pigment manufacturer benda-lutz celebrates 100-year anniversary

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2 JANUARY 2011 FOCUS ON POWDER COATINGS radiation curable powder coatings. The market potential for these products is the only major growth area. They are proving their value in many new market opportunities. A kick-start is all that is needed to firmly establish them. The leading powder coatings producers continue to expand their production capacities in the main global regions where expansion is still progressive. Akzo Nobel has targeted expansion in China, while Jotun is targeting specific market opportunities. Its latest launch is a furniture powder coatings range, Era-Coat MDF. These products include an engineered primer and topcoat, available in 20 colours and textures. Formulated to give a seamless coated surface, coating both back and front of the MDF, the products are claimed to offer scratch resistance, water, stain and impact resistance. Jotun is certainly backing powder coatings as an essential item in its wide range of conventional decorative and functional coatings. In Europe and North America the situation is still relatively static although demand is an improvement upon the 2009 sales. A recent industry report predicted a growth rate of about 2.7% between 2009 and 2012 although there is more interest being shown in the architectural market, which has always been small in relation to the significant role of these powder coatings in other global markets. There is little doubt that the major criticism of powder coatings is their high curing temperatures. An inevitable decline of thermosetting powder coatings will occur in the troubled industrial climate of the US, with the development of wet-on-wet processes, which offer increased efficiency and cost reduction. While they still retain the advantage of being the only truly green technology, there is no future for thermosetting powder coatings. The one bright spot is the steady growth in the US market of UV curable powder coatings. This new technology was first commercialized in the US and I predict that the positive advantages shown by these systems will revitalize the US powder coatings market in the near future, leaving other global markets a challenge to their own integrity. Sid Harris TECHNICAL Improving adhesion of powder coatings to aluminium substrates The most important properties of a protective coating are: anti- corrosive action and adhesion to the substrate. The usual method employed to improve adhesion on metal substrates is surface pre- treatment prior to application of the coating. A team of researchers at the University of Belgrade has examined the adhesion of polyester powders on differently pre-treated aluminium surfaces by anodizing, with and without sealing, by phosphating and by silane film deposition. They measured dry and wet adhesion and it was shown that under dry conditions all polyester powder coatings showed very good adhesion but the silane treatment gave superior adhesion. In wet adhesion testing, the aluminium surfaces pre-treated by a silane film maintained superior performance over all other pre- treatments. The highest loss of adhesion was shown by phosphate pre-treatment. Silane coatings are easy to apply, they have good barrier properties, are environmentally friendly, and they are a good substitute for the efficient, but toxic chromate metal pre-treatments. The paper describes a comprehensive testing procedure involving: measurement of adhesion on differently pre-treated aluminium panels by two methods, direct pull-off procedures and determination of the NMPRT (N-methyl-2- pyrrolidone retention time), and electrochemical impedance spectroscopy. It was also found that phosphate pre-treatment formed stronger adhesive bonds with aluminium, but the system is not stable in a corrosive environment. Article entitled “The Influence of Aluminium Surface Pre-treatment on the Corrosion Stability and Adhesion of Powder Polyester Coating” by researchers at University of Belgrade, published in Progress In Organic Coatings, Dec 2010, 69 (I4), 316-325 INDUSTRY NEWS Pigment manufacturer Benda-Lutz celebrates 100-year anniversary Austrian company Benda-Lutz Werke GmbH celebrated its 100- year anniversary in 2010. The internationally active company manufactures pigments for coatings, printing inks and plastics, and specialises in the manufacture of metal powders, metal pastes and metal pigments as well as the finishing of powder coatings. Benda-Lutz operates subsidiaries in the US, Russia and Poland. Farbe und Lack, Nov 2010, 116 (11), 14 (in German) SmartSilver introduction IFS Coatings will use NanoHorizons’ SmartSilver anti- microbial additives for its range of antimicrobial powder coatings. IFS and NanoHorizons worked together to ensure that IFS Powder Coatings with SmartSilver will deliver durable and long lasting anti-microbial benefits. IFS Powder Coatings with SmartSilver are claimed to offer more than three times the QUV performance than that of rival technologies. PPCJ, Polymers, Paint, Colour Journal, Oct 2010, 200 (4553), 36

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Page 1: Pigment manufacturer Benda-Lutz celebrates 100-year anniversary

2 JANUARY 2011

F O C U S O N P O W D E R C O A T I N G S

radiation curable powder coatings.The market potential for theseproducts is the only major growtharea. They are proving their valuein many new marketopportunities. A kick-start is allthat is needed to firmly establishthem.

