Filler compound

Abstract

A filler compound comprising calcium carbonate is proposed, wherein the filler compound does not contain any acrylate.

Description

[0001] Thorsten Backe UG (limited liability) 23.02.2026

[0002] 1

[0003] filler

[0004] The present invention relates to a filler compound according to claim 1.

[0005] State of the art

[0006] Fillers are important materials for leveling surfaces, filling cracks or holes, and preparing walls for further applications such as painting or wallpapering. Fillers typically consist of a mixture of various powders and binders that, when applied to a surface, form a smooth and even layer.

[0007] Description of the invention: Problem, solution, advantages

[0008] The aim of the present invention is to provide an improved jointing material that is mold-resistant and yet ensures the necessary elastic bonding in window integrations and other connection joints.

[0009] The invention relates to a filler compound comprising calcium carbonate as an active ingredient and being completely free of acrylates. Traditional fillers in the prior art contain acrylates, which, as polymers, can increase the binding strength and flexibility of the compound. The present invention aims to replace acrylates for various reasons, such as environmental compatibility or improved performance. Thus, the present invention provides a composition that represents an environmentally friendly alternative to conventional fillers containing acrylates.

[0010] Calcium carbonate provides stability, a high degree of whiteness, and advantageous processing properties. Within the scope of the invention, the formulation of the filler is based on calcium carbonate without acrylates, in order to support both ecological and health benefits.

[0011] The absence of acrylates in the filler can potentially reduce harmful emissions and make the product more suitable for indoor use.

[0012] RGTH T241037W012100PTThorsten Backe UG (limited liability) 23.02.2026

[0013] 2

[0014] This is particularly useful in less ventilated areas. Furthermore, due to its mineral base, the trowelable compound offers good adhesion to various substrates, easy and even application, and pleasant sanding properties after drying.

[0015] In addition to calcium carbonate, other components can be incorporated to improve specific properties of the filler, such as drying time, viscosity, or color. The composition can be tailored to suit various applications, from medium- to large-area wall repairs and crack filling to leveling uneven surfaces. The filler can be flexibly adapted to specific construction requirements without relying on synthetic binders like acrylates, making it a promising and sustainable option in the building industry.

[0016] The filler is formulated with a calcium carbonate content ranging from 20 to 70 percent by weight. This concentration of calcium carbonate is chosen to favorably influence the mechanical and optical properties of the filler. This composition results in a stable and efficient compound that facilitates application and produces an aesthetically pleasing finish. Furthermore, the filler is easy and straightforward to fill into cartridges, making it particularly suitable and efficient for use as a joint sealant.

[0017] Calcium carbonate, the main component of the filler, serves as the primary filler, contributing to improved structural integrity and whiteness. Within the defined weight percentage, calcium carbonate ensures the filler has the appropriate density to create smooth surfaces and effectively level out irregularities. The selected range of calcium carbonate also allows for variations to meet the specific requirements of each application. A higher concentration may be preferred for applications where increased filling power and stability are desired, while lower concentrations offer easier workability for finer or more detailed work. Additionally, the specified

[0018] RGTH T241037W012100PTThorsten Backe UG (limited liability) 23.02.2026

[0019] 3

[0020] The weight ratio achieves a balanced ratio between binding capacity and surface texture, allowing the filler to be easily applied and customized. This filler represents a promising solution that considers environmental aspects while highlighting the advantages of calcium carbonate for various construction applications.

[0021] The filler is formulated without organic pesticides. This formulation choice reflects an awareness of health and environmental responsibility by reducing potential sources of pollutants. The absence of organic pesticides allows for safe use in construction and renovation work, especially indoors or in sensitive environments where air quality is important.

[0022] The absence of organic pesticides can reduce the risk of allergic reactions or health problems in users and residents and enables sustainable building practices by minimizing the release of chemical residues that could have environmental impacts.

[0023] In addition, this composition incorporates compatibility and safety standards for applicators and end users, while maintaining the physical properties of the filler. The compound retains its functionality in terms of adhesion, workability, and drying behavior through the targeted use of components that pose no health risks.

[0024] Without the inclusion of organic pesticides, this filler is suitable for a wide variety of environments, such as residential buildings, schools, or public facilities, where healthy living spaces are beneficial. This formulation makes it a smart choice for the application and processing of construction products.

