Low-carbon environmentally friendly floor coatings in the field of construction applications

China Paint Online News Information
Lia, Han Limin (Fuss Special Paint (Beijing) Co., Ltd., Beijing 100078)
Summary: Introduction of organic materials-type flooring coatings, epoxy flooring coatings in the parking lot system applications, underground garage flooring selection, research and development of water-based epoxy flooring coatings and application advantages.
keywords: floor paint; water-based epoxy; parking lot; humid environment
low-carbon environmental protection
0 Introduction
In modern buildings, the floor in the building on the one hand carries the role of moving, static load, on the other hand, but also bear friction loss, impact damage, various liquids and gases and environmental durability erosion, at the same time has beautify the overall building, to ensure the building style consistent important role. There are two main categories of inorganic materials and organic materials, and this paper focuses on the application of organic materials-type flooring coatings in the field of construction.organic flooring materials include epoxy resins, polyurethanes, acrylic (crosslinking) and polyurethane flooring materials. Domestic organic flooring materials are still dominated by epoxy resins.
1. Overview of the foreign organic flooring industry
Organic flooring coatings were first developed in Germany in the 1930s, mainly made of resins, pigments, solvents, etc. Modern industry has put forward more and more strict requirements for the floor, such as food, medicine and other industries require that the floor is not gray, no harmful volatiles, clean and dust-free; In addition, modern workshop, high-end residential areas and family floor should be flat, bright, rich in color, to create a good working and living environment for people. Because solvent-based epoxy floor coatings in the production, construction and curing process will emit a certain amount of volatile organic matter (VOC), and solvent-free epoxy flooring coatings in line with environmental protection concepts, non-volatile organic emissions, so foreign flooring coatings have gradually transitioned to solvent-free system-based, and solvent-based systems have been very few.2. Overview of the domestic organic floor coating industry
Compared with foreign industrial developed countries, China's flooring coating industry started late. However, with the implementation of the reform and opening-up policy, a large number of foreign floor paint products into our country, because of its materials and construction performance is good, once favored by the construction industry. The development of the production and application technology of floor coatings in China started in the Yangtze River Delta and Pearl River Delta regions with rapid economic development, and began to enter the northern region in the late 1990s and was gradually accepted and recognized, and the number of enterprises entering the industry has gradually increased. Modern plant, workshop, warehouse, logistics center, supermarket, exhibition hall, garage, parking lot and other occasions, the vast majority of the use of floor paint products as ground decoration. Domestic floor coatings to epoxy-based, and still solvent-based epoxy-based (about 70% to 80% of the total), as one of the earliest materials used in the flooring, epoxy resin products are the most mature technology and the largest amount of dosing.Although China's floor coating industry in the last 10 years has a rapid development, but the market share is still very low, with China into the overall construction of a well-off society in the historical process, it can be expected that the future capital construction, technological transformation, real estate and other investment scale will be maintained at a higher level, people's needs are moving to better, more comfortable and more healthy development. In view of the irreplaceable advantages of flooring coatings and with the improvement of public awareness, China's flooring coatings industry also has considerable room for development, flooring coatings market capacity is huge.application of epoxy flooring coatings in parking systems
parking lots have a variety of special and demanding conditions compared to other structures of buildings. Usually in an open environment, outdoor parking will be subject to high temperature, sun exposure, low temperature, freezing and melting cycle, heavy rain wash and other tests. And located in the underground parking garage, but also long-term dark, humid, car oil leakage, battery electrolyte, cleaning and other problems. At the same time, the moisture in the air and chemical pollution, active load and other moments of concrete corrosion, extrusion and tearing, so that the structure is potentially damaged. An unprotethed concrete base grinds smoother and is a great risk to the vehicle's braking.garage flooring system is widely used in parking lots all over the country, and the most widely used system is the wear-resistant pressure epoxy flooring. Wear-resistant heavy pressure epoxy flooring refers to the formation of a 1 to 3mm epoxy floor coating system after multiple coatings. Products flat and seamless, resistant to acid and alkali, waterproof and oil-resistant, strong impact resistance, chemical resistance, moisture-proof anti-slip.
