Heat reflective insulating stoving varnish coating and preparation method thereof

Abstract

The invention discloses a heat reflective insulating stoving varnish coating and a preparation method thereof. The stoving varnish coating comprises the following components in percentage by weight: 40-60% of a film-forming resin, 8-15% of a mixed solvent, 10-25% of an infrared reflective pigment, 1-5% of insulating powder, 6-15% of filler and 1.2-3.5% of an auxiliary, totaling 100%, wherein the film-forming resin comprises a mixture of thermosetting acrylic resin, acrylic resin and amino resin. As the film-forming resin contains the above three main resins, the stoving varnish coating has good weather ability, mechanical property and chemical resistance. As the infrared reflective pigment and heat insulating powder are added into the raw material, the coating is high in reflection efficiency of sunlight and good in insulating effect.

Description

technical field [0001] The invention relates to the technical field of baking varnish, and particularly discloses a heat-reflecting heat-insulating baking varnish and a preparation method thereof. Background technique [0002] Baking varnish refers to a paint that is sprayed on the workpiece and cannot form a paint film at room temperature. It must be baked at a certain temperature and for a certain period of time to dry and form a paint film. The energy of solar radiation is mainly concentrated in the wavelength range of 200-2500nm, ultraviolet light accounts for 5%, and the wavelength is 200-400nm; visible light accounts for 45%, and the wavelength is 400-720nm; 2500nm; other electromagnetic radiation can account for 5%. [0003] Although the existing heat-reflective and heat-insulating coatings also have heat-reflecting substances and heat-insulating substances, most of the film-forming substances are acrylic resins, polyester resins, fluorosilicone resins, epoxy resins,...

AI Technical Summary

Problems solved by technology

[0003] Although the existing heat-reflective and heat-insulating coatings also have heat-reflecting substances and heat-insulating substances, most of the film-forming substances are acrylic resins, polyester resins, fluorosilicone resins, epoxy resins, etc., and the main film-forming substances are relatively single. Comprehensive performance is not good enough

For example, patent CN103396715A discloses a heat-reflective heat-insulating coating, which is composed of a main agent and a curing agent. Hexamethylene diisocyanate and ester solvents, although the paint is colorful, its weather resistance and chemical resistance are not enough

Patent CN102876181A discloses a heat-insulating reflective coating for ultra-thin metal plates, the film-forming resin in the primer and topcoat is selected from epoxy resin, polyester resin or epoxy-modified acrylic resin, and the curing agent is methyl etherified melamine Resin or butylated melamine resin, etc., but the combination of epoxy-modified acrylic resin, polyester resin and the above-mentioned curing agent does not appear in the examples

In addition, the patent CN101812269A discloses a solar heat radiation reflective coating, mentioning that the film-forming substance is a resin or an emulsion, and the resin can be one or more of acrylic resin, epoxy resin, alkyd resin, polyester resin or other coating resins species, but the patent also does not disclose the specific combination of film-forming substances

Patent CN1800283A discloses a kind of thermal insulation coating, and its film-forming material comprises polyester resin, alkyd resin, epoxy resin, acrylic resin, amino resin, phenolic resin, polyvinyl chloride resin, organosilicon modified polyester resin, organic Silicon-modified polyester resin, silicone-modified acrylic resin, silicone resin, fluorocarbon resin, etc., but similarly, the overall performance of the coating such as aging resistance is still not excellent enough, and it does not have heat reflection performance

[0004] In addition, there are many water-based acrylic amino baking varnishes in the prior art, such as "Development of Water-based Acrylic Amino Baking Paint", Wang Chengwei, etc., Shanghai Paint, Volume 45, No. 3, introduced water-soluble acrylic amino baking varnishes. Raw material composition, production process and development of baking varnish; "Preparation and performance test of water-based acrylic acid modified alkyd amino baking varnish", Xu Zhiyou et al., Shanghai Paint Vol. 49 No. 7, using water-based acrylic modified alkyd resin as The film-forming substance, partly methylated amino resin is used as curing agent, and the obtained water-based amino baking varnish has excellent performance, but it is water-based, and the drying time is long, and due to the singleness of the film-forming substance, the overall performance of the baking varnish is insufficient

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