Paint components, performance, characteristics, application

one. Film-forming resin properties, characteristics, applications

1. Film-forming resin is also called base resin. Its function is to combine the pigment, filler and resin to form a uniform and dense coating film on the substrate. After curing, the coating is formed. It is the foundation of the coating and determines the coating. Adhesion to the substrate, physical, chemical and mechanical properties of the coating.

2. The best adhesion of the film-forming resin is achieved by its chemical structure, surface tension and solubility parameters (that is, the compatibility of the solvent and the resin in the coating) with the polymer resin that is close to the substrate.

two. Coloring pigments performance, characteristics, application

1. Pigments are solid powders that are insoluble in water and insoluble in oil and have a specific color, color pigments, and extender pigments (ie, fillers).

2. Coloring pigments: give the coating hiding power and enhance the mechanical and physical properties, mainly play a role in coloring and hiding;

3. Coloring power: When a certain kind of pigment is mixed with other pigments in the base material, it can show the ability of other colors of the pigment itself not to affect the color of the paint.

4. Covering power: Because of the effect of pigments, the minimum amount used to cover the surface of the object to be covered is good or bad, depending on the difference between the refractive index of the pigment and the oil, the bigger the better.

The so-called pigment light resistance and weather resistance, the pigment will change in varying degrees under light and atmospheric effects

5. Three primary colors:

Red, yellow, blue, three colors are the most basic colors, also called the first color, they can not be decomposed and mixed with the raw materials of color paint, while the preparation of the coating is commonly used mainly red, yellow, blue, white, black five colors mother.

three. Filler performance, characteristics, application

1. Filler is filled with pigment (also called extender pigment)

2. It is a powdery substance without hiding power and tinting power. It is mainly chemical resistant, weather resistant, and wear resistant grain is good, neutral, improving the rheological properties of the coating, sealing performance, temperature resistance, mechanical properties, construction Performance and can greatly reduce the cost of paint.

four. Solvent performance, characteristics, application

1. Solvents are volatile organic liquids, as long as the two coatings are similar in properties, both solvents are universal

2. The main role of the solvent is to dissolve or disperse the film-forming resin into a uniform and stable liquid dispersion system, to reduce the viscosity of the coating, to facilitate the preparation of the coating, to form the coating, and to completely evaporate without any residue during the formation of the coating film. It is important. Index has solvency and volatility.

3. The other major role of the solvent is to dissolve or swell the substrate. It is best not to dissolve the substrate and only to exert the swelling effect. In particular, do not dissolve and migrate additives such as plasticizers in the plastic to form the surface of the substrate.

4. Acrylic paint solvent used by ketones, esters, alcohols, ether solvents mixed.

The role of ketones: True solvent, acetone, low boiling point, fast evaporation, easy to absorb water, easy to white, but strong dissolving power,

Cyclohexanone, high boiling point, non-volatile, anti-white

Ester function: True solvent, strong dissolving power to the resin, strong eroding to the substrate.

Alcohol Action: Assisting Solvents, Easing Etching of Substrates

Ether Action: Solvents are used to promote leveling and reduce substrate etch

5. The solvent combination includes the proper combination of the true solvent of the resin, co-solvent, and diluent (poor solvent used to adjust the leveling property of the coating, drying speed, and cost reduction) to achieve the best solubility, volatilization rate, and price. balance

Fives. The performance, characteristics, application of additives

To adjust and improve the overall performance of coatings and coatings, wetting agents and dispersants are mainly used in the formulation and production process of paints, and others such as anti-floating agents and anti-sagging agents.