UEberzugsmasse,Schichtstoff und Verfahren zur Herstellung des Schichtstoffs

摘要

1,166,571. Coatings. GENERAL TIRE & RUBBER CO. 22 Jan., 1968 [23 Jan., 1967], No. 3344/68. Heading B2E. [Also in Division C3] Substrates may be coated with a composition comprising a polyesterurethane prepolymer, a hydroxyl containing acrylate terpolymer, a volatile organic solvent and a catalyst for the urethane reaction and the composition heated on the substrate to 140 to 300‹F. The prepolymer is prepared by reacting a polyester derived from a C 4-10 saturated aliphatic dicarboxylic acid and a C 2-6 saturated aliphatic glycol and having a M.W. of 1000 to 4000 with an aliphatic diisocyanate containing from 4 to 14 carbon atoms between the isocyanate groups, the mol ratio of diisocyanate to polyester being from 1.5:1 to 2:1. The acrylate terpolymer is prepared from 7.5 to 18 mol % of a monomer of formula: 30 to 45 mol % of a monomer of formula: and 40 to 55 mol % of a monomer of formula: where R is hydrogen or a methyl or ethyl radical, R1 has the formula -[R a O] x -[R 6 ]- OH wherein R a is an alkylene group of 2 or 3 carbon atoms, R b is an alkylene group of 2 to 4 carbon atoms and x is 0 or 1, R11 is a C 1-4 alkyl group and R111 is a methyl or ethyl radical, the terpolymer having an inherent viscosity (0.3% in THF) of 0.3 to 0.75 and a hydroxyl number of 30 to 90. In Examples an elastomeric scuff resistant urethane laminate (4 oz./sq. yd. embossed urethane skin on a flexible napped knit fabric made with a blend of nylon and rayon fibres) is coated with various prepolymer/terpolymer compositions (see Division C3). Other substrates which may be coated are non-woven, felted, woven or knitted fabrics of natural and synthetic materials, such as cotton, glass, wool, linen, jute, silk, rayon, nylon, polyester, Spandex, and polyacrylonitrile fibres. Another flexible laminate which may be coated comprises (1) a scuff resistant polyesterurethane layer, (2) a tie coat or layer of a thermoplastic polyurethane, (3) a blown or porous and fused polyvinyl chloride plastisol layer or a calendered plasticized vinyl having a blowing agent incorporated or being a foam and (4) a bottom layer of knit cotton or other fabric. The composition may also be coated on polyvinyl chloride or polyvinyl chloride-vinyl acetate layers.