Non-isocyanate Polyurethane Coatings Research Articles

Progress in Elaboration of Chemical and Abrasion Resistant Materials

Elaborations in the field of chemical and abrasion resistant coatings and composite polymer materials by company Polymate LTD.-INRC (Israel) and its employees are reviewed. The main fields of advanced corrosion resistance materials are liquid and water based rubber compositions, hybrid nonisocyanate polyurethane coatings, nanostructured organic-mineral coatings. The review includes patents used by the industry of several countries of Europe, USA, Canada and Asia.Chemical resistant materials, abrasion resistant materials, polymeric materials for coatings, hybrid nonisocyanate urethane-epoxides, nanostructured hybrid oligomer composition, rubber-based compositions, organic-mineral coatings.

Ultraviolet and thermostable non-isocyanate polyurethane coatings

Conventional monolithic polyurethanes have good mechanical properties, but they are porous, and posseses poor hydrolytic stability and insufficient permeability. The involvement of toxic components, such as isocyanates, in their production process makes this process extremely toxic and dangerous. Network non-isocyanate polyurethanes (NIPUs) are formed from the reaction between cyclocarbonate oligomers (CCOs) and primary amine oligomers (PAOs). The authors of this paper are studying new types of NIPUs based on acrylic and siloxane CCOs and dendro-polyfunctional siloxane PAOs. These investigations create the possibility to develop high-level UV-stable coatings based on acrylic -dendro-amine systems, which are curable at room temperature, and their most able siloxane-based systems that have good adhesion and mechanical properties. An advanced way of preparing thermo-stable coatings is based on ‘blocked’ non-isocyanate polyurethane.

Features of reaction amino‐cyclocarbonate for production of new type nonisocyanate polyurethane coatings

We have studied different ways of preparing UV resistant oligomers with terminated cyclocarbonates, epoxy and amino groups. We have studied possibility of preparing HNIPU UV stable coatings. Linear and branched amino containing oligomers based on di- and tricyclocarbonates and primary diamines were investigated. It was found that oligomers should be used for curing epoxy-saturated resins, but since the residual quantity of amines this system can't be used for UV resistant coatings. The same problem was in system on the base of nonisocyanate epoxy-urethane oligomers cured by tertiary amines. Coating on the base of acrylic cyclocarbonates and oligomers with primary amines are similar to conventional polyurethane coatings on the base of acrylic hydroxyl containing oligomers and isocyanates, but mechanical properties and chemical resistance are better.