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BR-102024017611-A2 - SUSTAINABLE MINERAL COATING

BR102024017611A2BR 102024017611 A2BR102024017611 A2BR 102024017611A2BR-102024017611-A2

Abstract

This patent application refers to the production of mineral coatings using mineral pigments obtained from iron ore mining waste and tailings, as well as other minerals considered mining waste or sterile material. The proposed formula consists of a PVA resin base, representing 50% to 70% of the composition, while the remainder is composed of the aforementioned minerals. These coatings are free of volatile organic compounds (VOCs), meeting international regulations and the demands of conscious markets, promoting sustainability by transforming discarded materials into useful and ecological products. Coatings are materials applied to a surface to provide protection, decoration, or both. They are widely used in various industries and applications to improve the durability, resistance, and aesthetics of diverse substrates, such as metals, concrete, wood, plastics, among others.

Inventors

  • ANA ELISA MURTA TOLENTINO

Assignees

  • M PRODUCOES LTDA

Dates

Publication Date
20260310
Application Date
20240827

Claims (4)

  1. 1. Characterized by the use of mineral pigments obtained from mining waste and tailings in a formulation built on a PVA resin base, representing 50% to 70% of the composition.
  2. 2. Characterized by transforming mineral waste into useful and sustainable products, free of volatile organic compounds.
  3. 3. Characterized by aligning with international regulations and the demands of conscious markets, as well as being compatible with resins such as polyvinyl acetate or water-based mixtures of CAL and PvA.
  4. 4. Characterized by resulting in an infinite palette of color tones and textures, offering excellent technical performance and durability, while presenting low cost and properties comparable to commercial paints.

Description

This invention patent relates to the production of mineral coatings using mineral pigments obtained from iron ore mining waste and tailings, as well as other minerals considered mining waste or sterile material. The proposed formula consists of a PVA resin base, representing 50% to 70% of the composition, while the remainder is composed of the aforementioned minerals. These coatings are free of volatile organic compounds (VOCs), meeting international regulations and the demands of conscious markets, promoting sustainability by transforming discarded materials into useful and ecological products. Coatings are materials applied to a surface to provide protection, decoration, or both. They are widely used in various industries and applications to improve the durability, resistance, and aesthetics of diverse substrates, such as metals, concrete, wood, plastics, among others. 002 There are various types of coatings, such as decorative, protective and functional; the mineral coating that is the subject of this patent is specifically decorative, meaning it is used to improve the aesthetic appearance of surfaces, offering a wide range of colors, textures and finishes. 003 The current market already has VOC-free coatings (Volatile Organic Compounds). VOCs are chemical substances that can easily evaporate at room temperature and, when released into the atmosphere, can react with other gases and contribute to the formation of air pollutants harmful to human health and the environment, such as tropospheric ozone and aerosol particles. However, the innovation presented in this patent application, in addition to being VOC-free, lies in the complete utilization of mining waste, which is normally discarded as sterile material or tailings. This approach not only reduces the environmental impact of mining but also produces high-quality coatings at a reduced cost. 004 The colors and textures obtained in the developed coatings differ significantly from conventional products on the market, given the use of pigments derived from mining waste, which have infinite forms and colors. These colors are compatible with resins such as polyvinyl acetate (PVA), offering a sustainable alternative that maintains durability and resistance comparable to traditional commercial coatings. 005 The manufacturing process for sustainable mineral coatings is simple and easily applicable, offering significant benefits to all parties involved. Mining waste and overburden, already in granular or powdered form due to the extraction process itself, are collected. This aspect is particularly advantageous for the coating manufacturer, as it eliminates the need for pulverizing the rocks, a generally expensive step in the pigment production process. 006 Thus, the pigments arrive already pulverized, ready for use. Furthermore, this process is also beneficial for mining companies, which produce large quantities of waste and overburden. 007 By supplying these materials for the manufacture of coatings, mining companies can give a useful purpose to these by-products, contributing to more sustainable waste management. For the consumer, the resulting coating offers several advantages: it is an extremely durable, high-coverage, low-cost, and non-toxic product. Furthermore, it is environmentally friendly, as it does not contain volatile organic compounds (VOCs) that are harmful to the environment and human health. These materials, dry or not, are then mixed with a polyvinyl acetate (PVA) resin base. 008 The proposed formulation consists of 50% to 70% PvA and the remainder of pigment extracted from the aforementioned minerals. This proportion offers high coverage, allowing the paint to be applied directly to various surfaces, both interior and exterior, without the need for prior preparation. This eliminates the use of primers or other base treatments, simplifying the painting process and reducing costs. Increasing the percentage of base reduces the covering power and color intensity, without compromising the product's quality or its protection against weathering, such as rain and erosion. 009 Furthermore, recent studies, such as that conducted by Galvão et al. (2018), show that iron ore tailings, when used as pigments, contribute significantly to the production of sustainable coatings. The results indicate that PvA-based coatings with tailings pigments demonstrated excellent technical performance and durability, presenting low cost and properties comparable to commercial coatings, in addition to a wide range of practical applications in civil construction, due to their stability and the variety of colors and textures that can be achieved. 010 In the attached drawings, we have the following list of figures: Figure 1: Terracotta colored texture Figure 2: Burnt cement colored texture Figure 3: Ivory Beige colored texture Figure 4: Ice White colored texture