Novel Delayed Action Catalysts for Shoe Sole and Micro Cellular Applications

摘要

The manufacturers of microcellular polyurethane articles require better processing aids tornmeet the escalating pressure of cost efficiency and complicated part design. Catalysts play arnkey role in the production of microcellular foams. Flowability and demold times can berndirectly impacted by the type and amount of catalyst used. However, key physical propertiesrnsuch as cell structure, dimensional stability and surface quality can also be affected byrncatalyst type and amounts. A catalyst which delays initiation time without affecting finalrndemold times can provide improved flow in complicated mold designs and help to reducernscrap rates. When initiation time or cream is extended, faster demold times can be achievedrnby simply adding more catalyst. Our objective is to develop and expand the ability of catalystrntechnology to meet current and future demands of polyurethane manufacturers.rnThis paper will introduce novel catalyst technologies that provide extended initiation timesrnwhile maintaining demold times, and in many cases these novel catalysts will providernimproved demold characteristics as well. These benefits are obtained while maintaining orrnimproving key physical properties.