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Køge, Denmark

Ilyushin V.V.,Ukrainian Academy of Sciences | Ilyushin V.V.,U.S. National Institute of Standards and Technology | Cloessner E.A.,College of Charleston | Chou Y.-C.,University of Taipei | And 3 more authors.
Journal of Chemical Physics

We present here the first experimental and theoretical study of the microwave spectrum of 5-methyltropolone, which can be visualized as a seven-membered "aromatic" carbon ring with a five-membered hydrogen-bonded cyclic structure at the top and a methyl group at the bottom. The molecule is known from earlier studies in the literature to exhibit two large-amplitude motions, an intramolecular hydrogen transfer and a methyl torsion. The former motion is particularly interesting because transfer of the hydrogen atom from the hydroxyl to the carbonyl group induces a tautomerization in the molecule, which then triggers a 60° internal rotation of the methyl group. Measurements were carried out by Fourier-transform microwave spectroscopy in the 8-24 GHz frequency range. Theoretical analysis was carried out using a tunneling-rotational Hamiltonian based on a G 12 m extended-group-theory formalism. Our global fit of 1015 transitions to 20 molecular parameters gave a root-mean-square deviation of 1.5 kHz. The tunneling splitting of the two J=0 levels arising from a hypothetical pure hydrogen-transfer motion is calculated to be 1310 MHz. The tunneling splitting of the two J=0 levels arising from a hypothetical pure methyl top internal-rotation motion is calculated to be 885 MHz. We have also carried out ab initio calculations, which support the structural parameters determined from our spectroscopic analysis and give estimates of the barriers to the two large-amplitude motions. © 2010 American Institute of Physics. Source

Heitzman S.,Sun Chemical
Society of Plastics Engineers - Color and Appearance Division Regional Technical Conference: Color and Appearance 2010, CAD RETEC 2010

The plastics color concentrate business has matured. Industry marketing reports state that there is overcapacity. The overcapacity and the recent economic downturn have accelerated the commoditization of pigments and masterbatch. A strategy to rely on doing things the same way, with the same pigments and raw materials, at a lower cost is not sustainable. This drives the growing importance of innovation. This paper will discuss some new pigment chemistries. They are innovative! They are not the same products, counteroffers to ones you are using now provided at a lower cost. They have better properties. They have better value in use. They provide the ability to cover more color space. They provide a competitive edge and sustainability. The pigments are yet to be given CI numbers and names. They are derived from the quinacridone family. A new quinacridone orange for Nylon will be reviewed. A new quinacridone violet and magenta for general plastics use will be presented. Color gamut and general performance data to include light fastness and heat stability will be provided for these innovative products. Source

DeBartolo T.,Liquid Ink Technologies | Felsberg J.,Sun Chemical

When done correctly, color management is like a non blemished apple. Nobody wants to buy an apple that is bruised and dented. The same can be said when a brand's colors do not translate properly on its packaging. Approximately 60 percent of shoppers make purchasing decisions based on color, and color alone can increase brand recognition by 80 percent to 90 percent. © 2015, Flexographic Technical Association. All rights reserved. Source

Jo Stephenson, Sun Chemical's marketing director for Packaging takes a look at the key factors that will drive the packaging industry. Over-packaging seems to be the trend for 2010 for convenience, protection, enhanced shelf-life, aesthetics and information that packaging provides. More interactive and smart packaging, such as the use of 2- dimensional bar codes (QR codes) simply read from the smart phone would be used. With consumers becoming increasingly aware of the green agenda and their personal carbon footprint, the spotlight is turning ever more to packaging. It is this awareness which will drive consumer preferences and ultimately brand owner strategies. Sun Chemical places the utmost importance on setting the standard for good practices in the packaging print industry. Print quality is still the key challenge in digital packaging printing, but labels have provided an entry point into the packaging arena and have huge growth potential. The market demands shorter runs, higher quality and wider-format printing, and labels are where the supply can meet the demand. Source

Anthony Bean suggests that the use of a good packaging design and manufacturing practices is key to reducing the risk of unwanted migration of food packaging components, such as inks. Packaging which is intended to come in contact with food need to meet the requirements of EU Regulations (EC) No 1935/2004 in Europe. Swiss Regulatory Authorities have also introduced an 'Ordinance', which specifically outlines lists of raw materials that can be used in food packaging inks. Each listed substance needs to have a specific migration limit (SML) against which the downstream stakeholders are expected to assure compliance. The ordinance has significant impact throughout Europe and other regions despite being implemented to regulate the use of food packaging inks within Switzerland. The German authorities have also declared their intention to implement their own National Ordinance on inks for food packaging. Source

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