Preparation and Properties of Coil Coating for Bonding TPO Waterproofing Membranes and Metal Plate
A kind of coil coating which is used for the adhesion between waterproof coil TPO and metal plate has been developed.The main factors affecting the comprehensive properties of coated metal plate are investigated,including polyester resin,curing agent,chlorinated polyolefin and coating process.The results show that the factors having great influence on the comprehensive properties of coated metal sheet are the relative molecular weight,hydroxyl value and glass transition temperature of polyester resin.The optimal properties are obtained when using C1223 with Tg of 30℃ as the first polyester resi,the ratio of curing agent A/CYMEL303 is 6∶4,the dosage of CPP is 5％,the substrate temperature is from 224 to 241℃,and the film thickness is about 16 μm.In addition,there are no peeling and bulge on the surface of film and TPO film.The bonding strength is high and the adhesion is excellent.The overall performance of the coated metal plate can meet the actual requirements of customers.
万方数据
维普
