Hello,
I'm trying to synthesize a new monomer using an existing di-isocyanate monomer and an existing acrylate monomer. The acrylate monomer has one hydroxy group, so I should theoretically make 2 urethane bonds from one di-isocyanate monomer and two acrylate monomers.
I am having trouble with the synthesis because urethane synthesis typically proceeds in a matter of minutes, if a catalyst is added (I'm using dibutyltin dilaurate) and if it proceeds under heat. If I run the reaction at 35-40 Celsius, my FT-IR scans show that the isocyanate peak has very little consumption in 24 hours. If I bring the mixture up to about 60 degrees, the acrylate monomer becomes unstable and starts a run away reaction.
Does anyone have any ideas on how to overcome this problem?
Thank you!