July, 2012
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A zero-VOC water-based epoxy topcoat has been formulated
Since 1982, when the first bisphenol A-based solid epoxy dispersion and modified amine system came to market as an adduct suitable for metal protection, water-based epoxy systems have been used for high-performance industrial primers and topcoats over metal due to their fast dry time, corrosion resistance, good pot life and low odor. Although water-based epoxy has successfully replaced traditional solvent-based epoxy/polyamide coatings in many high-performance industrial applications, the VOC content of these water-based epoxies is typically 200-350 g/L. So now,Read More …
Powder coating finish continues to gain further acceptance
As the powder coating finish continued to gain further acceptance, other issues involving coatings were coming to light in Europe. These issues would affect the way the industry, as a whole, would progress through the 1970s and into the present. The highly industrialized nations of Western Europe,with population densities of more than 1,000 people per square mile, were fighting ever-increasing air and water pollution hazards. The paint and coatings industries of these countries feared legislation similar to the “Los AngelesRead More …
The dominant overall finishing trend will continue to be replacement of liquid finishing with powder coating for environmental impact reasons
Powder coatings today The dominant overall finishing trend will continue to be replacement of liquid finishing with powder coating for environmental impact reasons. Improvements in both coating and application technology will promote much broader powder use. The technology improvements are driven by needs primarily in the automotive, appliance and general industrial markets. The improvements encompass raw material, coating manufacturing and application sophistication changes. The automotive industry continues to expand powder coating from under-hood, trim and wheels to body applications. ImprovementsRead More …
All coatings products sold in China are required to meet the Compulsory Coatings Standards
After years of continuous effort, there are more than 400 coatings and related standards in China, including national and industrial standards, which form a complete standard system. Of these standards, 58% are general, basic and method standards, and 39% are product standards. The compulsory coatings standards in China come from technical committees (SAC/TC) and administrative departments, and can be classified into national standards (labeled as GB) and industrial standards (labeled as JC, abbreviation of the building materials industry). If thereRead More …
Some Common Glossary used in the powder coating industry
Salt Spray Test – Corrosion test using salt (NaCl) sprayed as a mist in a heated humidity chamber to simulate seashore conditions, or to accelerate corrosion at a controlled rate. ASTM B117. Sandblast – Blast cleaning using sand as an abrasive. Scale – Rust occurring in thin layers–commonly found on hot rolled steel. Sealed Coating – Primer. Coating used for the prevention of excessive absorption of a first coat of paint by the substrate. Seeding – Formation of small agglomeratesRead More …
Physical and chemical properties test for powder coating films
Films ( Powder Coatings ) Physical Test Primary Test Equipment Characteristics Procedure (s) Film Thickness ASTM D 1186 Magnetic Film Thick Gauge, ASTM D1400 Eddy Current Induce Gauge Impact ASTM D2794 Impact Tester Flexibility ASTM D522 Conical or Cylindrical Mandrel Adhesion ASTM 2197 Balanced-Beam Scrape-Adhesion, ASTM D3359 Cross Hatch Cutting Device and Tape Hardness ASTM D3363 Calibrated Drawing Leads or Pencils Abrasion Resistance ASTM D4060 Taber Abrader and Abrasive Wheels ASTM D968 Edge Coverage ASTMRead More …
Anti-reflective coating is a type of optical coating applied to optical devices to reduce reflection
Anti-reflective coating or antireflection (AR) coatings are a type of optical coating applied to the surface of lenses and other optical devices to reduce reflection. This improves the efficiency of the system since less light is lost. In complex systems such as a telescope, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, suchRead More …
What is Polyurea coating and Polyurethane Coatings
Polyurea coating is basically a two-component system based on Amine terminated prepolymer crosslinked with Isocyanate which forms the urea linkages. The crosslinking between reactive polymers take place at a rapid speed at ambient temperature. Normally this reaction does not require any catalyst. Since the Pot-life of such coating is within seconds; special type of Plural Component spray gun is require to carry out the application. The coatings can build up to 500 to 1000 microns of thickness in a singleRead More …
Breif introduction of Fusion bonded epoxy powder coating
Related Products : FBE Powder Coating Related Articles: FBE Powder Coating Fusion bonded epoxy coating, also known as fusion-bond epoxy powder coating and commonly referred to as FBE coating, is an epoxy based powder coating that is widely used to protect steel pipe used in pipeline construction, concrete reinforcing bars (rebar) and on a wide variety of piping connections, valves etc. from corrosion. FBE coatings are thermoset polymer coatings. They come under the category of ‘protective coatings’ in paints andRead More …
What is Moisture-cured polyurethane
Moisture-cured polyurethane is one-part polyurethane that its cure is initiatedly environmental moisture. The moisture-curable polyurethane is mainly consists of isocyanate-terminated pre-polymer. Various types of pre-polymer can be used to provide required property. For instance, isocyanate-terminated polyether polyols are used to provide good flexibility due to their low glass transition temperature. Combining soft segment, such as polyether, and hard segment, such as polyurea, provides good hardness and flexibility of coatings. Moreover, the properties are also controlled by selecting types of isocyanatesRead More …
D5 Creation