Water-based polyester resin for amino baking coating and synthesis device of water-based polyester resin

Abstract

The invention discloses water-based polyester resin for an amino baking coating. The water-based polyester resin is prepared from the following raw materials in parts by weight: neopentyl glycol, diethylene glycol, trimethylolpropane, glycidyl tertiary carbonate, 1,4-cyclohexane dicarboxylic acid, phthalic anhydride, hexahydrophthalic anhydride, isophthalic acid, 5-sulfoisophthalic acid monosodiumsalt, 1,4-butanediol-2-sodium sulfonate, xylene, a catalyst, a neutralizer, a cosolvent, a solvent and deionized water. The invention further discloses a synthesis device for the water-based polyester resin for the amino baking coating. The monomer of the water-based polyester resin for the amino baking coating prepared by the preparation method has good performance, and performance of the aminobaking coating prepared from the water-based polyester resin provided by the invention is superior to performance of amino baking coatings prepared from common water-based polyester resin in the market. According to the synthesis method for the water-based polyester resin for the amino baking coating, heating rods and a spiral heating pipe can be simultaneously used for heating from inside and outside, heating efficiency is improved, and production efficiency of the whole water-based polyester resin is improved.

Description

technical field [0001] The invention belongs to the technical field of polyester resins, and in particular relates to a water-based polyester resin for amino baking varnish and a synthesis device thereof. Background technique [0002] Since water-based polyester resins use water as a solvent and have low toxicity, water-based polyester resins have been used more and more widely. However, at present, water-based polyester resins still have poor curing conditions, low viscosity, poor water resistance and gasoline resistance. As for the poor problem, amino baking varnishes are attracting more and more attention at present, and their applications are becoming more and more extensive. There are also water-based polyester resins applied to amino baking varnishes on the market, but the applications are less, and amino baking varnishes are obtained. The performance is not very good. In order to expand the application range of water-based polyester resins and obtain amino baking varn...

AI Technical Summary

Problems solved by technology

[0002] Since water-based polyester resins use water as a solvent and have low toxicity, water-based polyester resins have been used more and more widely. However, at present, water-based polyester resins still have poor curing conditions, low viscosity, poor water resistance and gasoline resistance. As for the poor problem, amino baking varnishes are attracting more and more attention at present, and their applications are becoming more and more extensive. There are also water-based polyester resins applied to amino baking varnishes on the market, but the applications are less, and amino baking varnishes are obtained. The performance is not very good. In order to expand the application range of water-based polyester resins and obtain amino baking varnishes with excellent performance, it is necessary to develop a water-based polyester resin for amino baking varnishes. The traditional synthesis reactor only starts from External heating, the heating speed is slow, which greatly reduces the synthesis efficiency of water-based polyester resin, and after the synthesis, it needs to be transferred to filter, which is troublesome to operate

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