Common knowledge of coatings: introduction to types and properties of common roof coatings in the United States

Core tips: commonly used roofing coatings in the United States include acrylic polymers, aluminum powders (Li Qingji), ceramic emulsions, epoxy, polyurea, polyurethane (single component and catalyst), silicone (breathable and airtight) and other coatings Each additive has its own advantages and disadvantages The general characteristics of each type of roof coating are introduced as follows: Acrylic roof coating Acrylic roofing coatings are usually waterborne polymer emulsions, which can be modified with special additives and fillers to provide suitable performance for different conditions For example, plasticizer or catalyst can be used to change the film formation time Generally speaking, quality water 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 Paint Home News: commonly used roofing coatings in the United States include acrylic polymers, aluminum powder (Li Qingji), ceramic emulsion, epoxy, polyurea, polyurethane (single component and catalyst), silicone (breathable and airtight) and other coatings Each additive has its own advantages and disadvantages The general properties of each type of roofing paint are as follows: acrylic roofing acrylic roofing coatings are usually waterborne polymer emulsions, and can be modified with special additives and fillers to provide corresponding properties for different conditions, such as plasticizers or catalysts, which can change the filming time Generally speaking, the quality level depends on the total amount of acrylic polymer contained in the additive per gallon The content of acrylic polymer can be as high as 85%, but more or less solid can replace the filler of acrylic polymer Fillers can provide a certain UV resistance linearity to the additive, which may not always affect the overall quality of the roof coating Too many fillers will affect the elongation and adhesion of the coating However, in general, the more acrylic polymer contained per gallon, the better the expected functional properties of the coating The weatherability of acrylic polymer coating may vary greatly according to the formulation of the coating A trowel type acrylic mastic is used to supplement the acrylic coating system, which is used for horizontal vertical joint transition part, sealing the metal lap joint with glass fiber or non-woven polyester felt, or sealing the perimeter of the penetration part of the roof The aluminum powder asphalt roofing paint aluminum powder asphalt roofing paint can be formulated by water emulsion or solvent carrier Asphalt based aluminum powder roof coating generally contains aluminum paste and filler in the formula Sometimes add fiber and water or solvent carrier The overall quality of asphalt based aluminum powder roof coating can be determined according to the total amount of aluminum powder flakes per gallon In the formula, the total content of all aluminum powder pastes may change, and it may be difficult to determine the total aluminum powder flakes by the typical product label If the corresponding data cannot be seen in the data sheet or on the product label, the manufacturer's certification may be appropriate The best quality and most durable asphalt based roofing additive shall be at least two pounds of aluminium flakes per gallon of paint instead of two pounds of aluminium paste The reflectivity of asphalt based aluminum powder roof coating may vary depending on whether fiber is added or not and the type and quantity of filler used in the formula Ceramic coatings and ceramic coatings are made up of ceramic particles in solvent base or waterborne emulsion and a carrier (paint, filler, etc.), which can be obtained by several manufacturers Ceramic coating is more expensive In order to compensate for the extra cost of coating, some suppliers publicize the thermal insulation performance of ceramic coating, but provide high reflectivity It is very important to fully understand the thermal insulation performance to ensure the use of this coating to achieve the desired effect Although the acrylic emulsion can be classified as emulsion, the commonly used emulsion in roofing coatings is asphalt based, usually made of bitumen, bentonite and water Some filler or fiber may be added to the emulsion mixture Asphalt emulsion usually has low reflectivity, but when applied to the weathering aging laminated asphalt film, it is easy to fill cracks on the roof surface, fine cracks and holes, smooth the roof surface, and provide a smooth base for the asphalt aluminum roofing reflective coatings The most common use of epoxy coating in roof coating system is to effectively inhibit the corrosion of primer The epoxy coating has a very good bonding performance, which is basically airtight, preventing the air and oxygen that cause corrosion from entering the rusted surface Some epoxy coating systems are used in metal roofing systems They are not often used in low slope house mask systems Polyurea coatings polyurea coatings are used in many applications other than roof coatings Polyurea coatings usually cure hard and have limited elongation, but have high wear resistance If polyurea coating is exposed to the outside, it is easy to be damaged by over walking and bending performance of roof combination Polyurea is also sensitive to certain environmental conditions As long as the polyurea coating is not damaged and still adheres to the roof surface, its weather resistance is generally good Polyurethane coating polyurethane based roof coating can be single-component or catalytic (two-component) Polyurethane based roof coating provides flexibility of rubber type, which is easy to be colored into light color Catalytic polyurethane coatings usually film quickly, which depends on the amount of catalyst added to the substrate When polyurethane coating is applied on the properly prepared base course, it has strong and tough adhesion performance The elongation properties of one component and two-component polyurethane coatings are generally good, maintaining rubber properties throughout their service life Polyurethane coating can be recoated with polyurethane or acrylic coating Silicone coating silicone based roofing coatings are almost exclusively used with spray polyurethane foam (SPE) based roofing systems, providing a waterproof protection layer on the upper surface of the SPE insulation layer Silicone based roof coating has air permeability and air permeability, and each type has its own function in SPE based roof system When recoating the silicone coating, only the primer and additional silicone coating approved by the silicone coating manufacturer shall be used In addition to the above coatings, there are many other coatings including the following: butyl rubber coatings - generally dark, used as primer under the surface Butyl rubber coating is solvent type, with low air permeability; CSPE (hipyron) coating, which is generally white or light colored, is used as base or surface layer, solvent based, high air permeability, UV resistance and good weather resistance; SEBS Elastomer coating, which is composed of styrene, vinyl butadiene and diene styrene copolymers, is used in asphalt based system to resist oil flashing Butyl rubber and CSPE coatings, while still in use, may be more common on existing roof systems Soybean based and SEBS Elastomer coatings are two examples of relatively new coating products 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,