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

Participants

Reaction Conditions

Reaction Steps

Into an agitator equipped first (feed) reactor containing 68.6 grams of deionized water (D.I.) and 6.67 grams of sodium lauryl sulfate (30% active in water wt./wt.), 5.0 grams of Ethal SA 20, 130.4 grams of ethyl acrylate and 69 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 1340 grams of deionized water and 3.17 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., 27.0 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 is gradually metered at a feed rate of 1.87 g/min. into the second reactor over a period of 30 minutes at a reaction temperature maintained at approximately 85° C. The monomer emulsion is reacted in a first stage polymerization to form linear core polymer particles of ethyl acrylate/methacrylic acid copolymer.

Provenance & Evidence