UNIVERZITA J. E. PURKYNE V USTI NAD LABEM (Czech Republic)
USTAV ANORGANICKE CHEMIE AV CR, V.V.I. (Czech Republic)
Inventor
Michna, Stefan
Novotny, Jan
Jaskevic, Martin
Cerny, Zbynek
Rosypal, Pavlina
Plocek, Jiri
Abstract
The solution is a geopolymeric suspension for insoluble heat and corrosion-resistant coatings on the surfaces of Fe alloy products, which contains 20 to 25% by weight aqueous solution of 80 to 90 percent phosphoric acid, 25 to 30 % by weight aluminosilicate, 4.6 to 5.2 % by weight graphite, 5 to 7 % by weight nanoparticles of aluminium oxide with size to 90 nm and the remainder is isopropyl alcohol. It also refers to preparing this geopolymeric suspension, in which an aqueous solution of 80 to 90 percent phosphoric acid is added to 100 mi of isopropyl alcohol, then aluminosilicate is gradually added and stirred at laboratory' temperature for 8 to 15 min., and after 9 to 15 min. while stirring, graphite and nanoparticles of aluminium oxide are added once as additives and the resulting mixture is homogenized for another 18 to 25 min.
C23C 20/08 - Coating with inorganic material, other than metallic material with compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
C09D 1/04 - Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
UNIVERZITA J. E. PURKYNE V USTI NAD LABEM (Czech Republic)
USTAV ANORGANICKE CHEMIE AV CR, V.V.I. (Czech Republic)
Inventor
Michna, Stefan
Novotny, Jan
Jaskevic, Martin
Cerny, Zbynek
Rozsypal, Pavlina
Plocek, Jiri
Abstract
The invention relates to the geopolymer suspension for insoluble heat- and corrosion-resistant coatings for the surfaces of Fe alloy products that contains 20 to 25% wt. of the aqueous solution of 80% to 90% wt. phosphoric acid, 25 to 30% wt. of aluminosilicate, 4.6 to 5.2% wt. of graphite, and the remainder is isopropyl alcohol. It further relates to the method of preparing the geopolymer suspension, wherein 20 to 25% wt. of the aqueous solution of 80 to 90% phosphoric acid is added to 100 ml of isopropyl alcohol and 25 to 30 g of kaolin is gradually added while stirring at laboratory temperature for 8 to 15 minutes. After 9 to 15 minutes, 4.6 to 5.2 g of graphite as an additive is added at once, and the resulting mixture is homogenised for another 18 to 25 minutes.
C23C 20/08 - Coating with inorganic material, other than metallic material with compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
C09D 1/04 - Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
AN AGENT FOR SURFACE FINISHING OF OBJECTS AND STRUSTURES BY A COATING LAYER WITH A PHOTOCATALYTIC AND SELF-CLEANING EFFECT AND RESPECTIVE MANUFACTURING PROCESS
USTAV ANORGANICKE CHEMIE AV CR, V.V.I. (Czech Republic)
Inventor
Stengl, Vaclav
Ratajsky, Petr
Abstract
An agent for surface finishing of objects and structures by a coating layer with a photocatalytic and self-cleaning effect, above all with the catalytic effects of air pollutants´ photodegradation. It is created by a precursor based on a dispersion of at least one compound from the group of metals´ oxids and salts in nanocristalline form, which is photoactive even in the visible band of the solar radiation spektrum. The precursor said being a hydrolysis product of respective metal´s soluble salt in the medium of silicates, silicic esters, siloxanes or silicon alcoxides.
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