Abstract: The open time of a cementitious composition, such as a grout, may be increased by the incorporating therein, as a binder, a polymer composition comprising a film-forming copolymer formed by polymerization of a monomer mixture comprising 1 to 3% of at least one monomer selected from the group of monomers consisting of amides of &agr;,&bgr;-unsaturated C3 to C6 carboxylic acids and at least one hydroxy-(C1 to C8)alkyl (meth)acrylate monomer, wherein the total amount of these monomers is from 2 to 7.5% by weight of said monomer mixture.

Abstract: The invention is related to a glass-ceramic article decorated with a ceramic baking finish. A SiO.sub.2 layer, about 20-200 nm thick, is placed between the decoration and the glass-ceramic material. The SiO.sub.2 layer can additionally contain, to match the refractive index to the refractive index of the glass-ceramic, up to 66.5 wt. % of oxides which change the refractive index, in particular TiO.sub.2, ZrO.sub.2, SnO.sub.2, MgO or Al.sub.2 O.sub.3. In the process to produce the decorated glass ceramic article, the SiO.sub.2 layer is preferably produced according to the known sol-gel process. Preferably, an SiO.sub.2 gel layer, optionally precondensed by a brief thermal treatment, is produced on the still-vitreous article. The decoration is applied to this gel layer and afterward the vitreous article is subjected to ceramization. The SiO.sub.2 -gel layer is converted into an SiO.sub.2 layer, and the ceramic color of the decoration is baked-in. The SiO.sub.

Abstract: The invention is related to a glass-ceramic article decorated with a ceramic baking finish. A SiO.sub.2 layer, about 20-200 nm thick, is placed between the decoration and the glass-ceramic material. The SiO.sub.2 layer can additionally contain, to match the refractive index to the refractive index of the glass-ceramic, up to 66.5 wt % of oxides which change the refractive index, in particular TiO.sub.2, ZrO.sub.2, SnO.sub.2, MgO or Al.sub.2 O.sub.3. In the process to produce the decorated glass ceramic article, the SiO.sub.2 layer is preferably produced according to the known sol-gel process. Preferably, an SiO.sub.2 gel layer, optionally precondensed by a brief thermal treatment, is produced on the still-vitreous article. The decoration is applied to this gel layer and afterward the vitreous article is subjected to ceramization. The SiO.sub.2 -gel layer is converted into an SiO.sub.2 layer, and the ceramic color of the decoration is baked-in. The SiO.sub.

Abstract: A pressure vessel sight glass, especially a tempered glass, is protected against the corrosive attack of normally alkaline, boiler feed water heated up to 300.degree. C., by providing the sight glass with a metallic oxide coating consisting essentially of SnO.sub.2, optionally combined with Cr.sub.2 O.sub.3. The coating is preferably applied as a sprayed solution of soluble salt convertible to the oxide.

Abstract: A dipping process for the production of cadmium stannate layers on a substrate, preferably glass, which comprises:(a) dipping said substrate into an alcoholic solution of a reaction product containing cadmium and tin, said solution consisting essentially of compounds having hydrolyzable and pyrolyzable residues;(b) withdrawing the substrate from said solution in a humid atmosphere; and(c) gradually heating the coated substrate to 650.degree. C., whereby hydrolysis and pyrolysis removes said residues from the coated substrate to form a coated substrate in which the molar ratio Cd:Sn corresponds to that of said alcoholic dipping solution.