Abstract: A crude drug ingredient having bactericidal activity incorporated into a curable composition comprising a (meth)acrylate type monomer, a polymerization initiator and if necessary a filler to formulate the ingredient into the drug having sustained release property. The curable composition containing the crude drug ingredient is applied to a defective part of a tooth or an artificial gum for preventing dental diseases such as carious tooth, pyorrhea alveolaris, and the like.

Abstract: A crude drug ingredient having bactericidal activity incorporated into a curable composition comprising a (meth)acrylate type monomer, a polymerization initiator and if necessary a filler to formulate the ingredient into the drug having sustained release property. The curable composition containing the crude drug ingredient is applied to a defective part of a tooth or an artificial gum for preventing dental diseases such as carious tooth, pyorrhea alveolaris, and the like.

Abstract: A crude drug ingredient having bactericidal activity incorporated into a curable composition comprising a (meth)acrylate type monomer, a polymerization initiator and if necessary a filler to formulate the ingredient into the drug having sustained release property. The curable composition containing the crude drug ingredient is applied to a defective part of a tooth or an artificial gum for preventing dental diseases such as carious tooth, pyorrhea alveolaris, and the like.

Abstract: Olefins are polymerized with superior activity, using a catalyst composition consisting essentially of (a) a transition metal catalyst component prepared by reacting a titanium or vanadium compound with the reaction product formed between an alcohol-adduct of a magnesium dihalide solid carrier and an organometallic compound or a metal of groups I to III of the periodic table, and (b) an organometallic compound catalyst component of a metal of Groups I to III of the periodic table.

Abstract: A process for preparing a polyolefin graft copolymer, which comprises subjecting a copolymer selected from the group consisting of copolymers of ethylene with diolefins and copolymers of C.sub.3 to C.sub.8 .alpha.-olefins with diolefins and containing 2 to 40 double bonds per 1000 monomeric units therein and a monomer radical graft-copolymerizable onto said copolymer to a suspension graft copolymerization in the presence of a radical initiator in an inert organic solvent capable of dissolving said radical-polymerizable monomer but incapable of dissolving said graft copolymer and of reacting therewith, at a temperature at which said copolymer is not melted.