matrix material EAM resin, which is a modified epoxy-acrylate obtained from E-51 epoxy resin, methacrylic acid and maleic anhydride. Add epoxy resin, methacrylic acid, maleic anhydride, polymerization inhibitor, catalyst, etc. to a three-mouth bottle equipped with a stirrer, condenser and thermometer, and react at 110-120 ℃ under nitrogen protection to unsaturated acid conversion rate ≥ 95% (control acid value less than 7), stop heating, stop reaction, and add diluent after cooling.
EMA Epoxy-Methacrylate Resin: It is a reactant made of epoxy resin and methacrylic acid. 3PU-EMA resin and PU-HPMA resin respectively react the above components EMA resin, hydroxypropyl methacrylate and hexamethylene diisocyanate, polymerization inhibitor, catalyst, etc. at a certain temperature until the-NCO group basically disappears.
Crosslinking agent: First, use the following monomers as crosslinking agent, methyl methacrylate, ethylene glycol dimethacrylate, triethylene glycol dimethacrylate, butylene glycol dimethacrylate, etc.
Manufacturing of composite resin: the primer is in a volume ratio of 1:1, take two components of primer A and B, stir evenly, and apply it on the acid-etched tooth surface for a solidification time of 1.5-2.5min. The material belongs to anaerobic oxidation type and the anaerobic layer on the surface does not cure.
Generally, the two components A and B of the paste are evenly mixed according to the volume ratio of 1:1, and the solidification time is 1.5-2.5min.