A kind of anti-stone chip coating paint for automobile and preparation method thereof

Abstract

The invention belongs to the technical field of automobile oil paint, and in particular relates to stone chip resistant middle coating paint for automobiles and a preparation method thereof. The stone chip resistant middle coating paint for the automobile is prepared from the following components in parts by weight: 20 to 35 parts of rosin modified polyacrylate, 10 to 15 parts of rosin modified phenolic resin, 10 to 15 parts of toughening epoxy resin, 15 to 20 parts of filler, 0.5 to 1.5 parts of anti-settling agent, 0.5 to 1 part of dispersant, 0.3 to 0.8 part of leveling agent, 0.1 to 1 part of antifoaming agent, and the balance of solvent. The stone chip resistant middle coating paint prepared by the invention is excellent in adhesive force, good in flexibility, high in hardness, and good in acid and alkali resistance, weather resistance and elasticity, and the stone chip resistance is superior to level 3; the preparation method of the stone chip resistant middle coating paint disclosed by the invention is simple, the operation is simple, raw materials are easy to get, the cost is low, the pollution to environment is little, and industrial production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of automobile paints, and in particular relates to an automobile stone chip-resistant mid-coat paint and a preparation method thereof. Background technique [0002] The coating of metal body (mainly steel plate) usually includes electrophoretic primer, middle coat, color topcoat and finish varnish, etc. At present, the coatings for car bodies are all liquid coatings, except for electrophoretic coatings which are water-based coatings, the others are mainly solvent-based coatings. [0003] As an outdoor means of transportation, the car is always likely to be attacked by various wind, sand and hard objects, and it can protect the primer coating and substrate when the car is collided by various external factors on the surface of the car during fast driving. Avoid loss, thereby improving the durability of the primer coating, and can improve the flatness of the car body surface and the primer coating, provide a g...

AI Technical Summary

Problems solved by technology

However, the intermediate coating film currently produced in China is relatively hard and brittle, and has defects such as poor stone chipping resistance, poor interlayer adhesion, and poor weather resistance. After a period of use, the paint film will peel off. , domestic manufacturers generally use foreign resins and other raw materials, and the selected resins and other raw materials are purchased from abroad. The disadvantages are that the price of raw materials is relatively expensive, the transportation time is long, and the stocking volume is relatively large, which will cause a large amount of materials and funds. Backlogs, even waste, are the basic principles of modern enterprises. Therefore, the current research and development of using domestic raw materials to replace foreign raw materials is an urgent problem to be solved, which has far-reaching significance for the development of automotive intermediate paints

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