Abstract: Two component adhesive formulations are described that can be mixed to form compositions containing a curable liquid resin binder and filler. The liquid resin binder comprises from about 1% to about 60% of a lower alkoxy, lower alkyl methacrylate comprising methoxyethyl methacrylate, and from about 40% to about 99% of a polyunsaturated agent selected from the group consisting of aliphatic or aromatic diacrylates or dimethacrylates or mixtures thereof, the percentages being by weight based on the liquid resin binder. The filler forms up to 80% by weight of the adhesive composition and consists of finely divided inorganic filler, finely divided organic filler that may be soluble in the liquid resin binder, and mixtures thereof. The preferred compositions are useful as orthodontic adhesives and contain from about 10% to about 50% by weight of the liquid resin binder of methoxyethyl methacrylate.

Abstract: In an adhesive having two curable components designed to be coated in separate layers on one or more of two surfaces to be joined, and cured upon contact of the layers with each other, one component is a curable liquid primer having a viscosity of at least 800 cps but no more than about 50,000 cps at 23.degree. C., and the second component is a paste having a viscosity of at least 100,000 cps at 23.degree. C. The primer is formulated with a curable liquid monomer component of which at least 30% is an alkoxy alkyl methacrylate, any balance of curable monomer in the primer comprising monomer that is capable of copolymerizing with the first-named monomer and/or cross-linking with it. Also covers the method for joining together two irregular surfaces, utilizing such an adhesive formulation. Particularly intended for orthodontic adhesive applications.