[CH2:1]([CH2:8][CH2:9]N=C=O)[CH2:2][CH2:3][CH2:4][N:5]=[C:6]=[O:7].N(C1CC(C)(CN=C=O)CC(C)(C)C1)=C=O.C1(CN=C=O)C=CC=C(CN=C=O)C=1.C1(N=C=O)C=CC=C(N=C=O)C=1.C1(N=C=O)C=CC(N=C=O)=CC=1.C1C=C(N=C=O)C2C=CC=C(N=C=O)C=2C=1.[N-]=C=O.[N-]=C=O.COC1C=CC=CC=1C1C=CC=CC=1OC.[N-]=C=O.[N-]=C=O.CC1C=CC=CC=1C1C=CC=CC=1C>>[NH2:5][C:4]1[CH:3]=[CH:2][CH:1]=[CH:8][CH:9]=1.[CH2:6]=[O:7]In the process of claim 5 the further improvement wherein the polyisocyanates are prepared from isocyanates selected from the group consisting of 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, 1-isocyanato-3,3,5-trimethyl-5-isocyanato methyl cyclohexane, m-xylylene diisocyanate and 4,4'-diisocyanato dicyclohexyl methane, 4,4'-diisocyanato diphenyl methane, 1,3-phenylene diisocyanate, 1,4-phenylene diisocyanate, 4,4'-diisocyanate diphenyl ether, 1,5-naphthylene diisocyanate, 1-methoxy-phenyl-2,4-diisocyanate, 4,4'-biphenylene diisocyanate, 3,3'-dimethoxy-4,4'-biphenyl diisocyanate, 3,3'-dimethyl-4,4'-biphenyldiisocyanate, 3,3'-dimethyl-diphenyl methane-4,4'-diisocyanate, 2,4- and 2,6-tolylene diisocyanate or any mixture of these isomers, and polyphenyl-polymethylene-polyisocyanates of the type obtained by condensing aniline with formaldehyde, followed by phosgenation.
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