Sound Dampening Coatings for Automotives

Low-frequency damping material comprising a vibration-damping substrate, a sound-absorbing filler, and a dispersant. The material comprises a vibration-damping substrate comprising acrylic emulsion, polyurethane resin, polyether polyol, silicone rubber emulsion, polyester resin, expanded graphite, hard particles, and carbon fiber. The sound-absorbing filler comprises polyacrylonitrile fiber and ceramsite. The dispersant is added during the preparation process to enhance the material's performance characteristics, including improved frequency response and temperature stability. The material can be molded into various shapes for specific applications, such as vibration reduction and noise reduction in mechanical equipment, automobiles, aircraft, and engineering and construction.

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A low-density high-damping sound insulation coating comprising a polymer resin, a filler, and an additive that provides superior sound insulation performance while maintaining low density. The coating combines a polymer resin with a filler and an additive that enhances damping properties through nano-silica reinforcement. The additive is specifically formulated to maintain the coating's low density and hardness while preventing foam formation. The coating's unique combination of polymer, filler, and additive achieves high sound insulation while minimizing weight and maintaining structural integrity.

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A waterborne damping paint for vehicles that achieves high damping performance while maintaining wide temperature stability. The paint combines a waterborne acrylic emulsion with a modified hollow glass microsphere (HGMS) system. The HGMS comprises a glass microsphere grafted with a silane coupling agent, which enhances compatibility with the emulsion. The emulsion and HGMS blend in a 1:3 ratio, with the emulsion containing a 48-52% water content and a glass transition temperature of 5-20°C. The emulsion polymerizes to form a stable film, while the HGMS provides superior sound insulation properties. The paint formulation enables a wide operating temperature range (from 5°C to 120°C) and high damping peak values, making it suitable for automotive applications requiring advanced noise reduction capabilities.

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A water-based noise reduction coating for electric vehicles that specifically targets high-frequency noise reduction. The coating employs a proprietary emulsion formulation combining pure acrylic and styrene acrylic polymers with functional powders containing modified carbon fiber and mica. The coating's unique composition enables effective noise reduction in both low- and high-frequency regions, making it particularly suitable for electric vehicles with high-frequency noise issues.

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Water-based sound insulation coating comprising a water-based hyperbranched acrylic modified alkyd resin, water-based low-molecular-weight epoxy resin, water-based phenolic ammonia resin, and organic color paste. The coating combines these components in a specific ratio to achieve superior sound insulation properties, including reduced surface tension and improved wetting agent performance. The formulation enables effective sound absorption while maintaining adhesion and corrosion resistance.

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A waterborne noise-reducing coating for automobiles that achieves effective sound absorption and insulation through a novel nanostructured film. The coating combines rutile titanium dioxide with graphene aerogel, strength film former, and polypropylene fibers to create a multi-layered nanostructure. The film-forming agent is a blend of SWF-05 and WZ-624 special film-forming agents. The coating formulation includes a water-based emulsion, rutile titanium dioxide, strength film former, graphene aerogel, methyl acrylate, methyl methacrylate, divinylbenzene, acrylamide, isoprene, silica, dispersant, wetting agent, thickener, defoamer, and polypropylene fibers. The formulation is optimized for waterborne application and provides superior noise reduction performance compared to conventional coatings.

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Aerogel sound-absorbing, noise-reducing thermal insulation coating with enhanced sound absorption and noise reduction properties. The coating combines aerogel powder with a proprietary blend of acrylic emulsion, open-cell perlite, and other additives to create a high-performance insulation system. The aerogel emulsion serves as a matrix for the aerogel particles, while the perlite provides thermal insulation properties. The coating achieves superior sound absorption and noise reduction through its unique aerogel structure, which enhances sound wave transmission while suppressing sound reflections.

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Water-based damping material for automobiles that eliminates the need for toxic asphalt-based damping materials while maintaining high-performance sound insulation. The material comprises a water-based polymer matrix with integrated phase change material (PCM) that slowly vaporizes during baking, suppressing bubbling while maintaining structural integrity. This approach enables the material to achieve superior sound insulation performance while minimizing the environmental impact of traditional damping materials.

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Damping coating with an interpenetrating network structure and a preparation method, wherein the coating comprises a polyhydroxy polyurethane resin and different molecular weights of the same type of epoxy resin.

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A spray-type sound-absorbing and sound-insulating material for vehicles, ships, and other high-speed applications that provides effective noise reduction through a novel spray formulation. The material combines a water-based emulsion with sound-absorbing nano particles and a proprietary foaming agent to create a sprayable, compact, and environmentally friendly solution. The spray formulation enables rapid curing to form a durable, high-performance coating that can be applied to existing surfaces.

