CN113429817A - Three-in-one inorganic anticorrosive paint for primary coating, middle coating and top coating - Google Patents

Abstract

The invention discloses a bottom coating, middle coating and top coating three-in-one inorganic anticorrosive paint, which comprises 20-40 parts of lithium silicate, 10-20 parts of silica sol, 1-10 parts of pigment, 15-20 parts of titanium dioxide, 20-40 parts of quartz powder, 5-20 parts of barite, 5-10 parts of zinc oxide, 1-5 parts of rare earth, 0.1-0.5 part of flatting agent, 0.1-0.3 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.1-0.2 part of defoaming agent and 15-20 parts of curing agent. The invention is formed by optimizing the formula, the formula is designed by adopting inorganic materials, the rust removal requirement on the base material is low when the invention is used, the construction requirement can be met only by manually polishing the St2 grade for rust removal, the construction has no requirement on the environment humidity, and the construction condition is wide.

Description

Three-in-one inorganic anticorrosive paint for primary coating, middle coating and top coating

Technical Field

The invention belongs to the technical field of chemical coatings, relates to an anticorrosive coating, and particularly relates to a bottom-coating, middle-coating and top-coating three-in-one inorganic anticorrosive coating.

Background

Corrosion resistant coatings often consist of three parts: the first layer is a primer coated on the surface of the metal and used for enhancing the bonding force between the metal and the coating; the second layer is a filler coating to increase the thickness of the coating. Common materials comprise coal tar enamel, petroleum pitch, epoxy resin, polyolefin coating and the like, and the latter two are more used abroad in recent years; the third layer is a top coating which is used for keeping certain chroma and brightness and keeping the color consistency, luster and beauty of the surface.

The three-layer coating can cause high cost of coating materials and high construction cost, and is easy to generate layering among primary coating, middle coating and top coating, thereby influencing the integrity of the coating and causing unsatisfactory anticorrosion effect. The number of layers also means the number of coating times, the labor cost is very high, the existing three-layer coating technology has very high requirements on metal surface rust removal, environment humidity and coating interval, the on-site construction anticorrosion effect is not good, and the on-site anticorrosion requirement is difficult to meet.

Because the traditional anticorrosive paint is an organic material, the traditional anticorrosive paint is difficult to resist the damage of ultraviolet rays and air oxidation. The coating is thus easily damaged, leading to discoloration, cracking, and a short service life. The service life of field construction is generally one to four years.

Disclosure of Invention

The invention aims to provide a three-in-one inorganic anticorrosive paint which has low cost and performance superior to that of an organic paint.

The above object of the present invention is achieved by the following scheme:

the three-in-one inorganic anticorrosive paint for prime coat, middle coat and top coat is prepared from the following raw materials in parts by weight:

20-40 parts of lithium silicate, 10-20 parts of silica sol, 1-10 parts of pigment, 15-20 parts of titanium dioxide, 20-40 parts of quartz powder, 5-20 parts of barite, 5-10 parts of zinc oxide, 1-5 parts of rare earth, 0.1-0.5 part of flatting agent, 0.1-0.3 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.1-0.2 part of defoaming agent and 15-20 parts of curing agent.

Further, the coating is preferably composed of the following raw materials in parts by weight:

30 parts of lithium silicate, 15 parts of silica sol, 1-10 parts of pigment, 15-20 parts of titanium dioxide, 30 parts of quartz powder, 15 parts of barite, 5-10 parts of zinc oxide, 1-5 parts of rare earth, 0.1-0.5 part of flatting agent, 0.1-0.3 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.1-0.2 part of defoaming agent and 15-20 parts of curing agent.

The coating is further preferably composed of the following raw materials in parts by weight:

30 parts of lithium silicate, 15 parts of silica sol, 5 parts of pigment, 15 parts of titanium dioxide, 30 parts of quartz powder, 15 parts of barite, 7 parts of zinc oxide, 3 parts of rare earth, 0.3 part of leveling agent, 0.2 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.1 part of defoaming agent and 17 parts of curing agent.

Compared with the prior art, the invention has the beneficial effects that:

the invention is formed by optimizing the formula, the formula is designed by adopting inorganic materials, the film forming liquid is silica sol and silicate, the pigment and filler are inorganic substances, the solvent is electrolytic water, and the curing agent is inorganic salt. The whole system is an inorganic system, does not contain any organic film-forming liquid and does not contain any organic solvent. Contains no volatile matter and no heavy metal. The coating is safe, environment-friendly, low-carbon, ultraviolet-resistant, antioxidant, acid-resistant, alkali-resistant, high-temperature-resistant and fireproof, and the fire-proof grade reaches A level. The coating system has strong adhesive force, high hardness and rust conversion function on the base material rust through the boiling effect of the inorganic salt and the metal base material rust. The rust removal requirement on the base material is low, and the construction requirement can be met only by manually polishing and removing the rust by St2 grade. Because the coating is a water-based coating, the construction has no requirement on the environmental humidity, and the construction conditions are wide.

Compared with the traditional coating, the coating has the following advantages:

1. the coating adopts an all-inorganic design system, and is essentially different from the currently used organic coating. Has the advantages of environmental protection, low carbon, no volatile component, no heavy metal and water as solvent.

