Patent ID: 6054524
Filing Date: 2000-04-25
Classification: C08L,C09D

Abstract:
A process for applying a rubbery coating to a substrate which comprises: (1) applying to the surface of the substrate a plastisol composition which is comprised of (i) polyvinyl chloride, (ii) optionally, from about 60 to about 100 parts by weight of a primary plasticizer per 100 parts by weight of the polyvinyl chloride, (iii) from about 1 to about 3 parts of a stabilizer per 100 parts by weight of the polyvinyl chloride, (iv) from about 2 to about 100 parts by weight of a paraffinic solvent or a secondary plasticizer per 100 parts by weight of said primary plasticizer and (v) from about 35 to about 50 parts by weight of a powdered crosslinked nitrile rubber per 100 parts of the polyvinyl chloride, wherein the powdered crosslinked nitrile rubber is comprised of repeat units which are derived from (a) 1,3-butadiene, (b) acrylonitrile and (c) a crosslinking agent, wherein said powdered crosslinked nitrile rubber has a Mooney viscosity which is within the range of about 50 to about 120, a swelling index of less than about 20 percent, a mill shrinkage of less than about 30 percent, a gel content of greater than 80 percent and a particle size of no greater than about 250 microns; (2) heating the plastisol-coated substrate to a temperature which is within the range of about 150.degree. C. to about 200.degree. C. for a period which is sufficient to fuse the plastisol composition to the substrate producing a rubber-coated substrate.