Water-based paint is harmless to the human body, does not pollute the environment, is full of paint film, crystal clear, flexible, and has water resistance, wear resistance, aging resistance, yellowing resistance, fast drying, easy to use, etc. The following Xiaobian tells everyone 1. Say the water-based paint you should know.
Paint development
Paint has been deeply rooted in consumers. Many consumers know very little about paint. Some bosses who have been selling paint for more than a decade are not very aware of the dangers of paint. Paint can only be used one month after painting. Consumers think that paint is not toxic at this time. In fact, this is wrong. There is no irritating odor. Only formaldehyde volatilizes to the extent that human physiology can accept. Benzene and toluene contained in paint curing agent and diluent. Free TDI is still volatilizing. It takes at least several decades for these things to completely evaporate. These aromatic hydrocarbon substances have a great influence on the mental development of infants and unborn children. Free TDI is also a carcinogenic risk. In the developed countries of Europe, the use of paint was banned very early.
development stage
In general, water-based paint technology has experienced three main stages:
The first generation of water-based paints uses acrylic acid as the main raw material, which has the advantages of water resistance and weather resistance. Its disadvantages are general performance, low chemical properties (such as poor resistance to alcohol and alkali), hardness, wear resistance and other physical properties. The indicator is low, which is why most people think that water-based paint is not good.
The second-generation water-based paint is based on the composite of acrylic acid and water-based polyurethane. It not only inherits the weather resistance of the first-generation acrylic product, but also has good construction tolerance. It also improves the hardness of the water-based paint, but the chemical properties are still low. At present, there are only a few companies in China that can produce, and it is a mid-range product in water-based paint.
The third-generation water-based paint uses acrylic-modified water-based polyurethane as the main raw material. On the basis of the second-generation water-based paint product, the comprehensive performance of the product is greatly improved. The pencil rule can test the hardness to more than 2H, which fully meets the daily needs; The wear resistance even exceeds the oil paint, the service life and the color matching have obvious advantages; more importantly, the chemical properties are stable, the alcohol resistance and alkali resistance are greatly enhanced compared with the former two, and the technology is the high-grade product in the water-based paint. A few manufacturers at home and abroad monopolize.
Although the water-based paint has the advantages of good environmental protection paint film, the one-component water-based paint has a certain difference between the hardness and the high temperature resistance and the two-component oil paint. For example, it is very easy to be used on the table and the floor. Out of its performance shortcomings. This functional defect led to the development of water-based paint.
The fake two-component water-based paints on the market tend to emerge in an endless stream. Some small paint factories on the market have begun to introduce so-called two-component water-based paints, which is actually an improved paint product, although its hardness has increased a lot. However, it contains a lot of toxic substances like ordinary paint, which is contrary to the original intention of environmentally friendly non-toxic environmental protection and human health.
Direction of development
With the pressure of environmental protection policies, consumers' awareness of environmental protection has been continuously improved; in particular, provinces and municipalities across the country have introduced VOC emission limit standards, encouraging the use of non-solvent-based coatings, which has brought opportunities for the development of environmentally-friendly coatings such as water-based paints. Coatings still occupy a large market share, but water-based paint is a green industry, which is the future direction of paints. Domestic water-based paint leaders are emerging.
It is an indisputable fact that the development of water-based coatings and the market share are increasing year by year, and there is a trend of speeding up. Some enterprises have realized the broad market potential of water-based paints, and have developed, expanded, and expanded the water-based paint market.
Although water-based paints are superior to traditional paints in environmental performance, in terms of physical properties, water-based paint products are difficult to construct, water-resistant, easy to peel, poor in fullness, poor in hardness, etc. Paints have strong hardness and fullness of paint film. High, construction tolerance and other characteristics, is still the preferred coating for many people when decorating. Only physical defects can be solved, even beyond the traditional paint, consumers will be more active in the choice of water-based paint. Enjoying consumption in environmental performance alone In the construction process, the decorative effect can not meet the consumer, the market of water-based paint is still difficult to open. This requires water-based paint manufacturers to make technological innovation in the performance of water-based paint.
