Demande de catalogue

N E W S LE T T E R F O R T H E C O AT I N G S A N D A D H E S I V E S I N D U ST RY

ISSUE 5_2011

Peter Warmbier Senior Vice President Business Unit Coatings Adhesives & Specialties Marketing EMEA/LATAM

Editorial

R A W M AT E R I A L S F O R S U S TA I N A B L E S O L U T I O N S

Concrete benefits ­ now and in the future
Sustainability is becoming a major driver in both society and in business and industry. Bayer MaterialScience is putting sustainability into practice by producing raw materials that give your products sustainable benefits.
Bayer's proven commitment Bayer believes sustainability is about achieving commercial success in a way that is compatible with protecting the environment and meeting the needs of society. And at Bayer sustainability has a long tradition with its first report on the environment and society published as early as 1976. Nowadays, Bayer partners leading organizations in promoting sustainability ­ as a founding member of the UN Global Compact, an organizational stakeholder in the Global Reporting Initiative (GRI) and a partner in the UN Environment Program (UNEP), for example. Key external rating agencies have acknowledged Bayer's sustainability efforts for years, e.g. through inclusion in the Dow Jones Sustainability Index since 1999 and the Carbon Disclosure Project since 2005 (as the only European company from the chemical and pharmaceuticals industry). Contributing to sustainable development Raw materials produced by Bayer MaterialScience help to further sustainable environmental and societal goals through more efficient use of energy, water and raw materials, reduced greenhouse gas (GHG) emissions, and better protection for workers and end users. Though accounting for less than 1% of the mass of a finished article, coatings contribute to its sustainability through performance-enhancing qualities, e.g. long-term corrosion protection and durability. Adhesives bond different substrates to create finished articles that make new applications possible, e.g. in the wind energy industry. Our raw materials are also found in products that reduce the loss of water through leakage by enabling more efficient pipe repairs. Waterborne, UV-curing and 100% solids raw materials help to reduce GHG emissions. Our use of biomaterials proves we have a responsible attitude to finite natural resources and our zero-VOC products reduce the health risk to end users. Sustainability drivers Innovations drive sustainability in the CAS Business Unit. The raw materials we produce make our customers' products more sustainable and durable ­ particularly in terms of GHG emissions, health protection and energy consumption. The focus of our development strategy is on

Welcome to the fifth issue of AdCoTec with its keynote theme of applications in the construction industry. Our main article highlights the much-discussed topic of sustainability, focusing in particular on the raw materials we produce that make our customers' products more sustainable and durable. As contractors place increasing importance on "green buildings", the construction industry is facing up to the issues of GHG emissions, energy consumption and health protection. At Bayer MaterialScience we are keen to engage in this dialog by showing how our products can enhance the sustainability profile of yours. In line with the sustainability theme, we also feature articles on bio-based raw materials, the cohesion and adhesion properties of silane-terminated polyurethanes, the EcoCommercial Building Program and, last but not least, the impact of the new regulations covering parquet coverings and adhesives. I hope you enjoy your read. Please don't hesitate to contact us for further information on any of the products mentioned. Yours sincerely,

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advanced product technologies that are safe and cost-efficient in their application and environmentally friendly in their use. Our raw materials for applications in the construction industry exemplify the sustainability benefits our customers enjoy: · Corrosion protection on steel constructions: Zero or low VOC coatings based on our polyaspartic raw materials are an ideal replacement for conventional solvent-borne polyurethane and epoxy coatings. These very high solids coatings based on Desmodur® N and Desmophen® NH polyaspartics cure fast at ambient temperatures, offer C4-C5 level corrosion protection and are also cost-efficient since only two layers need to be applied instead of the conventional three. Customers benefit from the processing time saved and reduced solvent emissions. · Adhesives and topcoats for wind-turbine blades: Polyurethane-based adhesives are used to bond the upper and lower shell of the blade, the surface of which is subsequently protected against abrasion and the weather by a low-emission coating. Topcoats or primers for the tower and blades of a wind turbine are based on our 2K very high solids aspartic esters marketed under the Desmodur® N and Desmophen® NH labels while coatings based on water-borne Bayhydrol® and Bayhydur® 2K polyurethane provide an excellent topcoat for the blades. All these coatings offer C4-C5 level corrosion protection for on- or offshore wind turbines and replace the conventional unsaturated polyesters used in gel coats and solvent-borne polyurethane topcoats. Customers benefit from the processing time saved, reduced solvent emissions and more durable coatings. · Sustainable floor coatings: Oxidative-drying, water-borne Bayhydrol® grades have proved their worth over many years as raw materials for parquet coatings. Polyurethanebased Desmophen® and Desmodur® floor coatings

