Patent ID: 6566481
Filing Date: 2003-05-20
Classification: C08G,Y10T

Abstract:
A polyisocyanate of the formula (I) (polyisocyanate I),OCNâ€”R1â€”[â€”NXâ€”COâ€”Oâ€”R2â€”Oâ€”COâ€”NXâ€”R1â€”]nâ€”NCOâ€ƒâ€ƒ(I) in which the units R1, X and R2 have the following meanings:R1 is a unit of the formula (II) â€”CH2â€”CH2â€”CH2â€”CH2â€”CH2â€”CH2â€”â€ƒâ€ƒ(II) X is hydrogen or a unit of the formula (III) â€”COâ€”NHâ€”R1â€”NCOâ€ƒâ€ƒ(III) with the proviso that at least one of the units X in the polyisocyanates of the formula I is a unit of the formula III; andR2 is a 4-, 5- or 6-membered cycloalkylene radical in which up to 4 hydrogen atoms may be substituted by C1 to C4 alkyl radicals and one or two methylene units may be substituted by an oxygen atom, a sulfur atom and/or a tertiary nitrogen atom which additionally carries a C1 to C4 alkyl radical, or is a C2 to C4 alkylene radical in which inserted between 2 carbon atoms or between one carbon atom and a hydrogen atom there is a 4-, 5- or 6-membered cycloalkylene radical in which up to 4 hydrogen atoms may be substituted by C1 to C4 alkyl radicals and one or two methylene units may be substituted by an oxygen atom, a sulfur atom and/or a tertiary nitrogen atom which additionally carries a C1 to C4 alkyl radical, and the index n is 1, 2 or 3.