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    Home > Coatings News > Paints and Coatings Market > Recycling of hazardous wastes - solutions for the reuse of solvent-based coatings and raw materials

    Recycling of hazardous wastes - solutions for the reuse of solvent-based coatings and raw materials

    • Last Update: 2020-12-10
    • Source: Internet
    • Author: User
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    The rapid development of coatings has brought the coatings industry into a new era of continuous improvement in many dimensions, including customer demand, cost, environment, coating durability and application range. Creating environmentally friendly coatings that are acceptable in cost and product performance is always challenging for research and development teams. Every year, some new formulations and some better-performing products come out to
    Chinese
    . Over the past decade, formulas in our industry have changed faster than ever before. Formula changes often require some production experiments to replace the original raw materials and material inventory with newer materials. With the continuous upgrading of the formula, batch after batch of raw materials and materials are no longer applicable to the industry phase-out. Batch errors and the obsolescence of raw materials are by-products of innovations and product upgrades in the paint and coatings industry.
    For purpose
    there is now a new process for reusing failed products, waste materials, gel products, washing solvents, sub-products, customer return products, unavailable and unsexploitable raw materials or various types of coatings. Using his industry experience and professional understanding of different types of resins, pigments, additives, solvents and coatings, the authors have successfully demonstrated that it is possible to reduce waste from plant production processes by finding ways to reuse renewable compounds from multiple manufacturers or Matawala Group of Industries' own product lines, which would otherwise have been handled by Tavala Industries. Once the properties of chemistry, composition, compatible, resin and solvent have been determined, the recycling of these items can be determined.
    this article with data and new processes that can be applied to oily paints and solvents. Today, advanced and environmentally friendly water-based formulations are not widely available worldwide, and traditional solvent-based coatings are still an indispensable coating solution worldwide.
    have successfully developed innovative and environmentally friendly methods for resource recovery and reuse of paints and latex paints. Year after year, Matawara Industries is able to convert more and more solvent-based coatings into a new recyclable product. We have several projects to purchase latex paint cans from markets, homes, factories and counties. These coatings are used in the production of mud, gypsum, lane closures and renewable latex paint. This paper will also discuss the environmental impact of the coating process and the economic and ecological benefits of the new process.
    processes
    important considerations for solvent-based coatings and resins include:
    the structure, compatibleity, density and boiling point of
    solvents and resins;
    solvents play an important role in the recovery of coatings and resins, as they determine the compatibleness of coatings or resins and the channels through which they can be recycled. If we start the manufacturing process without a complete understanding of the product, we may be able to produce inappropriate batches. The material may become cake-like in shape, blocky, debris, hardened such as rock blocks or loss of viscosity. Successful resource recovery is based on studies of the molecular structure, boiling point, dispersion capacity and density of solvents in coatings or resins.
    solvent and resin compatible with
    Hansen solubility parameter values
    Hansen solubility parameter values are based on the dispersion key (D), polarity bond (P) and hydrogen bond (H). This information includes the interaction of molecules with other solvents, as well as with polymers, pigments, nanoparticles, etc. This knowledge allows us to understand solvents and resins rationally, for example, and to match solvents and resins well according to Hansen solubility parameter values. "Good" solvents (effectively dissolved solutes) or "bad" solvents (expensive or harmful to health or the environment) can also be reasonably replaced. Table 1 shows the difference between non-polar, polar non-proton and polar proton molecules in numerical form -- polar molecules have more polar bonds, and proton solvents have more hydrogen bonds. Because numerical expressions are used, they can be visually compared by numbers. For example, acetylene has more polarity than acetone, but fewer hydrogen bonds.When we study the detailed properties of solvents when bonding with resins, pigment metals and fillers, we can determine the use of these products and break them down into new or similar products for use. For example, toluene and benzene are more compatible with xylene than mineral alcohol. Xylene is also well compatible with mineral alcohol. Some solvents can be completely soluble in another solvent, some can only be partially soluble in solvents, and some are completely insoluble in solvents. When reacting with resins and pigments, solvents no longer exist in separate forms and become more compatible most of the time. The use of additives and pigments to improve compatibility plays an important role.
