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Hydrophilic coating method of aluminum fin material, aluminum fin material, and aluminum heat exchanger

A heat exchanger and fin technology, which is applied in the field of aluminum heat exchangers, can solve the problems of insufficient hydrophilic persistence, and achieve the effects of excellent hydrophilic persistence, excellent adhesion, and no odor problem.

Active Publication Date: 2016-11-09
NIPPON PAINT SURF CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these hydrophilic treatment agents are mixed with N-methylol acrylamide as a monomer, so the hydrophilicity persistence in the case of pollutants is not enough.

Method used

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  • Hydrophilic coating method of aluminum fin material, aluminum fin material, and aluminum heat exchanger
  • Hydrophilic coating method of aluminum fin material, aluminum fin material, and aluminum heat exchanger
  • Hydrophilic coating method of aluminum fin material, aluminum fin material, and aluminum heat exchanger

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Embodiment

[0128] Hereinafter, the present invention will be described more specifically based on examples, but the present invention is not limited to these examples.

[0129]

[0130] PAA1: Polyacrylic acid (weight average molecular weight: 20000, acid value: 780 mgKOH / g).

[0131] PAA2: Polyacrylic acid (weight average molecular weight: 60000, acid value: 780 mgKOH / g).

[0132] PAA3: Polyacrylic acid (weight average molecular weight: 2,000,000, acid value: 780 mgKOH / g).

[0133] PAA4: Polyacrylic acid (weight average molecular weight: 6000, acid value: 780 mgKOH / g).

[0134] PAA-HEMA: a copolymer of polyacrylic acid and hydroxyethyl methacrylate (weight-average molecular weight: 400,000, acid value: 400 mgKOH / g).

[0135] MAA-AAm1: a copolymer of polymethacrylic acid and acrylamide (weight average molecular weight: 20000, acid value: 200 mgKOH / g).

[0136] MAA-AAm2: a copolymer of polymethacrylic acid and acrylamide (weight average molecular weight: 20000, acid value: 40 mgKOH / g)...

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Abstract

Provided is a method for surface treatment of a heat exchanger, capable of forming a hydrophilic film which exhibits excellent adhesion to a metal surface even in such a state that water adheres to the film and which exhibits excellent durability of hydrophilicity even in such a state that a contaminant adheres to the film and which does not emit a problematic odor even when used in a heat exchanger. Also provided are: an aluminum fin material which is obtained by forming a hydrophilic film on the surface of an aluminum fin by this method; and an aluminum heat exchanger using the aluminum fin material. In the method, a hydrophilizing treatment which comprises a hydrophilic resin and crosslinkable particles is applied to a metal surface to form a hydrophilic film on the surface, said hydrophilic resin comprising: a specific (meth)acrylic resin; polyvinyl alcohol; and polyethylene oxide and / or polyethylene glycol.

Description

technical field [0001] The present invention relates to a method of coating a hydrophilic film on an aluminum fin material, an aluminum fin material, and an aluminum heat exchanger. Background technique [0002] Aluminum and its alloys are used in various applications due to their light weight, excellent workability and thermal conductivity. For example, a heat exchanger using aluminum is known. [0003] In fins of heat exchangers such as air conditioners, moisture in the atmosphere may adhere to the surface of the fins as condensed water during cooling operation, and the condensed water may cause clogging. This clogging increases the ventilation resistance, reduces the heat exchange efficiency of the heat exchanger, and causes problems such as noise generation and pollution due to scattering of condensed water. In order to prevent such a problem, the surface of the fin has been subjected to a hydrophilic treatment. [0004] In recent years, the persistence of hydrophilic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/14B05D7/24B32B15/08B32B15/082F28F1/32C09D4/00C09D129/04C09D133/02C09D133/24C09D171/00
CPCC09D4/06C09D129/04C09D171/02F28F1/10F28F19/04F28F21/084F28F2245/02C08L33/02C08L33/26C08L71/02C08L2205/025C08L2205/035
Inventor 坂田阳介朝仓亮平泽秀公水田贵彦宇佐见勉矶村纪寿
Owner NIPPON PAINT SURF CHEM
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