CN112251085A - Water-based antirust paint applied to high-temperature high-humidity environment - Google Patents

Abstract

The invention discloses a water-based antirust paint applied to a high-temperature high-humidity environment, which consists of the following components in percentage by weight: 8-12% of modified polyacrylate emulsion, 10-15% of light calcium carbonate, 25-32% of styrene-acrylic emulsion, 1-2% of emulsifier, 0.3-0.8% of flatting agent, 0.1-0.2% of foaming agent, 0.3-0.5% of thickening agent, 0.1-0.2% of film-forming assistant, 0.2-0.5% of film-forming catalyst, 0.1-0.3% of wetting agent and the balance of deionized water. According to the invention, the silicon dioxide/fluorine-containing polyacrylate composite emulsion is adopted, so that the anti-aging capability of a paint film can be improved, and the water resistance of the paint film can be effectively improved by the fluorine-containing polymer; the invention also adds a film forming additive and a film forming catalyst, and the mixed catalyst consisting of the nano titanium dioxide and the micron nickel chloride can further improve the compactness of film forming.

Description

Water-based antirust paint applied to high-temperature high-humidity environment

Technical Field

The invention relates to the technical field of antirust paint, in particular to water-based antirust paint applied to a high-temperature high-humidity environment.

Background

Antirust paint is a paint which can protect the metal surface from chemical or electrochemical corrosion of atmosphere, seawater and the like. The antirust paint coated on the metal surface can effectively avoid the direct invasion of various corrosive substances in the atmosphere, so that the service life of the metal is prolonged to the maximum extent. It can be divided into two main categories of physical and chemical antirust paints. The former forms a compact paint film by properly matching the pigment and the paint to prevent corrosive substances such as iron oxide red, wetting agents, graphite antirust paint and the like; the latter depends on the chemical rust inhibiting effect of the rust inhibiting pigment, such as red lead, zinc yellow rust-inhibiting paint, etc. The antirust paint is used for antirust of metals such as bridges, ships, pipelines and the like.

The traditional antirust paint is prepared by compounding phytic acid serving as a metal strong chelating agent as a main component and other aqueous auxiliary agents. The phytate is a natural non-toxic organic chemical product extracted from grain crops, and when the phytate is used as a magnetic material antirust agent, the phytate can be quickly chelated with metal on the surface to form a layer of compact monomolecular complex protective film, so that the corrosion of the metal can be effectively inhibited. The surface of the material treated by the product keeps original color, and can enter the next working procedures of coating and the like without washing.

However, the conventional antirust paint is suitable for environments with the humidity lower than 50% R.H. and the temperature lower than 40 ℃, and has poor antirust effect for special high-temperature and high-humidity environments, so that the invention provides the water-based antirust paint applied to the high-temperature and high-humidity environments.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides a water-based antirust paint applied to a high-temperature and high-humidity environment.

The technical scheme of the invention is as follows:

the water-based antirust paint applied to the high-temperature and high-humidity environment comprises the following components in percentage by weight:

8-12% of modified polyacrylate emulsion

10 to 15 percent of light calcium carbonate

25 to 32 percent of styrene-acrylic emulsion

1 to 2 percent of emulsifier

0.3 to 0.8 percent of flatting agent

0.1 to 0.2 percent of defoaming agent

0.3 to 0.5 percent of thickening agent

0.1 to 0.2 percent of film forming additive

0.2 to 0.5 percent of film forming catalyst

0.1 to 0.3 percent of wetting agent

The balance of deionized water.

Preferably, the modified polyacrylate emulsion is a silicon dioxide/fluorine-containing polyacrylate composite emulsion.

Preferably, the emulsifier is a sorbitan fatty acid ester emulsifier.

Preferably, the film-forming assistant is ethylene glycol phenyl ether.

Preferably, the film-forming catalyst is a mixture of nano titanium dioxide and micron nickel chloride.

Preferably, the particle size of the nano titanium dioxide is 10-30 nm; the grain size of the micron nickel chloride is 20-50 μm.

A preparation method of water-based antirust paint applied to high-temperature and high-humidity environment comprises the following steps:

A. dispersing the modified polyacrylate emulsion, the light calcium carbonate, the styrene-acrylic emulsion, the emulsifier, the leveling agent and the wetting agent in deionized water, stirring at the stirring speed of 400-500rpm for 60-90min, and uniformly dispersing;

B. slowly adding the film forming assistant and the film forming catalyst, and continuously stirring for 90-120 min;

C. adding the defoaming agent and the thickening agent, stirring at the stirring speed of 200-300rpm for 20-30min, and uniformly mixing.

