In fact, epoxy resin coatings are very popular in the market because of their beautiful and practical characteristics. How much do you know about them? Know what the paint is?
Epoxy resin is a general term for a class of organic compounds. When the organic compound contains two or more epoxy groups, we can turn these substances into epoxy resins.
Generally speaking, the relative molecular mass of the resin is relatively low. Epoxy group belongs to active molecular structure, and it is easy to crosslink with curing agent to form stable three-way network structure high polymer. In this state, epoxy. Resin physical and chemical properties are improved, easy to metal and non- The surface of the metal material forms a qiang force bond, and has a small deformation rate, stable dimensions, and excellent dielectric properties. It can be used in the production of resin coatings and the development of other bonding and impregnation materials.
2. Production process
According to different application conditions, the production process of Jinan epoxy resin coating is different. The preparation method pointed out in this article is to produce separately packaged coating materials according to the two components of A and B. The production process is simple, the economic benefit is good, and no unnecessary harm is generated. The material meets the requirements of the green production concept. The specific production process is as follows:
(1) Production of component A: Choose a good type of epoxy resin E20. The resin is dissolved with a solvent (acetone and absolute ethanol ratio is 4: after the solution is dissolved, add lithopone, titanium dioxide and a small amount of phthalocyanine blue. Packed after grinding by sand mill.
(2) Production of component B: According to the operational requirements, a preparation instrument composed of reaction kettle, cooler, storage tank, etc. is set. The preparation instrument adopts standardized measurement and automatic detection system to improve production accuracy. In the preparation, the dimer acid and diethylenetriamine were put into the reaction axe, and the stirrer was heated to 140° C. for one hour, and the heating was continued. The condensation reaction started-water was formed. The generated water evaporates continuously and is collected in the water tank through the cooler until the condensation reaction is completed, no more water is generated, and the weight of the generated water is measured.
Then continue to heat up, start vacuum distillation, and distill out excess diethylenetriamine to collect in the storage tank. After the distillation is completed, the temperature is reduced to below 80°C and the weight of diethylenetriamine is metered out. For the constant calculation of materials, the total amount of feed minus the amount of effluent minus the amount of diethylenetriamine distilled out, the rest is the solid content. After the product low molecular weight polyamide grease (curing agent) must add absolute ethanol and a small amount of acetone for the release. 50% solid content filter packaging.