A POLYURETHANE-FORMING COMPOSITION USEFUL FOR BACKING TEXTILES AND A PROCESS FOR PREPARING POLYURETHANE-BACKED TEXTILES

Polyurethane-forming composition useful for backing textiles which comprises: (A) a first polyol which comprises a relatively high equivalent weight polyol containing an average of from 1.4 to 1.95 hydroxyl groups per molecule, of which at least 30 percent of the hydroxyl groups are primary hydroxyl...

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Bibliographische Detailangaben
Hauptverfasser:	KELLEY, DON, H, MOBLEY, LARRY, W
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR LAUNDERING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING TREATMENT OF TEXTILES OR THE LIKE TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL
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Beschreibung
Zusammenfassung:	Polyurethane-forming composition useful for backing textiles which comprises: (A) a first polyol which comprises a relatively high equivalent weight polyol containing an average of from 1.4 to 1.95 hydroxyl groups per molecule, of which at least 30 percent of the hydroxyl groups are primary hydroxyls or a mixture thereof with at least one additional relatively high equivalent weight polyol containing at least 2.05 hydroxyl groups per molecule, of which at least 30 percent of the hydroxyl groups are primary hydroxyls; (B) a relatively low equivalent weight compound having about 2 active hydrogen containing moieties per molecule; (C) a polyisocyanate and (D) a catalytic amount of a catalyst for the reaction of a polyol and a polyisocyanate, wherein the functionalities and proportions of components (A), (B), and (C) are such that the average functionality of the components together is from 1.97 to 2.03, and the composition has an isocyanate index of from 85 to 125. This invention is also a process for preparing a polyurethane-backed textile by coating the textile on one side with the above-described polyurethane-forming composition at a coating weight of from 1 to 300 ounces per square yard (0.03 to 10.2 kg/m ) and then heating the coated textile to a temperature of from 50 to 150C until the polyurethane-forming composition is cured to a tack-free state. Composition de formation de polyuréthane utile comme support de textile comportant (A) un premier polyol constitué d'un polyol de poids équivalent relativement élevé contenant en moyenne de 1,4 à 1,95 groupes hydroxyle par molécule, ou au moins 30% des groupes hydroxyle sont des hydroxyles primaires ou un mélange de ces derniers avec au moins un polyol supplémentaire de poids équivalent relativement élevé contenant au moins 2,05 groupes hydroxyle par molécule, dont au moins 30% des groupes hydroxyle sont des hydroxyles primaires; (B) un composé de poids équivalent relativement bas, possédant environ deux moitiés actives contenant de l'hydrogène par molécule; (C) un polyisocyanate et (D) une quantité catalytique d'un catalyseur pour la réaction d'un polyol et d'un polyisocyanate, ou les fonctionnalités et les proportions des constituants (A), (B), et (C) sont telles que la fonctionnalité moyenne des composants ensemble se trouve entre 1,97 et 2,03, et que la composition possède un indice isocyanate compris entre 85 et 125. L'invention concerne également un procédé de préparation d'un textile à support de polyu