The tree based cationic curing-Iota

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Service > The tree based cationic curing

The tree based cationic curing

In theory, those who can cationic polymerization monomer can be used for cationic cured, it is through the olefin, epoxy, ketal, vinegar, silicone and other heterocyclic compounds of various cationic monomer polymerization or copolymerization, can get better physical chemical properties of materials. The mechanism of solidified into basic resin film appeared in the late 80's, a vinyl ether series, series of epoxy. Get the vinyl ether resins can be used 311 vinyl ether and the corresponding resin reaction. But at present the most commonly used or epoxy resin or modified epoxy resin, bisphenol A resin main ring oxidation, epoxidation of silicone resin, epoxidized polybutadiene, epoxidized natural rubber, one of the most commonly used is bisphenol A epoxy resin, but the higher viscosity, the polymerization rate is slow; aliphatic epoxy resin compounds generally polymerization rate fast, of which 3, 4- epoxy cyclohexyl formic acid -3, 4- epoxy cyclohexyl methyl ester (CY179) is the most commonly used cationic aliphatic epoxy resin curing, it has low viscosity, fast polymerization speed, can be used in conjunction with bisphenol A epoxy resin.
Epoxide ring opening contraction rate is very small, on the basis of some polycyclic compounds have also been used for UV curing component, their volume expansion during polymerization can occur, such as the original carbonate vinegar in open loop volume can be expanded 1.5%,
Vinyl ethers are electron rich, can be used as cationic cured polymerized, also can be used as the diluent. Diluting the effect of diluent on the one hand, make the glue has the advantages of convenient construction and crosslinking effects of viscosity; on the other hand, must have the reaction activity, after curing into the resin network, affect the final performance of the cured products are in many aspects. Adding reactive diluent is often in order to improve the viscosity, adhesion, flexibility, hardness and the curing rate. Mechanical properties are different diluents with the base resin compatibility may vary greatly, the need for the full comparison and selection. The requirements are low viscosity, high dilution and high response ability, but also consider the volatility, toxicity, irritation and odor of small, low price, high stability, good compatibility of resin etc.. For the adjustment of various performance is often adopted in mixed diluents.

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