HCID 86754659, compound → O,alpha-dimethylstyrene

Participants

Reaction Steps

90 g of isopropenyltoluene, 10 g of C5 fraction (n-pentane/isoprene/1,3-pentadiene/cyclopentadiene=5/6/3/3) obtained by thermal cracking of petroleum naphtha, and 150 g of toluene were charged into an autoclave, and the mixture was reacted by adding in drops, as a catalyst, 1.5 g of BF3 phenol complex over a period of about 10 minutes, keeping the temperature at 0° C. while stirring. Then, the stirring was continued for another 3 hours. Then, 50 ml of a 5 wt % aqueous sodium hydroxide solution was added, and after the mixture was vigorously stirred for 30 minutes to decompose the catalyst, the aqueous phase was separated and polymer oil was obtained. Further, after the polymer oil was washed with water until it became neutral, and the unreacted oil and solvent were distilled off under reduced pressure with heating to obtain a hydrocarbon resin in the form of a white lump. This resin had a softening point Tm of 125° C., a number average molecular weight of 1150, and a weight average molecular weight Mw of 1950.

Provenance & Evidence