摘要:
The invention concerns the use of redispersion powder for priming mineral and non-mineral substrates before coating, in particular filling. The redispersion powder based on acrylate and vinyl ester copolymers, in particular vinyl acetate and ethylene, can be used together with the conventional components either as a pourable dry mixture or as a paste (with up to 35 % water). Rather than impairing the adhesion of the filler compound, the high redispersion powder content tends to improve it.
摘要:
Disclosed are hydrophobic finish compositions and cementitious articles made with the hydrophobic finish compositions. In some embodiments, the article is a waterproof gypsum panel surface reinforced with inorganic mineral fibers that face a flexible and hydrophobic cementitious finish possessing beneficial waterproofing properties. The waterproof gypsum panels of the invention have many uses, such as, tilebacker board in wet or dry areas of buildings, exterior weather barrier panel for use as exterior sheathing, and roof cover board having water durability and low surface absorption. The flexible and hydrophobic cementitious finish can include fly ash, film-forming polymer, silane compound (e.g., alkyl alkoxysilane), an extended flow time retention agent including either one or more carboxylic acids, salts of carboxylic acids, or mixtures thereof, and other optional additives.
摘要:
Impregnation method for mechanically reinforcing a ceramic core used in the manufacture of turbomachinery components by the lost wax casting method, involving dipping the core into a mixture obtained by dissolving polyvinyl alcohol in water, followed by an immersing of the core in pure water and hot polymerization, characterized in that the dosage is between 100 and 200 g of PVAl per litre of water. The dipping impregnation time is preferably between 20 min and 1h 30.
摘要:
The invention relates to ceramic tiles or glass tiles that are coated on the back with a polymer film, wherein the coating is obtained by applying a homopolymer or copolymer in the form of its aqueous polymer dispersion or aqueous solution or aqueous redispersion of a polymer powder redispersed in water followed by drying, as well as their production and use for lining surfaces.