Analysis on the application of waterborne polyurethane (WPU) in coatings Waterborne polyurethane is used in water based wood coatings, which is expected to obtain excellent film hardness, heat resistance and dielectric properties, and good film-forming properties. The higher the degree of microphase separation of aqueous polyurethane,the greater the difference of softening temperature, the better the film formation and heat resistance, but for wood coatings, film hardness and resistance to media is also an important measure of the performance of the index. In order to improve the dielectric resistance and the hardness of the coating, it is necessary to increase the crosslinking density and increase the proportion of the rigid segments in the molecular segments, it certainly will reduce the flexibility and relative molecular mass of the waterborne polyurethane molecules. These are not conducive to the micro phase separation, the mixing degree increased,unfavorable to the film. The research route is of high hardness, low molecular weight (less than 1000) polyester polyurethane preparation to obtain a high degree of crosslinking, heat resistance, chemical resistance and film hardness.  At the same time, with good flexibility, high molecular weight (more than 2000) linear polyester preparation or low branching polyurethane, to improve the degree of microphase separation, the coating has excellent film-forming properties, reduce film-forming agent dosage, improve the film hardness rise velocity. And through these 2 kinds of polyurethane copolymerization to obtain comprehensive performance. For more information about water based polyurethane wood coating, please feel free to contact sales@sinogracechem.com

The exterior wall stone paint of the building is really natural, after the paint is dry,it is like a real stone, and the colors are warm and natural, and the color is fresh and nice. Perhaps a lot of friends, for this anti-stone coating is not very understanding, so, will inevitably feel very strange, then this material really have these advantages? In fact, this anti-stone coating not only has these advantages,but also have other advantages. If you are interested, may wish to take a look at the following article. 1.With a very strong ability to beautify the strong. As we all know, this facade really stone paint is called imitation stone paint. This coating production process, due to the addition of a variety of additives, making the paint has a variety of practical functions, such as, adding a color stone, so that after the paint in the paint, the formation of a marble like the general color , Not only realistic, but also replace the stone material, not only to greatly reduce the cost of construction, but also to beautify the role of building facades, elegant, noble, is an ideal external decorative paint. 2.The external walls of the building is really strong stone paint the use of capacity. The facades are painted directly on the surface of the building, so it is very easy for the paint to circulate in the market, and the people who use it are increasing. Whether it is used in the limestone building surface, or used in the marble surface, cement building surface and so can be universal, without any restrictions. 3.Comprehensive and powerful. As a result of its wide application, it can be used for a long time on different building surfaces. Of course,his coating by adding a variety of additives, and to give this material more comprehensive performance. Among them, this coating is known for non-toxic environmental protection capabilities, are generally selected green water-based paint-based, therefore, people's health has no effect, has passed the national environmental testing certification standards. In addition, this paint once painted on the building, then the color is fresh all the year round, will not cause fading phenomenon, and can extend the life of the building surface, you can use for more than a few years.

Some of the traditional glue in the adhesion of a great advantage is good adhesion, and the efficiency is very low, the most important thing is relatively low cost, most are someorganic materials. Relatively speaking,the biggest advantage of water-based adhesive is green, the traditional glue is inorganic materials, so it is not very environmentally friendly, pollution is relatively large, water-based adhesive is the best alternative in the future. Water-based adhesive in a long time after the bond strength is higher than ordinary glue, coating performance is also very good, can replace the existing solvent, film effect is very good, The  effect on some dry laminating machine application is very good, can save a lot of cost, basically can reduce the cost of three percent of the birthday. Compared to the traditional glue, water-based adhesivealso has a good gloss, andtransparency will be much higher, patience is also very strong. Water-based adhesive applications in the green industry development opportunities are still great , can improve the production environment and the quality of products we use. Product quality and green health is a very importantindicator, we should strengthen this performance. Ensuring the health of production staff is very important. It has a great help for the future development of the industry.

Waterborne polyurethanes are mostly milky white. The whole process of waterborne polyurethane can be divided into two stages. The first stage is pre-stepwise polymerization, that is, the oligomeric diol, the chain extender, the water-based monomer and the diisocyanate are progressively polymerized through the solution to produce an aqueous polyurethane prepolymer having a molecular mass of the order of 1000. The second stage is neutralized after the prepolymer is dispersed in water. Because of its environmental role, although the history of waterborne PU is not long ,the development is very rapid. Water based polyurethane, includingpolyurethane aqueous solution, water dispersion and water emulsion three, for the binary colloidal system, polyurethane (PU) particles dispersed in a continuous water phase, also known as water-based PU or waterborne PU.