Verfahren zur Aushaertung eines aushaertbaren Kohlenwasserstoff-Hochpolymers

摘要

1,141,226. Polyisocyanate adducts. UPJOHN CO. 12 Jan., 1967 [10 Feb., 1966], No. 1771/67. Heading C2C. [Also in Division C3] " Capped " polyisocyanates are prepared by reacting a polyisocyanate having an average functionality of 2À5 to 4 with a thermally releasable capping agent which is an organic compound containing active hydrogen and reacts with the polyisocyanate to form an adduct. In preparations a polymethylene polyphenyl isocyanate having an average functionality of 2À7 and containing 50 % by weight of methylene bis (phenyl isocyanate) is reacted with (1) #-caprolactam and (2) 2- pyrrolidone or with 8-valerolactam, #-propio. lactam, succinimide, phthalimide, napthalimide, t-butanol, dimethylphenyl carbinol, triphenyl carbinol, diphenylamine, N-phenyl-#- naphthylamine, di-p-tolylamine, N-phenyl toluidine, N-phenyl xylidine, p-nitrosodiphenylamine, N,N1.diphenyl. p-phenylenediamine, 1,2- dihydroquinoline, 1,2-dihydro- 2,2,4-trimethylquinoline, polymerized 1,2- dihydro - 2,2,4 - trimethylquinoline, o-cresol, p-cresol, p-t. butylphenol, 2,6 - di - t. butyl - 4 - methylphenol, 2,21 - methylene bis-(4-t.butyl- 6-methylphenol), 3,31 - di - t.butyl bisphenol A, hydroquinone monobenzyl ether, 2-mercaptobenzothiazole or N-methyl acetamide. In further examples #-caprolactam is reacted with 4,41,411 - methylidyne tri-(phenyl isocyanate), 2,41,411 - methylidyne tri-(phenyl isocyanate), 2,4,41 - triisocyanato diphenyl ether, 1,3,5 - triisocyanato - 5 - methyl diphenyl methane, butane - 1,2,2 - triisocyanate and 4,41 - dimethyl- 2,21 - 5,51 - tetraisocyanato diphenyl methane.