2-Butanone oxime → Urethane acrylate

Participants

Reaction Steps

Into a four-necked flask provided with a stirrer, a condenser and a thermometer are charged 1500 parts of 3-methylpentane adipate having a molecular weight of 500, 134 parts of trimethylol propane and 1464 parts of tetramethylxylylene isocyanate. Thereafter, they are warmed to 100° C. and reacted for 5 hours to obtain polyfunctional terminal isocyanate prepolymer (ratio of NCO content 4.1%). Then, the temperature of the product is rendered into 60° C. and 174 parts of β-hydroxyethyl methacrylate is added to conduct the reaction for 2 hours. Thereafter, 130 parts of methylethyl ketoxime is further added to conduct the reaction for 2 hours, whereby there is obtained urethane acrylate.

Provenance & Evidence