EPOXY BINDING AGENT FOR REINFORCED PLASTICS (VARIANTS) AND METHOD FOR ITS PREPARING Russian patent published in 2005 - IPC

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to hybrid binding agents based on epoxy triphenolic resin designated for reinforced plastics with enhanced corrosion resistance and thermal stability and to methods for their preparing. A binding agent comprises epoxy triphenolic resin, plasticizing agent as a diluting agent representing resin DEG-1, resol-phenolformaldehyde resin SF-340A as a hardening agent and mixture of acetone, ethyl alcohol and petroleum and/or coal toluene as a solvent. Anti-static additive, antipyrene additive, crystalline sodium alumosilicate and a filling agent can be added to the binding agent composition additionally. A filling agent can be in forms of monolith or hollow thread-like crystals, finely divided powder-like filling of monolith, hollow, scaly and fibrous particles. The combination of components taken in the definite ratios and carrying out a method for preparing a binding agent at enhanced temperatures and in the definite sequence of addition of components into reactor and assigned temperature-temporal regimens of their stirring and dissolving provides the improvement of properties of the binding agent. Monolith composites as product of hardening binding agents elicit improved physical-mechanical, heat-physical, electric and anti-static properties with the density value 0.96-1.1 g/cm³, the mass content of nonvolatile substances 55-63% and the gelatinizing time 4-8 min at temperature 160-200°C. The claimed invention can be used in preparing prepregs by impregnation method of glass-organo-coal-filled filling agents, among them caproamide, basalt, polyphene and fibers with different lubricants, dressings and other coatings.

EFFECT: improved and valuable properties of binding agent.

50 cl, 3 dwg, 67 tbl, 20 ex