Isobutyl Methacrylate → HCID 86744800, compound

Participants

Reaction Steps

A 60:30:10 (weight percent) isobutylmethacrylate/2-ethylhexylmethacrylate/N,N-dimethylacrylamide copolymer is prepared as follows. Isobutylmethacrylate, 2-ethylhexylmethacrylate, and N,N-dimethylacrylamide are weighed out (relative weight ratios of 60:30:10) and added to a four neck flask fitted with an argon sparge, mechanical stirrer, thermometer and condenser. Toluene is then added to the flask to get a final monomer concentration of 25.0 weight percent. The reaction flask is placed in a 60° C. water bath and the reaction mixture is sparged with argon for two hours while stirring. After two hours, azobisisobutyronitrile ("AIBN") is added to the reaction flask in an amount sufficient to get a final initiator concentration of 0.25 weight percent. The reaction is then stirred for two hours, after which time the reaction flask is removed from the water bath and the reaction mixture is poured into a polyethylene tray, air dried, and dried in a vacuum oven at 120° C. (glass transition temperature is calculated to be approximately 38° C.). Optionally, after two hours of stirring, an additional 0.25% initiator is added and the reaction continued for an additional hour, after which time the copolymer is isolated as before. If higher or lower polymer molecular weight is desired, this may be achieved by altering the level of initiator used or by adding a chain transfer agent (such as decanethiol) to the reaction mixture.

Provenance & Evidence