The invention has the advantages that:

the invention relates to a water-based antirust paint applied to a high-temperature high-humidity environment, which comprises the following components in percentage by weight: 8-12% of modified polyacrylate emulsion, 10-15% of light calcium carbonate, 25-32% of styrene-acrylic emulsion, 1-2% of emulsifier, 0.3-0.8% of flatting agent, 0.1-0.2% of foaming agent, 0.3-0.5% of thickening agent, 0.1-0.2% of film-forming assistant, 0.2-0.5% of film-forming catalyst, 0.1-0.3% of wetting agent and the balance of deionized water. According to the invention, the silicon dioxide/fluorine-containing polyacrylate composite emulsion is adopted, so that the anti-aging capability of a paint film can be improved, and the water resistance of the paint film can be effectively improved by the fluorine-containing polymer; the invention also adds a film forming additive and a film forming catalyst, and the mixed catalyst consisting of the nano titanium dioxide and the micron nickel chloride can further improve the compactness of film forming.

Detailed Description

Example 1:

the water-based antirust paint applied to the high-temperature and high-humidity environment comprises the following components in percentage by weight:

modified polyacrylate emulsion 10%

13 percent of light calcium carbonate

28 percent of styrene-acrylic emulsion

1.8 percent of emulsifier

0.5 percent of flatting agent

0.15 percent of defoaming agent

0.35 percent of thickening agent

0.18 percent of film-forming additive

0.35 percent of film forming catalyst

0.22 percent of wetting agent

The balance of deionized water.

The modified polyacrylate emulsion is silicon dioxide/fluorine-containing polyacrylate composite emulsion.

The emulsifier is sorbitan fatty acid ester emulsifier.

The film-forming assistant is ethylene glycol phenyl ether.

The film-forming catalyst is a mixture of nano titanium dioxide and micron nickel chloride. The mass ratio of the nano titanium dioxide to the micron nickel chloride is 1: 25.

the particle size of the nano titanium dioxide is 10-30 nm; the grain size of the micron nickel chloride is 20-50 μm.

A preparation method of water-based antirust paint applied to high-temperature and high-humidity environment comprises the following steps:

A. dispersing modified polyacrylate emulsion, light calcium carbonate, styrene-acrylic emulsion, emulsifier, leveling agent and wetting agent in deionized water, stirring at 450rpm for 70min, and dispersing uniformly;

B. slowly adding the film forming assistant and the film forming catalyst, and continuously stirring for 100 min;

C. adding defoaming agent and thickening agent, stirring at 260rpm for 25min, and mixing.

Example 2:

the water-based antirust paint applied to the high-temperature and high-humidity environment comprises the following components in percentage by weight:

12 percent of modified polyacrylate emulsion

Light calcium carbonate 10%

Styrene-acrylic emulsion 32%

1 percent of emulsifier

0.8 percent of flatting agent

0.1 percent of defoaming agent

0.5 percent of thickening agent

0.1 percent of film-forming additive

0.5 percent of film forming catalyst

0.1 percent of wetting agent

The balance of deionized water.

The modified polyacrylate emulsion is silicon dioxide/fluorine-containing polyacrylate composite emulsion.

The emulsifier is sorbitan fatty acid ester emulsifier.

The film-forming assistant is ethylene glycol phenyl ether.

The film-forming catalyst is a mixture of nano titanium dioxide and micron nickel chloride. The mass ratio of the nano titanium dioxide to the micron nickel chloride is 1: 30.

the particle size of the nano titanium dioxide is 10-30 nm; the grain size of the micron nickel chloride is 20-50 μm.

A preparation method of water-based antirust paint applied to high-temperature and high-humidity environment comprises the following steps:

A. dispersing the modified polyacrylate emulsion, the light calcium carbonate, the styrene-acrylic emulsion, the emulsifier, the leveling agent and the wetting agent in deionized water, stirring at the stirring speed of 400rpm for 90min, and uniformly dispersing;

B. slowly adding the film forming assistant and the film forming catalyst, and continuously stirring for 120 min;

C. adding defoaming agent and thickening agent, stirring at 200rpm for 30min, and mixing.

Example 3:

the water-based antirust paint applied to the high-temperature and high-humidity environment comprises the following components in percentage by weight:

8 percent of modified polyacrylate emulsion

15 percent of light calcium carbonate

Styrene-acrylic emulsion 25%

2 percent of emulsifier

0.3 percent of flatting agent

0.2 percent of defoaming agent

0.3 percent of thickening agent

0.2 percent of film-forming additive

0.2 percent of film forming catalyst

0.3 percent of wetting agent

The balance of deionized water.

