Coating general knowledge: fluorocarbon coating substrate treatment and construction process

Core tips: fluorocarbon building coating, which is made of fluorocarbon resin as the main film-forming material, has the best durability and weatherability among all building coatings at present, so it is called "super weatherability building coating" The first fluororesin coating is made of polytetrafluoroethylene resin (PTFE) developed by Dopont company in the United States It has been used in outdoor buildings for 25 years in the United States In 1982, Asahi company of Japan took the lead in developing fluorocarbon resin for solvent soluble coatings In recent years, American ATO company has developed vfihfp Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Coating home news: the durability and weatherability of the fluorocarbon building coating prepared with fluorocarbon resin as the main film-forming material are the best among all building coatings at present, so it is called "super weatherability building coating" The earliest fluororesin coating is made of polytetrafluoroethylene (PTFE) developed by Dopont company in the United States It has been used in outdoor buildings for 25 years in the United States In 1982, Asahi company of Japan took the lead in developing fluorocarbon resin for solvent soluble coatings In recent years, American ATO company has developed vfihfp copolymer Ausimost has recently developed a soluble fluororesin with hydroxyl group, which can be used in building materials The fluorine-containing coatings with self cleaning function have been developed successfully and put into application Domestic units such as Tianjin, Hangzhou, Qingdao and other relevant units have also developed corresponding fluorocarbon resin for construction At present, some private paint factories are also developing fluorocarbon resin, but the research of fluorocarbon paint construction technology lags behind, which seriously affects the development of building fluorocarbon paint In this paper, the author has inspected some fluorocarbon paint projects, such as a university in Guangzhou University Town, a plaza in Zhongshan Xiaolan, a construction site in Yantian District of Shenzhen City, and so on, all of which have problems of cracking, blistering, water seepage, poor stain resistance, etc the author has collected some construction technologies of some units, all of which have problems of complex technology and high cost Tianjin Guangyuan Huitong Technology Development Co., Ltd provides a set of fluorocarbon paint construction technology for your reference 1 The requirements for the base material of fluorocarbon paint construction are the same as those for general exterior wall paint The base material must be solid, water-resistant, pH < 10, water content < 8%, ash free, mildew free, etc the higher requirement is that the batch of ash layer must be waterproof, crack resistant, alkali resistant, solid, flatness < 2mm, good construction, reasonable cost, durable for more than 30A 2 The construction procedure of fluorocarbon paint: the base material treatment is up to the standard → the first batch of anti crack waterproof putty → the second batch of anti crack waterproof putty → the first batch of polishing putty → the first layer of glass fiber anti crack net → the two-component putty can be polished once → the PU primer once → the fluorocarbon surface paint twice 3 The construction technology of fluorocarbon paint is introduced according to the construction procedure of fluorocarbon paint 3.1 base material treatment: general buildings are of cement structure Cement has Cao, and strong alkaline will cause carbonation and chlorination, thus damaging the wall Generally, the curing period of cement structure is 26D After 26 days, the structure strength was strong, the alkalinity was low, and the water content decreased The high pH value of cement can't be neutralized by acid absolutely, which is a man-made damage to cement and will aggravate the flooding of salt and alkali The second is to do a good waterproof treatment Water seepage is the root cause of the problems of architectural coatings For substrate treatment, we measured and recorded the following data: pH < 10, water content < 8% 3.2 batch of crack resistant and alkali resistant waterproof putty the single component dry powder putty or two-component dry powder putty currently used in fluorocarbon paint does not have crack resistant, alkali resistant and waterproof functions Such putty after construction has laid a curse for fluorocarbon paint Therefore, a kind of crack resistant, alkali resistant and waterproof putty has been successfully studied in this paper The putty has good construction, good filling performance, material saving, crack resistance and waterproof functions We have tested its static water-proof function in this way: dry the sample with putty for 3 days, drop 3 g water on its surface, cover it with a glass cup, and leave 2.5 g water on its surface after 30 days Putty generally emphasizes its water-resistant performance, and putty for fluorocarbon paint construction must be more waterproof, because the root of foaming of fluorocarbon paint of some companies lies in this Fluorocarbon putty must have a slight elasticity, single component dry powder putty is a rigid structure, and it must crack after use for a long time The two-component putty is too thick to be scraped and applied, and the maintenance is not in place, and it will crack and pan alkali At present, all the projects of fluorocarbon paint are cracked to different degrees, which is the reason Generally, anti cracking fluorocarbon paint putty is constructed twice, with an interval of 4-8h and a dosage of 0.8-1kg each time 3.3 The purpose of polishing putty once and again is to improve the smoothness of putty and the consistency of the color of the plaster layer 3.4 paste a layer of glass fiber anti crack net, which has the properties of anti moth, air permeability, non combustion, water-proof, cleanable, acid and alkali resistance, anti crack and anti impact, with a service life of more than 25A Stick a layer of glass fiber anti crack net to protect the wall Generally, the embedding method is more scientific and reasonable After the installation, each part must be closely attached to the wall, basically in the same plane, with appropriate tightness and drying for more than 8h 3.5 batch of burnable two-component putty, one coat of fluorocarbon paint and the last coat of putty must be smooth, smooth and free of pores Therefore, a layer of two-component putty is beneficial to grinding, with good adhesion and crack resistance Generally, the additive part of the two-component putty should not be too much, otherwise, it is not conducive to grinding If it is too little, the adhesion force is poor and easy to crack, generally 10% The two-component putty can be polished 8 hours after it is evenly mixed on the wall After it is polished, wash it with a large amount of water, and then spray water every 8 hours After that, spray water every 4 hours for 3 times, and dry it for 48 hours The amount of putty in this layer generally does not exceed 0.8kg/m2 3.6 spray Pu primer for one time Generally, fluorocarbon paint adopts Pu as primer for construction The performance can meet the requirements, and the cost is relatively low Spray Pu on two-component putty without cracking or softening, fast drying, strong adhesion and high strength Polish it slightly after 8h to remove dust, generally 6-8m2 / kg times, and dry for more than 24h 3.7 spray two coats of fluorocarbon finish paint Mix the fluorocarbon paint evenly, filter and activate it for 30min Generally, the dosage of two coats is 4-5m2 / kg Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,