2-ethylhexanoic acid tin(II) salt → Ethyl carbamate;bis(2-methylprop-2-enoic acid)

Participants

Reaction Steps

To a mechanically-stirred mixture of 28.59 weight parts of trimethylhexamethylene diisocyanate and 0.04 weight part of stannous octoate in a reactor and purged with dry air, there is added 44.80 weight parts of polytetramethylene ether glycol, while maintaining the reaction temperature at 50° to 60° C. After the addition is complete, the mixture is heated to 70° to 80° C. and held for 3 hours. A 26.58 weight parts of hydroxyethyl methacrylate (HEMA) was added and the mixture was stirred at 70° to 80° C. until the percent NCO assay was below 0.01%.

Provenance & Evidence