Preparation method of high performance heat-dissipating coating for tablet personal computer

Abstract

The invention discloses a preparation method of a high performance heat-dissipating coating for a tablet personal computer. The preparation method comprises the following steps: I, adding waterborne polyurethane resin and low hydroxy acrylic resin into a reaction kettle to react for 25-35 minute at 115-125 DEG C; then adding a mixed rock powder, modified fillers and a microspherical emulsion; andfinally, adding nano titanium dioxide and a silane coupling agent KH550 to be stirred for 25-35 minutes at the stirring rotating speed of 125-135 r/min to obtain a mixture A. The waterborne polyurethane resin has excellent weather resistance and is coordinated with the low hydroxy acrylic resin. The mixed rock powder is prepared by mixing intrusive rocks and andesite. The intrusive rocks are formed from molten magma which is injected into a construction cavity formed in the same term under orogenesis.

Description

technical field [0001] The invention relates to the technical field of tablet computer coatings, in particular to a method for preparing a high-performance heat dissipation coating for tablet computers. Background technique [0002] With the rapid development of science and technology, tablet computers are widely favored by people because of their small footprint and ease of use. The touch screen is used as the basic input device. The rear shell, the front frame and the rear shell are assembled to form the entire shell, and the coating on the surface of the shell is mostly aesthetically pleasing, and its performance is low. The present invention has developed a new type of paint that is coated on the tablet computer to improve the performance of the tablet computer. heat radiation. [0003] Existing Chinese patent literature (publication number: CN102977756B) discloses a kind of two-component primer that matches with UV coating that the plastic casing of notebook computer i...

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Problems solved by technology

[0003] Existing Chinese patent literature (publication number: CN102977756B) discloses a kind of two-component primer that matches with UV coating that the plastic casing of notebook computer is coated with, comprises main agent and curing agent, and described main agent comprises following weight content Components: low hydroxyl value hydroxy acrylic resin 10-20%, medium and low hydroxyl value hydroxy acrylic resin 10-20%, medium hydroxyl value hydroxy acrylic resin 20-40%, cellulose acetate butyrate resin 5-15%, attached Concentration accelerator 0-2%, leveling agent 0.2-0.5%, defoamer 0.2-0.5%, pigment slurry 5-30%, solvent 15-25%; the curing agent includes the following components by weight: 70-80% of diisocyanate, 20-30% of solvent, the heat dissipation effect of this coating is poor, and further improvement is needed

[0004] Chinese patent literature (publication number: CN107474717A) discloses an antistatic coating for computer mainframes. The coating includes the following components in parts by weight: 65-85 parts of polyurethane, 15-20 parts of silicone polyurethane, alkyd resin 45-80 parts, 35-60 parts of ethyl acetate, 35-80 parts of toluene diisocyanate, 15-25 parts of zinc oxide, 20-35 parts of nickel oxide, 1-15 parts of modified copper foam, 12-40 parts of nano carbon 1-5 parts of rosin, 12-14 parts of xylene, 15-20 parts of cyclohexanone, 25-38 parts of trimethylolpropane, 60-100 parts of polyol, 0.5-1.2 parts of defoamer, anti-aging agent 0.2-1.5 parts, 1-3 parts of pigment, although the coating has anti-static effect, but the heat dissipation function is poor

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