Resin composition excellent in anti-icing property and laminated metal plate with anti-icing layer formed

Abstract

Provided is a fin material for use with a heat exchanger. The surface of the provided fin material remains hydrophilic over a long period of time, and it is difficult for ice or frost to form on the provided fin material even if the temperature drops. Also provided is a resin composition that serves as a raw material for the aforementioned fin material, said resin composition being enduringly hydrophilic and exhibiting inhibition of ice and frost formation. Also provided is a laminated metal place on which an ice / frost-formation inhibition layer obtained from the aforementioned resin composition is formed. The aforementioned resin composition contains: (A) at least one anionic compound selected from a set comprising vinyl polymers, vinylidene polymers, polysaccharides, polyamino acids, and polypeptides, said compound(s) containing at least one anionic group selected from a set comprising carboxyl groups, sulfo groups, phosphate groups, and boric-acid groups; and (B) at least one cationic compound selected from a set comprising vinyl polymers, vinylidene polymers, polyalkylene imines, polyamines, polysaccharides, polyamino acids, and polypeptides, said compound(s) containing at least one cationic group selected from a set comprising amino groups, imino groups, amidine groups, pyridyl groups, imidazoline groups, and nucleobases.

Description

technical field [0001] The present invention relates to a heat radiation sheet used as a part of a heat exchanger or the like used in an air conditioner, and more particularly to a resin composition for forming a frosting suppression layer on the surface of the heat radiation sheet. Background technique [0002] In the heat exchanger of an air conditioner, metal fins are used to exchange heat efficiently and to keep the space compact. The fins are arranged side by side at narrow intervals. Among heat dissipation sheets, aluminum is widely used because of its excellent thermal conductivity, workability, corrosion resistance, and the like. Therefore, when the air conditioner is in operation, if the temperature of the surface of the heat dissipation sheet is below the dew point of the air, the condensation water adhering to the surface of the heat dissipation sheet will condense, and a bridge of dew condensation water may be formed between adjacent heat dissipation fins, causi...

AI Technical Summary

Problems solved by technology

However, the coating film obtained by using synthetic silica becomes hard, so there is a problem that the wear of tools, dies, etc. is increased during the forming process of the heat dissipation sheet.

In addition, there is also a problem that the smell of cement or dust unique to silica, which is presumed to be caused by substances adsorbed on silica or scattering of silica fine particles, makes the human body uncomfortable.

[0012] In the above-mentioned Patent Documents 9 and 10, frosting is prevented by forming unevenness on the surface. However, in the case of a heat dissipation sheet, if the unevenness is formed on the surface, for example, when an external force is applied to the coating on the surface as in press processing, it may cause frost formation. Vulnerable to damage, film peeling off

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