In the current chemical industry of waterborne coatings, it has shown outstanding advantages and played an important role. As for the significance and problems of silane hydrolysis, hydrolysis step is a necessary process in the application of traditional silane. However, the storage period of silane that needs to be hydrolyzed in advance is not too long. It usually takes about a week, which will cause great obstacles to the production line. For example, the bath solution needs to be tested and replaced frequently, for example, the paint is not used in time due to short opening time, which causes waste, or it is made into two-component, which affects the stability of quality control.
Now, coupling agents directly used without hydrolysis can help solve many problems caused by silane hydrolysis. (In general, if the former process is involved in synthesis, it is resin modification, while if it is added in the later process, it is auxiliary). KRN80 series water-based silane coupling agent has been put on the market for many years. It has a mature product system architecture to solve the problems encountered in the use of silane for new and old customers, and its performance is beautiful. KRN80 series water-based silane coupling agents are widely used in the metal surface treatment industry. Silanes play a role of ceramic passivation in the metal surface treatment industry. Through ceramic passivation, a layer of silane film is formed. 1. It can seal and protect the metal easy to rust. 2. Through the surface modification of the substrate, the adhesion of the later coating process is greatly improved. It forms a transparent silane film, which can be used as the varnish for texture treatment of metal surface.
For water-based paint additives and water-based coatings, adhesion problems are generally encountered. The same formulation system needs to correspond to different substrates. In case of poor adhesion, silane is usually preferred as the coupling agent. The adhesion between metal, glass, ceramic and other inorganic materials and organic coatings can be solved by silane coupling. It is especially used in baking varnish system. In the self drying system, the reaction of silane will be slower than that of organic paint system, so it takes 7 days to verify the effect. However, engineers often test the performance after the meter is dry, which is unrealistic. The principle of water-based silane base material primer is similar to that of metal surface pretreatment. It is to make a layer of silane coating on the base material, which can be implemented through immersion coating, spraying, brushing and other processes. The substrate is not limited to metal, but also can be glass, ceramics, plastics, and even wood. The corresponding industries can also have plastic spraying, glass primer, ceramic primer, etc.
