Patent ID: 8372896

Claim:
Dental adhesive composition having a pH of at least 5, consisting essentially of an aqueous solution containing (a) 20 to 60 wt % a plurality of different polymerizable N-substituted alkyl acrylic or acrylic acid amide monomers; (b) 3 to 20 wt % a water-soluble polymerizable carboxylic acid; (c) 5 to 45 wt % a water-soluble organic solvent; and (d) 5 to 45 wt % water; and optionally a filler, fluoride containing compound, initiator, stabilizer and/or inhibitor; wherein each of the plurality of different polymerizable N-substituted alkyl acrylic or acrylic acid amide monomers is characterized by one of the following formulas: wherein R 1 and R 2 independently represent a hydrogen atom or a C l to C 8 alkyl group, A represents a divalent substituted or unsubstituted organic residue having from 1 to 11 carbon atoms, whereby said organic residue may contain from 1 to 3 oxygen and/or nitrogen atoms, Z represents a saturated at least trivalent, substituted or unsubstituted C 1 to C 8 hydrocarbon group, a saturated at least trivalent substituted or unsubstituted cyclic C 3 to C 8 hydrocarbon group, and n is at least 3.