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5013results about "Powdery paints" patented technology

Reactive hyperbranched polymers for powder coatings

Novel powder coating compositions containing reactive hyperbranched polymers are disclosed and claimed. Preferred embodiments include powder coating compositions formed from hyperbranched polyesters having terminal hydroxy, carboxy, epoxy, and isocyanate groups. Preferred hyperbranched polyesters are formed from alpha , alpha -bis-(hydroxymethyl)-propionic acid, which act either as crosslinkers, adhesion promotors, or flow and leveling agents. A process for the synthesis of powder coating compositions is also disclosed which involves (a) self condensation of one or more of the multifunctional monomers to form the hyperbranched polymer, optionally, in the presence of suitable reactive end-capping moieties which are described herein; (b) melt blending of the hyperbranched polymer with suitable amounts of one or more of polyesters, epoxy resins, blocked urethane resins, or acrylic resins, a crosslinker, and one or more of suitable additional ingredients including degassers or flow and leveling agents, to form a flake; and (c) grinding and sieving of the flake to form the powder coating composition. These compositions exhibit improved flow and curing properties. These compositions can therefore be formed into thin films and can be cured at low temperatures to form smooth surfaces. Additionally, these films are hard and exhibit enhanced impact resistance properties than the conventional polyester resins. Thus, these powder coating compositions find utilities in automotive, packaging, and appliances.
Owner:HERBERTS GMBH

Environmental-protection anti-corrosive heat-dissipation powder paint, and preparation method and application thereof

The invention discloses an environmental-protection anti-corrosive heat-dissipation powder paint, and a preparation method and application thereof. The environmental-protection anti-corrosive heat-dissipation powder paint comprises the following raw materials in parts by weight: 40-90 parts of matrix resin, 2-40 parts of curing agent, 0.5-10 parts of carbon nanotube, 0.5-2 parts of additive, 0-4.5 parts of hexagonal boron nitride, 0-15 parts of aluminum nitride, 0-10 parts of magnesium nitride, 0-10 parts of silicon carbide and 5-30 parts of pigment and filler. The composition and proportioning of the raw materials of the powder paint disclosed by the invention are scientific and reasonable. The experimental result indicates that the powder paint has the advantages of favorable heat-dissipation effect, high efficacy enhancement rate (higher than 60%) and favorable cooling effect (more than 20 DEG C), and can effectively solve the problem of poor heat-dissipation effect in the high-power electronic product, thereby prolonging the service life of the electronic product. The powder paint disclosed by the invention is free of organic solvent, and is environment-friendly and safe; the powder paint disclosed by the invention also has favorable comprehensive properties, such as flexibility, hardness, adhesive force and the like, and stable chemical properties; and the coating formed by the powder paint has the advantages of high corrosion resistance and shock resistance, favorable insulation property and wide application range.
Owner:TIGER DRYLAC TAICANG

Micro-nano coating material with low surface energy and preparation method thereof

ActiveCN106085070AEasy to control surface topographyEasy to control the size of the surface energyPolyurea/polyurethane coatingsPowdery paintsEtchingMicrosphere
The invention belongs to the technical field of functional materials, and particularly relates to a micro-nano coating material with low surface energy and a preparation method thereof. The preparation method comprises the following steps of mixing composite microspheres with micro sodium structure and hydrophobic nature, matrix resin with contact angle more than 90 degrees with coating film, solvent, powder, and additive, and adopting a co-mixing method, an in-situ emulsion polymerizing method, an in-situ solution polymerizing method, an in-situ concentration and polymerizing method, an in-situ addition and polymerizing method and the like, so as to prepare the coating material with micro-nano structure; performing spraying, brushing, roll coating, photo-etching, 3D (three-dimensional) printing, mechanical processing and the like, drying and curing at the temperature of 0 to 1000 DEG C, and coating the coating material with micro-nano structure onto different matrix surfaces, so as to obtain the micro-nano coating material with low surface energy and groove structure. The micro-nano coating material has the advantages that the preparation technology is simple, the coating hardness is high, the water-resistant property is good, the adhesion force to different matrix surfaces is strong, and the micro-nano coating material can be used for self-cleaning, resistance-reducing, denoising, anti-icing and other functional materials.
Owner:FUDAN UNIV

Novel fast-set anticorrosion and wear-resistant epoxy powder coating and preparation process thereof

The invention relates to the field of chemical coating, in particular to epoxy powder coating applied to material conveying steel belts in oilfield oil pumping pipelines or coal transportation in the oil industry. In a formula, the coating comprises the following components in percentage by weight: 32-56% of epoxy resin, 8-14% of curing agent, 30-50% of pigments and fillers, 2-10% of resin modifier and 2-6% of assistant, wherein the epoxy resin in the formula is bisphenol A type epoxy resin, a mixture of the bisphenol A type epoxy resin and phenolic aldehyde modified epoxy resin, and phenolic aldehyde modified epoxy resin, and the curing agent is phenolic hydroxyl resin. The epoxy powder coating disclosed by the invention belongs to fast-set anticorrosion and wear-resistant epoxy powder coating, has the granularity being 10-125 mu m, is applied under general curing conditions that the curing temperature is 180-200 DEG C and the curing time is 3-10min, can be regulated according to user needs and is superior to like products in anticorrosion performance, coating film mechanical performance and wear resistance, a preparation process is simple, the labour productivity can be obviously increased, and the epoxy powder coating is suitable for industrialized production.
Owner:JIANGSU LANLING POLYMER MATERIAL CO LTD

Powder coating containing aerogel particles and preparing method thereof

A powder coating containing aerogel particles and a method for preparing the same relates to a powder coating and a preparation method, which solves the problem that the existing heat insulating composite material containing aerogel is not suitable for making thinner heat insulation material and spraying insulation layer on the component surface, and the aqueous coating has high water content, long construction period and low heat insulation property. The coating of the invention is prepared by 5-80 percent of aerogel particles and 20-95 percent of powderedd resin by volume percentage, and the method includes the following steps: firstly, aerogel, resin and additive are mixed by volume percentage; secondly, the mixed materials are delivered into a melting-extruder melt and extrude; thirdly, the extrudate is pressed into thin sections; fourthly, the thin sections are ground into small pieces by roller machine; fifthly, the small pieces are conveyed into an air staged milling equipment to grind, so as to obtain the powder coating. The powder coating containing aerogel of the invention has advantages of environmental protection, clearness, economy, high efficiency, and good heat insulation property, sound insulation property and surface hydrophobicity.
Owner:HARBIN INST OF TECH

Powder coating with antibacterial function and preparation method and application thereof

The invention discloses a powder coating with an antibacterial function and a preparation method and an application thereof. The powder coating comprises the following raw materials in the parts by weight: 60-90 parts of resin, 2-40 parts of curing agent, 1.5-10 parts of antibacterial agent color concentrate, 0.5-2 parts of flatting agent, 0-4.5 parts of defoaming agent, 4-30 parts of pigments andfillers and 0-15 parts of other auxiliary agents. The powder coating provided by the invention has the functions of bacterium resistance and broad spectrum and has strong functions of sterilizing andinhibiting various bacteria and mould fungi; the heat resistant temperature of the inorganic antibacterial agent can reach 500 DEG C, and the inorganic antibacterial agent has good heat stability; and the inorganic antibacterial agent is a silver ion antibacterial agent using glass as a carrier, has good transparency and can be made into a transparent antibacterial powder coating which has the advantages of safety and wide application range. The preparation method provided by the invention has reasonable processes, strong operability and high qualified rate of the prepared finished products and can realize industrial production in a large batch.
Owner:TIGER DRYLAC TAICANG
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