1. Polyester lacquer is characterized by the formation of acyclic and/or circular hydrogen bonds between polymer molecules. Under external force, hydrogen bonds can be separated to absorb external energy (20~25kJ per mole of absorption). When the external force is removed, the hydrogen bond can be reformed again. Such a hydrogen bond cleaves and re-forms reversibly, giving the polyurethane paint film a high degree of mechanical wear resistance and toughness. Compared with other paints, under the same hardness conditions, polyurethane paint film has the highest elongation at break due to hydrogen bonding, so it is widely used as floor paint, overtime paint, high decorative anticorrosive paint, and the like. 2. Some varieties of coatings (such as epoxy, chlorinated rubber, etc.) have good protection and poor decorativeness; some varieties (such as nitrocellulose lacquer) have good decorative properties and poor protection. However, polyurethane paint is both protective and decorative, and can be used for the coating of high-grade wood, piano, and large passenger aircraft. 3, the paint film has strong adhesion. Polyurethane, like epoxy, can be formulated as an excellent binder. Therefore, the coating film has excellent adhesion to various surface materials (metal, wood, rubber, concrete, certain plastics, etc.). The author's experience is that for some metal surfaces, the adhesion of polyurethane paint is slightly inferior to that of epoxy paint; but for rubber, the polyurethane paint exceeds the epoxy paint. 4, the elasticity of the coating film can be adjusted according to the needs of the distribution ratio, can be adjusted from the extremely hard coating to the extremely flexible elastic coating, while the general paint such as epoxy, unsaturated polyester, amino alkyd, etc. can only It is difficult to impart high elasticity by making a rigid coating. 5, the coating film has excellent chemical resistance, acid, alkali, salt liquid, petroleum products, so it can be used as maintenance coating for drilling platforms, ships, chemical plants, and inner wall coating of petroleum storage tanks. 6, can be dried at high temperatures, but also can be cured at low temperatures. In a typical room temperature curing coating: epoxy, polyurethane, and unsaturated polyester, epoxy and unsaturated polyesters are difficult to cure at 10 ° C. Only polyurethane can be cured at 0 ° C, so the construction season long. Because it can be cured quickly at room temperature, it can be used for large-scale projects such as large oil tanks and large aircraft to achieve better performance than ordinary baking varnishes. 7, polyurethane paint can be made resistant to -40 ° C low temperature varieties. It can also be made into high temperature insulating varnish with properties close to polyimide. 8. The electromagnetic wire coated with polyurethane paint can be used for automatic assembly of tin in molten solder without scraping paint. It is especially suitable for the assembly of telecommunication equipment and instruments. 9, it can be combined with polyester, polyether, epoxy, alkyd, polyacrylate, cellulose acetate butyrate, vinyl chloride vinyl acetate co-ester, asphalt, dry oil, etc., according to different requirements Made into many varieties. 10, can be made into solvent, liquid solvent-free, powder, water, single filling, two filling and other forms to meet different needs. Thin Tape Hydraulic Jack,Thin Tape Lifting Jack,Electric Hydraulic Jack,Thin Belt Hydraulic Jack Jiangsu JOBA Mechanical Manufacture Co., Ltd , https://www.jsjoba.com
Polyurethane paint advantages
Jc001.load('iframe') JIFrame.create({ 'url' : '/go.php?action=ads&iframeHeight=250&isIframe=1&key=%D3%CD%C6%E1&pos_id=jc001_news_detail_30&reqkey=1&style=margin%3A15px+15px+ 25px+0%3B+height%3A255px%3Bwidth%3A255px%3B+float%3Aleft%3B', 'height' : 250 })