Polyurethane carpet backings with improved tuft bind
AssigneeBayer Antwerp N.V.
InventorsUlrich B. Holeschovsky, David Gibala, Jeffrey L. Robbins, Robert D. Duffy
Life of this patent
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Abstract
Improvements in tuft bind and/or elongation of tufted carpet may be achieved by selecting, as components of a tuft bind adhesive, one or more of: i) a polyol component comprising a low or ultra-low unsaturation polyoxypropylene polyol optionally containing up to 30 weight percent oxyethylene moieties, and ii) a chain extender component comprising 2-methyl-1,3-propanediol.
Claims29
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;
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- b) selecting a chain extender comprising 2-methyl-1,3-propane diol.
In a tufted carpet comprising tufted yarns in a backing and having adhered thereto at least one polyurethane adhesive, the improvement comprising selecting as said polyurethane adhesive, an adhesive comprising the cured or partially cured reaction product of a composition comprising one or more di- or polyisocyanates, a polyol component, and, optionally a chain extender, wherein said composition including one or more of:
- a) said polyol component comprises 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, and a functionality of from 2 to about 8;
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- b) said chain extender comprises 2-methyl-1,3-propanediol.
An isocyanate-reactive component suitable for the preparation of reactive polyurethane carpet adhesives, said isocyanate-reactive component comprising:
- a) a polyol component comprising 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 5000 Da, and a nominal functionality of from 2 to about 8, said polyol component having an average actual functionality of between about 1.9 and about 3;
- b) a chain extender comprising 2-methyl-1,3-propanediol;
- and
- c) from 50 parts to 350 parts based on the sum of a) and b) of one or more inorganic fillers.
Dependencies are inferred from the claim text.