METHOD OF PROCESSING POLYURETHANE WASTE Russian patent published in 1996 - IPC

FIELD: polyurethane production. SUBSTANCE: utilization of secondary polyurethanes formed in the process of shoe sole manufacture makes it possible to widen variety of ware and materials with high performance and also to resolve the problem of polyurethane waste disposal bearing in mind improvement of environmental condition. For this purpose waste or faulty ware made of porous polyurethane elastomer are subjected to plasticization by way of preliminarily processing the latter with aproton-type organics followed by rolling at room temperature and pressing polymer strip obtained at 125-130 C and 50-80 MPa pressure for 12-15 min to produce needed objects. EFFECT: achieved reutilization of polyurethane waste. 5 tbl