Patent ID: 8664294

Claim:
A self-etching and bonding dental resin cement composition, comprising: a two-paste system that is combined prior to use, wherein a first catalyst paste comprises a first polymerizable resin composition, a first filler, and a peroxide free radical polymerization initiator, and wherein a second base paste comprises a second polymerizable resin, a second filler, a free radical polymerization accelerator, and optionally a photoinitiator, wherein the first polymerizable resin composition comprises, based on 100 weight percent: about 5 to about 50 weight percent of a polymerizable (meth)acrylate trimellitic acid/anhydride selected from 4-(meth)acryloyloxymethyltrimellitic acid; 4-(meth)acryloyloxymethyltrimellitic anhydride; 4-(meth)acryloyloxyethyltrimellitic acid; 4-(meth)acryloyloxyethyltrimellitic anhydride; 4-(meth)acryloyloxypropyltrimellitic acid; 4-(meth)acryloyloxypropyltrimellitic anhydride; or a combination thereof; about 5 to about 20 weight percent of a phosphoric acid (meth)acrylate; about 5 to about 25 weight percent of a hydroxyalkyl(meth)acrylate; and the balance being one or more first copolymerizable multi-functional (meth)acrylates, and wherein the second polymerizable resin composition comprises, based on 100 weight percent: about 50 to about 95 weight percent of one or more second copolymerizable multi-functional (meth)acrylates; and about 5 to about 50 weight percent diluent.