Sealant composition for waterproofing of ornamental rocks and method of waterproofing using said sealant composition

Description

1 / 8 Sealant composition for waterproofing ornamental rocks and waterproofing method using said sealant composition. Field of application.

[0001] This descriptive report concerns a patent for invention of a sealant composition for waterproofing ornamental rocks and a waterproofing method employing said sealant composition, for application in the treatment and processing of ornamental rocks, encompassing the industry that handles slabs of natural rocks such as marble, granite, quartzite, among others, used in architectural coverings, floors and finishes, having particular relevance in protecting these stones against stains and infiltration of water and other liquids, guaranteeing the aesthetic preservation and durability of the material. SUMMARY OF THE INVENTION

[0002] The ornamental stone market is of great economic, social and environmental importance, and includes the extraction, processing and marketing of natural stones, such as granite, marble, quartzite and slate, used in construction and decoration.

[0003] Ornamental rocks possess characteristics that make them highly desirable in civil construction, architecture, and design, among which the following stand out: A wide variety of natural colors, patterns, and textures; . Acceptability of finishes such as polished, honed, flamed and brushed, and . Unique appearance, as each piece has natural variations. Petition 870250069024, dated 05 / 08 / 2025, page 6 / 13 2 / 8

[0004] Ornamental rocks have high mechanical strength, withstanding impacts and wear; abrasion resistance, making them ideal for high-traffic areas, and chemical resistance, such as quartzite, for example.

[0005] Some ornamental rocks, such as crystallized quartzites, have low water absorption, making them more resistant to stains; however, sandstones, metarenites, and some quartzites, being more porous, need waterproofing.

[0006] Water infiltration in ornamental rocks occurs due to the presence of porosity and microcracks in the material, allowing liquids to penetrate; this occurrence can be influenced by several factors, such as: More porous rocks, such as some types of quartzite and sandstone, have a greater capacity to absorb water and other liquids, facilitating infiltration; Small cracks, whether natural or caused during the extraction and cutting process, can allow moisture to penetrate the rock. Water absorption can occur through capillary action, especially in more porous rocks, allowing moisture to rise even against gravity.

[0007] The solution developed for waterproofing ornamental rocks in the present invention uses a formulation based on hydrogenated silicone oil, or silane siloxane, dispersed in a highly efficient vehicle, which acts as a carrier, ensuring the homogeneous distribution of the active ingredient in the pores of the rock, guaranteeing that the entire surface is uniformly covered, maximizing penetration and coverage without modifying the chromatic pattern of the rocks, while the Petition 870250069024, dated 05 / 08 / 2025, page 7 / 13 3 / 8 of the active ingredients are responsible for providing water repellency to the rocks, forming an effective barrier against liquids, without altering their natural color or causing unwanted stains, which allows the treated rocks to maintain their original aesthetics, remaining clear and protected. BACKGROUND OF THE TECHNIQUE

[0008] To prevent water infiltration, it is common to apply specific waterproofing agents for each type of rock, which create a protective barrier against the penetration of water and other liquids, and which work in different ways depending on the type of waterproofing agent used. The main mechanisms of action include: Water repellency (hydrophobic coatings), based on nanoparticles that adhere to the stone's structure, creating an efficient barrier against water and oil without compromising its appearance, maintaining the rock's breathability, allowing water vapor to escape without allowing liquids to enter. Ideal for porous rocks, such as marble and granite, which are susceptible to absorbing water and can stain or suffer degradation from infiltration. Disadvantages include high cost compared to other methods, the need for reapplication due to wear, and low effectiveness on very porous stones. . Formation of a protective layer (resins and sealants), based on acrylic, epoxy or polyurethane products that create a protective film on the surface of the rock, being indicated for environments subject to high humidity or direct contact with aggressive liquids (such as acids and oils), and may alter the appearance of the rock, giving it shine or a wet effect, having the disadvantage of potentially altering the aesthetics. Petition 870250069024, dated 05 / 08 / 2025, page 8 / 13 Removing 4 / 8 of the rock will leave an artificial shine, form a film that may crack or peel over time, and reduce the rock's ability to breathe, potentially causing efflorescence or internal stains; . Penetration into micropores (impregnating agents), using solvents or water, which react chemically, creating an internal barrier against moisture, preserving the natural appearance of the stone. These are ideal for surfaces that cannot undergo aesthetic alterations. Disadvantages include variable effectiveness depending on the porosity of the rock, wear over time requiring periodic reapplication, and failure to prevent the absorption of oils and acidic substances. . Impregnation with paraffins or waxes, synthetic or natural, to create a water-repellent layer. Disadvantages include low resistance to heavy traffic, potential darkening of the stone and a sticky texture, and the need for frequent maintenance. FUNDAMENTALS OF THE INVENTION

[0009] In order to overcome the drawbacks of the current state of the art, a sealant composition for waterproofing ornamental rocks and a waterproofing method employing said sealant composition are proposed, according to the present invention, wherein said sealant composition employs a formulation composed of hydrogenated silicone oil, in a concentration that can vary between 2% and 45%, responsible for conferring water-repellent properties, whose ability to penetrate deeply through the pores of the rocks creates an effective barrier against liquid infiltration, maintaining chromatic integrity and preventing Petition 870250069024, dated 05 / 08 / 2025, page 9 / 13 5 / 8 any type of unwanted stain; consequently, the treated rocks maintain their original aesthetic appearance while remaining protected and clear. Alternatively, silane siloxane can be used in the same proportion, also using isoparaffin as a dispersing vehicle, in a proportion ranging from 55% to 98%. This ensures the uniform distribution of the silane compound through the complex porous pathways of the rocks, so that this homogeneous dispersion optimizes the penetration and effective coverage of the hydrogenated silicone oil or silane siloxane, ensuring that the chromatic pattern of the rocks is not altered. This provides an effective solution for waterproofing ornamental rocks, guaranteeing the preservation of aesthetics while offering increased durability and superior protection against liquid damage.

