Methyl Acrylate → Vinyl acetate methylacrylate

HRID 1748418Notes

Reaction equation

HRID 1748418 reaction equation
[C:1]([O:5][CH3:6])(=[O:4])[CH:2]=[CH2:3].[C:7]([O:10][CH:11]=[CH2:12])(=[O:9])[CH3:8]>S([O-])([O-])(=O)=O.[Na+].[Na+].O>[C:7]([O:10][CH:11]=[CH2:12])(=[O:9])[CH3:8].[C:1]([O:5][CH3:6])(=[O:4])[CH:2]=[CH2:3]

Participants

5

Reactant 2

HCID 7294Methyl AcrylateHCID 7904Vinyl Acetate

Product 1

HCID 22592697Vinyl acetate methylacrylateYield 138.4%

Reagents, catalysts & solvents 2

HCID 24436Sodium SulfateCatalystHCID 962WaterSolvent

Procedure

768 g of water and 12 g of anhydrous sodium sulfate were charged in a 2 L reactor equipped with a stirrer, a thermometer, a N2 gas introduction pipe, a reflux condenser and a dropping funnel, and the interior was purged with N2 gas for deoxidation. Subsequently, 1 g of a partially saponified polyvinyl alcohol (saponification degree: 88%) and 1 g of lauryl peroxide were charged and the inside temperature was elevated to 60° C. After that, monomers consisting of 104 g (1.209 mol) of methyl acrylate and 155 g (1.802 mol) of vinyl acetate were dropped through a dropping funnel over 4 hours. In the course of dropping polymerization, the inside temperature was kept at 60° C. with a stirring rotation speed of 600 rpm. After the dropping polymerization was completed, the inside temperature was kept for 2 hours at 65° C. Subsequently, dehydration was carried out by centrifugation. As a result, 288 g of a vinyl acetate/methyl acrylate copolymer (water content: 10.4%) was obtained. The vinyl acetate/methyl acrylate copolymer had a mass average particle size of 180 μm.

Workup

  1. customequipped with a stirrer
  2. customa thermometer, a N2 gas introduction pipe, a reflux condenser and a dropping funnel, and the interior was purged with N2 gas for deoxidation
  3. additionSubsequently, 1 g of a partially saponified polyvinyl alcohol (saponification degree: 88%) and 1 g of lauryl peroxide were charged
  4. customwas elevated to 60° C
  5. additionwere dropped through a dropping funnel over 4 hours
  6. custompolymerization
  7. customwas kept at 60° C. with a stirring rotation speed of 600 rpm
  8. customAfter the dropping polymerization

Sources & evidence

ORD record
ord-698791cd74984014a2b1203d0a29babb
Source dataset
uspto-grants-2015_10
Patent number
US09150679B2

Reaction notes

Loading…