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Rok Brišar

New strategies for the achievement of silylated polyurethanes with improved rheological and tensile properties

University of Rostock, 2017

Abstract: Silylated polyurethanes are often the prime components of many sealants and adhesives. However the main drawback accompanying these products is the high viscosity of prepolymers after their synthesis. It has been revealed that the main reason for the increased prepolymer viscosity is a high amount of hydrogen bonding between urea and urethane groups. This thesis summarizes the development of several strategies for overcoming a severe viscosity buildup by eliminating or reducing the amount of hydrogen bonding. A variety of coupling reagents were prepared by modification of aminoalkoxysilanes.

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