Methacrylic Acid → HCID 20574609, compound

Participants

Reaction Steps

The same apparatus as used in Reference Example 2 was charged under a nitrogen atmosphere with 565 g of water, 97.2 g of benzyl methacrylate, 21.3 g of tert-butyl methacrylate, 12.9 g of methacrylic acid (the mole ratio of the monomers charged being 6:2:2), 1.0 g of benzoyl peroxide, 0.3 ml of n-dodecyl mercaptan, and 2.4 g of polyethylene oxide (described hereinabove), and the monomers were polymerized for 6 hours at 75° to 80° C. at a stirring speed of 700 to 800 rpm. The product was separated by filtration, washed with water and dried to afford 95 g of benzyl methacrylate-tert-butyl methacrylate-methacrylic acid copolymer as white beads. Yield 83.8%. [η]MC25°C. =0.293. Acid value 66.4. tert-Butoxy content=11.0%. From the acid value and the alkoxy content, the ratio of the monomers benzyl methacrylate:tert-butyl methacrylate:methacrylic acid=5.9:2.3:1.8.

Provenance & Evidence