Acrylic Acid → Acrylic Acid

Participants

Reaction Steps

The preparation of copolymer 4 is repeated, except that the reactor is charged with 3.9 g of maleic anhydride, 3.5 g of 1,2-dimethoxyethylene, 1.4 g of acrylic acid and 133 g of methyl ethyl ketone, and a solution of 35.3 g of maleic anhydride in 57 g of methyl ethyl ketone is then metered in at the same time as 31.7 g of 1,2-dimethoxyethylene, 13 g of acrylic acid and 1.1 g of tert-butyl perpivalate (75% strength in aliphatic hydrocarbon) in 20 g of methyl ethyl ketone. The workup leaves a solution of the polysodium salt of a copolymer of 1,2-dimethoxyethylene, maleic acid and acrylic acid having a solids content of 20%. The K value of the copolymer is 51.7. The amount of residual maleic acid in the copolymer is found to be 0.19%.

Provenance & Evidence