Patent ID: 8367742

Claim:
A polymerizable composition comprising: at least one first reactive (meth)acrylate monomer comprising HPMA; at least one second reactive (meth)acrylate monomer selected from the group consisting of hydroxyethylmethacrylate (HEMA), hydroxypropylmethacrylate (HPMA), ethyl methacrylate (EMA), tetrahydrofurfuryl methacrylate (THFMA), pyromellitic dianhydride di(meth)acrylate, pyromellitic dianhydride glyceryl dimethacrylate, pyromellitic dimethacrylate, methacroyloxyethyl maleate, 2-hydroxyethyl methacrylate/succinate, 1,3-glycerol dimethacrylate/succinate adduct, phthalic acid monoethyl methacrylate, acetoacetoxy ethyl methacylate (AAEMA), and mixtures thereof; at least one reactive urethane (meth)acrylate; at least one addition-polymerizable, ethylenically-unsaturated monomer; at least one non-reactive, solvent-dissolvable polymer; and at least one non-reactive solvent; wherein upon exposure to a polymerization accelerant, said polymerizable composition cures to an acrylic thermoset having voids defined therein.