Patent ID: 6171678
Filing Date: 2001-01-09
Classification: C08G,D06N,Y10T

Abstract:
In a process for the preparation of tufted carpeting wherein a reactive polyurethane adhesive comprising one or more di- or polyisocyanates, a polyol component, and optionally a chain extender, is applied to a greige good comprising tufted yarns in a primary backing, the improvement comprising increasing the tuft bind, the elongation, or both the tuft bind and the elongation of the tufted carpet/adhesive combination by one or more of:a) selecting as a portion of said polyol component one or more polyoxyalkylene polyols containing a major amount of oxypropylene moieties and having an unsaturation of less than about 0.015 meq/g, an equivalent weight of from about 800 Da to about 5000 Da, a nominal functionality of from 2 to about 8, such that said polyol component has an average functionality of between about 1.9 and about 3; andb) selecting a chain extender comprising 2-methyl-1,3-propane diol.