[0025] The filler is formulated to have a pH value of at least 8, with a pH value of at least 9.5 and, in the best case, at least 11 achievable. Such a pH value could help to...

[0026] RGTH T241037W012100PTThorsten Backe UG (limited liability) 23.02.2026

[0027] 4

[0028] to make the surface resistant to microorganisms and to promote a longer shelf life of the mass.

[0029] A higher pH value can also be helpful in preventing mold and bacterial growth and could further improve the stability of the compound over longer periods. This alkaline property can be advantageous in interior and exterior applications by strengthening the resistance of the treated surfaces.

[0030] Furthermore, the increased pH value can influence the processing and application of the filler by improving adhesion and potentially allowing for more favorable drying times. At higher pH values, the filler remains flexible and exhibits improved sanding behavior, which can facilitate finishing.

[0031] By balancing the pH value with the other beneficial components of the filler, a high-quality solution for versatile applications could be created that meets modern building technology requirements and also promises long-term resistance to external influences.

[0032] The filler includes marble dust as a supplementary component, which improves the structural and aesthetic properties of the composition. Due to its fine grain, marble dust has proven advantageous in achieving a smooth and refined surface in the filler. The addition of marble dust can also increase the mechanical strength of the mixture and improve workability. Marble dust is a fine powder produced by grinding marble (i.e., calcium carbonate in crystalline form). It consists primarily of calcium carbonate but may also contain small amounts of other minerals.

[0033] Marble dust offers a higher density, which promotes a uniform and lasting surface quality when leveling uneven surfaces and filling cracks. Furthermore, the light-reflecting properties of marble dust contribute to an improved visual appearance, which enhances the

[0034] RGTH T241037W012100PTThorsten Backe UG (limited liability) 23.02.2026

[0035] 5

[0036] This makes the filler particularly suitable for decorative applications or demanding renovations.

[0037] The addition of marble dust also improves the abrasion resistance of the filler, making the treated surfaces more resistant to everyday wear and tear. This property makes the filler versatile enough for use in various environments, such as for treating walls and ceilings both indoors and outdoors.

[0038] A combination of calcium carbonate and marble flour could ultimately create a favorable balance between workability and performance, making the filler easier to apply while still maintaining high standards in terms of durability and strength of the treated surfaces.

[0039] The filler may contain calcium hydroxide, preferably in a quantity between 10 and 20 percent by weight. Calcium hydroxide is recognized for its alkaline properties and its ability to improve the filler's microstructure. The inclusion of calcium hydroxide can impart additional strength and stability to the filler, which could be advantageous for applications on walls and ceilings.

[0040] The alkalinity of calcium hydroxide can offer enhanced protection against microbial influence, thus better protecting the compound against mold growth and biological degradation processes. This contributes to the longevity and preservation of the quality of the treated surfaces and can help maintain a consistently durable layer, which could positively influence the indoor climate.

[0041] The calcium hydroxide content can also influence the drying behavior of the filler by promoting faster hardening and reducing the working time that might otherwise be required for rework. Furthermore, it can improve the adhesion of the filler to various substrates, which can enable its application on a wide range of surfaces.

[0042] RGTH T241037W012100PTThorsten Backe UG (limited liability) 23.02.2026

[0043] 6

[0044] In combination with other components such as marble flour or calcium carbonate, calcium hydroxide can support the synergistic effects that can lead to a high-performance filler that meets the requirements of modern construction and restoration technology while taking ecological and health aspects into account.

[0045] The filler is formulated to contain cellulose, an ingredient that improves its physical properties. Cellulose, known for its naturally occurring fibers, increases the filler's robustness and workability and can enhance the consistency and stability of the formula. It allows for improved adhesion and bonding within the filler and also provides a more appealing viscosity, which can facilitate easy application to various surfaces.

[0046] Furthermore, adding cellulose can make the filler more pliable and reduce the occurrence of cracking during drying, resulting in a uniform and smooth surface. Cellulose can also help regulate moisture during the drying process, causing the filler to harden more slowly and thus contributing to a more durable coating.

[0047] Cellulose is a natural raw material that enhances the environmental compatibility of the filler and keeps it free of synthetic binders such as acrylates. This property makes the filler suitable for applications in sustainable construction projects and renovations where ecological considerations are advantageous.

[0048] In addition to other components such as calcium carbonate and marble flour, cellulose can increase the overall efficiency of the compound in terms of strength, stability and ease of use, helping to ensure that the filler meets the standards of modern construction practices and aesthetic requirements.

