Azobisisobutyronitrile → HCID 168686, compound

Participants

Reaction Conditions

Reaction Steps

To 1713g of a monomer mixture consisting of 54.3% of butylacrylate, 42.3% of ethylacrylate and 3.4% of acrylic acid was added 40g (2.5%) of azo-bis-isobutyronitrile and 6.8g (0.4%) of lauryl mercaptane at 22° C. The solution was cooled to 10° C. and added dropwise to a stirred and heated reaction vessel with a wall temperature of approximately 70° C. The reaction started immediately. The addition was continued and the reaction vessel cooled at such a rate that the internal temperature remained between 105 and 135° C. Near the end of the addition, the stirring of the polymer becomes very difficult with a single-blade stirrer because of a strong Weissenberg effect. The addition was complete after 3 hours. The polymer was then heated for another 3 hours at 80-100° C. The resulting polymer was a highly viscous material with comonomer proportions of 54:3:42:3:3.4.

Provenance & Evidence