Reaktion #468381

Reaktionsgleichung

isophorone diisocyanate

di-n-butyltin dilaurate

2-hydroxyethyl acrylate

hydroquinone monomethylether

→

urethane diacrylate

Lösungsmittel

n-butyl acetate

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeInto a 1-liter 3-necked flask provided with a stirrer
2. 2
   workup.ADDITIONadding dropwise
3. 3
   workup.ADDITIONAfter completion of the dropwise addition
4. 4
   Sonstigewas reduced to 60° C.
5. 5
   TemperaturSince the viscosity increased
6. 6
   workup.WAITthe reaction was continued for 5 hours at 70° C.

Vorschrift

Into a 1-liter 3-necked flask provided with a stirrer and thermometer were metered in 425 parts of dodecabutyleneglycol (tradename: PTG-850, manufactured by Hodogaya Chemical Industries Co., Ltd, molecular weight 850), 0.43 parts of di-n-butyltin dilaurate, 0.4 parts of hydroquinone monomethylether, followed by stirring at 55° C. and adding dropwise, 222 parts of isophorone diisocyanate in 3 hours. After completion of the dropwise addition, the reaction was further continued for 3 hours at 70° C. and then temperature was reduced to 60° C., then 122 parts of 2-hydroxyethyl acrylate was added dropwise in 2 hours. Since the viscosity increased, 193 parts of n-butyl acetate was added and the reaction was continued for 5 hours at 70° C. to give an urethane diacrylate (UPA-2) with a solids concentration of 80% by weight.

Quelle