Polyether type polyurethane solar heat-absorbing coating and preparation method thereof

Abstract

The invention discloses polyether type polyurethane solar heat-absorbing coating and a preparation method thereof. The polyether type polyurethane solar heat-absorbing coating is prepared from the following raw materials in parts by weight: 50-100 parts of castor oil modified polyether type polyurethane, 10-30 parts of polyethylene glycol, 35-55 parts of light absorbing agent, 10-20 parts of lightabsorbing promoter, 3-5 parts of dibutyl phthalate, 5-10 parts of titanate coupling agent, 5-10 parts of EFKA-3580, 4-10 parts of polysiloxane and 2-5 parts of polyoxyethylene polyoxypropylene glyceryl ether. The polyether type polyurethane solar heat-absorbing coating and the preparation method disclosed by the invention have the advantages of high light-absorbing efficiency, low light reflectivity, strong bonding force, simple preparation process, low cost and easy industrial production.

Description

technical field [0001] The invention relates to the technical field of solar energy absorption, and more specifically relates to a polyether polyurethane solar panel heat absorption coating and a preparation method thereof. Background technique [0002] Energy utilization plays a pivotal role in the development of human society, but the excessive development of resources and inefficient resource utilization make human beings face a severe test. As we all know, solar energy is the most abundant and widely available renewable energy, which plays a major role in solving energy crisis and environmental problems. , making it a hot research topic in various countries. [0003] The solar heat absorbing coating plays an important role in receiving and absorbing solar energy, which affects the stability and efficiency of the entire solar heat absorbing system. At present, it is generally used in the market to spray black organic coatings on the heat-absorbing plate core of the coll...

AI Technical Summary

Problems solved by technology

At present, it is generally used in the market to spray black organic coatings on the heat-absorbing plate core of the collector, such as black fluorocarbon resin, black epoxy resin, black polyurethane resin, etc., because ordinary resin materials are used as adhesives And carbon black or black pigment is used as the color body, so it will cause: 1. The coating is not weather-resistant, premature powdering and fading; 2. Since ordinary carbon black or black pigment is used as the color body, there is no spectral selection sex

Therefore, its coating has a high emissivity, which results in low thermal efficiency of the solar collector.

[0004] The current solar heat-absorbing coatings are full of researches specifically aimed at the weather resistance and water resistance of solar energy coatings. Nowadays, the use of nano-materials as raw materials for heat-absorbing materials can improve the weather resistance and heat-absorbing efficiency of coatings. For example, the Chinese patent CN 102286243 A, but the cost is extremely high; there is also the use of changing the formula of the pigment to improve the weather resistance of the prepared coating, such as the Chinese patent CN 102134428 B, but its preparation process is complicated and requires high

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