Fire resistant water-based self-adhesion coating

Abstract

The invention discloses a high-temperature resistance water-based self-adhering paint, which comprises the following parts: 10-80% main agent, which contains alkaline metal silicate from one of quaternary amine, tertiary amine and silicate of guanidine (23.5- 46.3% silicate or 67.8-83.9% phosphate); 26.8-45.1% solidifier, which concludes metal oxide, aluminium hydroxide, magnesium fluosilicate, magnesium borate, zinc borate, magnesium phosphate or potassium phosphate; 16.1-32.2% filler, which contains silica, alumina, mullite, boron nitride or mica.

Description

technical field [0001] The invention relates to a high-temperature-resistant water-based self-adhesive coating, in particular to a water-based self-adhesive coating used for high-temperature-resistant electrical steel self-adhesive coatings. Background technique [0002] Self-adhesive coating is a novel electrical steel coating. It does not use traditional welding or riveting to fix the chips of the iron core, but uses the coating on the surface of the electrical steel sheet to bond the chips to each other. together. [0003] German company Thyssen EBG has developed a steel plate with a solvent-based self-adhesive coating, which has the functions of insulation, corrosion resistance, improving punchability and mutual adhesion. In this way, the harmful gas generated during welding is avoided, and the connection force between the sheets is also very large. This product can be used for the long stator core of maglev trains. [0004] Kawasaki Steel has proposed a water-based t...

AI Technical Summary

Problems solved by technology

[0005] China Invention Patent Application No. 200410017997.8 discloses a water-based environmentally friendly self-adhesive coating with simpler structure and superior performance, which can be baked with an open flame, and overcomes the unevenness, opacity, peeling strength and shear of the water-based self-adhesive coating. The shear strength is poor and must be prepared before coating, and the storage time is short, which causes troubles for construction

[0006] Through the investigation of electrical steel products at home and abroad, and the query of patents and documents, it can be found that although self-adhesive coated electrical steel has been developed at home and abroad, the self-adhesive coatings of these varieties are all organic coatings. That is to say, the main components of the coating are organic polymers, which cannot withstand high temperatures, such as not being able to stay above 300°C for a long time, so stress relief annealing cannot be performed, and it is also difficult to perform casting aluminum processing, because the melting point of aluminum is 660°C. The organic self-adhesive coating has been destroyed at this temperature