What is pu paint? PU paint is the general name of all polyurethane coatings, and its film-forming method is natural film-forming without special process.
Polyurethane coatings have a two-component chemical structure:
Isocyanate group (-NCO) of component A (curing agent)+hydroxyl group (-OH) of component B (coating) = polyurethane.
Polymer (paint film) thinner (Tianna water): it only plays a diluting role in adjusting viscosity and facilitating construction.
Composition: main agent+curing agent+diluent.
Pu paint features:
1: chemical drying and proportional operation.
2. Good comprehensive performance; Good hardness, fullness, adhesion, durability and feel. The paint film is thin and 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. There is a certain service life after matching.
4. High free TDI is harmful to human body.
5.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. However, it is harmful to human body, so the requirements for painting room and painting room are higher, and human body protection measures are needed at the same time.
How about pu paint
superiority
1, and the paint film has strong adhesion. The paint film has excellent adhesion to various surfaces (metal, wood, rubber, concrete and some plastics).
2. It can be made into coatings with various film-forming substances, and can be made into various varieties according to different requirements.
3. Compared with other coatings, PU paint film has the highest elongation at break under the same hardness, so it is widely used in floor paint and deck paint.
4. It is both protective and decorative, and can be used for painting high-grade handicrafts, high-grade wood products, pianos, large passenger planes, etc.
5. The paint film has excellent chemical resistance, acid resistance, alkali resistance, salt resistance and petroleum products, and can be used as maintenance paint for platforms, ships and chemical plants, as well as the inner wall lining of petroleum storage tanks.
6. It can be dried and cured at low temperature. The construction season is long.
disadvantaged
It is harmful to human body and has poor environmental protection performance. Therefore, the developed countries in Europe have basically been eliminated, and the current domestic utilization rate has also been greatly reduced.
The difference between pu paint and uv paint
Essence: There is not much difference in name between the two, but the essence of pu paint and uv paint is different. Pu paint is polyurethane paint, and uv paint is generally epoxy resin.
Paint film: pu paint film is thin and not very hard, while uv paint film has high hardness and adhesion is not as good as PU paint.
Usage: The biggest similarity between pu paint and uv paint is that they are also widely used in modern home decoration with good gloss.
Price: From the current domestic building materials market, we can know that the current uv paint is relatively reasonable, and the price of pu paint is generally higher than the same UV paint.