In order to correctly select the type of flooring, and effectively control costs, it is recommended to consider the choice of underground garage flooring from the following aspects:
(1) mechanical performance requirements
(1) wear resistance: the flooring in use of which vehicles will walk.
vehicles drive into the garage, tires can easily be brought into a certain amount of sand or acid and alkalis and other corrosive. media, these will have a certain wear on the floor. The self-weight of the vehicle, the shape of the tire and many other factors will affect the degree of wear and tear of the floor, so before choosing the type of flooring, the type of vehicle walking in the garage needs to have a certain degree of predictability.(2) pressure resistance: how much load the floor will carry when used.
garage flooring in the design process, it is recommended to divide its thickness by area, for example, the use of a higher frequency of lanes, can do 1.5 to 2.0mm wear-resistant heavy pressure epoxy floor; This can both meet the use of the effect, but also save costs.(3) impact resistance: whether the impact force will cause the surface peeling.
the epoxy flooring is not as hard as possible, people often hope that the stronger the material, the better, while ignoring its brittle fracture. Brittle fracture is in fact the fatal weakness of the material, so only taking into account the balance of strength and flexibility, epoxy flooring can achieve excellent impact resistance.(2) chemical properties require
(1) acid-resistant alkaline: the type and concentration of corrosion-resistant chemicals used.
garage in the process of use, it is inevitable that corrosive substances will be brought in, floor products should have a certain degree of corrosion resistance, but a long time soaked by chemicals, will reduce its service life, so found that such substances need to be cleaned up in a timely manner.
(2) oil and water resistance: resistance to oil and water when used. Of course, especially long-term water stains and oil immersion, but also may cause the surface of the paint film foaming, peeling or even fall off and other phenomena, so the ground oil and water, need to be cleaned up in time.(3) floor location status
(1) according to the location of the floor is in the underground floor or the ground floor analysis, such as water content is too high, should be ventilated drying or waterproof treatment, local can take drying methods;(2) garage ramps need to choose non-slip floor, depending on the size of the slope, you can choose different degrees of non-slip product system.
(3) there is sunlight exposed ramps or outdoor parking lots, the use of outdoor weather-resistant floor paint construction, to ensure the best use of the effect.
(4) substing condition
(1) base strength: concrete pressure strength is generally required to ≥ 20MPa.
(2) flatness: smoothing through the difference needs to be repaired with epoxy mortar.
(3) sand, empty drum: for sand, empty drum parts of a large area of construction need to do a good job before the pre-treatment.
(5) aesthetic requirements
(1) color requirements: according to different areas can be divided into different colors, in order to achieve aesthetic effect.
(2) brightness requirements: high-gloss self-leveling products, or half-gloss solvent-based products can be selected.
4. Development of energy-saving and environmentally friendly epoxy flooring coating products
is being approved "environmentally friendly flooring coatings" national standards for the environmental performance of flooring materials put forward specific requirements, at the same time with the development of coating science and technology and people's new ideas and regulatory awareness, environmental protection has put forward higher and higher requirements. The development of floor coatings towards solvent-free and water-based coatings has become the consensus of the coating industry. Among them, water-based epoxy coatings, especially water-based epoxy coatings cured at room temperature research has been breakthrough, its performance has reached the same level as solvent-based epoxy coatings.4.1 The main features of water-based epoxy floor coatings
(1) have good breathability, good adhesion to most substrates, and good bond
ing on wet substrate surfaces
; Environmental protection and safety, tasteless and pollution-free, water as a dispersed medium, non-combustible, storage, transportation and use in line with national requirements;
(4) has high hardness, good wear resistance, acid, alkali and other properties;
(5) construction operation is safe and convenient, construction tools can be directly washed with water, and repeated use, reducing construction costs.
(6) Water-based epoxy floor coating due to the special nature of curing makes the dry coating film with micropores, allowing water vapor penetration, which releases the pressure of water vapor inside the concrete, so that the coating is free from damage, while protecting the concrete.
4.2 The main advantages of water-based epoxy flooring coatings in their application
Compared with solvent-based flooring coatings, water-based epoxy flooring coatings are non-toxic, tasteless, environmentally friendly, and have a variety of physical properties and chemical resistance very close. Compared with more than 2mm thick coated solvent-free epoxy self-leveling floor, water-based epoxy flooring can be made into a thin coating of 0.5mm thick, which has an advantage in terms of cost per unit area coating. It can also be applied directly to wet ground without clear water.The main applications of water-based epoxy flooring include: hospitals, kindergartens, pharmaceutical plants, office areas, schools, etc. with environmental protection requirements;
addition, water-resistant epoxy products can also be applied to food factories, kindergartens, hospitals and other walls with higher chemical resistance requirements, that is, can be used in wall construction.
. Conclusion
With the enhancement of environmental regulations and people's awareness of environmental protection, water-based epoxy flooring coatings with its obvious advantages, more and more recognized by the market. The research and promotion of water-based epoxy flooring coatings have great economic and social benefits. Water-based epoxy floor coatings can be adapted to the first floor, basement, underground parking lot and other humid environment, especially suitable for the renovation and maintenance of old ground. As a green, low-carbon, environmentally friendly products, water-based epoxy flooring coatings are bound to be recognized and widely used.
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