are partially based on renewable raw materials. UV-curing coatings based on Desmolux® and Bayhydrol® UV products combine high processing speed and low to zero VOC formulations with low energy consumption in curing. Customers benefit from energy savings and reduced solvent emissions. · Adhesives for structural wood bonding: Who says that wind turbine masts have to be made of steel or concrete? A recently developed composite system made up of cross-laminated wooden panels is held together by a certified PU adhesive and coated on the outside with PVC sheeting. The raw material for the solvent-free, 100% solids PU adhesive is Desmodur® E, a 1K aromatic prepolymer that enables standard wood qualities, e.g. pine, to replace steel or concrete in high-tech constructions. Customers benefit from energy savings, lower manufacturing costs and easier shipment of wind turbine masts. Looking to the future In line with Bayer's commitment to sustainability, our CAS Business Unit is focusing its research and development on applications areas delivering sustainable benefits, low VOC technologies and advanced production technologies. In the field of bio-based feedstocks we have an established product portfolio of more than 20 products with over 20% renewables content. We have started feasibility studies with bio-based raw materials, including novel ones not commercially available up to now. We subject any bio-based product development to three key questions: Is it technically advantageous, is it economically viable and is it more sustainable in every respect? After all, each new product ­ like every other Bayer MaterialScience product ­ has to bring added value to our customers.

Wind turbine rotor blades ­ featuring raw materials from Bayer MaterialScience

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PRODUCT E MISSIONS

Tested products "suitable for indoor use"
This year, the legislation regulating VOC and SVOC emissions from indoor products was extended to cover parquet coatings and adhesives applied on site. Bayer Material Science has tested a number of its raw materials in formulations and can thus support customers in their efforts to achieve the required certification.
Indoor air quality Building products can be a significant source of indoor air pollution through VOC and SVOC emissions. Consequently, one of the six main requirements of the EU Construction Product Directive (89/106/EEC) covers hygiene, health, the environment and ­ as a recent addition ­ sustainability. This requirement relates to the emission of toxic gases, the presence of dangerous particles or gases in the air, the emission of dangerous radiation, and water or soil pollution or poisoning. New legislation In Germany, the Committee for Health-Related Evaluation of Building Products (AgBB) has laid down the criteria for testing and evaluating such emissions. The most recent extension of the relevant legislation to include parquet coatings and adhesives has caused considerable unrest among manufacturers of these products because it was introduced at relatively short notice. The practical consequence for these companies is that they are now required to have their products tested for AgBB conformity. Practical assistance Since Bayer MaterialScience has already tested a number of its raw materials in typical formulations for parquet and reaction resin floor coatings, we can now support manufacturers with more detailed information regarding AgBB conformity. The systems tested were UV-curing systems (both water-based Bayhydrol® UV and 100% solids Desmolux®) as well as aqueous 1K and 2K PU formulations (Bayhydrol® UH; Bayhydrol® A/Bayhydur®). However, it has to be said that although we obtained positive test results with our products, customers' tests need to be performed with their specific formulation and that the results depend not only on the specific coating formulation but also on the application conditions, i.e. film thickness, substrate or pre-conditioning time defined in the test. In view of the unsatisfactory situation that has arisen through the vagaries of measuring AgBB conformity it is to be hoped that uniform and more reproducible methods of measurement will be introduced in the EU before too long.

New emission regulations for parquet coatings and adhesives applied on site

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BIO-BASED PRODUCTS

Now for something completely different
In the past, renewable raw materials were the norm in the coatings industry. At present, synthetic resins are still commonplace. But in the future, renewables will again come to the fore as increasing importance is attached to carbon neutrality.
Climate change debate Renewable raw materials are nothing new. The first chemically manufactured binders for coatings were based on nitrocellulose and vegetable oils (e.g. alkyd resins and linseed oil binders) but required significant quantities of solvents in their processing. Over the years, such renewables were replaced by synthetic resins, e.g. polyesters, acrylates, epoxy resins or polyurethanes, because of their superior performance. But as the climate change debate has grown in intensity, the spotlight is once again on renewable, carbon-neutral raw materials for coatings and adhesives. Nevertheless, performance expectations are high. State-of-the-art binders with a high renewable raw material content should not only outperform conventional products but also be suitable for use as solvent-free or low-solvent high solids. Exemplary bio-based products · Desmophen® 1150: Renewable content (vegetable oil) >70%; in combination with Desmodur® VL ideally suited as a solvent-free primer for anti-corrosion coatings or highly resilient floor coatings · Bayhydrol® UH 2557 & UH 2593/1: Highmolecular, oxidative-drying polyurethane dispersions with high fatty-acid content in the binders; suitable for highly resilient indoor wood primers and clear coats; waterborne formulations with low co-solvent content; can be processed without using siccatives · Bayhydrol® UH XP 2592: Polyurethane dispersion with high vegetable fatty-acid content; oxidative-curing, solvent-free and suitable for high-quality waterborne primers and top coats on steel as well as for outdoor wood coatings New raw materials As the above examples prove, urethane chemistry allows extremely high-quality, biobased binders to be produced and processed in an environment-friendly way. Current developments in the renewables field show that it is not only possible to process existing raw materials from renewable sources, but also that new raw materials are becoming commercially available. Only time will tell how suitable these products are for manufacturing high-quality binders for coatings and adhesives. But one thing is certain: Bayer MaterialScience will continue to monitor the renewables market and test the performance potential and commercial viability of bio-based polyurethane products.

