Methacrylic Acid → Methacrylic Acid

HRID 871796Notes

Reaction equation

HRID 871796 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.C(OCCCC)(=O)C=C.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

10

Reactant 6

HCID 4093Methacrylic Acid2×HCID 6354Ethylene OxideHCID 7501StyreneHCID 8846Butyl AcrylateHCID 62648Ammonium Persulfate2×HCID 5360545Sodium

Product 3

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

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
75 °C

Procedure

Into a reaction vessel to which a stirring rod and a thermometer had been set, 683 parts by mass of water, 14 parts by mass of sodium salt of sulfuric acid ester of ethylene oxide adduct of methacrylic acid (“ELEMINOL RS-30,” product of Sanyo Chemical Industries Ltd.), 137 parts by mass of styrene, 55 parts by mass of butyl acrylate, 83 parts by mass of methacrylic acid, 8 parts by mass of n-dodecymercaptan (“THIOKALCOL 20,” product of Kao Corporation) and 1.2 parts by mss of ammonium persulfate were charged, and then stirred at 400 rpm for 15 min to thereby obtain a white emulsion. The resultant emulsion was heated to a system temperature of 75° C. and was allowed to react for 4 hours. Then, 30 parts by mass of a 1% by mass aqueous ammonium persulfate solution was added thereto, followed by aging at 71° C. for 6 hours, to thereby obtain an aqueous dispersion liquid (fine organic resin particle dispersion liquid (1)) of vinyl resin particles (copolymer of styrene-methacrylic acid-sodium salt of sulfuric acid ester of ethylene oxide adduct of methacrylic acid). The solid content concentration of the obtained fine organic resin particle dispersion liquid (1) was found to be 30% by mass. Some of the fine organic resin particles contained in the fine organic resin particle dispersion liquid (1) were dried to isolate the resin. The isolated resin was then measured for glass transition temperature (Tg) and weight average molecular weight (Mw), which were found to be 90° C. and 8,000, respectively.

Workup

  1. customInto a reaction vessel to which a stirring rod and a thermometer had been set
  2. customto thereby obtain a white emulsion
  3. customto react for 4 hours
  4. waitby aging at 71° C. for 6 hours

Sources & evidence

ORD record
ord-9ace4c60264b439b981120a03b3ebcbd
Source dataset
uspto-grants-2015_03
Patent number
US08973759B2

Reaction notes

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