Coating knowledge entry series classification articles

Paint, customarily we call it paint. It is a necessary dish in the decoration. Whether it is high-level decoration, or ordinary decoration, will be more or less related to the paint. In this section, we will discuss the type of paint and some precautions. Of course, because there are so many types of paint, we only discuss the part that belongs to the decoration. First, the use of the coating of paint applied to the object, its purpose is to protect the first surface, the second use is modification. In terms of wood products, due to the porous structure on the surface of wood products, it is not resistant to dirt. At the same time, the surface of wood products is more knotty, not beautiful. Paint can solve this problem at the same time. Second, the classification classification at home and abroad paint coatings lot can be broadly summarized as the standard classification and customs classification of two kinds. The former, as a method of classification and numbering by the relevant departments of the country as a standard, is convenient for uniform use by various industries throughout the country; the latter is a classification method that people are accustomed to. 1. Standard classification: The classification of coating products stipulated in the relevant standards of our country is based on the classification method based on the film-forming substances in the coating composition. If the film-forming substance is composed of two or more resins, it is based on a resin that plays a major role in the coating film. In accordance with the actual situation of paint products produced by China's paint industry, currently paint products are divided into 18 categories. Such as phenolic resins, polyurethanes and so on. 2. Habitat classification: For a long time, people used to classify and name paint composition, performance, use, construction, curing mechanism, filming sequence and other compositional characteristics. According to the drying mechanism, it is divided into volatile drying and curing drying coating; according to the composition features, it is divided into oily and resin; according to the characteristics of the solvent, it can be divided into solvent type, solvent-free type, water-soluble coating, etc.; Transparent and opaque coatings, etc.; According to the storage and construction of the components can be divided into one component and multiple components. 3. Types of paints : There are various kinds of paints, and several commonly used interior wall paints are briefly introduced here; 106 interior wall paints, 107 interior wall paints, 803 interior wall paints, polyvinyl acetate latex paint interior wall paints, and plastic paints. Wall paints, EPB interior latex paints, styrene-acrylic latex paint interior wall paints, 804 floor paints, E-B interior wall colorful latex paints, expanded perlite inner wall paints, wool surface ceiling paints, porcelain glazes, exterior wall paints, etc. 4. According to different parts, the paint is mainly divided into wall paint, wood paint and metal paint. Wall paint includes exterior paint, interior wall paint and top paint. It is mainly latex paint and other types; wood paint mainly includes lacquer, polyurethane paint and so on. Metal paint is mainly enamel paint. 5. According to different conditions, the paint can be divided into water-based paint and oil paint. Latex paint is the main water-based paint, while nitro-lacquer, polyester ammonia paint, etc. are mostly oil paints. 6. According to different functions, paint can be divided into many kinds: waterproof paint, fireproof paint, anti-mold paint, anti-mosquito paint, and multi-functional paint with a variety of functions. 7. According to the form of action can be divided into volatile paint and non-volatile paint. 8. According to the surface effect points, it can be divided into transparent paint, translucent paint and opaque paint.
Third, the paint species 1, wood paint . 1) Nitro varnish. Nitro varnish is a kind of transparent paint made of nitrocellulose, alkyd resin, plasticizer and organic solvent. It is a kind of volatile paint, with quick drying and soft gloss. Nitro varnish is divided into light, semi-matt and matte, which can be selected according to the need. Nitro-lacquer also has its disadvantages: high wet weather is easy to whiten, low fullness, and low hardness. A) Hand sweep paint. One type of nitrocellulose varnish is a non-transparent paint made of nitrocellulose, various synthetic resins, pigments, and organic solvents. This paint is specially formulated for artificial construction and has a quick drying feature.

B) Main auxiliaries for lacquer
a. That day water. It is a colorless, transparent liquid with a banana odor that is a mixture of organic solvents such as esters, alcohols, benzene, and ketones. Mainly from the nitrocellulose lacquer and curing. b. White water, also known as anti-white water, is called ethylene glycol monobutyl ether. In the wet weather construction, the film will have a whitening phenomenon. The addition of nitromagnetized white water with a diluent amount of 10~15% can eliminate it. 2) Polyester paint. It is a thick paint made of polyester resin as the main film forming material. The paint film of the polyester paint is full and the layer is hard. Polyester paint also has a variety of varnish, called polyester varnish. Polyester paints need to be cured during the construction process. The amount of these curing agents accounts for one third of the total paint content. These curing agents are also called hardeners and their main component is TDI (toluene diisocyanate). These TDIs that are in the free state will turn yellow, which will not only make the furniture painted yellow, but also make the neighboring walls yellow. This is a major drawback of polyester paint. At present, yellow-resistant polyester paint has appeared on the market, but it can only be resistant to yellow and cannot completely prevent yellowing. In addition, free TDI beyond the standard can also cause harm to humans. The harm of free TDI on human body is mainly sensitization and stimulatory effects, including symptoms such as causing painful tearing, conjunctival hyperemia, coughing chest tightness, shortness of breath asthma, red papules, rash, contact atopic dermatitis and other symptoms. The international limit for free TDI is controlled below 0.5%. 3) Polyurethane paint. Polyurethane paint polyurethane paint that is polyurethane paint. Its film is tough, full gloss, strong adhesion, water resistance, abrasion resistance and corrosion resistance. It is widely used in advanced wood furniture and can also be used on metal surfaces. The disadvantages are mainly the problems of bubbling in contact with water and paint powder. As with polyester paint, it also has the problem of yellowing. The varnish variety of polyurethane paint is called polyurethane varnish. 2, the paint within the paint can be divided into soluble and latex paints. General renovations use latex paint. Latex paints are emulsion paints. According to the different substrates, they are divided into two categories: polyvinyl acetate emulsion and acrylic emulsion. The latex paint is made of water as a diluent, which is a kind of lacquer that is easy to construct, safe, washable, and has good air permeability. It can be formulated with different colors according to different color schemes. The paint composition of latex paint consists essentially of water, pigments, emulsions, fillers and various additives. These raw materials are not toxic. As a latex paint, it is likely that the main poison is the organic mercury contained in the film-forming agent ethylene glycol and the fungicide. At present, the market is very fierce about toxic paint on latex paint, mainly caused by the ignorance of the information publishers, these people did not analyze the wall paint what kind of paint is the case that the paint paint is toxic is not a Responsible practices. At present, the so-called latex paints that contain a large amount of formaldehyde in the market are actually water-soluble paints, not latex paints. Some unscrupulous manufacturers use inferior water-soluble paints to paint latex paints. Therefore, choosing the right goods and maintaining ventilation is an effective way to prevent pollution. 3, exterior latex wall paint interior latex paint and substantially similar properties. However, the paint film is harder and has stronger water resistance. Exterior latex paints are generally used on exterior walls and can also be used in high humidity areas such as toilets. Of course, exterior latex paint can be used internally, but please don't try to use exterior latex paint for external use. 4, are made of fire retardant paint retardant paint film formers, flame retardants, blowing agents, and other materials made of a fire-retardant material. Due to the large amount of flammable materials such as wood and fabrics currently used in households, fire prevention has become a topic worthy of mention.

Three trees paint paint paint latex paint furniture home renovation home