Composition for underbody coating, method for forming underbody coat and manufacturing method of vehicle having underbody coat

摘要

Problem to be solved: to provide a polyvinyl chloride based underbody composition composition in which the heat treatment of the surface coating composition of the vehicle body is heated in a temperature of 40 to 70 ° C. before curing, and the coating is applied with a thick film, and the formation of slip and slip is suppressed.The objective of the present invention is to provide a surface treated calcium carbonate having a BET specific surface area greater than 15 mm2 / G so that the ratio of the amount of plasticizer to the content of the plasticizer relative to the content of the plasticizer in the environment of 55 A polyvinyl chloride undercoat composition with specific gravity of 1.1 or less was achieved.Diagram