Oblon, Fisher, Spivak, McClelland & Maier
Process for producing polyurethane resins and sheet materials
 A water-insoluble, water-nondispersible polyurethane resin and a sheet material with improved physical properties and dyeability are produced by using a quaternary nitrogen atom-containing polyol and a low-molecular weight polyfunctional compound having no quaternary or tertiary nitrogen atom. 
Sanyo Chemical Industries, Ltd
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Y10T D01F C08G Y10T C08G C08G C08G Y10T Y10T C08G
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Toshikazu Itsuya
Fujii Tanaka