Abstract: The present invention relates to redox-curing type nonaqueous curable compositions having: at least one liquid radical polymeric monomer (a); an organic peroxide (b); and a powdered water-soluble reducing compound (c), where the powdered water-soluble reducing compound (c) is dispersed in the liquid radical polymeric monomer (a).

Abstract: The present invention relates to processes of making a cured dental adhesive compositions, in contact with a wetting material surface, by contacting the wetting material surface having water present on the surface with a nonaqueous composition including at least one liquid radical polymeric monomer (a), an organic peroxide (b), and a water-soluble reducing compound (c) in the form of a solid, where the water-soluble reducing compound (c) is dispersed in the liquid radical polymeric monomer (a); and solvating the water-soluble reducing compound (c) present at an interface between the redox-curing nonaqueous curable composition and the wetting material with the water present on the wetting material surface.

Abstract: A nonaqueous curable composition including a liquid radical polymeric monomer (a), an organic peroxide (b) and a powdered water-soluble reducing compound (c) with the powdered water-soluble reducing compound (c) dispersed in the liquid radical polymeric monomer (a) is provided. According to the nonaqueous curable composition of this invention, time necessary for adhesion can be secured, and high adhesive strength against a wetting material, and more particularly, a biological hard tissue such as a dentine can be attained, and thus, the present invention is extremely industrially valuable.