New Type of Polymer Coating System onto Metal Surface from Polymer Emulsion

新型聚合物乳液金属表面聚合物涂层体系

基本信息

批准号：
61850172
负责人：
OKUBO Masayoshi
金额：
$ 2.24万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1988
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61850172/
关键词：
Chemical Deposition Coatings Paint Polymer Emulsion Aluminum Emulsion Polymerization Latex アルミサッシ

项目摘要

It is well knowen that electrodeposition is used worldwide as a technique for polymer coatings onto a metallic surface. Recently we have proposed a similar coating process in which the oplymer could be deposited onto an anodized aluminum plate without applied electric current only by immersing it into an anionic polymer emulsion the pH of which was adjusted below about 3. We have termed this coating process as "chemical deposition". According to a series of fundamental investigations on it, as pointed in underlines below, there were some serious problems which is required to improve for applying it industrially. The purpose of this project is to improve them and we have succeeded it as follows:1. We had usd hydrochloric acid to adjust the pH. Because of it, the properties of coatings had no high quality. We colud apply some organic acids such as formic acid and propionic acid in place of it. 2. The coating thickness decreased with an increase in the number of repeated use of the emulsion bath. We could improve the problem to use some masking agents for aluminum ions which are accumulated therein by dissolving from the aluminum plate every dipping. 3. We had to use emulsifier-free polymer emulsion, because emulsifier molecules, especially free ones gave a bad influence in the chemical deposition. the emulsifier-free emulsion had no good long storage stability. We could improve the problem by applying a polymerizable emulsifier in the preparation of polymer emulsion.

众所周知，电沉积作为一种在金属表面上涂覆聚合物的技术在世界范围内得到应用。最近我们提出了一种类似的涂层工艺，其中聚合物可以沉积在阳极化铝板上，无需施加电流，只需将其浸入阴离子聚合物乳液中，其pH值调整为低于约3。我们将这种涂层工艺称为“化学沉积”。根据对其进行的一系列基础研究，如下划线所示，它存在一些严重的问题，需要对其进行工业化应用加以改进。本项目的目的是为了改进它们，我们取得了以下成果： 1．我们用盐酸来调节pH值。正因为如此，涂料的性能质量不高。我们可以用甲酸、丙酸等有机酸来代替。 2.随着乳液浴重复使用次数的增加，涂层厚度降低。我们可以使用一些掩蔽剂来改善这个问题，铝离子是通过每次浸渍从铝板中溶解而积聚在其中的。 3.必须使用不含乳化剂的聚合物乳液，因为乳化剂分子，特别是游离的乳化剂分子对化学沉积产生不良影响。不含乳化剂的乳液没有良好的长期储存稳定性。我们可以通过在聚合物乳液的制备中应用可聚合乳化剂来改善这个问题。