CZ38460U1 - An insulating anti-fungal plaster - Google Patents

Description

Technical area

The technical solution concerns an insulating screed with thermal insulation and anti-mold properties.

State of the art

Currently, to reduce heat transfer through the building structure (floor, ceiling, perimeter wall), a solution using thick-layer additional insulation is used, such as mineral wool, polystyrene, polyurethane foam, etc., the thickness of which reaches several tens to hundreds of millimeters, or more complex building elements that contain insulating materials, such as polystyrene or polyurethane or mineral wool. Both solutions are suitable especially for new buildings, where their use is neither an economic nor a technical problem.

Older buildings, buildings with occasional use of a cottage, cottage and especially historical buildings with a valuable interior or facade require a completely different approach. In these cases, the costs of installing thick insulation, or its further protection, are often very high, and it is often a technically demanding method of installing insulation. In many cases, this method of insulation is even excluded, because the object in question has a historically, architecturally or otherwise valuable interior or facade that cannot be modified with additional cladding, cladding or thermal insulation plaster, thereby covering or otherwise devaluing the exterior or interior decoration. In ordinary older buildings or buildings for occasional use, the application of additional thick insulation is possible. However, it is usually economically expensive, also with regard to the service life of the building.

In recent years, there has been an effort to replace, at least in some cases, the thick insulation used so far with interior cladding or panels that would bring a similar effect. Another view of heat transfer to the perimeter walls of buildings is also being taken into account. Much greater influence is placed on heat transfer by radiation from internal sources of heat radiation. In the past, sandwich materials have been successfully tested - a thin layer of insulating foam with thermoreflective foil, intended mainly for placement behind heating elements or sandwich panels made of PU foam. The thickness of these materials is approximately 5 to 50 mm. These materials significantly reduce heat transfer through building structures, reduce heat loss and improve thermal comfort in the room. However, the large-scale use of similar sandwiches in interiors is not realistic, mainly for aesthetic reasons.

Mixtures were also created that were similar in application and appearance to conventional plasters or stuccos and contained reflective materials such as crushed glass, or mica, etc., a binder and a thermal insulator such as expanded perlite or microgranulated polystyrene. This mixture was supposed to replace sandwich applications due to their unaesthetic nature, but it was not possible to prepare a mixture that would allow this with its thermal insulation and thermoreflective properties in a small thickness.

The essence of the technical solution

The above disadvantages are eliminated by the insulating screed according to the technical solution. The insulating screed according to the technical solution creates a thin surface layer that increases the perceived temperature of the surface, eliminates the unpleasant cold of the masonry, and prevents the formation of thermal bridges. It increases the surface temperature, reduces the dew point value, thereby preventing water condensation and mold formation. It ensures thermal comfort and increases heating efficiency.

It is applied by applying a thin layer using a steel notched trowel with a tooth depth of 0.5 cm. After drying for about ‘Λ hours, the resulting gaps are leveled with a steel trowel. A layer thickness of 2 to 3 mm can be sanded with a sander after drying to achieve a completely smooth, even surface.

- 1 CZ 38460 U1

According to the technical solution, the insulating screed consists of the following components:

- Styrene acrylate dispersion with pH 9, which corresponds to the composition of the product with the trade name Makrovil M 343. It is the pH value that has the fundamental influence on preventing the formation of mold. This effect cannot be achieved by using other dispersions.

- Filler, which is a mixture of limestone, kaolin and TiO2

- Glass micelles, which are hollow microspheres made of soda-lime borosilicate glass with a density of 0.15 g/cm ³ , hereinafter referred to in the application as glass micelles k15. Thanks to the air content in the micelles, the products become a perfect insulator with a thermal effect. The temperature of the masonry is noticeably warmer after application, which prevents the formation of a dew point, which is necessary together with moisture for the formation of mold. On a wall or substrate insulated in this way, moisture evaporates more quickly and the formation of mold is also prevented.

- The first wetting agent, which is a low molecular weight sodium polyacrylate solution, for example the product with the trade name Indunal NKS.

- A second wetting agent for improving adhesion between organic polymers and inorganic materials, which is ideally aminoethylaminopropyltrimethoxysilane, and its composition corresponds to the product with the commercial name Xiameter OFS 6020 - Silane.

According to the technical solution, the listed substances are present in the insulating screed in the following weight ratio:

styrene acrylate dispersion with pH 9 60 to 63% filler, which is a mixture of limestone, kaolin and TiO2, 18 to 20% glass micelles K15 14 to 16% first wetting agent, which is a low molecular weight solution of sodium polyacrylate, 2 to 3% second wetting agent, which is aminoethylaminopropyltrimethoxysilane, 1 to 2%

Examples of implementing a technical solution

Example 1

According to the technical solution, the insulating screed consists of the following components:

% wt. styrene acrylate dispersion with pH 9 % wt. filler, i.e. a mixture of limestone, kaolin and TiO2 % wt. glass micelles K15 % wt. first wetting agent, i.e. low molecular weight sodium polyacrylate solution % wt. second wetting agent, i.e. aminoethylaminopropyltrimethoxysilane

Example 2

According to the technical solution, the insulating screed consists of the following components:

% wt. styrene acrylate dispersion with pH 9 % wt. filler, i.e. a mixture of limestone, kaolin and TiO2 % wt. glass micelles K15 % wt. first wetting agent, i.e. low molecular weight sodium polyacrylate solution % wt. second wetting agent, i.e. aminoethylaminopropyltrimethoxysilane

- 2 CZ 38460 U1

Example 3

According to the technical solution, the insulating screed consists of the following components:

63 wt. % styrene acrylate dispersion with pH 9 wt. % filler, i.e. a mixture of limestone, kaolin and TiO2 wt. % glass micelles K15 wt. % first wetting agent, i.e. low molecular weight sodium polyacrylate solution wt. % second wetting agent, i.e. aminoethylaminopropyltrimethoxysilane

Industrial applicability

The insulating screed according to the technical solution can be repeatedly used in the construction industry, primarily to achieve an insulation and anti-condensation effect where it is not possible or appropriate to use other means.

Claims (1)

PROTECTION CLAIMS 1. An insulating screed, characterized in that it consists of the following components: styrene acrylate dispersion with pH 9 in an amount of 60 to 63 wt.%; 5 filler, which is a mixture of limestone, kaolin and TiO2, in an amount of 18 to 20 wt.%; glass micelles K15 in an amount of 14 to 16 wt.%; a first wetting agent, which is a low molecular weight sodium polyacrylate solution, in an amount of 2 to 3% by weight; and a second wetting agent, which is aminoethylaminopropyltrimethoxysilane, in an amount of 1 to 2% by weight.