The modified polyacrylate emulsion is silicon dioxide/fluorine-containing polyacrylate composite emulsion.

The emulsifier is sorbitan fatty acid ester emulsifier.

The film-forming assistant is ethylene glycol phenyl ether.

The film-forming catalyst is a mixture of nano titanium dioxide and micron nickel chloride. The mass ratio of the nano titanium dioxide to the micron nickel chloride is 1: 15.

the particle size of the nano titanium dioxide is 10-30 nm; the grain size of the micron nickel chloride is 20-50 μm.

A preparation method of water-based antirust paint applied to high-temperature and high-humidity environment comprises the following steps:

A. dispersing modified polyacrylate emulsion, light calcium carbonate, styrene-acrylic emulsion, emulsifier, leveling agent and wetting agent in deionized water, stirring at 500rpm for 60min, and dispersing uniformly;

B. slowly adding the film forming assistant and the film forming catalyst, and continuously stirring for 90 min;

C. adding defoaming agent and thickening agent, stirring at 300rpm for 20min, and mixing.

Comparative example 1

The nano titanium dioxide of the embodiment 1 is removed, and the rest proportion and the preparation method are unchanged.

Comparative example 2

The micron-sized nickel chloride in the embodiment 1 is removed, and the rest proportion and the preparation method are unchanged.

Comparative example 3

The nano titanium dioxide and the micron nickel chloride in the embodiment 1 are removed at the same time, and the rest proportion and the preparation method are unchanged.

The rust inhibitive paint samples of examples 1 to 3 and comparative examples 1 to 3 were coated on an iron plate at a coating thickness of 5mm, and then subjected to a conventional test, the specific test results of which are shown in table 1.

Table 1: the conventional performance test result of the antirust paint;

the coatings were allowed to stand at 100 ℃ and 95% humidity r.h. for 365 days, and physical properties were retested, with the specific test results shown in table 2.

Table 2: the high temperature and high humidity performance test result of the antirust paint;

from the above test data, it can be known that the rust inhibitive paint sample of the present invention has very good rust inhibitive performance even when applied to high temperature and high humidity environment for a long time.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (7)

1. The water-based antirust paint applied to the high-temperature high-humidity environment is characterized by comprising the following components in percentage by weight:

8-12% of modified polyacrylate emulsion

10 to 15 percent of light calcium carbonate

25 to 32 percent of styrene-acrylic emulsion

1 to 2 percent of emulsifier

0.3 to 0.8 percent of flatting agent

0.1 to 0.2 percent of defoaming agent

0.3 to 0.5 percent of thickening agent

0.1 to 0.2 percent of film forming additive

0.2 to 0.5 percent of film forming catalyst

0.1 to 0.3 percent of wetting agent

The balance of deionized water.

2. The aqueous rust inhibitive paint for high temperature and high humidity environment according to claim 1, wherein said modified polyacrylate emulsion is a silica/fluorine-containing polyacrylate composite emulsion.

3. The aqueous rust inhibitive paint for high temperature and high humidity environments of claim 1, wherein said emulsifier is a sorbitan fatty acid ester type emulsifier.

4. The aqueous rust inhibitive paint for high temperature and high humidity environments of claim 1, wherein said film forming aid is ethylene glycol phenyl ether.

5. The aqueous rust inhibitive paint applied to high temperature and high humidity environment according to claim 1, wherein said film forming catalyst is a mixture of nano titanium dioxide and micron nickel chloride.

6. The aqueous rust inhibitive paint for high temperature and high humidity environments of claim 5, wherein the particle size of said nano titanium dioxide is 10 to 30 nm; the grain size of the micron nickel chloride is 20-50 μm.

7. The aqueous rust inhibitive paint for high temperature and high humidity environments according to any one of claims 1 to 6, which is prepared by a process comprising the steps of:

A. dispersing the modified polyacrylate emulsion, the light calcium carbonate, the styrene-acrylic emulsion, the emulsifier, the leveling agent and the wetting agent in deionized water, stirring at the stirring speed of 400-500rpm for 60-90min, and uniformly dispersing;

B. slowly adding the film forming assistant and the film forming catalyst, and continuously stirring for 90-120 min;

C. adding defoaming agent and thickening agent, stirring at 200-300rpm for 20-30min, mixing, and filtering.