METHOD FOR THE SYNTHESIS OF AN AUXETIC POLYURETHANE FOAM WITH A DEFINED CELL STRUCTURE AND AUXETIC POLYURETHANE FOAM OBTAINABLE BY THE METHOD

摘要

The invention relates to a method for the synthesis of an auxetic polyurethane foam with a defined cell structure and an auxetic polyurethane foam substrate obtainable by a method according to the invention. The method comprising the steps of: a. mixing a polyol reagent and a foaming reagent, forming a reaction mixture; b. mixing an isocyanate with the reaction mixture; c. compressing and/or contracting the reaction mixture of step b; and d. allowing to cure the compressed reaction mixture of step b.