Propylene → Vinylcyclohexane Propylene

Participants

Reaction Steps

Subsequently, in a 3 l-volume SUS-made autoclave equipped with a stirrer whose atmosphere had been displaced with nitrogen were successively charged 1 l of dehydration-purified n-heptane, 8.5 mmol of an organoaluminum compound of formula (C2H5)2Al(OBu)0.3 Cl0.7, 0.85 mmol of methyl toluylate, and 3.44 g of the above-obtained solid catalyst containing the vinylcyclohexane polymer. To the mixture were fed 50 g of propylene and hydrogen at a partial pressure 1.5 atm. to effect polymerization at 60° C. for 4 hours. During the polymerization, propylene was fed so as to maintain the polymerization pressure at 6 kg/cm2G. The polymerization was terminated by addition of 50 ml of butanol, and the inner pressure was released, followed by allowing to stand at 60° C. for 1 hour. The polymerization mixture was taken out and filtered to obtain 233 g of a vinyl-cyclohexane-propylene block copolymer. The polymer had an Mw/Mn of 11.8, a CXS of 1.8%, and an [η] of 1.81 dl/g and contained 13400 ppm of the vinylcyclohexane polymer component.

Provenance & Evidence