Method for self-catalytic directional degradation of polyurethane material, polyol prepared thereof and polyurethane material

Abstract

The original abstract is amended to “A method for self-catalytic directional degradation of polyurethane material includes performing a crushing step, performing a mixing step, performing a degradation step, and performing a heating and pressure reduction step. In the crushing step, the polyurethane material is crushed to form several polyurethane particles. In a mixing step, the several polyurethane particles are mixed with an alcoholamine compound to form a degradation system, and the alcoholamine compound has a structure represented by formula (I) or formula (II), of which each symbol is defined in the specification. In the degradation step, the degradation system is degraded at a reaction temperature to obtain an intermediate product. In the heating and pressure reduction step, the intermediate product is under the reaction temperature and a reduced reaction pressure to remove an excess portion of the alcoholamine compound, so as to obtain a polyol.”

Dependencies are inferred from the claim text.