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当前位置:首页 > 新闻中心 > 如何提高地坪漆中环氧树脂与环氧固化剂之间的相溶性

如何提高地坪漆中环氧树脂与环氧固化剂之间的相溶性

2020-02-29

为了提高保定环氧地坪漆中环氧树脂与固化剂之间的相容性,提高涂膜的耐水性,把环氧树脂和固化剂都设计成分散体的形式是很重要的。一方面对环氧树脂进行亲水基团改性,早期的环氧乳液采用外加乳化剂的方法制备,其稳定性和耐水性均不好,现在大都采用聚乙二醇、醇醚化合物或非离子表面活性剂等与环氧树脂进行改性反应,在环氧树脂分子中引入亲水基团,使其具有自乳化性能。

In order to improve the compatibility between epoxy resin and curing agent in epoxy floor paint and the water resistance of the film, it is very important to design the form of dispersions of epoxy resin and curing agent. On the one hand, the hydrophilic groups of epoxy resins are modified. The early epoxide emulsion is prepared by the addition of emulsifiers, and its stability and water resistance are not good. Nowadays, polyethylene glycol, alcohol ether compounds or non-ionic surfactants are used to modify the reaction with epoxy resin, and introduce hydrophilicity into the epoxy resin molecules. The group has self emulsifying property.

另一方面,对固化剂进行改性,可以是一种双酚A与胺的加成物,同样经过用亲水基团改性,而体系中不存在游离的非离子表面恬性剂,是一种水性分散体或水包油的乳藏,可以用水来降低体系的黏度,而不会发生相分离.而Ⅱ型涂料在稀释时常需加人乙酸使胺固化剂稳定。目前国外已有不少此类水分散体固化剂专利公开,国内也有厂家推出了该类固化剂产品。并在一些领域得到了应用。 用水性环氧乳液与水性胺固化剂分散体复配的体系被称为V型水性环氧体系,它改变了过去胺固化剂是水可溶的状态,提高了与树脂的匹配性,有人用原子力显微镜对V型体系进行了研究,表明涂膜的均匀性得到了很大的提高。

On the other hand, the curing agent can be modified as an additive of bisphenol A and amine, which is also modified by hydrophilic groups, and there is no free non-ionic surfactant in the system. It is a water-based dispersion or oil-in-water emulsion, which can be used to reduce the viscosity of the system without phase separation. When coating is diluted, it is necessary to add acetic acid to stabilize the amine curing agent. At present, many patents of such water dispersions curing agents have been published abroad, and some domestic manufacturers have introduced such curing agents. It has been applied in some fields. The system of water-borne epoxy emulsion and dispersions of waterborne amine curing agent is called V type waterborne epoxy system. It changes the water soluble state of amine curing agent in the past, and improves the compatibility with resin. Some people have studied the V type system by atomic force microscope, which shows that the uniformity of coating film has been greatly improved. 



标签:   保定环氧地坪 地坪 保定环氧地坪漆 保定环氧地坪施工