British Patent Specification No. 1,113,722 Aerobically Polymerisable Compositions, published May 15, 1968 discloses the polymerization of acrylate monomers through the use of a free-radical catalyst (e.g., peroxides) and triarylborane complexes having the general formula (R)3 B-Am wherein R is an aryl radical and Am is an amine.