Styrene → Styrene

HRID 375607Notes

Reaction equation

HRID 375607 reaction equation
[C:1]([O:8]CCCC)(=[O:7])/[CH:2]=[CH:3]\[C:4]([O-:6])=[O:5].[CH2:13]=[CH:14][C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.C(OOC(C)(C)C)(C)(C)C>C(OCC)(=O)C>[C:1]([OH:8])(=[O:7])/[CH:2]=[CH:3]\[C:4]([OH:6])=[O:5].[CH2:13]=[CH:14][C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1

Participants

6

Reactant 3

HCID 7501StyreneHCID 8033Di-tert-butyl peroxideHCID 86595084Mono-n-butyl maleate

Product 2

HCID 7501StyreneHCID 444266Maleic Acid

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

Into a four-necked flask equipped with a stirrer, reflux condenser, thermometer and gas-inlet tube were introduced 600 parts of ethyl acetate which was heated and kept at 75° to 78° C. under a stream of nitrogen gas. A monomer mixture composed of 249 parts of monobutyl maleate, 151 parts of styrene and 4 parts of di-tert-butyl peroxide as a polymerization initiator was added dropwise into the flask taking about 2 hours to form a polymerization mixture which was agitated for further 2 hours at the same temperature to effect copolymerization of the monomers. After completion of the polymerization reaction, the polymerization mixture was freed from the solvent by stripping under reduced pressure to give a solid copolymeric resin of maleic acid and styrene.

Workup

  1. customInto a four-necked flask equipped with a stirrer
  2. temperaturereflux condenser
  3. temperaturewas heated
  4. customkept at 75° to 78° C. under a stream of nitrogen gas
  5. additionwas added dropwise into the flask
  6. customto form a polymerization mixture which
  7. customcopolymerization of the monomers
  8. customAfter completion of the polymerization reaction

Sources & evidence

ORD record
ord-f0314e24a7e144849ab40b99bce9aafb
Source dataset
uspto-grants-1996_01
Patent number
US05486549

Reaction notes

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