2. The coating is an inorganic design system and is inorganic after being cured. Has the advantages of ultraviolet resistance, oxidation resistance, acid resistance, alkali resistance, high temperature resistance and no color change.

3. Long service life and permanent coating property (the design life is more than or equal to twenty-five years).

4. The paint and the metal base material rust are subjected to a boiling reaction, and the paint has strong adhesive force, high hardness and super-strong weather resistance.

5. The three functions of the traditional primary coating, the middle coating and the surface coating are completely replaced, the three-in-one coating of the primary coating, the middle coating and the surface coating is realized, the perfect combination of a coating system is realized, and the layering among different coatings is avoided.

6. The coating has the function of rust conversion, has low rust removal requirement, and only needs St2 grade requirement.

7. The coating is fire-retardant, and has no fire-proof requirement on construction sites.

Detailed Description

For the purpose of facilitating an understanding of the present invention, the present invention will now be described by way of examples. It should be understood by those skilled in the art that the examples are only for the purpose of facilitating understanding of the present invention and should not be construed as specifically limiting the present invention.

Unless otherwise specified, various starting materials of the present invention are commercially available; or prepared according to conventional methods in the art. Unless defined or indicated otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention.

Example 1

The formula is as follows:

30 parts of lithium silicate, 15 parts of silica sol, 5 parts of pigment, 15 parts of titanium dioxide, 30 parts of quartz powder, 15 parts of barite, 7 parts of zinc oxide, 3 parts of rare earth, 0.3 part of leveling agent, 0.2 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.1 part of defoaming agent and 17 parts of curing agent.

Prepared according to the conventional method in the industry.

The performance of the three-in-one coating prepared by the embodiment is compared with that of an organic water-based coating, and test item results show that the inorganic three-in-one coating meets or exceeds the test standard requirements in the aspects of ultraviolet resistance, water resistance, hardness, adhesive force and salt mist resistance, and is obviously superior to the organic water-based coating; but also is superior to the organic water-based paint in the aspects of construction cost, diversity and convenience.

Example 2

The formula is as follows:

30 parts of lithium silicate, 20 parts of silica sol, 4 parts of pigment, 15 parts of titanium dioxide, 30 parts of quartz powder, 15 parts of barite, 8 parts of zinc oxide, 5 parts of rare earth, 0.2 part of leveling agent, 0.3 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.2 part of defoaming agent and 18 parts of curing agent.

Prepared according to the conventional method in the industry.

The inorganic three-in-one coating prepared by the embodiment is compared with the oily organic coating in performance, and the test item result shows that the inorganic three-in-one coating has low requirement on the surface treatment grade of St2 of a base material. The hardness, adhesion, oxidation resistance and the like of the coating meet or exceed the requirements of test standards, and are obviously superior to organic oily coatings; but also is superior to the organic oil-based paint in the aspects of construction cost, diversity and convenience.

Example 3

The formula is as follows:

20-40 parts of lithium silicate, 10-20 parts of silica sol, 1-10 parts of pigment, 15-20 parts of titanium dioxide, 20-40 parts of quartz powder, 5-20 parts of barite, 5-10 parts of zinc oxide, 1-5 parts of rare earth, 0.1-0.5 part of flatting agent, 0.1-0.3 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.1-0.2 part of defoaming agent and 15-20 parts of curing agent.

Prepared according to the conventional method in the industry.

The applicant states that on the basis of the above-mentioned examples, the specific content point values of the components in the above-mentioned examples are combined with the technical solutions in the summary of the invention, so as to generate a new numerical range, which is also one of the described ranges of the present invention, and the present application does not list these numerical ranges again for the sake of brevity.

Claims (3)

1. The three-in-one inorganic anticorrosive paint for prime coat, middle coat and top coat is characterized by comprising the following raw materials in parts by weight:

20-40 parts of lithium silicate, 10-20 parts of silica sol, 1-10 parts of pigment, 15-20 parts of titanium dioxide, 20-40 parts of quartz powder, 5-20 parts of barite, 5-10 parts of zinc oxide, 1-5 parts of rare earth, 0.1-0.5 part of flatting agent, 0.1-0.3 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.1-0.2 part of defoaming agent and 15-20 parts of curing agent.

2. The bottom-coating, middle-coating and top-coating three-in-one inorganic anticorrosive coating as claimed in claim 1, which is prepared from the following raw materials in parts by weight:

30 parts of lithium silicate, 15 parts of silica sol, 1-10 parts of pigment, 15-20 parts of titanium dioxide, 30 parts of quartz powder, 15 parts of barite, 5-10 parts of zinc oxide, 1-5 parts of rare earth, 0.1-0.5 part of flatting agent, 0.1-0.3 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.1-0.2 part of defoaming agent and 15-20 parts of curing agent.

3. The bottom-coating, middle-coating and top-coating three-in-one inorganic anticorrosive coating as claimed in claim 1, which is prepared from the following raw materials in parts by weight:

30 parts of lithium silicate, 15 parts of silica sol, 5 parts of pigment, 15 parts of titanium dioxide, 30 parts of quartz powder, 15 parts of barite, 7 parts of zinc oxide, 3 parts of rare earth, 0.3 part of leveling agent, 0.2 part of dispersing agent, 0.1-0.2 part of wetting agent, 0.1 part of defoaming agent and 17 parts of curing agent.