Methanol → Vinyl acetate sodium ethylenesulfonate

HRID 1076947

Reaction equation

HRID 1076947 reaction equation
CO.[C:3]([O:6][CH:7]=[CH2:8])(=[O:5])[CH3:4].[CH2:9]=[CH:10][S:11]([O-:14])(=[O:13])=[O:12].[Na+:15].CC(N=NC(C#N)(C)C)(C#N)C>O>[C:3]([O:6][CH:7]=[CH2:8])(=[O:5])[CH3:4].[CH2:9]=[CH:10][S:11]([O-:14])(=[O:13])=[O:12].[Na+:15]

Participants

6

Reactant 4

HCID 887MethanolHCID 6547AzobisisobutyronitrileHCID 7904Vinyl AcetateHCID 3270262Sodium vinylsulfonate

Product 1

HCID 131710246Vinyl acetate sodium ethylenesulfonate

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

The same vessel as in Example 1 was charged with 130 g. of methanol, 25 g. of water, 320 g. of vinyl acetate, 15 g. of 30% aqueous solution of sodium ethylenesulfonate and 2.8 g. of azobisisobutylonitrile, and polymerization was carried out at a temperature of 70°C. for 3 hours. After adding 2.8 g. of 30% aqueous solution of sodiem ethylenesulfonate to the vessel, the polymerization was further continued for 5 hours to give vinyl acetate-sodium ethylenesulfonate copolymer containing 2.3% by mole of sodium ethylenesulfonate unit. Then the copolymer was hydrolyzed by a conventional method to give a modified PVA of which degree of hydrolysis was 92% by mole.

Workup

  1. additionThe same vessel as in Example 1 was charged with 130 g
  2. additionAfter adding 2.8 g

Sources & evidence

ORD record
ord-f9187d3515574dbcb67370c707e80486
Source dataset
uspto-grants-1976_05
Patent number
US03959205

Linked notes

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