    boiling
    is an important d'issue because it determines the rate of evaporation. At room temperature, a small amount of low-boiling solvents such as ether, dichloromethane, or acetone evaporate in a matter of seconds, requiring higher temperatures, air circulation, or vacuuming if you want to quickly evaporate high-boiling solvents such as water or dimethyl methylene.
    low boiling point boiler: boiling point is less than 100 degrees C (boiling point of water),
    .medium boiling point boiler: 100 degrees C to 150 degrees C,
    high boiling point boiler: 150 degrees C or more.
    density
    most organic solvents are less dense than water, which means they are lighter than water and form solvent layers on water. In addition to most halogenated solvents, such as dichloromethane or chloroform, they sink to the bottom of the container and the upper layer is water. In chemical synthesis, it is important to use a split funnel to isolate compounds stored between solvents and water.
    usually use specific gravity instead of density. The specific gravity is defined as the density of the solvent divided by the density of water at the same temperature. Therefore, the specific gravity is a unitless value. It easily shows whether an insoluble solvent will float on the surface (SG<1.0) or sink to the bottom (SG>1.0) when mixed with water.
    , mass production
    once we classify compatible solvents, raw materials are classified according to color, color, density and gloss. Depending on the inventory, products with the same gloss, color and density are mixed together as transition slurry. This is an important material mixing inspection phase, where the slurry is made up of paints, resins, solvents, pigments or wastes/wastes, etc. The practicality of the final product is usually given priority before these slurry is manufactured. We repeatedly verify the final gloss and the proportion of resins/solvents/pigments/fillers based on density, hardness, gloss, weight and viscosity.
    , we produced floor paint, primer, mud, texture paint, paint, asphalt paint and so on. The formulation, mixing of ingredients, processes and other raw materials for these coatings remain an important part of the entire coating. Various products are incorporated into several paint brands and markets. Through this new recycling process, we can save many important raw materials that would otherwise need to be buried or mixed into recycled products to eventually serve the market. Our products are also produced without exploiting resources, thus saving energy and benefiting the environment.
    scope of application
    recycling of waste is considered in a comprehensive way, taking into account cost/financial benefits and research and development, as required by coating reuse projects.
    the recycling of latex paints and oily coatings
    1-4 shows the possibility between waste recovery and reuse. This data comes from the results of the DNR/DATCP survey in the summer of 2015 (Wisconsin).and benefits of oily coating reuse
    the reuse of paint saves the process and cost of preparing paint from scratch. For example, when making paint, resins are made with fatty amines, natural vegetable oils, orthane, pyrethrenic acid, Malay acid and monosomes. This process utilizes energy, resources, energy and a small natural mixture. If we can recycle these paints, we can save these raw materials and energy.
    addition, the way we treat mixed waste that cannot be saved is to put it directly into the fire. And for those new resins, solvents, metal desiccants, pigments, additives and so on are bound to be recycled. We have to extract more gum from more and more trees, find more minerals to obtain minerals, and extract crude oil from the ocean to make special monosomes and hydrocarbons for solvent-based coatings. This savings method has more value and utility than the mixed solvents that paint waste can provide.
    Patented Products, Research and Processes For more than
    years, the author has conducted detailed scientific research through Matawara Industries and applied to the U.S. Patent and Trademark Office for the recycling of oily coatings, describing an innovative process for oily paint recycling from a unique perspective. The patent covers a complete solution for solvent-based product regeneration at the same cost as latex paint recycling.
    in developed countries, the use of these coatings is small, but it is of great benefit to economies that need infrastructure development. Division I produces asphalt coatings and several other coatings,
    are low-end resins and solvents. These low-end coatings are commonly used as primers. In addition, we have developed several primers for wood and metal. The technical data sheet has been incorporated into the Kuwaiti government sector, and the data include details of aolic acid resins and their CAS as part of the new formulation. These products are put on the market for inspection.
    solvent mixtures are likely to be compatible with other petrochemicals, oils or flammables. Solvent-based coatings, such as alicic acid magnetic paint, pigments, ink products, primers, paint thinners, detergents, alicylic acid resins, epoxy resins, curing agents, etc., can be recycled, thereby saving costs and raw materials, environmental protection.
    : PCI, Huzaifa Matawala, CEO, The Matawala Group of Industries (Mumbai, Dubai, New York)
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