BORON-CONTAINING BISPHENOL-A FORMALDEHYDE RESINS AND COATINGS BASED ON THEM

Abstract

The modern chemical industry is actively developing towards the creation of new materials with improved physicochemical properties. Diphenylolpropaneformaldehyde resins are one of the most common thermosetting polymers due to their ability to form a three-dimensional network with high mechanical characteristics and resistance to aggressive environments. They are obtained by condensation of diphenylolpropane (bisphenol A) with formaldehyde in the presence of acid or alkaline catalysts. The addition of individual elements, such as boron, silicon and phosphorus, to the main base of the thermosetting resin is a new strategy for obtaining special high-performance resins, which leads to higher mechanical properties and increased thermo-oxidative stability compared to conventional phenol-formaldehyde resins. One of such promising areas is the synthesis of boron-containing resins based on diphenylolpropaneformaldehyde polymers, which are widely used in various industries, in particular in the paint and varnish, electrical, adhesive and thermal insulation sectors. Thus, the study of the synthesis processes of boron-containing diphenylolpropaneformaldehyde resins is an urgent task, since it contributes to the development of new materials with improved physicochemical and operational characteristics. The paper considers the main synthesis methods, mechanisms of interaction of boron-containing compounds with a polymer base, as well as the influence of boron on the final properties of the obtained resins and coatings based on them. It has been established that coatings based on boron-containing butanolized diphenylolpropane-formaldehyde oligomers modified with vegetable fats have better elasticity and impact strength, as well as thermal stability up to 250–260 °C, which is greater than for similar diphenylolpropane-formaldehyde resins without boron.