Hello, our company collects various chemical products and raw materials in stock at home all over the country, whether expired, obsolete, unqualified, damaged packaging, etc., and can recover thousands of varieties, such as paint, ink, paint, resin, rubber, thinner, dye, pigment, color base, toner, filter cake, printing paint paste, dye intermediates, pigment intermediates Semi finished chemicals, raw materials of chemical plants, raw materials of rubber plants, raw materials of plastic plants, etc.
Recycle chemical raw materials all year round, recycle chemical solvents, recycle chemical reagents, recycle various chemical raw materials and chemical solvents in stock, and recover chemical raw materials when factories close down.
Recycle chemical raw materials, chemical solvents, chemical reagents, alcohol, caustic soda, ethylene glycol, stearic acid, paraffin, epoxy resin, mercury, sodium dodecyl sulfate all year round
Sulfonic acid, carbon tetrachloride, dichloromethane, potassium dichromate, trisodium phosphate, xylene, ethyl acetate, solvent oil and other chemical raw materials chemical reagents
Recycle chemical raw materials, chemical solvents, chemical reagents, alcohol, caustic soda, ethylene glycol, stearic acid, paraffin, epoxy resin, mercury, sodium dodecyl sulfate all year round
Sulfonic acid, carbon tetrachloride, dichloromethane, potassium dichromate, trisodium phosphate, xylene, ethyl acetate, solvent oil and other chemical raw materials chemical reagents
As early as the Shang Dynasty, China had taken down natural lacquer decorative appliances, palaces and temples from lacquer trees. By the Spring and Autumn Period, we had mastered the technology of refining tung oil to make coatings. In the Warring States Period, we could use raw paint and tung oil to mix coatings. The technology of using additives in coatings promoted the development of coatings to a new era.
The tough and protective film of lacquer coffins and lacquerware unearthed from the Han Tomb at Mawangdui in Changsha fully shows the maturity of the development of the use of raw lacquer technology in China in the 2nd century BC. As a result of the application of tung oil and lacquer, the customary name of "paint" has been handed down.
In the last century, the major achievements in the theory of polymer science and the successful development of various polymer compounds were put into production, which has developed a new era for paint. In the 1920s, alkyd resin used as film forming material of coatings was successfully developed. Since then, various newly developed synthetic resins have been quickly applied in coatings, making coatings enter an era dominated by synthetic film forming materials.
Polyester paint. It is a thick paint made of polyester resin as the main film-forming material. The film of polyester paint is plump, thick and hard. Polyester varnish also has a variety of varnish, called polyester varnish.
The polyester paint needs to be cured during construction, and the amount of these curing agents accounts for one third of the total amount of paint. These curing agents are also called hardeners, and their main component is TDI (toluene diisocyanate). These free TDI will turn yellow, which will not only make furniture paint yellow, but also make adjacent walls yellow, which is a major disadvantage of polyester paint.
Yellowing resistant polyester paint has appeared on the market, but it can only be used for yellowing resistance, and cannot completely prevent yellowing. In addition, the free TDI beyond the standard will also cause harm to the human body.
The main harm of free TDI to human body is sensitization and stimulation, including pain and tears, conjunctival congestion, cough and chest tightness, shortness of breath and asthma, red papules, maculopapules, contact allergic dermatitis and other symptoms. The international limit standard for free TDI is below 0.5%.
1. Phenolic paint has fast drying, high hardness, water resistance, abrasion resistance, but is brittle and prone to yellowing.
2. Nitrocellulose paint is wax gram, which is fast in drying, hard in film, wear-resistant and clear in wood grain, but poor in film fullness.
3. Alcohol ester paint is easy to construct, firmly attached, bright and plump, and is commonly used for painting outdoor wood products, such as doors and windows, railings, and steel structures. However, its film is relatively soft and has poor water resistance, so it is not suitable for floor and desktop.
4. The advantages of unsaturated polyester paint are good fullness, fast drying speed, and suitable for industrial production line.
5. Polyamine ester paint has excellent hardness, toughness, wear resistance and strong decorative property, but contains TDI.
One of the directions of applying nanotechnology to the industrialization of traditional wood paint industry, the technical difficulty lies in the stability of product molecular structure
1. Nano wood paint is made of high-tech nano materials and curing agent, with good leveling, workability and environmental protection.
2. High solid content, high effective film-forming material and large unit painting area.
3. Nano wood primer has good filling property and strong covering power of white primer; The white top coat has a full film, delicate texture, strong yellowing resistance and has been tested; The varnish has high transparency and transparent paint film.
4. In particular, nano wood paint can degrade decoration pollution, decompose benzene, aldehyde, VOC and other harmful organic substances, purify air, and have health care functions for human body.
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