High-resistance water-based metal matte stoving varnish for computer case and preparation method of high-resistance water-based metal matte stoving varnish
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A computer case, high-resistance technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of chemical resistance gap and harshness, and achieve good recoatability, strong adhesion, and excellent sag resistance Effect
Pending Publication Date: 2022-07-29
中山蓝海洋水性涂料有限公司
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On the other hand, the surface coating of the computer case puts forward extremely strict and even harsh chemical resistance requirements for the paint film, including hot water resistance, 95% ethanol abrasion resistance, coffee resistance (Nestlé 2 in 1), resistance to cola, resistance to 5 % Baimao brand cleaner, 1% glacial acetic acid resistance, edible sesame oil, etc., but there is still a big gap in the chemical resistance of such water-based metal baking varnish products on the market
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preparation example Construction
[0064] A preparation method of the above-mentioned high-resistance water-based metal matte baking varnish for a computer case, comprising the following steps:
[0065] a. Preparation of water-based pigment and filler intermediates
[0066] According to the formula of the water-based pigment and filler intermediate, add water, dispersant, defoamer 1, wetting agent, superfine barium sulfate, anti-rust pigment, coloring pigment, anti-settling agent, ethylene glycol and others into the dispersing tank in turn. Components, high-speed dispersion for 30-50min, high-speed dispersion speed is 1200-1500r / min, sampling and testing, if the slurry fineness is ≤20μm;
[0067] b. Preparation of high-resistance water-based metal matte paint
[0068] Add epoxy-modified hydroxypropyl dispersion, water-based acrylic-modified polyurethane resin, neutralizer, cosolvent, water-based pigment and filler intermediate, defoamer 2, fluorocarbon surfactant, partial methyl etherification into the dispers...
Embodiment
[0070] The present invention will be further described below in conjunction with specific embodiments, but not limited thereto.
[0071] In this specific embodiment, Examples 1 to 5 are set to prepare the high-resistance water-based metal matte baking paint for computer chassis, wherein the formula of the water-based pigment and filler intermediate is shown in Table 1, and the formula of the main paint is shown in Table 2. The formula composition of Table 1 and Table 2 is calculated in terms of raw material mass percentage (%):
[0072] Table 1 The formula of water-based pigment and filler intermediate (unit: %)
[0073]
[0074]
[0075] Table 2 Main paint formula composition (unit: %)
[0076]
[0077]
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Abstract
The invention belongs to the technical field of water-based paint, and particularly discloses high-resistance water-based metal matte stoving varnish for a computer case and a preparation method of the high-resistance water-based metal matte stoving varnish. The stoving varnish comprises the following components by weight: 26-38% of an epoxy modified hydroxypropyl dispersion; 6 to 18 percent of water-based acrylic acid modified polyurethane resin; 0.2 to 0.8 percent of a neutralizing agent; 1.6%-4.8% of a cosolvent; 30-50% of a water-based pigment and filler intermediate; 0.1 to 0.3% of a defoaming agent 2; 0.1%-0.3% of a fluorocarbon surfactant; 1.5 to 2.5% of a partially methylated melamine formaldehyde resin; 2 to 3.6 percent of high methylated melamine formaldehyde resin; 1%-3% of water-based blocked polyisocyanate; 0.1 to 0.5% of a leveling agent; 0.2%-0.8% of a water-based boiling-resistant auxiliary agent; 0.1 to 0.3% of a scratch-resistant wax auxiliary agent; 0.1 to 0.3 percent of matt powder; 2.8 to 5.0 percent of water and other components. The product provided by the invention can comprehensively meet the performance indexes of a baking varnish film of a computer case in the aspects of hot water resistance, 95% ethanol resistance, coffee resistance, cola resistance, cleaning agent resistance, 1% glacial acetic acid resistance, edible oil and the like.
Description
technical field [0001] The invention belongs to the technical field of water-based paints, and particularly relates to a high-resistance water-based metal matte baking paint for computer cases and a preparation method thereof. Background technique [0002] Most of the metal substrate surfaces of computer cases are painted with amino paint. With the advancement of the water-based paint process, the surface coating of computer cases is in the stage of transformation and upgrading from traditional oil-based amino paint to water-based amino paint. [0003] Judging from the current practical application of water-based amino paint for computer cases, water-based amino paint has strong adhesion, high hardness, good scratch resistance, low VOC (volatile organic compound) content, and poor construction technology and drying speed. Restricted by seasonal temperature changes and other characteristics, it is deeply recognized and welcomed by relevant paint workers and front-line constr...
Claims
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