阅读说明：本技术 一种船底防锈涂料用颜料的制备方法及颜料、涂料 (Preparation method of pigment for ship bottom antirust coating, pigment and coating ) 是由 刘俊 刘源 刘新霞 张廉正 刘新中 贺长启 于 2019-11-04 设计创作，主要内容包括：本发明属于防腐涂料技术领域,公开了一种船底防锈涂料用颜料的制备方法,包括高岭石破碎、煅烧、酸液溶出、压滤、滤饼干燥磨粉等步骤；还公开了一种颜料和一种涂料。本申请的有益效果为：颜料具有好的耐盐水和耐盐雾性、耐候性、附着力强、防沉淀、不含任何有害重金属,利用各种环保防锈涂料的开发。涂料应用范围广,主要用于船底防锈涂料；还可以用于船舶、公路、铁路、高压线钢架管线、石油化工厂的设备、管道、及其他户外钢结构设施。具有适用范围光、无毒性、耐腐蚀性强的特点。(The invention belongs to the technical field of anticorrosive coatings, and discloses a preparation method of a pigment for ship bottom antirust coatings, which comprises the steps of kaolinite crushing, calcining, acid liquor dissolving out, filter pressing, filter cake drying and grinding and the like; a pigment and a coating are also disclosed. The beneficial effect of this application does: the pigment has good salt water resistance and salt spray resistance, weather resistance, strong adhesive force, precipitation resistance and no harmful heavy metal, and utilizes the development of various environment-friendly antirust coatings. The coating has wide application range and is mainly used as ship bottom antirust coating; the composite material can also be used for ships, roads, railways, high-voltage line steel frame pipelines, equipment and pipelines of petrochemical plants and other outdoor steel structure facilities. Has the characteristics of wide application range, no toxicity and strong corrosion resistance.)

1. A preparation method of a pigment for ship bottom antirust paint is characterized by comprising the following steps: the method comprises the following steps:

step one, crushing and grinding phyllosilicate ores to obtain powder;

step two, heating the powder in the step one to 650 ℃ and keeping the temperature constant for 1 hour to obtain a calcined material;

step three, adding the calcined material obtained in the step two into acid liquor for dissolving out;

step four, performing filter pressing on the product obtained in the step three to obtain a filter cake;

and step five, drying and grinding the filter cake to obtain the pigment.

2. The method for producing a pigment for a ship bottom anticorrosive paint according to claim 1, characterized in that: in the first step, the granularity of the powder is 100 meshes.

3. The method for producing a pigment for a ship bottom anticorrosive paint according to claim 1, characterized in that: in the third step, the acid solution is hydrochloric acid with the mass concentration of 10-20%, and the liquid-solid ratio of the hydrochloric acid to the calcined material is 4; the reaction temperature was 90 ℃ and stirred for 1 hour.

4. The method for producing a pigment for a ship bottom anticorrosive paint according to claim 1, characterized in that: and in the fourth step, washing the filter cake, wherein the washing end point is that the PH of the filter cake washing liquid is neutral.

5. The method for producing a pigment for a ship bottom anticorrosive paint according to claim 1, characterized in that: in the fifth step, the drying temperature is 105 ℃, and the ground powder granularity is 600 meshes.

6. A pigment produced by the method for producing a pigment for a ship bottom anticorrosive paint according to any one of claims 1 to 5.

7. A coating comprising pigments characterized by: the pigment is a pigment produced by the method for producing a pigment for a ship bottom anticorrosive paint according to any one of claims 1 to 5.

Technical Field

The invention relates to the technical field of anticorrosive materials, in particular to a preparation method of a pigment for ship bottom antirust paint, and also relates to a pigment prepared by the preparation method of the pigment for ship bottom antirust paint and a paint prepared by using the pigment.

Background

The coating of the ship is one of three major processes of shipbuilding, and occupies a higher and higher position in the modern shipbuilding and shipbuilding production, and most ships are used in the severe corrosive environment of the ocean, such as the ocean atmosphere, the splashing of seawater, the soaking of seawater, high-temperature and humid environments and the like, so that the coating of the ship has extremely high requirements on the corrosion resistance and the rust resistance. In addition, the coating site of the ship is generally in the environment with large humidity and temperature change, such as near the river, in the harbor and the like, the construction interval is long, and the requirement time for the protection period of the coating is longer.

Three process principles of the prior ship antirust coating capable of resisting seawater corrosion are as follows: firstly, a cathodic protection principle is adopted, a constant potential rectifier and other devices are mainly arranged on a ship, so that a protective current is formed on the surface layer of the ship, and the working principle is not to improve the corrosion resistance and the rust resistance of the coating; secondly, passivating pigments such as lead series, zinc series, chromium series and the like are adopted to manufacture the coating, so that a passivating film is formed on the surface of the ship, and the corrosion resistance and the rust resistance of the ship are improved; thirdly, forming a shielding paint film by utilizing the paint with small ion permeability, mainly adding an active agent into flake mineral pigments such as aluminum powder, mica iron oxide, mica powder and the like, and combining the activated pigments with paint resin to form an antirust paint; for example, in the existing glass flake-shaped antirust paint, tens of layers of shielding structures are arranged in parallel from top to bottom in a paint film, so that corrosive media are permeated and diffused in the paint film through a complex and tortuous path, and the permeation time is prolonged; this principle is the current mainstream of research, but there is no suitable activator and pigment, and it is uncertain whether the activator reacts additionally with the resin, thereby degrading the performance of the finished coating.

