Methacrylic Acid → Methacrylic Acid

HRID 921589Notes

Reaction equation

HRID 921589 reaction equation
[Na:1].[CH2:2]1[O:4][CH2:3]1.[C:5]([OH:10])(=[O:9])[C:6]([CH3:8])=[CH2:7].[CH2:11]=[CH:12][C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.S(OOS([O-])(=O)=O)([O-])(=O)=O.[NH4+].[NH4+]>O>[CH:11]([CH2:7][C:6](=[CH2:8])[C:5]([OH:10])=[O:9])=[CH:12][C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.[Na:1].[CH2:3]1[O:4][CH2:2]1.[C:5]([OH:10])(=[O:9])[C:6]([CH3:8])=[CH2:7]

Participants

9

Reactant 5

HCID 4093Methacrylic Acid2×HCID 6354Ethylene OxideHCID 7501StyreneHCID 62648Ammonium Persulfate2×HCID 5360545Sodium

Product 3

HCID 4093Methacrylic AcidHCID 6354Ethylene OxideHCID 86592924Styrene-methacrylic acid sodium

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A reactor equipped with a stirring rod and a thermometer was charged with 683 parts of water, 11 parts of sodium salt of sulfuric acid ester of ethylene oxide adduct of methacrylic acid (ELEMINOL RS-30, manufactured by Sanyo Chemical Industries, Ltd.), 138 parts of styrene, 138 parts of methacrylic acid, and 1 part of ammonium persulfate. It was stirred at 400 rpm for 15 minutes, and white emulsion was obtained. It was heated such that a temperature in the system reached to 75° C. and was reacted for 5 hours. Further, after adding 30 parts of a 1-% aqueous solution of ammonium persulfate, it was aged at 75° C. for 5 hours, and [Fine Particles Dispersion 1] as an aqueous dispersion of a vinyl resin (a copolymer of styrene-methacrylic acid-sodium salt of sulfuric acid ester of ethylene oxide adduct of methacrylic acid) was obtained. A volume-average particle diameter of [Fine Particles Dispersion 1] measured by LA-920 was 0.14 μm. A part of [Fine Particles Dispersion 1] was dried, and a resin component was isolated.

Workup

  1. customA reactor equipped with a stirring rod
  2. customwhite emulsion was obtained
  3. temperatureIt was heated such that a temperature in the system
  4. customreached to 75° C.
  5. customwas reacted for 5 hours
  6. waitwas aged at 75° C. for 5 hours

Sources & evidence

ORD record
ord-9609d16fff0b438fbdc81fd4c20140c0
Source dataset
uspto-grants-2016_03
Patent number
US09274445B2

Reaction notes

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