Methacrylic Acid → 2-Methylprop-2-enoic acid--ethyl prop-2-enoate (1/1)

HRID 1185985Notes

Reaction equation

HRID 1185985 reaction equation
S([O-])(OCCCCCCCCCCCC)(=O)=O.[Na+].[C:19]([O:23][CH2:24][CH3:25])(=[O:22])[CH:20]=[CH2:21].[C:26]([OH:31])(=[O:30])[C:27]([CH3:29])=[CH2:28].S(OOS([O-])(=O)=O)([O-])(=O)=O.[NH4+].[NH4+]>O>[C:19]([O:23][CH2:24][CH3:25])(=[O:22])[CH:20]=[CH2:21].[C:26]([OH:31])(=[O:30])[C:27]([CH3:29])=[CH2:28]

Participants

6

Reactant 4

HCID 4093Methacrylic AcidHCID 8821Ethyl AcrylateHCID 62648Ammonium PersulfateHCID 3423265Sodium Lauryl Sulfate2×

Product 1

HCID 1076652-Methylprop-2-enoic acid--ethyl prop-2-enoate (1/1)

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Conditions

Temperature
85 °C

Procedure

A three stage polymer is made as follows: Into an agitator equipped first (feed) reactor containing 34.3 grams of deionized water (D.I.) and 3.3 grams of sodium lauryl sulfate (30% active in water wt./wt.), 2.5 grams of Ethal SA-20, 65.1 grams of ethyl acrylate and 34.5 grams of methacrylic acid are added under nitrogen atmosphere and mixed at 500 rpm to form a monomer emulsion. To an agitator equipped second reactor are added 600 grams of deionized water and 1.27 grams of sodium lauryl sulfate (30% active in water wt./wt.). The contents of the second reactor are heated with mixing agitation (200 rpm) under a nitrogen atmosphere. When the contents of the second reactor reaches a temperature of approximately 84° C., 11.0 grams of an ammonium persulfate solution (2.0% aqueous solution wt./wt.) is injected into the heated surfactant solution. The monomer emulsion from the feed reactor (maintained at approximately 85° C.) is gradually metered at a feed rate of 0.94 g/min. into the second reactor over a period of 15 minutes. The monomer emulsion is reacted in a first stage polymerization to form linear core polymer particles of ethyl acrylate/methacrylic acid copolymer.

Workup

  1. customInto an agitator equipped first (feed) reactor
  2. additionare added under nitrogen atmosphere
  3. additionmixed at 500 rpm
  4. customto form a monomer emulsion
  5. customTo an agitator equipped second reactor
  6. temperatureThe contents of the second reactor are heated
  7. additionwith mixing agitation (200 rpm) under a nitrogen atmosphere
  8. customThe monomer emulsion is reacted in a first stage polymerization

Sources & evidence

ORD record
ord-84b700dd993e4c29867b9e34d44f9a58
Source dataset
uspto-grants-2014_03
Patent number
US08673277B2

Reaction notes

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