Water-based paint is green, energy-saving, safe and convenient, and has developed rapidly in countries around the world. As a purely environmentally friendly product diluted with water, water-based paint has the characteristics of lower formaldehyde and lower aromatic hydrocarbons than traditional solvent-based paints. It is a new generation of high-tech sunrise products. Many people do not understand water-based paint and cannot get rid of the misunderstanding of solvent-based paint, thinking that water-based paint is inferior to solvent-based paint. In fact, the water added to water-based paint has a diluting effect without dissolving the film-forming substances. Solvent-based paint forms a film by drying, which is a parallel film. Water-based paint forms a polymer film, which is a thick-grained film. The latter is the real high-end film. Paint film is a high-tech product.
1. What is water-based paint?
Water-based paint is a paint that uses water diluent and does not contain organic solvents. It does not contain toxic benzene, toluene, xylene, formaldehyde, and free TDI. Heavy metal, non-toxic and non-irritating odor, harmless to human body, does not pollute the environment, the paint film is plump, crystal clear, good flexibility and has the characteristics of water resistance, wear resistance, aging resistance, yellowing resistance, fast drying, easy to use, etc. Any paint that uses water as a solvent or dispersion medium can be called water-based paint. Water-based paint includes three types: water-soluble, water-diluted, and water-dispersed (latex paint).
1. Water-soluble type: The water-soluble type uses water-soluble resin as a film-forming substance, represented by polyvinyl alcohol and its various modifications. In addition, there are water-soluble alkyd resin, water-soluble Epoxy resin and inorganic polymer water-based resin, etc.
2. Water-diluted type: Water-diluted type refers to a paint prepared with post-emulsified emulsion as a film-forming substance, so that the solvent-based resin is dissolved in an organic solvent, and then with the help of an emulsifier, it is sprayed by strong mechanical force. Stirring causes the resin to disperse in water to form an emulsion, which is called a post-emulsified emulsion. The resulting paint can be diluted with water during construction.
3. Water-dispersed paint: Water-dispersed paint mainly refers to paint formulated with synthetic resin emulsion as a film-forming substance. Emulsion refers to a dispersion emulsion composed of small particle clusters dispersed in water from unsaturated vinyl monomers polymerized under certain temperature conditions in the presence of an emulsifier and during mechanical stirring. Paint prepared by adding a little emulsion to water-soluble resin cannot be called latex paint. Strictly speaking, water-thinned paint cannot be called latex paint, but it is customary to classify it as latex paint.
2. The difference between water-based paint and traditional paint:
1. Water-based paint uses a variety of polymer resins as base materials, water as the dispersion medium, and special additives are added to make organic matter ( Filler pigments) and emulsion resin form a network structure; traditional paints use vegetable oil and synthetic resin as the main film-forming substances, supplemented by various auxiliaries and pigments. There are fifteen series and several varieties. When using, toluene, dioxins must be added Dilute with toluene and other organic solvents.
2. Water-based paint films are divided into matte, glossy, and high-gloss. They are resistant to alkali, acid, weather, salt, and water. They are flame retardant, have fast drying times, and cover a large area. , has good anti-rust and anti-corrosion properties, has rust and anti-rust effects, combines well with various paints, and does not react in any way; the traditional paint film is bright and hard, water-resistant, weather-resistant, chemical-resistant, and electrically insulating, but the paint has good The film is highly brittle and takes a long time to dry. Low-grade paint films are prone to yellowing. Different paints should not be combined with each other due to their different properties.
3. Water-based paint is widely used on surfaces such as wood, metal, ships, cement, automobiles, etc., and is especially suitable for anti-corrosion and anti-rust of pipelines and equipment. Traditional paint is suitable for different occasions and applications based on different characteristics. environment.
4. The adhesion of water-based paint is higher than that of ordinary paint, and can reach level 1-2; the adhesion of traditional paint is level 2-3.
5. The surface drying time of water-based paint is 20 minutes and the actual drying time is 15 hours; the surface drying time of traditional paint is 2 hours and the actual drying time is more than 30 hours.