Abstract: A dental adhesive composition which can quickly be hardened even in the presence of oxygen without using a radical generating agent such as a peroxide or a photopolymerization initiator, to give high bond strength, the composition including, in specific amounts, (A) a carboxylic acid compound having a (meth)acryloyl group and a carboxyl group, both of which are attached to an aromatic ring; (B) a bisphenol A derivative having two (meth)acryloyl groups; (C) a hydroxylalkyl (meth)acrylate; (D) a (meth)acrylate derivative having an acid group; and (E) at least one polymerization initiator selected from the group consisting of aromatic amines, aliphatic amines, and aromatic sulfinic acids; the composition being substantially free from any radical polymerization initiator.

Abstract: An aqueous bath for treating the surfaces of light metals and light metal alloys that does not contain hexavalent chromium or produce any other highly polluting effluent and that forms a highly corrosion-resistant and highly paint-adherent conversion coating has a pH from 1.0 to 7.0 and contains from 0.01 to 50 g/L of permanganic acid and/or salt(s) thereof and 0.01 to 20 g/L of at least one water soluble compound of titanium or zirconium.

Abstract: A composition and process for treating metal surfaces that contain at a weight ratio from 1:5,000 to 5,000:1 of at least one metal acetylacetonate selected from the group consisting of Al(C5H7O2)3, V(C5H7O2)3, VO(C5H7O2)2, Zn(C5H7O2)2, and Zr(C5H7O2)4, and at least one compound selected from water-soluble inorganic titanium compounds and water-soluble inorganic zirconium compounds, provides a non-chromate-type composition for imparting an excellent corrosion resistance and paint adherence to the surface of metals, particularly aluminum and its alloys, magnesium and its alloys and zinc and its alloys.

Abstract: A chromium-free water-based surface treatment liquid which contains from 0.01 to 50 g/l of a total of dissolved manganic acid, permanganic acid, and salt(s) thereof and from 0.01 to 20 g/l of a total of dissolved titanium compounds and has a pH of from 1.0 to 6.0 reacts rapidly with aluminum and aluminum alloy surfaces to deposit thereon a protective coating that does not contain hexavalent chromium and has excellent corrosion resistance and paint film holding properties.