Reaktion #461738

Reaktionsgleichung

trimethylcyclohexyl methacrylate

m-isopropenyl-α,α-dimethylbenzyl isocyanate

→

α-methylstyrene

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeare placed in a 100 mL 3-neck round bottom flask
2. 2
   Sonstigefitted with a mechanical stirrer, gas inlet tube
3. 3
   SonstigeThe ice-water bath is removed
4. 4
   workup.STIRRINGthe contents are stirred for an additional 4 hours

Vorschrift

56.52 g (32.0 m moles) of the aminopropyl-capped PDMS of Example 1 are placed in a 100 mL 3-neck round bottom flask fitted with a mechanical stirrer, gas inlet tube and thermometer. The diamine is cooled with an ice-water bath and kept under a dry air atmosphere. 12.90 g (64.1 m moles) of m-isopropenyl-α,α-dimethylbenzyl isocyanate (TMI) are added while stirring. After 2 hours the mixture becomes very thick and 69.42 g of trimethylcyclohexyl methacrylate (TMMA) are added. The ice-water bath is removed and the contents are stirred for an additional 4 hours to yield a 66.1% solution of α-methylstyrene capped poly(dimethylsiloxane) in TMMA.

Quelle