Production process of water-resistant coating composition for buses

Abstract

The invention provides a production process of a water-resistant coating composition for buses. A coating is prepared by using specific compositions in specific proportion; modified polyurethane resin emulsion and modified diphenylmethane diisocyanate are put into a reaction kettle to mix, wherein the mixing time is 1-2h, the mixing temperature is 50-60 DEG C, and the mixing speed is 120-140r / min; after mixing is completed, a dispersant is added, the obtained mixture continues to be stirred for 30 min, trimethyl hexamethylene diamine and titanium dioxide are added, and the obtained mixture is subjected to a constant-temperature reaction for 1 hour; and benzoyl chloride is added, so that modified diphenylmethane diisocyanate is obtained. In the process of preparing the modified polyurethane resin emulsion, the stirring speed is 400 RPM. An effective waterproof effect is achieved by using unique formula compositions; and a water-resistant coating prepared by using the production process disclosed by the invention can effectively prevent water from infiltrating into the inner end of a bus duct, so that the occurrence of bus explosion caused by electrical short circuit is avoided, thereby improving the safety performance.

Description

technical field [0001] The invention relates to a water-resistant paint, in particular to a production process of a water-resistant paint composition for a busbar. Background technique [0002] With the increase of my country's infrastructure construction, a large number of constructions such as railways, highways, and urban subways, the amount of waterproofing projects is huge. In these construction projects, modern high-rise buildings and large workshops require huge electric energy, and in the face of the huge loads requiring hundreds of thousands of amperes of strong current, safe and reliable conduction equipment must be selected. The busway is a power distribution device for efficient current transmission, especially to meet the needs of economical and reasonable wiring of increasingly taller buildings and large-scale factories. Polyurethane waterproof coating is the most commonly used waterproof coating, but the bus duct is a kind of electrical equipment, which does ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem of insufficient water resistance of existing coatings, the present invention provides a production process for coatings with excellent water resistance. The coating uses a specific composition and ratio, and the modified polyurethane resin emulsion and modified Put the methane diisocyanate into the reaction kettle and mix, the mixing time is 1-2h, the mixing temperature is 50-60 degrees, the mixing speed is 120-140r / min, after the mixing is completed, add the dispersant, continue to stir for 30min, and then add trimethyl Hexamethylenediamine and titanium dioxide were reacted at constant temperature for 1 hour, and then benzoyl chloride was added to obtain modified diphenylmethane diisocyanate