In addition, due to the influence of performance, technology and other factors, the construction tolerance of water-based coatings is far worse than that of oil-based wood coatings, which often leads to the poor effect of the final paint film. For consumers, what they actually buy is not paint, but Coating effect after use of paint. The phrase 'three-part paint, seven-point paint' is used to describe water-based paints more appropriately. To achieve the same level of coating effect as oil-based wood coatings, this requires water-based paint companies to pay more attention to Paint construction technology, attaches great importance to the operation training of construction personnel. Dealer friends should consciously improve the professional knowledge and construction process of water-based paint, ensure the high-quality coating effect after the construction of water-based paint, and recommend to consumers to introduce water-based paint in health and environmental protection. Superiority.
classification
Any water-based paint or dispersion medium can be called water-based paint. Water-based paints include water-soluble, water-dilutable, water-dispersible (latex).
Water soluble
Water-soluble type is a water-soluble resin as a film-forming material, represented by polyvinyl alcohol and various modifications thereof, in addition to water-soluble alkyd resin, water-soluble epoxy resin and inorganic polymer water-based resin.
Water-diluted type refers to a lacquer prepared by forming a post-emulsified emulsion as a film-forming material, so that the solvent-based resin is dissolved in an organic solvent, and then the resin is dispersed in water to form an emulsion by strong mechanical stirring with the aid of an emulsifier, which is called post-emulsification. 1. The emulsion is made of water to be diluted during construction.
The water-dispersible type mainly refers to a paint prepared by using a synthetic resin emulsion as a film-forming material. The emulsion refers to a small amount of unsaturated vinyl monomer polymerized under a certain temperature condition in the presence of an emulsifier during mechanical stirring. A dispersion of particles dispersed in water. A paint prepared by adding a small amount of emulsion to a water-soluble resin cannot be called a latex paint. Strictly speaking, a water-diluted paint cannot be called a latex paint, but it is also customarily classified as a latex. paint.
True and false
1, the true two-component water-based paint, whether it is the main agent or the curing agent, basically can not smell the smell after opening the can or only a very slight smell;
2, the real two-component water-based paint is diluted with clean tap water, if you need special thinner or alcohol-based substances to dilute it must not be;
3, two-component water-based paint is also a non-hazardous chemical and the fake two-component is often a flammable dangerous goods;
4, look at the environmental protection index: whether it contains benzene, heavy metals and high levels of VOC and other toxic substances
product Overview
Type: Ultra-durable water-based two-component polyurethane varnish
Ingredients: Main agent: waterborne polyurethane synthetic resin, water
Hardener: waterborne polyurethane synthetic resin, additives.
Drying time: Dry at room temperature: 30 minutes to 1 hour (standard brushing amount: 80~100g/m2)
Standard brushing times: 2 times
Standard painting area: Wood surface with strong water absorption: 2.5~3.2m2 (600g)
Wood surface with low water absorption: 3.7~4.7m2 (600g)
Color: high gloss transparent and matte transparent
Uses: wooden table tops, wooden floor coverings, composite wood floors, wooden stairs, wooden furniture and other indoor and outdoor wood products.
Product specialty
◎High environmental varnish. It is a water-based varnish. High environmental protection, low odor, no danger during operation, and no strong irritating odor.
◎The coating film has good heat resistance, abrasion resistance and chemical corrosion resistance. It has almost the same coating film performance as solvent-based polyurethane varnish, and can maintain the tough coating effect for a long time.
◎Strong heat resistance can be applied to the tabletop to place the boiling water teapot (that is, it can withstand 100 °C temperature), and it can also exert its strong scratch resistance coating on the floor.
◎It is a non-yellowing polyurethane varnish. It will not yellow when exposed to ultraviolet light and visible light. It will not yellow when applied on white surface.
◎ With anti-slip function, it is also suitable for painting stairs and corridors.
Application skills
As more and more water-based paints come into contact with everyone's life, I think everyone will not be familiar with water-based paints. Here are some tips for using water-based paints. I hope to bring you help.
