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European Coatings Conference
Extra
Pre-Conference Tutorial
05 November 2008
Berlin, Germany
Main conference
"Parquet Coatings V"
06/07 November 2008
Berlin, Germany
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 Welcome
At a Glance
Tutorial
Abstracts
Delegates Section
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| Events > European Coatings Conferences > Parquet Coatings V > Abstracts |
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MAIN CONFERENCE: Abstracts
| THURSDAY, 6 November 2008 |
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Future lacquer systems - an overview of European Parquet Manufactures requests and market needs
Anders Jönsson, Federation of the European Parquet Industry, Belgium
UV curing is today the main method for lacquered parquet flooring. New built lines are very much alike but each parquet manufacture has its own special requests. What all producers have in common and are expecting from the supplier are
- Complete solutions
- High level of technical support and knowledge
- Stabile and flexible systems
- High level of innovations
- And of course high quality and good price
Multi layer flooring is a commodity product with low level of diversification. The surface coating is one component which can give the manufacturer can get unique selling points and adds value to the product.
- Technical properties as the end consumer is asking for are e.g. high wear resistance, improved fire properties, good slip resistance and resistance to discoloration due to UV-light.
- Visual properties like low gloss systems have been popular in the Nordics for many years, to day the market share growing also in other markets.
- Environmental friendly solutions are more and more requested and new standards will have a strong impact on future developments.
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| SESSION I: Radiation curing |
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State of the art of radiation curable coatings for high performance pre-finished parquet
Dr. Xavier Deruyttere, Cytec, Belgium
Since more than 20 years, parquet coatings have largely adopted radiation curing technology, with all of its benefits: high speed of curing, low space requirements, excellent coating performance, ease of application, and above all, it is a solvent free technology.
Over the years, the product porfolio for parquet finishing has grown to a broad range of products, 100% UV as well as waterbased UV; with primers showing excellent "anfeuerung", high abrasion resistance sealers and topcoats with superior scratch resistance. All of this, also including new phosphorous modified binders, developed for upcoming legislation on flame retardancy, are covered in this presentation.
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Polycarbonates in UV curable parquet lacquers
Henrik Bernquist, Perstorp, Sweden
A new class of versatile aliphatic polycarbonate macrodiols suitable for parquet flooring has been developed. In this paper these polycarbonates are evaluated and compared to other types of conventional macrodiols as aliphatic urethane acrylate oligomers. This new class of polycarbonate macrodiols includes homo- and co-polymers derived from 2,2-dialkyl-1,3-propanediols. From these aliphatic urethane acrylates UV curable formulations were prepared and tested according to several different coating evaluation methods such as hardness, flexibility, chemical, abrasion and outdoor resistance. These newly developed polycarbonates all show a high hardness, very good adhesion, excellent water, solvent, acid and base resistance and very good weathering resistance.
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New water borne radiation curing technology for parquet coatings
Dirk Mestach, Nuplex, The Netherlands
New UV-curing waterborne binders have been developed for use in parquet-coatings. The first binder system has an acrylic backbone and possesses a dual-crosslinking system. The second binder system is a solvent free UV-curing polyurethane dispersion. In this paper the chemistry behind these two bindersystems is discussed and it is demonstrated how high performance parquet coating systems can be formulated.
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Radical innovations - novel resins for UV-parquet coatings
M. Biehler, BASF, Germany
The natural beauty and timeless elegance of wooden floors give them a special place in modern interior design. To meet the high performance of factory prefinished parquet, the surface of the wood is today coated with a high performance UV-coating.
Essential requirements for the parquet finishes are an excellent adhesion to the substrate, a good abrasion resistance in consideration of the test method and a high scratch resistance.
This paper describes in the first part the latest developments in adhesion primers, performance resins for abrasion resistance and improvements of the scratch resistance.
Besides these hard facts more and more soft facts are important for product differentiation.
The haptic and the optic of the surface get a higher importance for the buying decision of consumers. A smooth surface and a very low gloss are trendy. With conventional matting agents it is a great challenge. The authors show that matting with Excimer bulbs could be a promising option.
