Cellulosic floorcoverings and applications thereof

A floor covering comprising:

• cellulosic fibers or cellulose-based fibers;
• and
• fluoropolymer adhered to surfaces of the cellulosic fibers or cellulose-based fibers, the fluoropolymer cross-linked to the cellulosic fibers or cellulose-based fibers via a cross-linking component, in an amount sufficient for the floor covering to pass flammability testing with a methenamine-timed burning tablet according to Consumer Product Safety Commission (CPSC) Standard FF 2-70, wherein fluorine content on the cellulosic fibers or cellulose-based fibers, based on the fluoropolymer adhered to the surfaces, is 500 parts per million (ppm) to 2500 ppm,
• wherein the fluoropolymer is selected from the group consisting of perfluorinated urethanes, aliphatic fluoroalkyl urethanes, fluoroalkyl-urethane acrylates, fluoroalkyl allyl urethanes and perfluorinated urethane-acrylic copolymers,
• and wherein the cross-linking component is one or more of:
• 4,6-di-(trifluoromethyl)-1,3-benzene diisocyanate, 4,4′-diisocyanatodiphenylether, 3,3′-dichloro-4,4′-diisocyanatodiphenylmethane, 4,5′-diphenyldiisocyanate, 4,4′-diisocyanatodibenzyl, 3,3′-dimethoxy-4,4′-diisocyanatodiphenyl, 2,2′-dichloro-5,5′-dimethoxy-4,4′-diisocyanato diphenyl, 1,3-diisocyanatobenzene, 4-chloro-1,2-naphthylene diisocyanate, and 1,8-dinitro-2,7-naphthylene diisocyanate.