The development status of the conductive coatings industry

China Coatings Network
News: With the rapid development of modern science and technology in China,
conductive coatings
application scope and application areas have also increased, it is understood that in 1948, the United States announced the silver and epoxy resin into conductive glue patents, which is the earliest open conductive
coatings
. China also began to research and apply conductive coatings in the 1950s.
recent years, China's conductive coating research and development has made great progress, has developed a variety of strong conductive conductive coatings, such as ultra-fine silver powder conductive paint; Silver-plated copper powder as a filler, epoxy-polyurethane as the main
film-forming
conductive coating; A conductive coating with good electromagnetic shielding efficiency prepared for fillers with low cost and high antioxidant copper powder; Electromagnetic shield conductive coatings for military, home appliance and aerospace industries; It is used in electrostatic shield conductive coatings of polymer material housings. Oserli developed a series of electromagnetic wave conductive coatings, resistance value can reach 40mQ.
present, some domestic scientific research units and institutions of higher learning are actively developing and developing comprehensive performance better conductive coatings, and strive to use the fastest speed to shorten the gap between high-performance conductive coating applications and foreign countries.
conductive coatings in accordance with whether to rely on the addition of conductive fillers to achieve conductive functions can be divided into structural conductive coatings and doped conductive coatings, due to the excellent performance of doped conductive coatings, early conductive coatings research and development mainly focused on doped conductive coatings, and many have been commercialized, is still the focus of research and development in various countries.
For a long time, conductive coatings were prepared by adding filler particles with good conductivity to achieve conductive function, until 1976, when the University of Pennsylvania reported that iodine was added to insulated polyacetylene to transform it into a conductive polymer, and scientists began to develop structural conductive coatings. Until now, only sulfur nitride can be called pure conductive properties of the substation resin, other polymers can be used as the conductive coating substation resin mostly need a chemical reaction process, in order to achieve a strong conductivity. Experimental studies have studied the use of hospital-based benzene as a solvent, epoxy resin and camphor sulfonate doped polyphenylamine to prepare a conductive coating of epoxy resin, when the percentage content of polyphenylamine between 0.6% to 0.9%, coating thickness of 200um, the conductivity of the coating can reach MO-'S/cm, at this time, the coating not only has good anti-static properties, but also for steel and other metal surfaces have better corrosion resistance.
foreign countries in the nano-conductive coatings and fabrics for the development and development of conductive coatings have also given sufficient attention. Nano-type electromagnetic shield conductive coatings apply the latest surface chemistry technology, the use of new high-polymers as the main film-forming substances, filled with nano-grade conductive metal powder, high-speed dispersion, so that the coating has both metal powder high conductivity, anti-static and electromagnetic shielding efficiency, but also has a better color and adhesion performance. Nano-composite conductive coatings are prepared by adding solvents and functional additives for various coatings.
this composite conductive coating is easy to construct and can be used in traditional coating processes. And the curing and drying time is short, in plastic (9725, 90.00, 0.93%) and other polymer material surface has good adhesion properties. Conductive coatings resistant to mechanical stress consist of water dispersions (polyurethanes contain more than 50% content) and non-conductive powders in the core and conductive in the housing. Mix 100.0 parts with cation polyester-polyurethane with 0.5 to 1.0 mass servings of hydroxyethyl cellulose and PH between 9.9-9.5 and add 60.0 parts Silver-plated borate glass (934,10.00, 1.08%) particles, dried and cured into a film at 150 degrees Celsius, made fabric with conductive coating, conductive current can reach 1.8A, showing excellent anti-static performance.
with the growing maturity of conductive coatings research and development technology, more successful development of new conductive coatings, will contribute to more areas.