[0049] The filler can be enriched with borate, particularly sodium borate, to optimize its functional properties. Sodium borate can be beneficial in the formulation by acting as a pH stabilizer and inhibitor of microbial growth. The addition of borate may contribute to...

[0050] RGTH T241037W012100PTThorsten Backe UG (limited liability) 23.02.2026

[0051] 7

[0052] to extend the durability and resistance of the filler, which could protect the treated surfaces against external influences for a longer period of time.

[0053] Additionally, borate could positively influence the fire resistance of the compound, thus offering added safety in construction applications. By stabilizing the compound's structure, borate could also help minimize cracking and increase strength, which could be particularly advantageous when applied to large areas.

[0054] Sodium borate, a salt of boric acid, is known for its versatile properties, which make it a popular additive. It works effectively in the binder matrix of fillers and can promote a uniform appearance and extended working time.

[0055] The combination of borate with other components such as cellulose, calcium carbonate, and marble flour could enable the creation of a filler that is both environmentally friendly and high-performing, meeting the requirements for sustainable and durable construction and renovation projects. This composition offers an attractive opportunity to develop innovative building products that consider both practical advantages and safety aspects.

[0056] The terms borax and tinkal are alternative names for borate, indicating the substance's historical and geographical origin. These names may be relevant not only to its chemical properties but also to its role in the cultural and economic development of its regions of origin—primarily Turkey, California, and Tibet.

[0057] Borax can be helpful in various areas because, in addition to its chemical properties, it also offers advantages in storage and handling. Due to its comparatively low toxicity and good solubility, it may be easier to process and safer in contact with other materials. As a mineral substance that occurs both naturally and

[0058] RGTH T241037W012100PTThorsten Backe UG (limited liability) 23.02.2026

[0059] 8

[0060] Because borax can be produced synthetically, it offers flexible options for integration into different production processes and applications.

[0061] In the context of filler, the use of borax can contribute to the product's environmental compatibility, as it may have fewer toxic effects on the environment and is therefore considered a more environmentally friendly alternative to other chemical additives. The mineral base of borax, combined with its ability to act within the filler formulation, ensures that the final products meet current standards for sustainable construction.

[0062] The filler contains water, optionally in a quantity between 10 and 20 percent by weight. Water improves the workability and application of the filler by providing the desired consistency and viscosity. The defined water content facilitates easy application and even distribution of the filler on various surfaces.

[0063] The addition of water as a component allows the compound to maintain a balanced moisture content, which positively impacts drying time and improves adhesion to substrates. This results in a smooth and precise finish that meets the requirements of high-quality surface treatments.

[0064] Furthermore, water promotes the integration of other ingredients such as calcium carbonate, marble flour, and cellulose into a homogeneous mixture, thereby optimizing the physical properties of the compound. Water also contributes to the flexibility of the filler, facilitating its adaptation to different application situations.

[0065] In combination with other components, the water content of the filler can form the basis for sustainable construction, where environmental friendliness and performance play a role. This property makes the filler a versatile choice for modern construction and renovation projects that enable both efficiency and ecological responsibility.

[0066] RGTH T241037W012100PT

Claims

Thorsten Backe UG (limited liability) 23.02.2026 9 Claims 1. Filler compound comprising calcium carbonate, the filler does not contain acrylate.

2. Filler according to claim 1, characterized by the fact that The calcium carbonate content is between 20 and 70 percent by weight.

3. Filler according to claim 1, characterized by the fact that The filler does not contain any organic pesticides.

4. Filler according to any of the preceding claims, characterized by the fact that The filler has a pH value of at least 8, preferably at least 9.5, most preferably at least 11.

5. Filler according to any of the preceding claims, characterized by the fact that The filler contains marble dust.

6. Filler according to any of the preceding claims, characterized by the fact that The filler material comprises calcium hydroxide, preferably in an amount between 10 and 20 percent by weight.

7. Filler according to any of the preceding claims, characterized by the fact that The filler contains cellulose.

8. Filler according to any of the preceding claims, characterized by the fact that The filler contains borate, preferably sodium borate. RGTH T241037W012100PTThorsten Backe UG (limited liability) 23.02.2026 10 9. Filler according to any of the preceding claims, characterized by the fact that The filler material comprises water, preferably in an amount between 10 and 20 percent by weight. RGTH T241037W012100PT