Transparent heat insulating dope and preparation method thereof

Abstract

The invention discloses a transparent heat insulation coating and process for preparation. A mixed solvent of dispersant, defoaming agent, deionized water and absolute ethyl alcohol and nano-powder are put into a beaker, the PH value is regulated to 6.5 to 7.4, and homogenate of 30 minutes to 60 minutes is implemented on a high speed homogenizer, and 20 to 30 times of ultrasonic dispersion is performed. Ultrasonic agitation is conducted, and when the ultrasonic agitation is stopped, cold air is let in. Further, water polyurethane dispersoid, the defoaming agents, thickening agents and texanol are added in, the PH value is regulated to 6.5 to 7.5, the homogenate of 20 to 30 minutes is conducted on the high speed homogenizer, and the transparent heat insulation coating is obtained. The invention is simple in preparation and needs no investment of expensive large-scale equipment, the preparation and construction technology is simple and convenient, which effectively reduces the manufacture costs and is favorable for popularization in markets. The transparent heat insulation coating of the invention has the advantages of comparatively high visible light transmittance, infrared reflectivity, transparent and uniform appearance of painting film, high rigidity, good adhesive force, strong wash resistance and ultraviolet ray aging resistance.

Description

technical field [0001] The invention relates to a transparent heat-insulating coating used on building glass, in particular to a transparent heat-insulating coating and a preparation method thereof. Background technique [0002] With the rapid development of social economy, energy saving has become the focus of the whole society. Since ordinary glass is not selective to sunlight, when the sunlight passes through the glass window, the heat generated by the sunlight radiation is also transmitted into the room at the same time, increasing the indoor temperature. The poor heat insulation effect of ordinary glass is one of the main reasons for the energy loss or energy consumption increase of buildings. The hot summer makes the air conditioning load significantly increase. [0003] At present, metal-coated heat-reflecting glass and various heat-reflecting films are mainly used in the market to block the transmission of part of the sunlight to achieve the purpose of heat insulati...

AI Technical Summary

Problems solved by technology

Although metal-coated heat-reflective glass has a good heat insulation effect, its transmittance in visible light is very low (only about 20%). If it is applied to building glass, it will affect indoor lighting to a certain extent; Glass' high reflectivity of visible light causes "light pollution" and its use in buildings is currently limited

Although all kinds of heat reflective film glass have high visible light transmittance (>50%), the heat insulation effect is generally not high

In addition, both metal-coated heat-reflective glass and various heat-reflective films are mostly processed by ion sputtering or vacuum plating. These methods require expensive equipment investment, high process conditions, and large production power consumption. Metal-coated heat-reflective glass and heat-reflective film are relatively high, which is not conducive to large-scale market promotion

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