Low-temperature curing color coiled material paint and method for preparing same

Abstract

The invention relates to a paint composition, in particular to a low-temperature curing paint used for manufacturing color steel plates and a method for preparing the same. The method comprises the following steps: adding 45 to 60 weight percent of saturated polyester resin, 3 to 5 weight percent of fully-methylated amino resin and 3 to 5 weight percent of partially-methylated amino resin into a reaction kettle; while stirring, adding 3 to 5 weight percent of propylene glycol ether acetate, 2 to 5 weight percent of binary acid dimethyl ester, 2 to 0.5 weight percent of closed cooling catalyst, 0.2 to 0.5 weight percent of open cooling catalyst, 5 to 10 weight percent of trimethyl benzene solvent to the mixture; after stirring the mixture evenly, adding 0.3 to 0.8 weight percent of dispersant to the mixture, and then adding 20 to 40 weight percent of filling pigment and 0.3 to 0.8 weight percent of wax powder while stirring; and after the mixture is dispersed evenly, performing sanding in a sand mill, and then performing paint and color mixing process to obtain the finished product, namely the low-temperature curing color coiled material paint. The method can solve the problems that the prior high-temperature baking curing paint has high curing temperature to cause energy sources waste.

Description

technical field [0001] The invention relates to a coating composition, in particular to a low-temperature curing coating for manufacturing colored steel plates and a preparation method thereof. Background technique [0002] At present, the domestic color steel plate is developing very fast. According to incomplete statistics, there are nearly 200 domestic color steel plate production lines, with a production capacity of 15 million tons / year and an actual output of 8 million tons / year. The raw material color coil coating is a high-temperature baking-curing coating, so it consumes a lot of energy in the production process. The curing temperature of the coating has a direct impact on energy consumption and production costs, while the curing temperature of conventional color coil coatings is 224-241°C, the current domestic color plate production line consumes 25 cubic meters of natural gas per ton of steel plate, and the cost of energy consumption is 100 yuan per ton of steel pl...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned defects, the technical problem to be solved in the present invention is to provide a low-temperature curing color coil coating and its preparation method in view of the high curing temperature of the existing high-temperature baking-curing coating, which causes energy waste.