Is there any poison in the resin?
The question is a bit too large. What kind of resin? Give you a look at the viscosity of epoxy resin and epoxy resin adhesive itself is non-toxic, but because in the preparation process of adding solvent and other toxic substances, so a lot of epoxy resin, so the "toxic" in recent years the domestic epoxy resin industry is modified by water, avoid adding and other ways to maintain "non-toxic" color epoxy resin. At present, most epoxy resin coatings are solvent based coatings, which contain large amounts of volatile organic compounds (VOC), which are toxic and flammable, thus causing environmental and human harm.
Properties and properties of epoxy resin1, diverse forms. Various resins, curing agents and modifier systems can almost accommodate the requirements of various applications for the form, ranging from very low viscosity to high melting point solids.2, easy curing. With various curing agents, the epoxy resin system can be cured almost at a temperature range of 0~180 DEG C.3 strong adhesion. The presence of polar hydroxyl groups and ether bonds inherent in the molecular chain of epoxy resins makes it highly adhesive to various substances. When cured, epoxy resin has low shrinkage and little internal stress, which also helps to increase adhesive strength.4 low contractility. The reaction between the epoxy resin and the curing agent is carried out by the direct addition reaction or the ring opening polymerization of the oxygen radical of the resin molecule, without the release of water or other volatile by-products. Compared with unsaturated polyester resins and phenolic resins, they show very low shrinkage (less than 2%) during curing.5 mechanical properties. The cured epoxy resin system has excellent mechanical properties.6 electrical properties. The cured epoxy resin system is an excellent insulating material with high dielectric properties, surface leakage resistance and arc resistance.7 chemical stability. In general, the cured epoxy resin system has excellent alkali resistance, acid resistance and solvent resistance. As with other properties of the curable epoxy system, the chemical stability also depends on the resins and curing agents selected. Proper selection of epoxy resin and curing agent can make it have special chemical stability.8 dimensional stability. Many of these properties are combined to make the epoxy system with outstanding dimensional stability and durability.9 mildew resistance. The cured epoxy system is resistant to most molds and can be used in harsh tropical conditions.
Epoxy resins refer to organic macromolecular compounds containing two or more epoxy groups in the molecule, and their molecular weight is not high except for two. The molecular structure of epoxy resin is characterized by the presence of active epoxy groups in the molecular chain. The epoxy group can be located at the end of the molecular chain, intermediate or ring like structure. Because the molecular structure contains active epoxy groups, they can react with various types of curing agents to form insoluble and non melting polymers with three directions network structure.
