CS210207B1 - Painter substance for decoration purposes - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative material based on clays, kaolins, limestone, adhesive, antifungal and liquefying agents, in which the basic means for enhancing the whiteness of the composition are paint kaolin, paper kaolin and limestone.

Until now, so-called painter clays or waste materials from the production of kaolin, so-called slags, which are very fine quartz sands with kaolin, are used for painting decorative purposes. These materials are dispersed in water to a slurry prior to use. To solidify the applied layer on the wall, glue or other adhesive is added to the suspension or dry powder.

In addition to these simple compositions, compositions made up of several kinds of suitable raw materials are produced in dry powder form or in aqueous suspension. The basic raw materials are suitable types of lightweight clays, float chalk, to increase whiteness adds titanium white. A suitable type of adhesive (glue, dextrin, carboxymelyl cellulose and the like) and an antifungal agent are usually added to increase the strength of the applied layer of material. The production technology consists of grinding and washing of the individual components, forming a thick suspension. The suspension is homogenized by mixing in tanks and dispensed into containers.

The main monitored properties are whiteness, which must reach min. 70% whiteness of the standard, which is pure MgO. Other required properties are grain size (min. 98.5% of particles smaller than 0.09 mm), high hiding power and resistance to abrasion of textiles after drying.

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The disadvantage of this composition is that it is considerably unbalanced about the properties of the various types of raw materials in relation to the desired properties of the resulting mass. Since the basic clay component reaches about 60-65% whiteness, DC must use additional raw materials, such as float chalk with a whiteness of 75-78% and titanium whiteness of more than 90% whiteness to achieve the required minimum whiteness of the mass. Due to these considerable differences in properties, the finite properties of the material, particularly the whiteness and the graininess, easily vary. Thus, such materials as titanium white and float chalk are spoiled.

These drawbacks are eliminated by the inventive decorating composition which comprises 10 to 50% coating kaolin, 10 to 45% float kaolin, 15 to 45% ground limestone, up to 15% porous clay, 2 to 6% water-soluble adhesive and 0.1 up to 2.5% of an antifungal composition. It is important that the whiteness of painted kaolin is more than 78%, the whiteness of floated kaolin and limestone is more than 75% and the whiteness of clay is more than 63%. The raw materials are co-milled with water so that the resulting mixture contains less than 1% particles above 0.09 mm. Some components such as glue, event. some other pre-ground or flooded raw materials are mixed together in a mixer or burner with water, the two suspensions are then combined and homogenized by stirring. The ratio of water to dry matter can be chosen so that the suspension is sufficiently dense and does not settle in the packages. It is further diluted with water before use. As the adhesive, carboxymethyloeluloza, methylcellulose, polyvinyl alcohol and other water-soluble substances which are not colored and do not affect the whiteness of the mass can be used. For example, formalin is used as an antifungal agent. To achieve a high solids concentration in the mass, the flowability is adjusted by the addition of liquefying substances (soda, water glass, sodium pyrophosphate, etc.) in an amount of 0.1 - 0.5% ·

Example composition;

soda calclnated 0.1 wt sodium water glass 0,3% ” Kaolin Coating 25, -% micronized limestone 40, -% paper kaolin 23,35% Porous clay 8.6% carboxymetyloeluloza 2.6% formalin 0.05%

Part of the raw materials, i.e. carboxymethyloeluloza β by floated kaolin, was washed in a mixer in water, the other part was ground in a drum mill with water. The two aliquots were combined and homogenized by stirring in a tank. A whiteness of 78.5%, a dry matter content in the slurry of more than 50%, a high hiding power of the coating at minimum abrasion was achieved. Ingredients below 0.09 mm were more than 99

Claims (4)

1 «Paint for decorative purposes based on clays, kaolins, limestone, glue, antifungal agent and blasting agents, characterized in that the basic constituents for increasing the whiteness of the limestone are painted kaolin in an amount of 1Θ to 50% by weight; 10 to 55 wt. and ground limestone in an amount of 15 to 45 wt. 2. Painting material for decorative purposes according to claim 1, characterized in that the paint kaol is not floated kaolin with a whiteness of min. 78%, containing min. 50% of the particles below 2 micrometers. 3. Painting material for decorative purposes according to item 1. characterized by. that kaolin floated paper mill is kaolin of whiteness min. 75%. Painting material for decorative purposes according to claim 1, characterized in that the whiteness of the limestone is min. 75%, containing min. 90% of the particles below 0.5 mm.