Automotive OEM (original equipment manufacturer) intermediate coat with high solid content and low viscosity and preparation method of intermediate coat

Abstract

The invention mainly relates to the field of coatings, in particular to an automotive OEM (original equipment manufacturer) intermediate coat with high solid content and low viscosity and a preparation method of the intermediate coat. The intermediate coat comprises raw materials in percentage by mass as follows: 25%-35% of polyester resin, 5%-12% of anti-sagging resin, 15%-25% of rutile titanium dioxide, 0-2% of hollow glass microspheres, 12%-18% of superfine precipitated barium sulfate, 1%-3% of a dispersing agent, 0.1%-0.3% of white carbon black, 0.1%-0.3% of an organosilicon leveling agent, 0.3%-0.6% of an acrylate leveling agent, 0.2%-0.5% of a surfactant, 0-2% of an anti-settling agent, 0-4% of cyclohexanone, 3%-5% of ethylene glycol monoethyl ether acetate, 0.05%-0.2% of carbon black, 20%-28% of butylated amino resin and 2%-4% of partial methylated amino resin. The intermediate coat is low in applicable viscosity, good in appearance, economical and environment-friendly and has high content of applicable solids.

Description

Technical field [0001] The present invention mainly relates to the field of coatings, and in particular to a high solid content and low viscosity automobile OEM mid-coat coating and a preparation method thereof. Background technique [0002] In 2015, in accordance with the "Ambient Air Quality Standards" (GB3095-2012), the proportion of days meeting the standards in 338 cities at prefecture level and above (including prefectures, prefectures, and leagues) across the country ranged from 5.5% to 100%, with an average of 72.7%. The average proportion of days exceeding the standard is 27.3%, of which 18.7% are mild pollution, 5.2% are moderate pollution, 2.7% are severe pollution, and 0.7% are severe pollution. The main pollutant is volatile organic compounds, which are an important cause of haze. carrier, so it is imperative to improve the quality of the air environment. [0003] The coating process of the automobile manufacturing industry is a process of using volatile organi...

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Problems solved by technology

[0006] Due to many problems in water-based coatings, such as high requirements for supporting equipment and large investment, large increase in raw material costs, slow drying speed, obvious influence of temperature and humidity on construction conditions, insufficient appearance and development, and many other factors, the application range of powder coatings and PVC coatings is relatively narrow. , so it is particularly important to develop high-solid and low-viscosity coatings

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