The characteristics of polyurethane coatings and how to choose environmentally friendly coatings are introduced.

In real life, do you all know what pu paint is? Many friends don't know what it is. It is a natural coating and a special process, but it has a wide range of functions in the family. Next, we will introduce the characteristics of pu coatings, how to choose environmentally friendly coatings, and matters needing attention in the use of coatings. I hope you can refer to it in the process.

I. Introduction to the characteristics of pu paint

1. As we all know, the paint factory used in painting houses is very important, which contains chemical drying and operates in proportion.

2.pu paint has good comprehensive performance; Good hardness, fullness, adhesion, durability and feel. In short, pu paint has many advantages, the film is very thin, not very hard; But its adhesion is particularly good (even teak wood with high oil content can be used, let alone others); Its luster is relatively uniform, and it doesn't look very bright, which can well show the rotation principle and color of the floor.

3. When the coating is used, it has a certain service life after mixing.

4. There are still a lot of paints in life that contain free TDI, which is harmful to human body.

5. So people began to buy pigments. Pu paint is widely used in industry and architecture at present, so it has mature technology and many colors, and can easily meet the requirements of spraying. It is the first choice in life, but it is harmful to human body, so it requires higher requirements for spray booth and spray booth, and at the same time it needs human body protection measures.

2. How to choose environmental protection coatings

1. Choose different types of paints according to the function of the room. When purchasing, choose latex paint according to the function of the room. For example, the metope of bedroom and living room should use latex paint with strong adhesion, fine texture, anti-pulverization and radon prevention. The kitchen and bathroom should use latex paint with waterproof, mildew-proof and easy-to-wash properties; Because balconies are often exposed to the sun and rain, ordinary latex paints are easy to fall off and fade, so professional sunny and rainy paints should be used.

2. Different wall bases need different coating properties. Considering the hiding power and adhesion of the coating itself, different coatings should be selected for different wall bases. For example, concrete and cement base require coatings with good alkali resistance and covering property, and Yichang can be recommended to choose latex paint, scrub-resistant interior wall paint and colorful pattern paint. Don't choose fangci paint for lime and gypsum walls; Non-alkaline coating should be selected for wood base.

Three. Matters needing attention in the use of coatings

1. Crack: In this case, the paint should be removed with a chemical stripper or a hot air spray gun, and then repainted. If the fracture range is not large, then you can use a sand grinding block or dry and wet sandpaper to dip in water and grind off the broken paint surface. After the surface is polished and smooth, apply putty, brush primer and repaint.

2. Wrinkling of paint film: generally, it is caused by brushing for the second time before the first time is dry. At this point, the solvent in the lower paint will affect the upper paint film and make it wrinkle. In this case, the wrinkled paint film can be removed by chemical mercury remover or heating method and repainted. Remember, you must wait for the first paint to dry before painting it again.

3. Paint runs: If the paint is painted too thick at one time, it will run. Brush off the paint before it is dry. If the paint surface has begun to dry, let it dry completely, smooth the paint surface with spun yarn paper, brush the surface clean, then wipe it clean with a wet cloth, and then reapply the outer paint. Be careful not to brush it too thick.

Do you all know what pu paint is? Do you all know? The above article introduces the characteristics of pu paint, how to choose environmentally friendly paint and the matters needing attention in using paint. Bian Xiao didn't make it clear.