The leading powder coatingsproducers continue to expandtheir production capacities in themain global regions whereexpansion is still progressive.Akzo Nobel has targetedexpansion in China, while Jotunis targeting specific marketopportunities. Its latest launch isa furniture powder coatings range,Era-Coat MDF. These productsinclude an engineered primer andtopcoat, available in 20 coloursand textures. Formulated to givea seamless coated surface,coating both back and front of theMDF, the products are claimed tooffer scratch resistance, water,stain and impact resistance. Jotunis certainly backing powdercoatings as an essential item inits wide range of conventionaldecorative and functionalcoatings.

In Europe and North Americathe situation is still relatively staticalthough demand is animprovement upon the 2009sales. A recent industry reportpredicted a growth rate of about2.7% between 2009 and 2012although there is more interestbeing shown in the architecturalmarket, which has always beensmall in relation to the significantrole of these powder coatings inother global markets. There islittle doubt that the major criticismof powder coatings is their highcuring temperatures. An inevitabledecline of thermosetting powdercoatings will occur in the troubledindustrial climate of the US, withthe development of wet-on-wetprocesses, which offer increasedefficiency and cost reduction.While they still retain theadvantage of being the only trulygreen technology, there is nofuture for thermosetting powdercoatings. The one bright spot isthe steady growth in the US

market of UV curable powdercoatings. This new technologywas first commercialized in theUS and I predict that the positiveadvantages shown by thesesystems will revitalize the USpowder coatings market in thenear future, leaving other globalmarkets a challenge to their ownintegrity.

Sid Harris

TECHNICALImproving adhesion of powdercoatings to aluminium substrates

The most important properties ofa protective coating are: anti-corrosive action and adhesion tothe substrate. The usual methodemployed to improve adhesion onmetal substrates is surface pre-treatment prior to application ofthe coating. A team ofresearchers at the University ofBelgrade has examined theadhesion of polyester powders ondifferently pre-treated aluminiumsurfaces by anodizing, with andwithout sealing, by phosphatingand by silane film deposition.They measured dry and wetadhesion and it was shown thatunder dry conditions all polyesterpowder coatings showed verygood adhesion but the silanetreatment gave superior adhesion.In wet adhesion testing, thealuminium surfaces pre-treated bya silane film maintained superiorperformance over all other pre-treatments. The highest loss ofadhesion was shown byphosphate pre-treatment. Silanecoatings are easy to apply, theyhave good barrier properties, areenvironmentally friendly, and theyare a good substitute for theefficient, but toxic chromate metalpre-treatments.

The paper describes acomprehensive testing procedureinvolving: measurement ofadhesion on differently pre-treatedaluminium panels by twomethods, direct pull-off

procedures and determination ofthe NMPRT (N-methyl-2-pyrrolidone retention time), andelectrochemical impedancespectroscopy. It was also foundthat phosphate pre-treatmentformed stronger adhesive bondswith aluminium, but the system isnot stable in a corrosiveenvironment.

Article entitled “The Influence of AluminiumSurface Pre-treatment on the CorrosionStability and Adhesion of Powder PolyesterCoating” by researchers at University ofBelgrade, published in Progress In OrganicCoatings, Dec 2010, 69 (I4), 316-325

INDUSTRYNEWS

Pigment manufacturer Benda-Lutzcelebrates 100-year anniversary

Austrian company Benda-LutzWerke GmbH celebrated its 100-year anniversary in 2010. Theinternationally active companymanufactures pigments forcoatings, printing inks andplastics, and specialises in themanufacture of metal powders,metal pastes and metal pigmentsas well as the finishing of powdercoatings. Benda-Lutz operatessubsidiaries in the US, Russiaand Poland.

Farbe und Lack, Nov 2010, 116 (11), 14 (inGerman)

SmartSilver introduction

IFS Coatings will useNanoHorizons’ SmartSilver anti-microbial additives for its rangeof antimicrobial powder coatings.IFS and NanoHorizons workedtogether to ensure that IFSPowder Coatings withSmartSilver will deliver durableand long lasting anti-microbialbenefits. IFS Powder Coatingswith SmartSilver are claimed tooffer more than three times theQUV performance than that ofrival technologies.

PPCJ, Polymers, Paint, Colour Journal, Oct2010, 200 (4553), 36