Patent ID: 7166651

Claim:
A dental composition comprising (a) at least one acidic compound selected from the group consisting of (i) an acidic polymerizable monomer containing at least one polymerizable group selected from the group consisting of an acrylate, a methacrylate, and a vinyl group, and at least one acidic moiety selected from the group consisting of where R is an alkyl or aryl group; (ii) a homopolymer/copolymer of an α,β-unsaturated carboxylic acid; (iii) an addition product of a mono- or di-anhydride compound with a hydroxyalkyl(meth)acrylate compound; and (iv) 4-(meth)acryloxyethyltrimellitic anhydride; (b) at least one polymerizable monomer without any acidic group where the polymerizable group is selected from the group consisting of an acrylate, a methacrylate and a vinyl group; (c) a substituted thiourea selected from the group consisting of 1-(2-pyridyl)-2-thiourea and 1-(2-tetrahydrofurfuryl)-2-thiourea; and (d) a hydroperoxide compound with at least one hydroperoxide group attached to a tertiary carbon; the composition being a shelf-stable two-part self-adhering composition wherein a first part of the two part composition comprises the substituted thiourea and the second part of the two part composition comprises the acidic compound and hydroperoxide compound and the first and second parts are physically separated from each other.