DENTAL RESTORATIVE COMPOSITION

摘要

A polymerizable composition is described which comprises at least one methacrylate monomer having 2-4 polymerizable olefinic bonds and at least one free-radical liberating polymerization catalyst capable when activated of initiating polymerization of said monomer or monomers, the catalyst being present in amounts sufficient to achieve a predetermined note and/or degree of polymerization, the said monomer or monomers having been treated with a sulphonic acid type cation-exchange resin in free acid form. This composition is stable against premature activation of the catalyst and consequent premature polymerization.