Methacrylic Acid → HCID 18364573, compound

Participants

Reaction Steps

The same reaction apparatus as in Reference Example 4 was used, and the stirrer was operated at 250 to 300 rpm. Under a nitrogen atmosphere, 21.3 g of tert-butyl methacrylate, 5 g of methyl methacrylate, 4.3 g of methacrylic acid (the mole ratio of the three monomers being 6:2:2), 0.3 g of benzoyl peroxide, 0.2 ml of n-dodecyl mercaptan, and 0.8 g of polyethylene oxide (POLYOX-WSR-N-80, molecular weight 2×105, a product of Union Carbide Corporation, U.S.A.) were added, and subjected to pearl polymerization at 75° to 80° C. for 3 hours, filtered and washed with water to yield 25.3 g of tert-butyl methacrylate-methyl methacrylate-methacrylic acid copolymer as white beads. Yield 83%. Acid value 82.2. [η]DMF25°C. =0.176 (DMF is an abbreviation for N,N-dimethyl formamide). The IR characteristic absorptions were the same as those in Reference Example 4.

Provenance & Evidence