OXYMER R - A NEW CLASS OF POLYCARBONATE MACRODIOLS FOR WATERBORNE COATINGS WITH EXCELLENT PERFORMANCE

摘要

A new class of versatile aliphatic polycarbonate macrodiols has been developed by Perstorp. In this paper these polycarbonates are evaluated and compared to other types of conventional macrodiols in aqueous polyurethane dispersions. This new class of polycarbonate macrodiols includes homo- or co-polymers derived from 2,2-dialkyl-l,3-propanediols. From the aqueous anionic polyurethane dispersions polymer films were cast and evaluated according to several different coating evaluation methods such as hardness, flexibility, chemical, abrasion and outdoor resistance. These newly developed polycarbonates all show a high hardness, very good adhesion, excellent water, acid and base resistance and very good weathering resistance.