Paint knowledge classification of fire retardant coatings for steel structures

Core tip: with the continuous development of steel structure market, the protection measures for steel structure buildings have also been put on the agenda, in which the emergence of steel structure fire retardant coating can effectively protect steel structure buildings The steel structure fire retardant coating is applied or sprayed on the steel structure surface to play the role of fire protection and heat insulation, to prevent the steel from rapidly heating up and reducing the strength in the fire, and to avoid the collapse of the building due to the loss of support capacity of the steel structure So what are the classification of fire retardant coatings for steel structures and what are the differences? 1 Thick coating fire retardant coatings for steel structures refer to coatings with a thickness of 8-50mm This kind of fire retardant coatings Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Home of coatings news: with the continuous development of steel structure market, the protection measures for steel structure buildings have also been put on the agenda, in which the emergence of steel structure fire retardant coating can effectively protect steel structure buildings The steel structure fire retardant coating is applied or sprayed on the steel structure surface to play the role of fire protection and heat insulation, to prevent the steel from rapidly heating up and reducing the strength in the fire, and to avoid the collapse of the building due to the loss of support capacity of the steel structure Then what are the classification of steel structure fire retardant coating and what are the differences? 1 Thick coating steel structure fire retardant coating thick coating steel structure fire retardant coating refers to the coating thickness of 8 ~ 50mm, the fire resistance of this kind of fire retardant coating can reach 0.5 ~ 3H In case of fire, the coating will not expand Depending on the incombustibility, low thermal conductivity of the material or the heat absorption of the material in the coating, the temperature rise of the steel will be delayed and the steel parts will be protected This kind of fireproof coating for steel structure is made of suitable binder, inorganic light material and reinforced material Compared with other types of fire retardant coatings for steel structures, in addition to some advantages of water-soluble fire retardant coatings, the cost is low because it is inorganic from the base material to most additives This kind of fireproof coating for steel structure is generally applied by spraying, which is mostly applied to indoor steel structure with fire endurance requirement of more than 2H However, due to the thick coating, the appearance of this kind of products is relatively poor 2 The steel structure fire retardant coating with the thickness of 3-7mm is called thin coating steel structure fire retardant coating This kind of coating can expand and foam when it is on fire The fire-resistant insulation layer formed by expansion and foam can delay the temperature rise of steel and protect steel members This kind of steel structure coating is generally composed of suitable latex polymer as base material, flame retardant and additives For this type of fire retardant coating, the emulsion polymer required must have good adhesion, durability and water resistance to the steel substrate Emulsion polymers commonly used as base materials for such fire-retardant coatings are styrene modified acrylic emulsion, polyvinyl acetate emulsion, vinylidene chloride emulsion, etc For waterborne emulsion as the base material, the fire retardant coating, flame retardant additives, pigments and fillers are dispersed into the water Therefore, water actually acts as a dispersing carrier In order to better disperse granular additives, dispersants, such as commonly used sodium hypophosphite six, are added The fire retardant coatings for steel structure are generally divided into 3 steps in the production process: first, dispersing various flame retardant additives in water, then grinding them into the slurry with specified fineness; the second step is to use the base material (emulsion) to paint; the third step is to mix the inorganic light materials and reinforcing materials in the slurry evenly The coating is generally divided into the bottom layer (thermal insulation layer) and the surface layer (decorative layer) Its decorative performance is better than that of the thick coating The coating is applied in the construction, generally used in the building steel structure with the fire resistance limit of no more than 2H 3 Ultra thin fire retardant coating for steel structure ultra thin fire retardant coating for steel structure refers to the fire retardant coating for steel structure with a coating thickness of no more than 3mm This kind of fire retardant coating expands and foams when exposed to fire, forming a dense fire insulation layer, which is a new type developed in recent years It can be applied by spraying, brushing or roller coating, and is generally applied to the building steel structure with fire resistance limit less than 2H Compared with thick coating and thin coating steel structure fire retardant coating, the Ultra-thin Intumescent steel structure fire retardant coating has finer viscosity, thinner coating, convenient construction and better decoration In order to meet the fire protection requirements and high decorative requirements, especially for the exposed steel structure, this kind of coating is currently favored by users In a word, due to the short time of research on ultra-thin steel structure fire retardant coating in China, although the research on the fire performance and physical and chemical properties of the coating has made rapid progress, it is necessary to further study its weather resistance in order to put forward the ultra-thin steel structure fire retardant coating with excellent effect suitable for outdoor application The foreign fireproof coating for steel structure has developed towards ultra-thin, super weatherability and excellent decorative performance The weatherability test has been carried out according to the European standard method of aging test The weatherability of the coating meets the requirements of outdoor use Therefore, in order to catch up with or surpass the similar products of foreign countries and meet the needs of the market, the research and development of outdoor ultra-thin steel structure fire retardant coating with high weatherability is the future development direction 4 In addition to steel structure fire retardant coating, facing fire retardant coating and cable fire retardant coating are also developing rapidly Facing fire retardant coating is a new type of coating which integrates decoration and fire prevention When it is applied on combustible base material, it can play a decorative role at ordinary times; once a fire occurs, it can prevent the spread of fire, so as to achieve the purpose of protecting combustible base material It is precisely because of its special use, so the foreign industrial developed countries as early as the 1920s there was a fire retardant coating The development of this kind of coating has gone through two stages At the initial stage, inorganic fire-retardant coating with silicate salt glass as binder appears Such fire-retardant coating does not burn on its own, and can form hollow core foam layer in case of fire, which has a certain protective effect on combustible base materials The disadvantage is poor heat insulation performance and weather resistance, and it is easy to produce whitening, cracking and falling off 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,