Reaktion #219202

Reaktionsgleichung

acrylate

isocyanate

dibutyltin laurate

isocyanate

→

Urethane Acrylate

Lösungsmittel

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeair was purged through the reaction mixture
2. 2
   workup.ADDITIONwas added
3. 3
   Temperaturthe temperature of the kettle was increased to 77° C
4. 4
   Sonstigea sample was withdrawn for analysis

Vorschrift

A quantity of 0.1 moles of isocyanate terminated prepolymer and 0.1 ml of dibutyltin laurate were charged to a 500 ml glass kettle. The mixture was heated at 70° C. and air was purged through the reaction mixture and a solution of diol (0.05 moles) was added dropwise while the mixture was stirred at 200 RPM. After a two hour reaction, hydroyethyl acrylate (0.1 moles) was added to cap the residual isocyanate and the temperature of the kettle was increased to 77° C. After another two hours, a sample was withdrawn for analysis. The remainder was transferred to a bottle and stored in darkness.

Quelle