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S I L A N E - T E R M I N A T E D P O LY U R E T H A N E S

Cohesive and adhesive excellence
In recent years, silane-terminated polyurethanes have become increasingly attractive to manufacturers of sealants and adhesives thanks to a unique combination of excellent cohesive strength and good adhesive properties.
Unique combination of properties STPs uniquely combine the well-known advantages of polyurethanes, e.g. their versatility, with the benefits of silane crosslinking. Moreover, the performance of STPs is superior to neutrally curing silicones because STPs have a high cohesive strength, display good elastic properties and are easy to paint over. Furthermore, the ability of STPs to form bonds with the substrate means they display unique adhesion properties thanks to their specific silane chemistry. As a result, primer-less adhesion is possible on a wide range of substrates. Bubble-free curing The alternative crosslinking mechanism in STPs ­ the exclusive use of trifunctional silyl end groups ­ offers a number of benefits over the conventional moisture-cure polyurethane crosslinking. Every STP prepolymer has at least six potential crosslinking sites that react with moisture and as no carbon dioxide is released, bubble-free curing is possible at any film thickness. Varied range of applications Since the properties of STPs can be widely varied through suitable formulation, these raw materials can be used in virtually any field of application for elastic polyurethanes, e.g. as parquet adhesives, sealants for the construction industry, roofing membranes or assembly adhesives. Basis for labeling-free adhesives According to the Technical Guideline for the Handling of Hazardous Materials in Germany, for example, STPs are now permitted as fully-fledged replacements for solvent-based parquet adhesives. Solvent-free STP adhesives can therefore improve workplace hygiene and cause fewer GHG emissions. Bayer MaterialScience markets its STPs under the Desmoseal® S label, which comprises the following products: Viscosity [Pa*s] Desmoseal® S XP 2774 Desmoseal® S XP 2636 Desmoseal® S XP 2458 Desmoseal® S XP 2749 55 40 40 5 Molecular weight Very high High Medium Low

The many technical advantages of STPs have already convinced users in a wide variety of applications ­ and Bayer MaterialScience sees further development potential in the fields of coatings and structural adhesives.

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ECOCOMME RCIAL BUI LDI NG PROGRAM

Advancing sustainable construction
30% of all global greenhouse gas emissions are caused by energy consumption in buildings. Improving their energy performance through sustainable modernization and construction of new green buildings is crucial in combating climate change.
EcoCommercial Building Program Bayer MaterialScience is a Global Sponsor of the EcoCommercial Building Program, a network of experts providing solutions for the energy-efficient, environmentally friendly and cost-effective construction of commercial and public buildings. The Program offers investors and key players in the construction industry new ideas and innovative solutions to significantly improve the cost effectiveness and sustainability of buildings. The potential for improvement is huge. As Peter Vanacker from the Bayer MaterialScience Executive Committee points out, buildings "account for nearly 40% of global energy consumption. The good news is that it's possible to reduce primary building energy use by up to 90% using existing technologies". Bayer utilizes the potential of the EcoCommercial Building Program for its own investments, as the following examples of building projects supported by the Program prove: Emissions-neutral building in India Bayer MaterialScience's new Innovation Center in Greater Noida near New Delhi, India, obtains all its electric power from a photovoltaic plant and consumes only about half the energy of comparable buildings in the region. Through the use of polyurethane building materials and state-of-the-art building technology Bayer's first emission-neutral building in Asia proves that sustainable construction principles can even be applied in tropical climates. Children's daycare center in Germany A children's daycare center in Monheim near Leverkusen, Germany, achieves an emission-neutral energy balance over the course of a year thanks to the climateand energy-optimized building concept, highly efficient thermal insulation and the use of renewable energy sources. The German Economics Ministry recognized this achievement with its prestigious Energy-Optimized Building Award. Administrative building in Belgium Bayer's new administrative building in Diegem, Belgium, consumes 40% less energy than conventional office buildings do today. Polyurethane insulation cuts CO2 emissions by around 300 metric tons a year, the equivalent of 110,000 liters of heating oil, and a solvent-free polyurethane floor coating ensures a healthy indoor environment. Diegem is another step in the right direction ­ towards lower emissions. Find out more about how products such as sandwich panels, flooring systems, rigid foam thermal insulation boards or PV elements make sustainable constructions possible: www.ecocommercialbuilding.com

Innovation Center, Greater Noida, India

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Publisher: Bayer MaterialScience AG Business Unit Coatings, Adhesives & Specialties 51368 Leverkusen cas@bayermaterialscience.com www.bayercoatings.com

Disclaimer: This information and our technical advice ­ whether verbal, in writing or by way of trials ­ are given in good faith but without warranty, and this also applies where proprietary rights of third parties are involved. Our advice does not release you from the obligation to verify the information currently provided ­ especially that contained in our safety data and technical information sheets ­ and to test our products as to their suitability for the intended processes and uses. The application, use and processing of our products and the products manufactured by you on the basis of our technical advice are beyond our control and, therefore, entirely your own responsibility. Our products are sold in accordance with the current version of our General Conditions of Sale and Delivery.

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