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| SESSION II: Nanotechnology |
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Clay-based nanocomposites coatings for wood flooring
Veronic Landry, Université Laval Quevec, Canada
Radiation curable coatings are since many years and still presently the standard in the wood flooring industry. In the thermoplastics area, nanocomposites studies have shown that mechanical and thermal properties can be improved by the addition of clay nanoparticles. Few papers were published for thermosetting systems but it seems that clay particles could play the same role than for thermoplastics systems.
In this study, a non reactive treated montmorillonite was added by four different methods (high speed mixing, ball milling, bead milling and three roll milling) in a typical acrylate formulation for wood flooring. These coatings were cured by UV light. Small angle x-ray diffraction experiments (SAXS) were first performed but it was not clear if the clay was exfoliated of not. In order to confirm the quality of the dispersion, microscopic analysis was realized. Transmission Electron Microscopy (TEM) and Atomic Force Microscopy (AFM) were both performed on the different samples.
In order to assess the effect of clay dispersion on the curing efficiency, real-time infrared spectroscopy (RT-FTIR) and photo-calorimetry (photo-DSC) experiments were performed. These techniques help us to investigate the effects of clay loading and clay dispersion on the curing rate and conversion of the acrylate functional group.
Mechanical (hardness, adhesion, scratch resistance, wear resistance, direct and reverse impact resistance) properties were evaluated. Optical properties (color, gloss, haze and optical clarity) were also assessed. An analysis of variance (ANOVA) was performed in order to determine if clay loading and clay dispersion affect the mechanical and optical properties. This study reveals that mechanical properties of UV acrylate coatings can be improved by the addition of a non-reactive organo-modified clay. It was also found that the addition of a small amount of clay leads to the conservation of good optical properties.
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A new generation of binder materials
Stefan Sepeur, Nano-X, Germany
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Parquet coatings: comparative observations - state of the art - future aspects
Dr. Ingrid Heußen, Ercros Deutschland GmbH, Germany
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Small amounts - big influence. Increasing properties with additives
Klaus Schulte, BYK, Germany
In the past additives were used in coatings only as problem solvers. For defects like foam, craters, flocculation of pigments additives are always needed. Today additives are gaining more and more importance to provide special surface properties. New innovative production technologies combined with a wide range of surface modifications is associated with unique product properties and almost unlimited opportunities for new applications. Additives can be a crucial factor for the success of the coating in the market. The advantageous use of new additives in a water-borne and solvent-free parquet lacquer will be explained in more detail. Special attention will be given in this paper to new developments in reference to scratch resistant coatings and improved adhesion on wood and inter coat adhesion.
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| SESSION III: Raw Materials |
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Organic-inorganic hybrid coatings for wooden flooring - targeting the challenge between haptic and mechanical performance
Dr. Rainer Schöftner, Profactor GmbH, Austria
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Developing polyurethane coatings beyond 2010 VOC directives
Marc Roelands, DSM NeoResins+, The Netherlands
Despite the fact that implementation of re-classification of NMP in the European Union is only to be enforced in the course of 2009, it can be concluded that processing routes of NMP free Polyurethanes and Urethane-Acrylic dispersions are nowadays common practise. Next to that, it seems that the majority of the parquet lacquers have already been reformulated, or are in a well advanced stage, to NMP compliant coatings, which additionally meet prescribed 2010 EU VOC directives.
However, it seems that various regional, national legislations and directives are aiming to put even more stringent demands on parquet lacquer developments in the near future.
New developments, in both polyurethanes and urethane-acrylics area, are discussed to enable lacquer preparations which can fulfill (near) zero VOC applications, resulting in coatings which minimize emissions of any volatile organic ingredients. All without compromising on the high performance standards as set by the parquet coating industry.
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Improving properties by increasing functionality - new water dispersible polyisocyanates
Christoph Irle, Bayer MaterialScience AG, Germany
Since many years waterborne 2K polyurethane systems have been use for site applied wood floor coatings. Major advantage of this generation of environmentally friendly coatings is the synergy of lowest smell and emissions with highest coatings performance.
In order to formulate robust 2K coatings that can be applied under a broad variety of ambient conditions, special care has to be taken of the structural parameters of the polyisocyanate used to crosslink the site applied coating. The paper discusses the influence of chemical structure of the polyisocyanate on performance parameters such as robustness, durability and ease of application. A rather high importance can be seen in the average functionality of the polyisocyanate: Using high-functional polyisocyanates yields both highly resistant and robust coatings.
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