Double-component ground coating matched with ultraviolet (UV) coating for coating notebook computer plastic case

Abstract

The invention discloses a double-component ground coating matched with an ultraviolet (UV) coating for coating a notebook computer plastic case. The double-component ground coating comprises a main agent and a curing agent, wherein the main agent comprises the following components according to weight contents: 10-20% of hydroxylated acrylic resin with low hydroxyl value, 10-20% of hydroxylated acrylic resin with low and medium hydroxyl value, 20-40% of hydroxylated acrylic resin with medium hydroxyl value, 5-15% of cellulose acetate butyrate resin, 0-2% of adhesion promoter, 0.2-0.5% of flatting agent, 0.2-0.5% of defoaming agent, 5-30% of pigment paste and 15-25% of solvent; and the curing agent comprises the following components according to the weight contents: 70-80% of hexamethylene diisocyanate and 20-30% of solvent. The invention further relates to a method for preparing the double-component ground coating. The double-component ground coating is suitable for coating the notebook computer plastic case, has good sealing performance for plastic parts of acrylonitrile butadiene styrene (ABS), polycarbonate (PC), ABS plus PC and the like and can be well combined with UV finish paint.

Description

technical field [0001] The invention relates to a coating, in particular to a two-component primer used for coating plastic shells of notebook computers and matched with UV coatings. The invention also relates to a preparation method of the coating. Background technique [0002] Shell coating is an important part of the notebook computer manufacturing process. It not only provides colorful decoration for the computer, but also protects the plastic material, enhances scratch resistance, wear resistance and durability, so it has attracted the attention and attention of the industry. At present, the notebook computer coating market is dominated by two-component PU coatings that use hydroxyacrylic resins and diisocyanates and UV-curable UV coatings. Among them, UV coatings have become the leading market for their excellent scratch resistance, abrasion resistance, electrical conductivity, and weather resistance. an integral part of the market. Most plastic parts that need to be ...

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Problems solved by technology

[0003]Compared with the applicant's previous application, the name is a kind of UV-curable varnish coating, which is used as a base coating for color TV shell coating, and the patent number is ZL Invention patent of 200610037316.3, the two-component primer does not contain halogen, the paint film is more stable, the resistance to heat and humidity is better, and it is less prone to paint peeling and cracking, but there are certain limitations in coating construction

The drying time is long, which increases the cost and consumes more energy, and seriously affects the painting production efficiency. In addition, the plastic parts coated with the two-component primer cannot be placed for a long time, and the UV coating must be painted within a certain period of time, otherwise it will be damaged. Poor adhesion between the UV and the primer layer, or even no adhesion in severe cases, thus reducing the operability of coating production and also affecting production efficiency

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