Water → Dicyclopentadiene

Participants

Reaction Steps

196 parts maleic anhydride, 278 parts (95% pure) dicyclopentadiene and 36 parts demineralized water were placed into a four-necked flask, and addition reaction was performed under nitrogen stream at 130° C. for 3 hours to obtain an addition product of maleic acid to dicyclopentadiene. Next, 118 parts phthalic anhydride and 124 parts ethylene glycol were added and mixed. Then the mixture was dehydrated and condensed in a widely-used manner under nitrogen stream at 200° C. for 8 hours to obtain a dicyclopentenyl-group-containing unsaturated polyester having an acid value of 25 mgKOH/g and a dicyclopentenyl group ratio of 38 percent by weight. This dicyclopentenyl-group-containing unsaturated polyester was dissolved at 80° C. in a solution in which 0.1 parts hydroquinone is dissolved in 310 parts styrene monomer. A dicyclopentenyl-group-containing unsaturated polyester resin (I) of a viscosity of 3.0 stokes/25° C. was thus obtained.

Provenance & Evidence