Common knowledge of coating: element organic resin coating (3)

Key tips: Section II organic fluorine resin coating I overview Fluorocarbon coating is a kind of coating with fluoroalkene polymer or copolymers of fluoroalkene and other monomers as the main film-forming substances It is also commonly called fluorocarbon coating or fluorocarbon coating in China Dr R Plunkett invented polytetrafluoroethylene (PTFE) in 1938 On this basis, DuPont took the lead in developing a successful product named "teflo" in 1946 Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Coating home news: Section 2, organic fluororesin coating 1, overview of fluoroalkene polymers or copolymers of fluoroalkene and other monomers as the main film-forming substances of the coating called "fluorocarbon coating", China is also used to call fluorocarbon coating or fluorocarbon coating In 1938, Dr R Plunkett of DuPont Research Office in New Jersey invented polytetrafluoroethylene (PTFE) On this basis, DuPont took the lead in developing a successful trade name of "TEFLON" fluorocarbon coating in 1946, which opened up a precedent of fluorocarbon coating The fluorocarbon coating made of PTFE is widely used in the field of surface coating of industrial products such as instrument cookers, electric irons and auto parts In 1965, atofina company launched PVDF (polyvinylidene fluoride resin) and commercialized the product named "Kynar 500", which is widely used in the production of building coatings Since then, in the 1970s, DuPont company has industrialized the production of PVF (polyfluoroethylene resin) As a fluorocarbon resin with the lowest fluorine content and low production cost, it is still applied in the inner wall coating of packaging containers All the above three fluorocarbon resins belong to crystalline polymers, which are insoluble in organic solvents and can only be made into dispersions in the solvents When drying, the film needs to be sintered at a temperature above 230 ℃ Because it can't be painted and dried like the common solvent soluble coating, its application range is limited Until 1982, Asahi Glass) Zhushi society has launched FEVE, a kind of copolymer resin with the trade name of "lumiflon", which provides the solubility of fluorocarbon resin in aromatic, ester, ketone or alcohol ether solvents, overcomes the shortcoming that fluorocarbon resin must be sintered at high temperature, so that the fluorocarbon coating made of it can be solidified into film at room temperature or low temperature In order to make it possible, the application range of fluorocarbon coatings has been greatly expanded and widely used Compared with the above coatings made of PTFE, PVDF and PVF fluorocarbon resin, the fluorocarbon coatings made of FEVE fluorocarbon resin have the following characteristics: -- solubility in organic solvent -- can be cured at room temperature or low temperature -- can be made into glossy and transparent coating film -- which provides good dispersion of pigment in resin solution ——The film has good adhesion to the substrate - either in the factory or in the field - and can be recoated It is the innovation of this resin synthesis technology that makes a breakthrough in the performance of fluorocarbon resin It is also the coating made of FEVE fluorocarbon resin that has the above characteristics that makes it possible for fluorocarbon coating to enter the common coating field and obtain a considerable range of applications At present, fluorocarbon resin cured at room temperature and low temperature can be synthesized by copolymerization of two kinds of fluoroalkenes and other monomers One is copolymerization of vinylidene fluoride (VDF) with other fluorine-containing monomers, the other is copolymerization of trifluorochloroethylene (CTFE) or tetrafluoroethylene (TFE) with other fluorine-free monomers For example, a copolymer of vinylidene fluoride tetrafluoroethylene hexafluoropropylene (fluororesin 246) can be dissolved in ketone and ester solvents In the 1960s, the weatherproof coating named kynarads, which was introduced by atofina company in the United States, was one of them Another example is the zeffle LC series of one component normal temperature drying fluorocarbon coating from Daikin company of Japan The FEVE type fluorocarbon resin can be synthesized by copolymerization of trifluorochloroethylene or tetrafluoroethylene with alkyl vinyl ether or alkyl vinyl ester and introducing functional group compounds such as hydroxyl and carboxyl groups The two-component room temperature curing (or baking curing at 80 ℃) fluorocarbon coating can be made by this kind of resin and aliphatic toluene diisocyanate It can also be made into one component baking curing fluorocarbon coating with amino resin or blocked isocyanate resin Lumiflon, a subsidiary of Asahi, Japan, is the representative of a kind of copolymerized resin of trifluorochloroethylene and alkylvinyl ether, while zeffle GK series of fluorocarbon resin of Daikin, Japan, belongs to FEVE fluorocarbon resin, in which tetrafluoroethylene is a fluorine-containing monomer and alkylethanoethylene ether are copolymerized The home of coating materials focuses on coating, diatom mud, paint coating and coating technology, News and information of fire retardant coating, coating, diatom mud, paint coating, coating technology, decoration knowledge and decoration effect map of fire retardant coating,