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A sound insulation coating that prevents sound propagation and controls noise transmission through a novel combination of inorganic and organic materials. The coating comprises a matrix of bentonite, cellulose, acrylic emulsion, silicone acrylic emulsion, mineral fiber, mica powder, microbead powder, talc, kaolin, and diatomaceous earth, with specific particle sizes for each component. The coating achieves superior sound insulation properties through its unique blend of inorganic and organic components, which work together to absorb and dissipate sound energy.

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Water-based damping coating for automotive interiors that combines improved performance with enhanced environmental sustainability. The coating utilizes a polymer resin matrix with strategically selected fillers and additives, which enables enhanced vibration damping, thermal insulation, and sealing properties. The coating can be applied directly to metal surfaces through a single-stage process, eliminating the need for multiple coats and multiple equipment. The formulation achieves superior performance while maintaining low VOC levels and environmental compatibility.

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Epoxy-based sound-absorbing coatings for automotive seat parts that combine the benefits of traditional acoustic foam materials with advanced waterborne technology. The coatings employ a proprietary epoxy resin system, specifically designed to enhance sound absorption while maintaining performance in waterborne applications. The system integrates a high-performance epoxy resin with a silicone-modified epoxy auxiliary agent and a specialized sound-absorbing additive, resulting in a coating that delivers superior sound absorption performance compared to traditional acoustic foams.

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A water-based damping coating that combines enhanced anti-corrosion and damping properties with improved adhesion and environmental sustainability. The coating comprises a network cross-linked structure formed by a water-based resin and a prepolymer resin, with a mass fraction of each component being 15% water-based resin, 7% prepolymer resin, 2-10% titanium dioxide, 2-10% hollow glass beads, 0-10% zinc phosphate, 0-10% aluminum tripolyphosphate, and 0-10% composite silicate rock slices. The coating exhibits superior performance in both damping and corrosion resistance, with enhanced adhesion properties compared to conventional coatings, while minimizing volatile organic compounds (VOCs) and environmental impact.

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Water-based damping paint for vehicle vibration and noise reduction that achieves superior shock absorption, sound insulation, and heat preservation properties. The paint combines a waterborne resin with high-quality fillers and additives, featuring fast drying, excellent adhesion, and polishability. The formulation provides effective noise reduction through structural damping mechanisms, while the waterborne formulation enables rapid drying and low-temperature impact resistance. The paint meets stringent fire rating standards and exhibits excellent performance in vehicle applications, particularly in areas where thermal management is critical.

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Water-based damping coating for automotive applications that achieves superior damping performance through a novel microporous structure. The coating comprises a water-based formulation with a specific glass transition temperature range, TPU powder with optimized melting point, and a foaming agent with the appropriate temperature. The coating is prepared by spraying the wet film, followed by surface drying, baking, and curing. The unique microporous structure enhances damping properties while maintaining chemical resistance and flexibility. The coating demonstrates improved damping performance compared to conventional damping coatings, particularly at room temperature.

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A sound insulation coating technology that combines carbon fiber reinforcement with piezoelectric and conductive materials to create a multi-layered composite structure. The coating forms a large number of reflective interfaces through a process involving carbon fiber particles measuring 5-15 microns in diameter and 1 mm in length, combined with piezoelectric materials like PVDF and BaTiO3, and conductive materials like silver oxide and graphite. The composite structure exhibits enhanced sound absorption properties while also generating electrical current through piezoelectric effects, thereby converting sound energy into heat.

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A sound absorption and noise reduction coating composition that achieves superior noise reduction compared to conventional mineral fiber-based coatings. The composition comprises biochar particles with a particle diameter of 100-450 nm, in addition to acrylic emulsion, film-forming agents, surfactants, thickeners, and water. The biochar particles are specifically engineered to enhance sound absorption through their unique structural properties, resulting in a coating with a high sound absorption coefficient that significantly reduces noise pollution.

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Spray-applied water-based coatings for acoustic barrier components achieve improved noise reduction through a novel dispersion of copolymer and acrylic formulations. The dispersion combines n-butyl acrylate, styrene, and acrylonitrile monomers with water in a specific ratio, with optional additives like fillers and biocides. These dispersions are applied to sound absorbing materials, such as fibers or foams, and cured through controlled spray application. The resulting coatings enhance sound attenuation while maintaining durability and aesthetic appeal.

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Non-aqueous sound insulation paint composition comprising a solvent-free polyacrylate binder with a K-value in the range of 10 to 35, measured as a 1% solution strength in tetrahydrofuran at 21°C, and inorganic fillers. The composition provides effective vibration damping for vehicle and machine components, particularly in areas subject to high humidity, through its unique combination of low water absorption and high damping performance.

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