[0010] Among the benefits of the solution proposed in the present invention, the following stand out: Enhanced water repellency, which ensures maximum resistance to water and stains, preserving the original visual appearance, as the composition allows the active ingredient to pass through the capillaries of the rocks, protecting all points and preventing the entry of liquids; . stability of the application aided by the stabilization of the asset during application, promoting effective penetration; Preservation of aesthetics, by ensuring that the color pattern of the rocks is not altered, thus preserving their aesthetic value; Petition 870250069024, dated 05 / 08 / 2025, page 10 / 13 6 / 8 . Extensive protection impregnating the entire substrate without compromising the original color and shine of the stones; . increasing the lifespan of ornamental rocks in architectural uses, while maintaining their visual appeal and structural integrity, and . suitability for environments where maintaining the rock's natural appearance is critical. PREFERRED DESCRIPTION OF THE INVENTION

[0011] The sealant composition for waterproofing ornamental rocks of the present invention employs a formulation composed of hydrogenated silicone oil, in a concentration that can vary between 2% and 45%, responsible for providing water-repellent properties, whose ability to penetrate deeply through the pores of the rocks creates an effective barrier against liquid infiltration, maintaining chromatic integrity and preventing any type of unwanted stain;Consequently, the treated rocks maintain their original aesthetic appearance while remaining protected and clear. Alternatively, silane siloxane can be used in the same proportion for waterproofing the rock surface. Isoparaffin can also be used as a dispersing vehicle, in a proportion ranging from 55% to 98%, ensuring the uniform distribution of the silane compound through the complex porous pathways of the rocks. This homogeneous dispersion optimizes the penetration and effective coverage of the hydrogenated silicone oil or silane siloxane, guaranteeing that the chromatic pattern of the rocks is not altered, ensuring an effective solution for waterproofing ornamental rocks. Petition 870250069024, dated 05 / 08 / 2025, page 11 / 13 7 / 8 preserves aesthetics while offering increased durability and superior protection against liquids due to complete substrate impregnation.

[0012] The waterproofing method employing said sealant composition of the present invention comprises the following steps: Initially, the sheets to be treated must have a rustic finish and be completely clean and dry, with a pH of the material >4 and moisture <15; The slabs are placed in an autoclave, where negative pressure (vacuum) of up to 2 bar is applied to remove air and moisture from the pores of the rocks; After which, the waterproofing agent is transferred, by negative pressure (vacuum), until the autoclave is completely filled, and then pressurized to 13 bar, depending on the characteristics of the rocks, with a temperature ranging from 25°C to 45°C, for a period of 3 to 72 hours, for total impregnation of the waterproofing agent; After which, the autoclave is depressurized, and the waterproofing agent is transferred, by negative pressure (vacuum), to a storage tank, and the sheets are removed and placed on stacks for a period of 24 to 72 hours for drying, with the polymer curing being completed in 7 days, finalizing its interaction with the treated substrate.

[0013] The product used in this process is specially formulated to maximize its interaction with the microstructure of the stones, ensuring deep penetration and forming a resilient barrier against staining agents.

[0014] This method has been validated on samples of quartzite, meta-arenites and granites, demonstrating effectiveness in reducing Petition 870250069024, dated 05 / 08 / 2025, page 12 / 13 8 / 8 significant water absorption and porosity, making the proposal technically feasible and advantageous in an industrial context. Petition 870250069024, dated 05 / 08 / 2025, page 13 / 13

Claims

1 / 1 CLAIMS 1. SEALANT COMPOSITION FOR WATERPROOFING ORNAMENTAL ROCKS, characterized by employing a formulation composed of hydrogenated silicone oil, in a concentration that can vary between 2% and 45%, and isoparaffin, as a dispersing vehicle, in a proportion that varies from 55% to 98%.

2. SEALANT COMPOSITION, according to claim 1, characterized by the fact that it can alternatively use silane siloxane, in a concentration that can vary between 2% and 45%.

3. WATERPROOFING METHOD, employing the sealant composition as claimed in either of claims 1 and 2, characterized by comprising the following steps: . the sheets to be treated having a rough finish, completely clean and dry, with a pH of the material >4 and moisture <15; . the sheets being inserted into an autoclave, with negative pressure (vacuum) of up to 2 bar being applied; . the waterproofing agent being transferred, by negative pressure (vacuum), until the autoclave is completely filled, then pressurized to 13 bar, with a temperature ranging from 25°C to 45°C, for a period of 3 to 72 hours; . Depressurization of the autoclave, and transfer of the waterproofing agent, by negative pressure (vacuum), to a storage tank, with the sheets being removed and placed on stacks for a period of 24 to 72 hours for drying, with the polymer curing being completed in 7 days. Petition 870250016613, dated 02 / 28 / 2025, pp. 17 / 18