The most important anticorrosive and antirust film-forming substance in the paint is pigment, and the pigment has the performances of enhancing the durability, weather resistance, wear resistance, corrosion resistance and the like of a coating film, so that the pigment which is green and environment-friendly and has good anticorrosive and corrosion resistant performances is urgently needed at present.

Disclosure of Invention

In order to overcome the defects, the invention provides a preparation method of a pigment for a ship bottom antirust coating.

In order to overcome the defects, the invention also provides a pigment for the ship bottom antirust coating.

In order to overcome the defects, the invention also provides a ship bottom antirust coating.

In order to achieve the purpose, the technical scheme of the invention is as follows: a preparation method of a pigment for ship bottom antirust paint comprises the following steps:

step one, crushing and grinding phyllosilicate ores to obtain powder; the phyllosilicate mineral in the present application means a clay mineral mainly composed of kaolinite;

step two, heating the powder in the step one to 650 ℃ and keeping the temperature constant for 1 hour to obtain a calcined material;

step three, adding the calcined material obtained in the step two into acid liquor for dissolving out;

step four, performing filter pressing on the product obtained in the step three to obtain a filter cake;

and step five, drying and grinding the filter cake to obtain the pigment.

Preferably, in the first step, the powder has a particle size of 100 meshes.

Preferably, in the third step, the concentration of the hydrochloric acid is 10% -20%, and the liquid-solid ratio of the hydrochloric acid to the calcined material is 4; the reaction temperature was 90 ℃ and stirred for 1 hour.

Preferably, in the fourth step, the filter cake is washed, and the washing end point is that the PH of the filter cake washing liquid is neutral.

Preferably, in the fifth step, the drying temperature is 105 ℃, and the ground particle size is 600 meshes.

The application also provides a pigment prepared by the preparation method of the pigment for the ship bottom antirust paint.

The application also provides a paint which comprises the pigment, and the pigment is prepared by the preparation method of the pigment for the ship bottom antirust paint.

The principle of the invention is as follows: the kaolinite comprises the following main components: al (Al)₂O₃·2SiO₂·2H₂O, an aqueous silicate mineral of a layered structure; under the condition of heating at 650 ℃ and keeping the constant temperature for 1 hour, crystal water is firstly lost to be converted into metakaolin, but a sheet structure is still kept, and at the temperature, the kaolinite is not converted into a mullite structure;

then, dissolving out part of easily dissolved metal ions in the metakaolin by acid liquor to cause the structure of part of metakaolin to be damaged; metakaolinite which does not completely destroy the structure and still maintains a layered structure, and the partial silicate is balanced for the electrovalence so as to generate activity; metakaolin with thoroughly damaged structure, namely the place where all metal ions are dissolved out, forms hydrated silicon dioxide, and the hydroxyl of the hydrated silicon dioxide also has activity; at this time, substances from which the acid solution is dissolved out are mainly composed of: metakaolinite and defective kaolinite are the main components, and a small amount of hydrated silicon dioxide is contained. The substance not only has higher activity, but also has a layered structure, namely a filter cake obtained after filter pressing and washing by a filter press. The filter cake is insoluble after being dissolved out by the hot hydrochloric acid, and the seawater corrosion is mainly caused by chloride ions, so that the filter cake has a seawater corrosion resistance function, namely the pigment has good seawater corrosion resistance.

Utilize the coating of pigment preparation of this application, because pigment has the activity, there is the combination of near-sighted chemical bond between it and the resin to reduce the clearance between the two as far as, block up the route of blockking up corrosive medium infiltration, and the layer structure of this application pigment this application, can multilayer layer structure, further improve anti medium permeability.

The invention has the beneficial effects that: 1. the pigment has activity and can be closely combined with resin to approximate chemical bond bonding, so that the gap between the pigment and the resin is extremely small, a high-seepage-proofing paint film can be formed, the seepage-proofing capability of the paint is better than that of an outer scaly glass paint film, and the paint has extremely high rust-proofing and corrosion-proofing capabilities.

2. The product has strong resistance to the corrosion of chloride ions, forms a paint film with epoxy resin through tests in other fields, has salt spray resistance for over 1000 hours, and is most suitable for being used as anticorrosive paint for ship paint and other facilities contacting with seawater.

3. The pigment has a structure which can change when being preheated, thereby being suitable for being used as flame retardant paint, having good heat resistance when being used as shop primer, reducing burning loss range and having flame retardant function when being used as paint in a cabin.

4. The product does not contain heavy metals such as lead, chromium, mercury, chromium, tin and the like, belongs to an environment-friendly pigment, and does not scatter toxic components in the processes of paint preparation, coating and coated plate processing.

5. The pigment has the functions required by various marine paints (except antifouling paints), and how to select a proper resin can develop a uniform paint variety which can be used for different parts of the coating of the marine.

Drawings

FIG. 1 is a flow chart of a manufacturing process according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific examples.