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Weathering resistance enhancing coating varnish and preparation method and application thereof
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A varnish and weather-resistant technology, which is applied in coatings, reflective/signal coatings, polyurea/polyurethane coatings, etc., can solve the problems of difficult to improve the weather resistance of coatings supporting coatings, achieve the best decorative effect, good construction performance, The effect of high solids content
Inactive Publication Date: 2018-05-18
ZHEJIANG SHUREN UNIV
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[0005] The purpose of the present invention is to: through the light transmittance influence and test research of the finish varnish, achieve the purpose of strengthening the weather resistance of the supporting coating by reducing the light transmittance of the coating, and solve the general difficulty in the weather resistance of the supporting coating of the coating in the prior art. raised questions
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[0078] Ratio of main raw materials: main agent: curing agent = 100 parts: 30 parts.
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Abstract
The invention discloses a weathering resistance enhancing coatingvarnish and a preparation method and application thereof. The weathering resistance enhancing coatingvarnish is prepared from a mainagent and a hardener, wherein the parts by weight of the main agent and the hardener are (100:30) to (100:50). The weathering resistance enhancing coatingvarnish is prepared from the main agent usingpolyurethane acrylate resin along with filler, catalyst, defoaming agent, leveling agent, light absorbent, light stabilizer, solvent and other materials and then cooperating with polyisocyanate, water absorbent, solvent and the like of the hardener. The coating varnish can be applied on a matched coating layer under the condition of self-dying or medium-and-low-temperature baking, and the thickness of a varnish film applied once is 30 Mu m to 40 Mu m. The coating varnish enhances the weathering resistance of the original matched coating, solves the problem that ordinary coating varnish only has decorativeness and cannot effectively enhance the weathering resistance of coating, and in particular, plays an important role in enhancing the weathering resistance of non-flashing finishing paint.
Description
technical field [0001] The invention relates to the technical field of enhanced protection for spray-coated substrate products matched with coatings, in particular to a preparation method and application of an acrylic polyurethane finish varnish with enhanced weather resistance. Background technique [0002] Coating and coating matching has always focused on the improvement of weather resistance on the top coat, but this performance has developed to a certain bottleneck stage, and it is difficult to improve without new materials. Because the transparency of the varnish will make the matching coating film look plump and bright, but the light will directly destroy the topcoat through the varnish coating, so that the weather resistance of the topcoat is the same as that of the supporting coating . For a long time, the matching of paint coating is to spray finish varnish on the metallic paint coating and the solid color topcoat is not sprayed with finish varnish. Accompanied b...
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