Styrene → Styrenemaleic anhydride

Participants

Reaction Conditions

Reaction Steps

A flask similar to that used in Example A was charged with 156.22 g of styrene, 147.09 g of maleic anhydride, 3.0 g of azobisisobutyronitrile and 2,400 ml of toluene. The mixture was heated at 90° C. for 1.5 hours while agitated under a nitrogen atmosphere so as to carry out the required reaction. After the reaction, the reaction mixture was condensed and petroleum ether about 10 times as much as the condensed mixture by volume was added to the condensed reaction mixture so as to precipitate the resultant cooligomer. The cooligomer thus obtained was washed with 500 g of petroleum ether three times, thereby obtaining 290 g of styrene-maleic anhydride cooligomer (F) having a number average molecular weight of 7,000.

Provenance & Evidence