Polyurethane backed carpet

A carpet comprising (I) a primary backing;

• (II) a yarn tufted or woven through said primary backing thereby creating a yarn bundle on the underside of the resultant tufted or woven textile article and (III) a polyurethane composition applied to the underside thereby encapsulating the yarn bundles and adhering the yarn bundles to the primary backing;
• said polyurethane composition comprising the catalyzed reaction product of a mixture comprising
• (A) a relatively high molecular weight polyether polyol having an average of from 2 to about 8 hydroxyl groups per molecule and an average hydroxyl equivalent weight of from about 500 to about 2200 or a mixture of such polyols;
• (B) a relatively low molecular weight polyol having an average of from about 2 to about 8 hydroxyl groups per molecule and an average equivalent weight of from about 31 to about 230 or a mixture of such polyols;
• (C) an organic polyisocyanate or polyisothiocyanate having an average of from about 2 to about 4 NCX (each X being independently O or S) groups per molecule or a mixture of such isocyanates or isothiocyanates;
• and
• (D) an inorganic filler component;
• wherein:
• (1) components (A) and (B) are present in quantities such that the ratio of the number of hydroxyl equivalents contributed by component (B) to the number of hydroxyl equivalents contributed by component (A) is from about 0.8:1 to about 5.5:1;
• (2) components (A), (B) and (C) are present in quantities so as to provide an NCX/OH ratio of from about 0.95/1 to about 1.5/1;
• with the proviso that the NCX:OH ratio is sufficient to provide a tuft lock value of at least about 12 pounds and the edge curl value is not greater than about 4.1 centimeters at the particular ratio at which components (A) and (B) are employed and the particular equivalent weights at which components (A) and (B) are employed;
• and
• (B 3) component (D) is present in quantities of from about 50 parts to about 300 parts per 100 parts by weight of liquid reactants;
• and
• wherein (a) said carpet has a tuft lock of at least about 12 pounds (5.44 kg) and an edge curl of not greater than about 4.1 centimeters and (b) the time required for the catalyzed, filled, unfrothed polyurethane forming mixture to reach a Brookfield viscosity of 20,000 centipoise is greater than about 70 seconds measured from the time the catalyst is added to a mixture of the other components, said catalyst being added when the temperature of the uncatalyzed mixture is about 93.degree. F., .+-.1.degree. F.