Solvent-free epoxy coatings for marine applications

As a solvent free epoxy coatings free of volatile organic solvent, a high solids content high performance liquid green paint solvent greatly reduces the possibility of retention, chronic after film formation less volatile substance, the sealed air space Quality assurance is possible. It is currently gaining an increasingly broad prospect in the field of marine applications. Ships are in the marine environment and are often corroded by seawater and oceanic atmospheres, and have high requirements for marine coatings in terms of corrosion resistance. Therefore, researchers in the coatings industry at home and abroad are actively developing new solvent-free epoxy coatings for ships. At present, most of the anti-corrosion coatings in China's submarines and various types of ship cabins use traditional solvent-based coatings. The toxic and harmful organic solvents volatilized by the coatings will directly affect the health of officers and soldiers in fully enclosed ships, which is not conducive to improvement. Fighting power. According to experts from China Epoxy Resin Industry Association, in recent years, major foreign marine coating companies are developing and producing solvent-free epoxy coatings. For example, the world famous coating company Sigma Coatings Co., Ltd. has developed and produced solvent-free marine coating products. Used for anti-corrosion coating protection of ships, submarines, cruisers, aircraft carriers, etc. Among them, Sigmaguard CSF7443, 7475, 7954, 5427 and Other two-component solvent-free epoxy anticorrosive coatings are composed of bisphenol epoxy resin, amine low viscosity curing agent and other additives, which have good anti-corrosion and wear resistance and chemical resistance. It is resistant to dirt, salt spray and impact, and can be used for anti-corrosion coating inside ships. Hempel Haihong - Old-fashioned paint company Hempadur35530 surface ship solvent-free epoxy coating with high solid content, suitable for ship and submarine cabin surface coating, can effectively improve the air quality of the closed cabin and the health of the crew . The new Inergovrd 144 and Interline 154 solvent-free epoxy coatings developed by IP International Paint also have a high solids content and are suitable for surface coating of ships and submarine cabins.

Japan specializes in producing all kinds of civil, military and industrial architectural coatings companies - Japan Kansai Paint Co., Ltd. is also vigorously developing such environmentally friendly coatings. The company's patent application JP11172195 discloses a marine anticorrosive coating which is prepared by using liquid bisphenol A epoxy resin, liquid bisphenol F epoxy resin, alicyclic amine, amide curing agent, filler and pigment. It has good high solids, low temperature curing, anti-corrosion and anti-fouling properties. Japan Kawasaki Steel Corporation invention patent JP63248870 also discloses a heavy anti-corrosion epoxy coating suitable for marine marine use, which uses bisphenol A epoxy resin, alicyclic amine, amide curing agent, talc filler, organic bentonite thixotropic agent Made of pigments, etc., it has excellent anti-corrosion, abrasion resistance and salt spray resistance. Solvent-free coating solids content of generally more than 95%, the construction can be at room temperature or under heating. Broadly speaking, it may comprise powder coatings and radiation-curable coating, the most typical solvent-free two-component epoxy coating. Because the epoxy resin has excellent corrosion resistance, solvent-free epoxy coating on the ship coating process has unique advantages: First, it reaches at least a predetermined number of times the film thickness of the coating, the solids content of the coating up to 95%, the relative painting work time saving, labor saving in terms of shipbuilding and save money. Secondly, its construction safety is high. Because there are a lot of open fire operations in shipbuilding production, it is necessary to avoid open fire operation during painting and construction, or to finish other operations after the test is completed. The use of solvent-free epoxy coatings, because of the small amount of volatile solvents, can greatly reduce the coating process time, and bring safety and convenience to the shipyard production arrangements. In addition, it can also avoid damage caused by volatile organic solvents to construction workers. At present, research institutions such as the China State Shipbuilding Corporation Ship Technology Research Institute, Jiangnan Shipbuilding Group Corporation, Luoyang Institute of ships, the CAS Changchun Institute of Applied Chemistry launched a development solvent-free epoxy coatings that can be used for conventional submarines and surface ships The living cabin and the working cabin improve the air quality of the painted closed compartment and ensure the health of the crew. The development and application of the solvent-free epoxy coating can greatly reduce the environmental pollution of the epoxy coating, reduce the fire hazard of the coating, improve the working efficiency of the shipbuilding, and meet the development needs of international environmentally friendly coatings. Experts from China Epoxy Resin Industry Association said that as a developing country, China is catching up with the world's advanced level, taking the road of sustainable development, avoiding the detours of pollution control, and the government and R&D personnel are paying more and more attention to coatings. Environmental protection issues. Therefore, the development of strict restrictions on VOC in coatings, as well as the greatest reduction in the impact of coatings on the environment, to achieve zero emissions will be the future development direction of environmentally friendly coatings. In the marine coatings, the solventless and water-based coatings will also be the future development direction, while the solvent-free epoxy coatings are more practical under the current conditions. Therefore, we should pay more attention to promoting the use of this environmentally friendly new type in the future. coating.

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