METHOD FOR PREPARING POLYURETHANE SUPPORT PAD

摘要

This disclosure relates to a method for preparing a polyurethane mounting pad comprising the steps of: wet-solidifying a resin composition comprising polyurethane resin and a DMF solvent; and immersing the wet-solidified product in an aqueous solution comprising an acid catalyst or a base catalyst. According to the present invention, long and large pores may be uniformly formed inside of the prepared pad, thus affording low hardness, excellent compressibility, and the like, and more uniform thickness, pressure distribution or tension distribution and the like may be exhibited over the whole area of the pad, thus providing a polyurethane mounting pad that can realize more uniform and high efficiency polishing.