1, waterborne wood coating type and application technology
Through the analysis of the sales of waterborne wood lacquer products on the market, the application techniques for analyzing waterborne wood lacquers according to the variety of base materials are roughly as follows:
1 acrylate type: Among them are styrene-acrylic emulsion, acrylate (modified) emulsion, suitable for primer, matte finish. The coating made by this base material has relatively low cost, hardness, and is not easy to produce shrinkage cavities, but Poor film forming performance, poor gloss, not suitable for high gloss paint. Poor wear resistance, difficult to defoam, generally mixed use; 2 polyurethane dispersion: including aromatic and aliphatic polyurethane dispersion, the latter is excellent in yellowing resistance, More suitable for outdoor. They have good film-forming properties, high self-crosslinking gloss, good wear resistance, and are not easy to produce bubbles and shrinkage holes. But the hardness is generally high, the price is more expensive, suitable for bright finish, floor paint 3; Acrylic modified polyurethane dispersion: including a mixture of aromatic, aliphatic polyurethane and acrylate dispersion, both of the advantages of the above two types, the cost is relatively moderate, can be self-crosslinking can also be used in two-component systems, Good hardness, fast drying, wear resistance, good chemical resistance, low yellowing or yellowing, suitable for bright matt paint, primer, outdoor paint, etc.
4 Water-based urethane oil: It is a single component, similar to oily urethane oil, redox drying type. It needs to add drier when filming. It has quick drying, good gloss, good hardness, wear resistance and good water resistance. It is suitable for doing. Bright surface, floor paint; 5 water-based two-component polyurethane: one component is a polyurethane dispersion with -OH; two components are aqueous curing agents, mainly aliphatic. The two components are mixed and applied, The reaction can significantly improve the water resistance, hardness, fullness, and gloss. The overall performance is good, the coating is not easy to yellow, especially suitable for outdoor coating.
2, product technology status
From the perspective of packaging, the waterborne wood coatings on the market are divided into single components and two components, of which the single component occupies the vast majority; from the source of supply, there are imported products, and there are products produced by foreign brands in China. Domestic manufacturers develop and produce their own products. Among them, the former two are mostly, the latter has a small sales share. Through the analysis and testing of foreign brands, joint venture brands and domestic products, the performance of their products is as follows.
1 product appearance: milky white, yellowish, also has a reddish viscous shape;
2 solid content: generally 30% ~ 45%, much lower than the solvent type;
3 water resistance: aliphatic polyurethane dispersion, waterborne urethane oil is much better than aromatic / acrylic emulsion type;
4 alcohol resistance: the trend is basically the same as water resistance;
5 Hardness: the lowest acrylic emulsion type, followed by the aromatic aromatic polyurethane, the aliphatic polyurethane dispersion and its two-component polyurethane. The urethane oil is the highest, and its hardness will gradually increase with time, especially the double The cross-linking type of the component. However, the hardness increases slowly and is not as good as the solvent type. The hardness of the pencil can reach H;
6 Gloss: It is difficult to achieve the gloss of solvent-based wood coatings, which is generally about 20% lower. Among them, the two components are higher, while the urethane oil, the polyurethane dispersion is the second, and the acrylic emulsion type is the lowest;
7 fullness: due to the influence of solid content, the difference is large, combined with its low solid content, poor fullness, the higher the solid content, the better the fullness, the two-component cross-linking type is better than the single component, acrylic emulsion type Poor
8 Abrasion resistance: the best combination of urethane oil and two-component cross-linking type, followed by polyurethane dispersion, and again acrylic emulsion type;
3, application technology of waterborne polyurethane paint
As a new type of green environmental protection product, waterborne polyurethane paint has only entered the Chinese market in recent years. Its biggest advantage is that it solves the fullness, feel and hardness of domestic painters from the application technology. Heat resistant, scalding, alcohol resistant, water resistant, and stain resistant to paint film;
Breaking through the weakness of waterborne wood lacquer; and waterborne polyurethane lacquer is not easy to produce bubbles during construction, easy to be sanded, not susceptible to temperature and humidity, and laid a solid foundation for comprehensively solving the market application of waterborne wood lacquer.
Water-based paint development trend
Manufacturing is our advantaged industry. We must implement 'Made in China 2025', adhere to innovation-driven, intelligent transformation, strengthen foundation, green development, and accelerate the transition from manufacturing power to manufacturing power. Focusing on the strategic goal of manufacturing a strong country, "Made in China 2025" It will vigorously promote breakthrough development in key areas, including ten major areas such as new materials represented by water-based paints.
Water paint, a new environmentally friendly material with water as a thinner, ultra-low emission. Water paint instead of paint can effectively reduce the VOC content in the atmosphere, thereby improving the haze weather. Therefore, the promotion of water paint is also the mainstream direction of the paint industry. More people in the industry strongly said that China's water paint era has taken the "China Made 2025" policy to the east.