Reaktion #430005

Reaktionsgleichung

methanol

benzyl alcohol

Irganox 1076

→

ethyl Methacrylate Benzyl Methacrylate

Lösungsmittel

decalin

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturthe temperature was maintained at 180°-190° C. for 14 hours
2. 2
   Sonstigewas collected
3. 3
   SonstigeThe polymer was precipitated in methanol
4. 4
   Waschenthen washed with hexane
5. 5
   TrocknenAfter drying at 55° C. overnight in an vacuum oven, 404 gram of polymer
6. 6
   Sonstigewere recovered with a DSC melting point of 93°-94° C

Vorschrift

350 grams (3.5 mole) of polymethylmethacrylate (Plexiglass VO 44 from Rohm & Haas), 378 grams of benzyl alcohol (3.5 mole) and 0.54 gram (0.1 mole %) of an antioxidant Irganox 1076 were heated to 180° C. to dissolve them in 550 cc of decalin. 13.86 grams of tetraisopropyl titanate was added and the temperature was maintained at 180°-190° C. for 14 hours, and during this time 23 ml of distillate containing methanol was collected and the reaction was stopped. The polymer was precipitated in methanol then washed with hexane. After drying at 55° C. overnight in an vacuum oven, 404 gram of polymer were recovered with a DSC melting point of 93°-94° C. NMR analysis showed a 22.6% conversion of methyl ester to benzyl ester.

Quelle