New segmented polymers and a method of producing them

The subject of the invention are new segmented polymers containing alternate cross-linked blocks of the duroplast type and linear thermoplastic blocks. New segmented polymers according to the invention are characterized by that they have the structure of a multiblock A-B copolymer, where A denotes a spatially cross-linked oligomeric block having the chemical constitution typical of epoxy resin, phenol-formaldehyde resin, amino resin, or other duroplasts, whereas B denotes an oligomeric block of the thermoplast type having the constitution of linear opigoester, oligoether, oligoacetal, oligoamide, oligothioether, oligosilanediol or a short hydrocarbon chain. The method according to the invention consists in that a linear trifunctional A oligomer having two reactive terminal groups and at least one reactive internal group is polyreacted with a reactive bifunctional B oligomer having two reactive terminal groups, and a linear block A-B prepolymer thus obtained, having in blocks at least one unutilized reactive group, is subject to cross-linking. Polymers produced by the method according to the invention, due to very good mechanical properties, may find an application as constructional materials in building engineering of machines, motor-cars, airplanes and other engineering constructions.