公开(公告)号：US3927041A

公开(公告)日：1975-12-16

申请号：US40248773

申请日：1973-10-01

Applicant: STANDARD OIL CO

Inventor： CENGEL JOHN A ,  PUSKAS IMRE

IPC: C07C51/567 ,  C08F8/46 ,  C07D307/60

CPC classification number: C07C51/567 ,  C08F8/46 ,  C07C57/13 ,  C08F110/08

Abstract: Viscous polybutenes of number average molecular weight (Mn) in the range of about 300 to about 3,000 have improved reactivity with intramolecular anhydrides of unsaturated aliphatic dicarboxylic acids when such polybutenes contain rather small amounts, i.e., 5 to 200 ppm, of brominated dialkylhydantoin. Preference is given to such bromine containing compounds having a sufficient vapor pressure at a temperature in the range of 100* to 300*C. to be substantially completely removed at absolute pressures in the range of 5 to 760 mm Hg. Use of such polybutenes containing such brominated compounds in the addition reaction with said unsaturated anhydrides can reduce formation of undesired tarry product resulting from polymerization and/or thermal decomposition of the unsaturated anhydrides and enhance yield of desired alkenyl-substituted anhydride.

Abstract translation: 数均分子量（Mn）在约300至约3,000范围内的粘性聚丁烯与不饱和脂族二羧酸的分子内酸酐具有改善的反应性，当这种聚丁烯含有相当少的量即5至200ppm溴化二烷基乙内酰脲时。 优选这样的含溴化合物，其具有在100至300℃的温度范围内的足够的蒸汽压，以在5至760mm Hg的绝对压力下基本上完全除去。 在与所述不饱和酸酐的加成反应中使用含有这种溴化化合物的这种聚丁烯可以减少由不饱和酸酐的聚合和/或热分解产生的不期望的焦油产物的形成并提高所需的链烯基取代的酸酐的产率。