Organic hydrophilic coating composition, hydrophilic film and aluminum material for heat exchanger

Abstract

The present invention provides an organic hydrophilic film for forming a hydrophilic film having self-cleaning properties in addition to long-term hydrophilic properties on the surface of various hard materials such as metal materials, plastic materials, and ceramic materials. Aluminum materials for heat exchangers such as coating compositions, hydrophilic coatings, and pre-coated fin materials. The organic hydrophilic coating composition contains a polyvinyl alcohol resin as a resin component, and contains a phenolic compound as an additional component, the phenolic compound has two or more hydroxyphenyl groups in the molecule, and exists in each hydroxyphenyl group A bulky substituent that exhibits a steric hindrance effect on a hydroxyl group, and a hydrophilic film formed using the organic hydrophilic coating composition and an aluminum material for a heat exchanger are also provided.

Description

technical field [0001] The present invention relates to a method for forming on the surface of various hard materials such as aluminum materials formed of aluminum or aluminum alloys, copper materials formed of copper or its alloys, steel materials, plastic materials, ceramic materials such as glass or bricks, etc. An organic hydrophilic coating composition of a hydrophilic coating, a hydrophilic coating formed using the organic hydrophilic coating composition, and an aluminum material for a heat exchanger having the aforementioned hydrophilic coating. Background technique [0002] A hydrophilic hard material having a hydrophilic film on the surface of various hard materials such as metal materials, plastic materials, and ceramic materials is used in various fields. For example, hydrophilic hard materials using aluminum as hard materials are widely used in buildings and automobiles as fin materials and aluminum materials for various heat exchangers such as pipes due to their...

AI Technical Summary

Problems solved by technology

[0018] Therefore, the present inventors conducted intensive research on the development of an organic hydrophilic coating composition that does not emit an unpleasant odor in addition to properties such as long-term hydrophilicity that have hitherto been required. problems, and can exhibit self-cleaning properties that can easily wash away pollutants, etc. attached to the surface of the hydrophilic film during use, and can be used for heat exchangers such as pre-coated fin materials without special restrictions As a result, it was unexpectedly found that the hydrogen bond inhibitory effect of suppressing the crystallization of polyvinyl alcohol resin can be exhibited by adding a specific substituent as an additional component together with polyvinyl alcohol resin as a resin component. The phenolic compound of above-mentioned object can be realized, thereby completed the present invention

Images