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Yuan Lei's Little Knowledge | Application Effects of Different Mineral Powder Materials in Coatings

Release time:

2024-06-04 14:59

Yuan Lei's Little Knowledge | Application Effects of Different Mineral Powder Materials in Coatings

In architectural coatings, commonly used mineral materials include barium sulfate, calcium carbonate, kaolin, mica powder, talc powder, quartz powder, silica micro powder, transparent powder, glass powder, wollastonite powder, etc. Reasonable application of various mineral materials can effectively improve or enhance the performance of coatings. Let's take a look at the application of different mineral materials in coatings.

1 Barium sulfate

Barium sulfate (barite powder) has strong chemical inertness, good stability, acid and alkali resistance, moderate hardness, high specific gravity, high whiteness, and can absorb harmful rays. It is widely used in various coatings.

There are two forms of barium sulfate as a pigment in architectural coatings: barite powder prepared from natural mineral barite as raw material and precipitated barium sulfate produced by chemical methods. The chemical inertness of barium sulfate makes it suitable for certain coatings that require application under high acidic conditions.

2 Calcium carbonate

Calcium carbonate plays a filling role in the framework and substrate of the paint film, enhancing the deposition and permeability of the paint film. Especially used in metal anti rust primers, it forms hydrogen bonds with the metal surface, increases its paint film adhesion, and can absorb hydrogen ions to prevent the corrosion tendency of metal forming micro batteries. Calcium carbonate has good weather resistance, wear resistance, pH stabilization effect, and can improve corrosion resistance and rheological properties of coatings.

3 Kaolin soil

Kaolin is one of the functional mineral materials used in coatings, and the use of titanium dioxide can improve the comprehensive effect of coatings.

Before calcination, the structure of kaolin is dense, but after calcination, the product structure becomes loose. Due to loose structure and increased porosity. Causing a decrease in density, resulting in an increase in its light scattering coefficient. At the same time, the light refraction at the air particle interface increases opacity, and the light reflection at the interface increases its whiteness. Therefore, calcined kaolin has excellent optical properties.

4 Mica powder

Mica powder contains several minerals with different compositions and properties, among which muscovite powder is one of the commonly used mineral materials in architectural coatings.

The mica powder prepared from natural mica as raw material has a high aspect ratio and good lubrication. The mica flakes are arranged in parallel in the coating, which can improve the mechanical properties of the coating and prevent cracking; Increasing the length of the path through which water or moisture must penetrate the coating film, and the strong UV resistance of mica flakes, effectively protects the C-A, C-C, C-H and other chemical bonds of the resin in the coating, thereby playing an anti-aging role.

5 Talc powder

Talcum powder is one of the traditional mineral materials used in architectural coatings, with crystals in the form of pseudo hexagonal or rhombic flakes, usually forming dense aggregates of blocks, leaves, radiation, and fibers.

Due to the layered crystalline structure of talc, it has a tendency to easily split into scales and special lubricity. Talcum powder can endow architectural coatings with a "lubricating" property, suitable for sandable sealing primers.

6 Silicon Micropowder

In the coating industry, the particle size, whiteness, hardness, suspension, dispersibility, low oil absorption rate, and high electrical resistivity of silicon micro powder can all improve the corrosion resistance, wear resistance, insulation, and high temperature resistance of coatings. Silicon micro powder has always played an important role in coating fillers due to its good stability.

7 Transparent powder

The main function of transparent powder in coatings is to improve the transparency and brightness of the coating. Due to its excellent reflective properties, transparent powder can reflect light more evenly and completely, making the coating more transparent, transparent, and bright, thereby improving the visual effect of the coating. The particles of transparent powder are small and can fill the tiny pores in the coating, increasing the density of the coating, thereby improving the hardness and scratch resistance of the coating. Transparent powder can also adjust the glossiness of coatings and improve the fluidity of coatings.

Transparent powder is suitable for various types of coatings, especially in areas where it is necessary to improve coating transparency and brightness, increase hardness and scratch resistance, adjust glossiness and fluidity, and has a wide range of application prospects. At present, transparent powder has been applied in multiple fields such as home decoration coatings, automotive topcoats, electrical coatings, and architectural coatings.

8 Glass powder

Glass powder is mainly used as a crystal primer in the production of high-end furniture. It is also widely used as a dual-purpose bottom paint for decoration. Scope of application: Polyester paint, polyurethane paint, nitro paint, alkyd paint, acrylic paint, vinyl paint, etc., PE transparent primer, etc.

1. In furniture paint, its transparency, thixotropy, hardness, and wear resistance are all very good. It is recommended to add 3-7% and 5-10% of the color paint.

2. Suitable for plastic paint and metal paint, recommended dosage is 10-15%.

3. Glass powder is mainly used in coatings as a crystal primer in the production of high-end furniture, and is also widely used as a dual-purpose paint for the bottom surface of decoration. Suggest adding a proportion of 5% -10%

9 Wollastonite powder

Wollastonite powder is used in latex paint, which can make the color tone of the latex paint bright. Its needle like structure has anti cracking properties, which helps to improve the wear resistance and durability of the paint film, enhance the hardness of the paint film, and improve the leveling of the coating. Because the oil absorption of wollastonite powder is low, the filling volume is high, and the consumption of bonding materials (such as polymer lotion) is reduced, the cost of coating is greatly reduced.

In exterior wall latex paint, due to the reinforcement, surface smoothness, and good glossiness of silica fume powder, combined with its good hardness and wear resistance, the coating can achieve better mechanical strength, durability, and corrosion resistance.

Barium sulfate,Calcium carbonate,Kaolin soil,Mica powder,Talc powder

Yuan Lei's Little Knowledge | Application Effects of Different Mineral Powder Materials in Coatings

2024-06-04


In architectural coatings, commonly used mineral materials include barium sulfate, calcium carbonate, kaolin, mica powder, talc powder, quartz powder, silica micro powder, transparent powder, glass powder, wollastonite powder, etc. Reasonable application of various mineral materials can effectively improve or enhance the performance of coatings. Let's take a look at the application of different mineral materials in coatings.

Yuan Lei's Little Knowledge | Characteristics of Mineral Materials

2024-05-21


Mineral materials refer to the material products obtained by processing and transforming natural minerals (mainly non-metallic minerals) or rocks as the main raw materials, or minerals or rocks that can be directly used as materials and aim to utilize their main physical and chemical properties. This meaning mainly includes the following four aspects: first, natural minerals and rocks that can be directly utilized or processed to be utilized; Secondly, finished or semi-finished materials made mainly from natural non-metallic minerals and rocks through physical and chemical reactions; Thirdly, artificially synthesized minerals or rocks; Fourthly, the direct utilization targets of these materials are mainly their own physical or chemical properties, not limited to individual chemical elements.

Yuan Lei's Little Knowledge |What kind of calcium carbonate does the plastic industry need?

2024-05-15


Compared with other non-metallic mineral powder materials, calcium carbonate has significant advantages: (1) Cheap prices; (2) Good color and easy coloring; (3) The hardness is low, with a Mohs hardness of 3, so the filling plastic has less wear on the equipment components and molds it comes into contact with; (4) Good thermal and chemical stability; (5) Easy to dry, without crystalline water, adsorbed moisture can be easily removed by heating; (6) Non toxic, non irritating, and tasteless.