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    决定水性环氧地坪漆固化程度的四个因素

    2018-10-31 07:27:56 无锡盛发地坪科技有限公司 阅读

    水性环氧地坪漆为多相体系,环氧树脂和固化剂以分散相形式分散在水相中,交联固化过程是在水分蒸发的过程中微粒之间的相互渗透内部扩散交联反应过程,因此水性环氧地坪漆的固化程度取决于以下四个因素:a)相容性:水性环氧树脂与水性环氧固化剂的相容性越好,越有利于固化剂微粒与环氧树脂微粒相互内部扩散,有利于固化反应的进行;

    Waterborne epoxy floor paint is a multiphase system. Epoxy resin and curing agent are dispersed in aqueous phase in the form of dispersed phase. The cross-linking and curing process is a process of internal diffusion and cross-linking between particles in the process of water evaporation. Therefore, the curing degree of waterborne epoxy floor paint depends on the following four factors: a) water compatibility: The better the compatibility of waterborne epoxy resin and epoxy curing agent, the more conducive to the internal diffusion of curing agent particles and epoxy resin particles, conducive to the curing reaction. b)粒径:粒径较小时,水性环氧树脂与水性环氧固化剂分散相粒子能够较充分地相互渗透到内核从而达到较完全的固化程度;

    B) Particle size: when the particle size is small, the dispersed phase particles of water-borne epoxy resin and water-borne epoxy curing agent can penetrate into the core more fully to achieve a more complete degree of curing.

    c)亲水亲油平衡值:水性环氧树脂与水性环氧固化剂的亲水亲油平衡值接近,在水相中达到一致的共存 稳定状态,如果差异较大,亲水性较强的组分会逐渐聚集于水相中,从而导致树脂相和固化剂相分离;

    C) Hydrophilic-lipophilic equilibrium value: the hydrophilic-lipophilic equilibrium value of waterborne epoxy resin and waterborne epoxy curing agent is close to each other, reaching a consistent coexistence and stability state in the water phase. If the difference is large, the hydrophilic components will gradually accumulate in the water phase, resulting in the separation of the resin phase and curing agent phase.

    d)分散均匀程度:在多相分离的状态下,只有通过一定的机械搅拌作用, 才能将树脂相和固化剂相均匀分布于水相中; (环氧在应用中搅拌混合均匀非常重要)(有些朋友在使用油性环氧过程中认为只要简单搅拌甚至不搅拌也能 成膜,其实这存在很大的误区,因为所使用的油性环氧是由固体环氧溶解而成如75%的E-20,即使不加固化剂,溶剂挥发后可形成很硬的干膜状态,但这种干膜是未经固化剂交联固化的,受热后变成液态,干膜毫无性能可言) 。

    D) Dispersion uniformity: in the state of multi-phase separation, only through a certain mechanical stirring can the resin phase and curing agent phase be evenly distributed in the water phase; (epoxy in the application of mixing uniformity is very important) (some friends in the use of oily epoxy that as long as simple stirring or even not stirring There is a big mistake in forming film because the oily epoxy used is dissolved by solid epoxy as 75% of E-20. Even if no hardener is used, the solvent can be volatilized to form a very hard dry film, but this dry film is not cured by curing agent cross-linking and becomes liquid after heating, and the dry film has no performance. ).



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