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Founded in 2000, Suzhou Shengjie is a high-tech company founded by a group of highly-skilled “turtle†personnel. Specialized in the research and development of high-end specialty epoxy resins and curing agents. At the beginning of their creation, they aimed at the prospect of international industry technology from a high starting point and independently developed products that were monopolized by a small number of foreign giants. From the beginning, no one knows, no one trusts, and to win the trust of users with excellent products, gradually replace imports as multinational competitors, and slowly stand on the high end of technology. The company's market representative Zhang Gong said: The traditional concept of epoxy resin for heavy anti-corrosion is liquid, while the liquid resin coating as a solvent product, the pollution and waste, when the domestic solid resin as a powder coating only For medium and low-end sites, a small amount of high-end high-value-added applications are monopolized by foreign companies; Suzhou Shengjie begins by developing normal-temperature and even low-temperature, fast-curing curing agents and gradually solves the problem of leveling and room temperature that must be solved when solid resins are used as powders. Curing problems, especially the breakthrough in low temperature curing. The product has excellent compatibility with the resin in the extrusion or hot melt mixing process. After curing, the coating surface is smooth and flat and the overall performance is superior. This is widely used to catalyze the preparation of thin-coated decorative or functional epoxy powder coatings from dicyandiamide-type curing systems.
Suzhou Shengjie's products are environmentally friendly and green, with excellent features and extensive adaptability, which is not inferior to imported products. Their special series of amine curing agents and resins, graded HTP, are widely used for heavy-duty, heat-stabilized or ultra-flexible functional powder coatings. They are also widely used in EMC (electronics) Plastic), electronic packaging and other high-tech fields. Among them, HTP-36 can be used as a catalyst for thin powder coating curing or other functional powder coatings on wood. It has the characteristics of fast reaction speed, low required temperature, excellent chemical resistance and electrical properties, and it has been used by large companies in the world. China's sole proprietorships, joint ventures, and high-tech companies in China are widely used, and they are also exported to Europe, America and the Middle East. Speaking of the use of wood spraying, Dr. Lee, a technologist at the company, said that the application is closely related to the people's life. Although it is not the mysterious high-tech field that people usually think, it can't cover up its technical content. The powder coating is sprayed on the wooden board in order to close the enclosed formaldehyde and achieve the environmental protection of the sheet. The characteristics of the wood board are high adsorption force, small specific gravity, low density and porosity, so the requirements for spraying materials are very high. First of all, a low temperature operation must be realized because a high-temperature wood board will be deformed or even burned. This is a big test for the leveling property of solid resins. Secondly, as the spraying operation progresses, it must be able to adapt well to changes in the volume and the adsorption force of wood. . Few products in the international community can do this, but St. Jay's HTP does a good job of this.
Its HTP-305 can be used for steel rebar, wire rope and pipeline anti-corrosion powder coating, its ultra-high flexibility and anti-corrosion performance, the industry believes that it exceeds similar foreign products, such as Dow DEH-84, Shell P-202, and Henry. Siman 3082 and so on. A series of products such as HTP-6011 for ultra-high performance powder coatings are specially formulated and well-produced with excellent leveling and good coating properties, in particular, impact resistance, flexibility, and corrosion resistance. Rational use of agents can achieve unparalleled superior performance. The most important indicators of solid powder coatings are anti-corrosion and leveling, but this is contradictory. “Leveling†requires fast flow in a short period of time to make the surface of the coated object smooth and smooth; “corrosion protection†requires a high degree of correlation, just like a “net†with a dense mesh, to protect coated objects, but this If the "net" is too dense, the leveling will become worse. The reason why large foreign companies are used well and sold at a high price is to find a balance between the two. And Suzhou Shengjie has also achieved success in this area. They design entrances from molecular weights that are rarely heard in China, so that the distribution of molecular weight can be applied to different indicators, and fundamentally meet applicable requirements.
Ordinary steel spraying, the requirements for powder coatings are not very high, but for the application of the bridge cable shuttle, concrete reinforcement, the difficulty is much greater. A person in the international epoxy resin anti-corrosion circle said that first of all, it must have good flexibility, and that the coated object should not be damaged when it is bent at 180°C; secondly, it must be bonded to both steel and concrete. Sex, otherwise it will not only affect preservation but also affect structural stability. Suzhou Shengjie had previously provided this product for several bridges in China until the Hangzhou Bay Cross-sea Bridge. Just as people cheered for the completion of the cross-sea bridge and hoped for the bridge to leave, news of the construction of the Beijing-Shanghai high-speed railway came. The completion of the high-speed rail is different from that of the traditional railroad track structure. It is an integrated structure of steel rails and sleepers. The foundation contains a large number of steel bars. Corrosion prevention of steel bars is directly related to roadbed safety. If the quality of the powder coating cannot meet the corresponding requirements, so that the steel bar and the concrete are “shelled off†and conductive, the subgrade will lose the support of the steel bar and cause serious electrical accidents. This kind of anticorrosion is not as good as it is. The provision of this key anti-corrosion material is still borne by solid epoxy powder coating. It is the Suzhou Shengjie Company and the Jiaotong University that carry out the joint research. It is currently in full swing to make the final push and is expected to pass the national acceptance soon.
The high-end application of solid powder coatings in China is maturing
On May 1, 2008, Hangzhou Bay Cross-sea Bridge was officially opened to traffic. The longest bridge in the world is 36 kilometers long. The special hydrological conditions and sea conditions in Hangzhou Bay determine that preservation is an important guarantee for achieving its 100-year design life. In addition to anti-corrosion of bridge steel pipe piles, anti-corrosion of cable stayed cables is also a key link. Because the bridge's ability to withstand the strong winds of class 12, it comes from this dense steel cable. The anti-corrosion of steel bridges with such a length of cross-sea bridges must reach a design life of 100 years, and the requirements for anti-corrosion materials are very high. Cable coating thickness is generally only 0.15 ~ 0.30mm, the use of solid epoxy resin powder to electrostatic spraying process: the steel cable surface rust, hair and other treatment after heating to 230 degrees Celsius temperature, and then the charged ring Oxygen resin powder is sprayed onto the surface of the steel cable, and the powder particles are adsorbed on the surface due to the electric charge, and after being melt-bonded and cured with certain curing, a complete and continuous film protective layer covering the entire surface is formed. As a supplier of special epoxy resin powder coating for anti-corrosion steel cable in Hangzhou Bay Cross-sea Bridge, Suzhou Shengjie Special Resin Co. This move shows once again that the high-end applications of solid epoxy powder coatings in China are maturing.