Preparation method of water-based industrial paint with good adhesive force and high hardness

Abstract

The invention relates to the technical field of water-based industrial paint, in particular to a preparation method of water-based industrial paint with good adhesive force and high hardness, and the preparation method comprises the following steps: 1, uniformly stirring 2-10 parts by weight of attapulgite, 20-60 parts by weight of acrylic acid, 0.1-0.5 part by weight of bactericide, 60-100 parts by weight of purified water and 0.1-0.5 part by weight of rheological agent, heating at 75-85 DEG C for 5.5-7 hours, and cooling to room temperature to obtain the water-based industrial paint with good adhesive force and high hardness; the water-based acrylic emulsion is produced; 2, 0.1-0.5 part by weight of a flatting agent, 0.1-1 part by weight of a dispersing agent, 0.1-0.5 part by weight of a film-forming agent, 0.1-0.5 part by weight of an elastic agent and 0.1-0.5 part by weight of a thixotropic agent are added and stirred at a high speed for 30 minutes, then 0.5-5 parts by weight of attapulgite and 2-30 parts by weight of the water-based acrylic emulsion are fully and evenly stirred, purified water is added according to the proportion of 10-20%, the mixture is stirred together for 3-4 hours, and the water-based industrial paint is obtained. Compared with the prior art, the water-based industrial paint prepared by the method disclosed by the invention has the advantages of good adhesive force, high hardness, material universality, luster, permeability, plumpness, better solvent resistance and weather resistance.

Description

Technical Field

[0001] The invention relates to the technical field of water-based industrial paints, in particular to a method for preparing a water-based industrial paint with good adhesion and high hardness. Background Art

[0002] Water-based industrial paint mainly uses water as a diluent, and does not require curing agents, thinners, or some solvents. It is a new type of environmentally friendly anti-rust and anti-corrosion paint that is different from oil-based industrial paint. The application range of water-based industrial paint is extremely wide, and it can be seen everywhere in bridges, steel structures, ships, electromechanical, steel, etc. Because it is energy-saving and environmentally friendly, and will not cause harm or pollution to the human body and the environment, it is deeply welcomed by users. It is the future development direction of the coating industry and an alternative product to oil-based paint.

[0003] Existing water-based industrial paints cannot combine good adhesion, high hardness, material versatility, gloss, transparency, fullness, good solvent resistance and weather resistance. Summary of the invention

[0004] The object of the present invention is to provide a method for preparing a water-based industrial paint with good adhesion and high hardness, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for preparing a water-based industrial paint with good adhesion and high hardness comprises the following steps:

[0007] Step 1: Mix 2-10 parts by weight of attapulgite with 20-60 parts of acrylic acid, 0.1-0.5 parts of a fungicide, 60-100 parts of purified water, and 0.1-0.5 parts of a rheological agent, and then heat at 75-85 degrees Celsius for 5.5-7 hours to produce a water-based acrylic emulsion;

[0008] Step 2: Add 0.1-0.5 parts by weight of a leveling agent, 0.1-1 parts of a dispersant, 0.1-0.5 parts of a film-forming agent, 0.1-0.5 parts of an elastic agent, and 0.1-0.5 parts of a thixotropic agent, and stir at high speed for 30 minutes. Then, stir 0.5-5 parts of attapulgite with 2-30 parts of the aqueous acrylic emulsion, add purified water at a ratio of 10-20%, and stir together for 3-4 hours to obtain a water-based industrial paint.

[0009] In the present invention, attapulgite is purified by a high-speed centrifuge.

[0010] Compared with the prior art, the water-based industrial paint prepared by the method of the present invention has good adhesion, high hardness, material versatility, gloss, transparency, fullness, good solvent resistance and weather resistance. DETAILED DESCRIPTION

[0011] The technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0012] Embodiment 1:

[0013] A method for preparing a water-based industrial paint with good adhesion and high hardness comprises the following steps:

[0014] Step 1: 5 parts by weight of attapulgite purified by a high-speed centrifuge are mixed with 25 parts of acrylic acid, 0.2 parts of a fungicide, 90 parts of purified water, and 0.1 parts of a rheological agent, and then heated at 82 degrees Celsius for 6.3 hours to produce a water-based acrylic emulsion;

[0015] Step 2: Add 0.12 parts by weight of leveling agent, 0.15 parts by weight of dispersant, 0.2 parts by weight of film-forming agent, 0.15 parts by weight of elastic agent, and 0.12 parts by weight of thixotropic agent, and stir at high speed for 30 minutes. Then, stir 3 parts of attapulgite with 20 parts of the aqueous acrylic emulsion, and then add purified water at a ratio of 10-20%, and stir together for 3-4 hours to obtain a water-based industrial paint.

[0016] In the present invention, the water-based acrylic emulsion produced in step 1 is prepared separately, and the attapulgite is purified by a high-speed centrifuge, and the effect of 0.2 parts of bactericide and 0.1 parts of rheological agent can be better exerted by heating at 82 degrees Celsius for 6.3 hours (because the raw materials in the second step will not only be diluted after addition, the preparation time will be longer, and the effect is poor), and the attapulgite and acrylic acid are better mixed to prepare the water-based acrylic emulsion. After the water-based acrylic emulsion is prepared in the first step, the leveling agent, dispersant, film-forming agent, elastic agent, and thixotropic agent are first mixed in the second step, and then the attapulgite and water-based acrylic emulsion are added to obtain water-based industrial paint, the whole process time is short, and the preparation effect is better.

[0017] After the water-based industrial paint of the present invention is used and cured, the peeling area is tested to be less than or equal to 5%, the adhesion is good, and the hardness reaches above 4H. It is suitable for occasions requiring high hardness, such as automotive paint and industrial coatings. The material versatility, gloss, transparency, and fullness are observed to be good, and the test shows that it has good solvent resistance and weather resistance.

[0018] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0019] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A method for preparing a water-based industrial paint with good adhesion and high hardness, characterized in that: The following steps are included: Step 1: Mix 2-10 parts by weight of attapulgite with 20-60 parts of acrylic acid, 0.1-0.5 parts of a fungicide, 60-100 parts of purified water, and 0.1-0.5 parts of a rheological agent, and then heat at 75-85 degrees Celsius for 5.5-7 hours to produce a water-based acrylic emulsion; Step 2: Add 0.1-0.5 parts by weight of a leveling agent, 0.1-1 parts of a dispersant, 0.1-0.5 parts of a film-forming agent, 0.1-0.5 parts of an elastic agent, and 0.1-0.5 parts of a thixotropic agent, and stir at high speed for 30 minutes. Then, stir 0.5-5 parts of attapulgite with 2-30 parts of the aqueous acrylic emulsion, add purified water at a ratio of 10-20%, and stir together for 3-4 hours to obtain a water-based industrial paint.

2. The method for preparing a water-based industrial paint with good adhesion and high hardness according to claim 1, characterized in that: Attapulgite is purified by high-speed centrifuge.