Methacrylic Acid → HCID 18373619, compound

Participants

Reaction Steps

A reactor equipped with a nitrogen inlet and a stirrer was charged under a nitrogen atmosphere with 535 g of water, 9.2 g of benzyl methacrylate, 15 g of methyl methacrylate, 12.9 g of methacrylic acid (the mole ratio of the three monomers charged being 6:2:2), 1 g of benzoyl peroxide, 0.3 ml of n-dodecyl mercaptan, and 2.4 g of polyethylene oxide (Polyox-WSR-N-80, molecular weight 2×105, a product of Union Carbide Corporation, U.S.A.), and the monomers were polymerized for 5.5 hours at a stirring speed of 700 to 800 rpm. The resulting product was separated by filtration, washed with water and dried to yield 94 g (88% yield) of benzyl methacrylate-methyl methacrylate-methacrylic acid copolymer as white beads. [η]MC25°C. =0.231. Acid value 40.8. Content of methoxy=3.23%. From the acid value and the methoxy content, the ratio of the constituent monomers in the copolymer II was determined to be: benzyl methacrylate: methyl methacrylate: methacrylic acid of 7.3: 1.6: 1.1.

Provenance & Evidence