HU210483B - Method for producing of wallpaint - Google Patents

Abstract

The process according to the present invention is characterized in that an antifoaming agent containing from 0.1 to 2.0 tr of wetting agent, preferably sodium tripolyphosphate and / or non-ionic surfactant, and from 0.03 to 0.2 tr, preferably paraffin hydrocarbons, is added to 2040 tr water. and mixing 0.1-0.3 tr of preservative and 0.1-0.2 tr thickening agent, followed by constant stirring with 3-15 tr polymer based binder, 15-30 tr 0.1-0.45. pm particle size activated zeolite, 5-20 tr Method for producing wall paint, preferably 0.25 µm rutile-type titanium dioxide, 1-5 tr ethylene glycol, and calcium carbonate 8-18 µm, then added. additional 7-25 tr polymer-based binder and 0.5-5.0 tr film-forming excipient and 0.07-0.4 tr, preferably paraffin hydrocarbons, are added to the mixture, and the resulting mixture is further added to 20-40. stir for a minute . EN 210 483 A Scope of the description: 4 pages

Description

The present invention relates to a process for the preparation of wall paints, preferably Rn-222 isotope binding agents.

Nowadays, it is a well-established fact that radioactive radon isotope penetrating the walls of homes causes damage to health.

There is no satisfactory solution to this problem.

It was an object of the present invention to provide a solution to the above problem, which can be applied to ordinary ordinary people to ensure that the radioactive radon isotope is not released into the room air.

The invention has led to the discovery that, when mixed with a zeolite activated in a specific composition, a wall paint can be obtained which is able to adsorb most of the radioactive radon while converting to a stable modification.

It was further recognized that the amount of Rn-222 degradation product is so low that the wall paint coating retains its retention properties over a long period of time.

Considering that Rn222 has been shown to cause most health damage by inhalation and thus into the air, the above solution ensures that this is avoided.

Accordingly, the present invention relates to a process for the preparation of wall paints, preferably Rn-222 isotope-binding wall paints, characterized in that from 0.1 to 2.0 tr of a wetting agent, preferably sodium tripolyphosphate and / or an ionic surfactant and 0.03-0.2 tr of antifoam, preferably containing paraffinic hydrocarbons, and 0.1-0.3 tr of a preservative and 0, 2, 2 tr of a thickener are added and the mixture is stirred for 3 minutes. -15 tr polymer-based binder, 15-30 tr activated zeolite with a particle size of 0.1-45 µm,

5 to 20 tr of preferably 0.25 gm of rutile titanium dioxide, 1 to 5 tr of ethylene glycol, and 8 to 18 tr of 315 µm of calcium carbonate are added followed by 7-25 tr of polymer based binder. 07-0.4 tr of antifoam, preferably containing paraffinic hydrocarbons, and 0.55.0 tr of film-forming aid are added and the resulting mixture is stirred for a further 20-40 minutes.

As used herein, "tr" refers to parts by weight. In the present invention, it is preferred that the polymeric binder is an aqueous dispersion based on 50% by weight of a polyvinyl acetate versatate copolymer or a styrene acrylate copolymer.

The present invention will be further illustrated by the following example:

Example: Wall paint composition: Water 20hrs Wetting agent: Sodium tripolyphosphate 0.1 tr nonionic surfactant 0.2 tr Additol XW 330 0.1 tr

Antifoam / BYK033 / 0.1 tr Preservative / Proxel TN / 0.1 tr ethylene glycol 1.0 tr Thickener / Natrosol H4 Br./ 0.1 tr Titanium dioxide / TIOXIDE RXL0,25ium / 5,0tr Calcium carbonate / 5um / 4,0tr Calcium carbonate / 10 lrm / 4.0 tr Activated zeolite / 0-45 µm / 15.0 tr Styrene-acrylate / Ups. 50% / dispersion 10.0 tr Film Making Toolkit / Texanol / 0.5 tr The paint composition above is adsorption ability of the

measured as follows:

The paint was applied to a film at a thickness of 280 µm, which was placed in a closed space so that it was divided into two parts. Subsequently, Rn-222 is added to one space using a solution containing Ra-226. The membrane used was cellulose nitrate.

At the end of the one week exposure time, a sample was taken from the other compartment and swallowed in Clinisol scintillation fluid. The alpha radiation of the absorbing fluid was then measured. This process was repeated with a sample taken from the radon source airspace.

Comparing the measurement results of the two airspace samples it was possible to determine the radon binding capacity of the paint layer, which proved to be 90% in our case.

The relative measurement method used also eliminated errors due to the measurement conditions and the formation of the daughter elements.

Advantages of the present invention are:

- it prevents the release of Rn-222 into the air

- easy to apply anywhere

- binding capacity is maintained for a long time

- allows high efficiency of binding

- bound Rn-222 isotope is converted to stable / non-radioactive / isotope over time.

Claims (2)

A process for the preparation of a wall paint, preferably Rn-222 isotope-binding wall paint, which comprises water and a polymer-based binder, characterized in that 0.1 to 2.0 tr of a wetting agent, preferably sodium tripolyphosphate and 20 to 40 tr of water are used. / or a non-ionic surfactant and 0.03-0.2 tr of antifoam, preferably containing paraffinic hydrocarbons, as well as a 0.1-1.3 tr of preservative and 0.1-0.2 tr of a thickener, and then 3-15 tr of polymer-based binder, 15-30 tr of activated zeolite having a grain size of 0.1 to 0.45 µm and titanium dioxide of 5 to 20 tr, preferably 0.25 µm, with constant mixing 1-5 tr of ethylene glycol and 8-18 tr of 3 to 15 micrometer of calcium carbonate are then added to the An additional 7-25 tr of polymer-based binder and 0.5 to 5.0 tr of film-forming aid and 0.07 to 0.4 tr of antifoam, preferably containing paraffinic hydrocarbons, are added to the mixture, and the resulting mixture is further blended. Stir for 20-40 minutes. 5 2. A process according to claim 1, wherein the polymer based binder is a dispersion containing 50% by weight of a polyvinyl acetate versatile or a styrene acrylate copolymer.