The ageing process of epoxy floor paint film is not a touch-by-touch process, but a gradual process of change. Now we will introduce three characteristics of the ageing process of epoxy floor paint film in detail from light to weight. First, loss of light: loss of light is the initial feature of the ageing of epoxy floor paint film, because the epoxy floor paint film is purple in sunlight. The influence of external irradiation causes photochemistry reaction, which degrades the epoxy resin composition and gradually loses its original luster until it develops into total loss of luster. The gloss of epoxy floor paint coating is an important index of decorative epoxy floor paint coating. Once the film loses its gloss (except the original glossy coating), it has no decorative property. Therefore, the epoxy floor paint coating can achieve glossy, full and bright, not only related to the ring, but also through the epoxy floor paint coating. The correct choice of oxygen floor paint is also one of the important indicators to measure the coating technology level of epoxy floor paint. 二、变色
这也是环氧地坪漆涂膜开始老化的一种较明显的征兆。环氧地坪漆涂膜从正常的颜色发牛色相 或色泽的改变，有的变深，有的变浅，有的发暗，有的白色变黄，有的红的 变粉色或变浅等，这些都属于变色。其原因是由于光化学反应的结果，对色漆来说，其变色与树脂的性质有一定关系，但主要还是取决于选用的颜料的性质，不同颜料有不同的光敏性，由此显示出不同的保色性。
This is also a more obvious sign of aging of epoxy floor paint film. Epoxy floor paint film changes from normal color to cattle color or color, some darkens, some lightens, some darkens, some whites turn yellow, some Reds turn pink or light, and so on, which belong to discoloration. The reason is that the photochemical reaction results in the discoloration of the paint, which has a certain relationship with the properties of the resin, but mainly depends on the properties of the selected pigments. Different pigments have different photosensitivity, which shows different color retention.
Powdered epoxy floor coatings are characterized by the gradual deepening of aging. The main reason is that the interaction between ultraviolet radiation and oxygen causes the crosslinking or degradation of resin molecular chains, which leads to the separation of resin and pigment particles and the appearance of dedusting phenomenon. Secondly, it is closely related to the nature and shape of pigment.
The phenomenon of pulverization is due to serious loss of light or loss of light after coating on epoxy floor paint. That is to say, not only the decorative properties of the coating have been completely lost, but also its protective properties have begun to be destroyed, which indicates that the aging of the coating has tended to a serious stage.
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