Methyl Methacrylate → Methyl 2-methylprop-2-enoate;styrene

HRID 257549Notes

Reaction equation

[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[C:9]([O:14][CH3:15])(=[O:13])[C:10]([CH3:12])=[CH2:11]>C[O-].C[O-].C[O-].C[Ti](C)(C)(C)(C)C1C=CC=C1.CO>[CH3:12][C:10]([C:9]([O:14][CH3:15])=[O:13])=[CH2:11].[CH2:1]=[CH:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1

Participants

Conditions

Temperature: 40 °C

Procedure

In a 0.5-liter reactor equipped with a stirrer were placed 100 ml of styrene and 10.0 mmol as aluminum atom of methylaluminoxane obtained in the above Example 1 (1), and the resultant was stirred at the polymerization temperature of 40° C. for 30 minutes. Subsequently, 0.05 mmol as titanium atom of pentamethylcyclopentadienyltitanium trimethoxide was added, followed by 100 ml of methyl methacrylate. Then, polymerization was carried out at 70° C. for 4 hours with stirring. After the reaction was over, methanol was poured to stop the reaction. Further, a mixture of methanolhydrochloric acid was added to decompose the catalyst components. Then, washing with methanol was repeated three times. The yield of thus obtained styrene-methyl methacrylate copolymer was 4.3 g. Intrinsic viscosity measured in 1,2,4-trichlorobenzene at 135° C. was 0.48 dl/g.

Workup

customIn a 0.5-liter reactor equipped with a stirrer
customThen, polymerization
waitwas carried out at 70° C. for 4 hours
stirringwith stirring
additionwas poured
customthe reaction
additionFurther, a mixture of methanolhydrochloric acid
additionwas added
washThen, washing with methanol
custommeasured in 1,2,4-trichlorobenzene at 135° C.

Sources & evidence

ORD record: ord-23e0916bba1f41c3a7e54555d9e29283
Source dataset: uspto-grants-1993_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05262504

Reaction notes

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