CS196128B1 - Coloured painting composition for artifical stone and plaster - Google Patents

Description

SOCIALISTIC AND DESCRIPTION OF THE INVENTION 4 TO THE COPYRIGHT 196128 (II) (Bl)

/ 22 / Registered 03 02 78 /, 21 / ./PV 738-78 / (51) Int. C1.SC 04 B 41 / 22C 04 B 41/32 (10) Published 29 06 79

OFFICE OFFICE

AND DISCOVERIES (45) Published 15 06 82 (75).

Author of the invention RATHOUSKÝ JIŘÍ dr. DrSc. , KRUCHŇA OLDŘICH Ing., PELIKÁN JIŘÍ dr

PRAHA and SOKOL VÁCLAV ing., KLADNO (54) Color coating system for natural stone and plaster

BACKGROUND OF THE INVENTION The present invention relates to a colored coating system for natural stone and plasters with a binder base of organosilicon compounds.

The existing types of coating systems are primarily based on calcium binders, their lifespan is limited by the aggressive environment of larger and industrial cities due to gaseous and solid emissions. A special case is the polychromy of stone materials. When using lime paints, due to the completely different character of the sandstone and paint, it is washed away in a few months. Another type of paint system is latex paint, which has been found to be completely unsuitable for long-term use. Substantially more effective are paint dispersion or solvent based systems based on acrylate binders and their copolymers. A disadvantage of these materials is the necessity of a homogeneous substrate with approximately the same suction capability, which is difficult to achieve, especially for reconstructed older buildings. The disadvantage is the increase in the diffusion resistance of the plaster and thus the reduction of vapor and gas permeability, which is a worse construction. objects of particular importance. However, these materials, despite their otherwise good technical parameters, are not suitable for all kinds of substrates, both in terms of heritage and aesthetic, and because they form a surface of the film which is permeable, but may exfoliate in the wall when exposed to moisture. film form.

SUMMARY OF THE INVENTION The subject of the invention is a color coating system for natural stone and plaster, consisting of a primer and topcoat, which contains inert inorganic 2 pigments, an organosilicon binder and an inert filler, wherein the binder of the topcoat and optionally the primer composition is 50-90 wt. Of hydrolysed organosilicon esters of the formula R 5 (OR 1) with 50 to 10 wt. % of a compound of general formula Si / OR / 4, wherein R is the same non-boron alkyl, containing 1 to 5 carbon atoms, respectively. their oligomers having hydrophobic properties at a concentration of 10 to 90 wt. %. The color coating system may contain 0.05 to 10 wt. % of an alkaline or neutral catalyst. Accordingly, the present invention provides a binder-based coating system which is an ester-type organosilicon substance. The hydrolysis of the alkoxy groups results in a solution of silicic acid and methyl silicic acid which, on drying, becomes a gel with good bonding properties, with high resistance to chemicals, weathering and exhalation. vapor- and gas-permeable, does not increase the diffusion resistance of the material on which it is deposited by more than 10 to 20%, and in addition imparts water-repellency to the impregnated material. The coating system, in addition to the organosilicon binder, contains a color pigment-inorganic character, sufficiently chemically resistant and inert in nature. Further, they contain various additives which modify the aesthetic appearance of the surface of the paint, for example milky quartz.

The organosilicon binder-based color coating system is applied to the primer-coated substrate to allow better bonding between the inorganic-196128

Claims (2)

196128 by material such as lime plaster, natural stone and paint. Furthermore, due to its hydrophobicity, it prevents the ingress of liquid water to the surface of the inorganic material and thus the migration of salts and prevents the possibility of efflorescence. However, the primer does not remove sufficient vapor and gas permeability of the impregnated material. The primer may be applied to any of the commonly used compositions, e.g. however, it is preferred to use a mixture of hydrolyzed organosilicon esters with a hydrophobic property having a concentration of 10 to 90% by weight, for example, with the aid of silicone esters of acrylic acid or methacrylic acid, siloxane polymers. In addition, due to the same chemical composition, a very homogeneous layer is obtained, which is also beneficial in the physico-chemical and mechanical properties of the paint. The color coating system of the present invention has good adhesion to both porous and non-porous backing materials such as plaster, natural stones, ceramics, glass, concrete, bricks, asbestos cement, etc. The composition can be applied by coating, rolling and spraying . The color coating is OBJECT What is claimed is: 1. A color coat system for natural enamels and plasters, comprising a primer and a topcoat comprising inert inorganic pigments, an organosilicon binder and an inert filler, characterized in that the topcoat binder and optionally the primer are from 50 to 90 wt. % of hydrolyzed organosilicon esters of the general formula RSi / OR / 3 with 50 to 10 wt. Z long-term efficiency in industrial and urban air conditions. Further, an example of a color coating system according to the invention is provided. Example On the building of sandstone blocks, the lining of windows and doors was necessarily red-painted in terms of historical memory. The areas to be stained were initially primed with a hydrolyzed organosilicon ester having hydrophobic properties of 60% of the organosilicon component, of which 30% formed tetraethoxysilane and 70% methyltriethoxysilane. The 24 hour pause was coated with a red paint system consisting of a red pigment on the base of iron oxide, silica sand, siloxide, and the like. Alkaline Catalyst. The bonded above mentioned bulk materials have been hydrolyzed organosilicon esters with hydrophobic properties of 60% by weight of the organosilicon component. The paint has been brushed by rubbing into the pores of the sandstone with circular movements. The resulting aesthetically pleasing red surface had no defects after being exposed to weather. DISCLOSURE OF THE INVENTION The compounds of formula (Si) / (OR) 4, wherein R is an alkyl group having from 1 to 5 carbon atoms or different alkyl groups. their oligomers with hydrophobic properties at a concentration of 10 to 90 wt. FROM. 2. A paint system according to claim 1, characterized in that it comprises 0.05 to 10 wt. From an alkaline or neutral catalyst. SpvfrojTífii. n. p. instructions 7. Moet