Azobisisobutyronitrile → Diethyl carbonate ethylene carbonate

Temperature

70 °C

60.0 g of methyl methacrylate, 16.0 g of 3-ethyl-3-oxetanylmethyl methacrylate, 4.0 g of 3,4-epoxycyclohexylmethyl acrylate, 226.6 g of ethylene carbonate and 0.15 g 2,2′-azobis(isobutyronitrile) were placed in a 500 mL capacity three-necked flask equipped with a refluxing condenser and stirred and mixed for 30 minutes while nitrogen gas was introduced into the flask. Then the resulting mixture was heated to 70° C. and radical polymerization was carried out over 8 hours at the temperature. The resulting reaction mixture was cooled to 40° C. 226.6 g of diethyl carbonate and 0.15 g of 2,2′-azobis(isobutyronitrile) were added to the reaction mixture and the resulting mixture was again heated to 70° C. to carry out radical polymerization at the temperature for another 8 hours. Then the resulting reaction mixture was cooled to 40° C. to obtain a solution of a polymer in a concentration of 15% by weight in a solvent of ethylene carbonate/diethyl carbonate mixture.

1. customequipped with a refluxing condenser
2. additionmixed for 30 minutes while nitrogen gas
3. additionwas introduced into the flask
4. customradical polymerization
5. customThe resulting reaction mixture
6. temperaturewas cooled to 40° C
7. temperaturethe resulting mixture was again heated to 70° C.
8. custompolymerization at the temperature for another 8 hours
9. customThen the resulting reaction mixture
10. temperaturewas cooled to 40° C.

ORD record

ord-47bd86735c44470298473cbb422792dd

Source dataset

uspto-grants-2012_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08277897B2