrin has corrosion inhibition effect, and phthalocyanine is a compound with similar planar structure as porphyrin, and has similar performance. The tetracarboxy metal phthalocyanine polymer prepared by the present application has a network structure, which can improve the stability and adhesion of the material. In addition, the introduction of zinc phosphate can further improve the corrosion inhibition effect of the water-based metal paint, and the introduction of composite titanium white can significantly improve the strength and other physical properties of the water-based metal paint.

[0059] The above shows and describes the basic principles, main features and advantages of the present application. It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0060] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-adhesion water-based metallic paint for vehicles, characterized in that: The components and weight proportions of the automotive water-based metallic paint are as follows: 27-36 parts of water-based acrylic emulsion, 3-4 parts of epoxy resin, 4.1-7.3 parts of composite titanium dioxide, 1.6-2.3 parts of zinc phosphate, 3-7 parts of dicarboxyl metal porphyrin, 4.5-10.5 parts of tetracarboxyl metal phthalocyanine polymer, 0.3-0.9 parts of rheological agent, and 40-60 parts of water.

2. The high-adhesion water-based metallic paint for vehicles according to claim 1, characterized in that: The dicarboxylic metal porphyrin is one or more of dicarboxylic copper porphyrin, dicarboxylic iron porphyrin and dicarboxylic zinc porphyrin.

3. The high-adhesion water-based metallic paint for vehicles according to claim 1, characterized in that: The tetracarboxyl metal phthalocyanine polymer is prepared by gas phase polymerization of tetracarboxyl metal phthalocyanine at a temperature of 350-400° C. under a vacuum environment. The tetracarboxyl metal phthalocyanine polymer is one or more of tetracarboxyl copper phthalocyanine, tetracarboxyl iron phthalocyanine and tetracarboxyl zinc phthalocyanine.

4. The high-adhesion water-based metallic paint for vehicles according to claim 1, characterized in that: The rheological agent is one of silicon dioxide and polyamide wax.

5. The high-adhesion water-based metallic paint for vehicles according to claim 1, characterized in that: The content ratio of the dicarboxyl metal porphyrin to the tetracarboxyl metal phthalocyanine polymer is 1:1.

5.

6. The high-adhesion water-based metallic paint for vehicles according to claim 1, characterized in that: The content ratio of the water-based acrylic emulsion to the epoxy resin is 9:

1.

7. The method for preparing a water-based metallic paint for a vehicle according to any one of claims 1 to 6, characterized in that: The following steps are involved: The water-based acrylic emulsion, epoxy resin, composite titanium dioxide, zinc phosphate, dicarboxyl metal porphyrin, tetracarboxyl metal phthalocyanine polymer, rheological agent and water are weighed in sequence according to proportion, and then added into a high-speed mixer, and stirred at 600 rpm to 800 rpm for 15 to 20 minutes to prepare a water-based metallic paint for automobiles.

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