Methyl Methacrylate → HCID 19860278, compound

Participants

Reaction Steps

A Liquid Rubber was prepared by free radical polymerization in a continuous flow stirred tank reactor (CFSTR) as follows. A monomer mixture was prepared from n-butyl acrylate (BA), methyl methacrylate (MMA), and glycidyl methacrylate (GMA) in a weight ratio of 90:5:5. Di-tertiary butyl peroxide (DTBP, 4 weight percent based on the total weight of the monomer) and a solvent/chain transfer agent (xylene, 20 weight percent based on the total weight of monomer charged) was added to the mixture in a glass vessel. The mixture was purged with an inert gas, nitrogen, then degassed and stored under a nitrogen blanket. The reactor was set at an external pressure, via the grove valve, of 125 psi and a constant temperature of 200° C. Within a few seconds of the temperature becoming stable, the monomer mixture was introduced continuously into the reactor through a high capacity pump (flow rate=60 grams/minute). The entire mixture was agitated at 300 rpm. The mixture was polymerized within 10 minutes, resulting in a 92-95 weight percent monomer conversion. The residual monomer and solvent was removed by vacuum devolatilization to yield the finished product, p(BA/MMA/GMA) having a weight ratio of 90/5/5.

Provenance & Evidence