The main characteristic of epoxy resin is
First, high bond strength, low shrinkage, brittle products, higher prices, room temperature curing resin temperature does not exceed 80 ℃;
Second, the epoxy curing agent, there are several types of amines, anhydrides, resin compounds, including the most commonly used amines, which can be divided into aliphatic amines, aromatic amines and modified amines and other categories, due to Ethylenediamine, m-phenylenediamine, xylylenediamine, polyamide, diethylenetriamine and other compounds toxicity, odor, and therefore gradually non-toxic, low toxicity of the new curing agent instead of such curing agent on the wet Grassroots or even underwater can be cured, it has aroused people's attention and praise;
Third, the diluent, epoxy resin is usually diluted with non-reactive diluents such as: ethanol, acetone, benzene, toluene, xylene, etc., two kinds of non-reactive diluents can be mixed to use, and sometimes reduce the shrinkage of cured products, reduce Volatiles and fissures also use reactive diluents such as propylene oxide butyl ether, propylene oxide phenyl ether, polyglycidyl ether and the like;
Fourth, plasticizers, tougheners, simple epoxy curing more brittle, impact toughness, bending strength and poor heat resistance, commonly used plasticizers, toughening agents to increase the plasticity of the plastic to improve toughness , Increase flexural strength and impact toughness; Fifth, filler, powder, fine aggregate, coarse aggregate, glass flakes collectively referred to as filler, adding appropriate filler can reduce the cost of the product to improve its performance in the plastic The amount of filler in the liquid is generally 20 to 40% by weight of the resin. When the putty is formulated, the amount can be more, usually 2 to 4 times the amount of the resin. Commonly used powders are quartz powder, porcelain powder , In addition to graphite powder, diabase powder, talcum powder, mica powder and so on.