The new issue 1/2019 of PU Magazine International has been published!
In this new issue you can read about past fairs and conferences such as imm Cologne, one of the most important furnishing fairs in the world, and the Desma house fair in Achim near Bremen, the meeting place for the global shoe industry. In addition, find out about the upcoming Foam Expo North America 2019, which will take place at the end of March 2019 in Novi, MI, USA.
The current issue also provides information on the global automotive market and an assessment of the North American PU market by leading industry experts.
We also spoke with Sun Yu and Steve Hulme of Maysta Chemical about expanding the company's international presence and product line offering.
Featured technical articles are:
- New caprolactam-blocked prepolymers for 1K and 2K polyurethane reaction systems
(G. Brereton, Z. Zhu, G. King, P. R. Ware: Lanxess Urethane Systems business unit, Cologne, Germany)
Using Low Free (LF) isocyanate technology, urethane prepolymers that are blocked with ε-caprolactam (CAP) were developed. When mixed with diamine chain extenders, they produce ready-to-use one-component reaction systems that can be stored at room temperature for up to 180 days and only react at high temperatures. Alternatively, the processor can formulate application-specific two-component systems with freely selected diamine curing agents. The 1K and 2K systems produce PU elastomers, coatings, adhesives and sealants with a material performance not previously achieved with diol hardeners.
- Low GWP blowing agents: reduced footprint through better performance of Opteon 1100
(S. Roy, E. Wysong: Chemours Company, Wilmington, DE, USA)
The polyurethane foam industry is fast adopting foam blowing agents (BAs) with low global warming potential (GWP) to replace high GWP alternatives. However, a low GWP is not the only criterion for a BA to minimize climate change potential; the thermal performance and energy savings during use phase of the insulation play an important part as well. In this update of a previous work done by the same authors, historic BAs with high GWP, e.g., HFC-245fa and its blend, were evaluated along with a low-GWP BA alternative from Chemours, Opteon 1100. A holistic approach using life cycle methodology was used to calculate climate change potential (CCP) across the entire supply chain, including raw material and spray foam production, spray foam installation, energy savings during product use, and end-of life (EOL) disposal. A residential wall application was evaluated under various climatic conditions. The updated functional unit in this study was 1 m2 of insulation with R value of 5.68 h ft2 °F/Btu (1 K·m2/W), in line with product category rule specified for spray polyurethane foam insulation. The LCA work showed that BA thermal performance becomes critical to minimizing overall climate change potential. Through this work, an optimum foam formulation was identified that resulted in highest energy savings and lowest life cycle climate change potential.
- Additives for improved efficiency of polyisocyanurate foams
(J. Diendorf, M. Glos: Evonik Nutrition & Care GmbH, J. Grimminger: Evonik Specialty Chemicals GmbH, J. Tobias: Evonik Corporation)
The growing global awareness of climate change and the need for energy conservation are driving an ever-increasing interest in rigid polyurethane foam. Polyisocyanurate thermal insulation boards are widely used in construction and insulation applications, due to their superior insulating properties, resistance to fire, outstanding mechanical properties and high resistance to microbes and mold. Typical applications include commercial roofs, commercial and residential walls and even aesthetics, architectural applications. Due to the high index of polyisocyanurate foams, trimerization promoting catalysts are employed. The promotion of the trimerization reaction in polyisocyanurate foams gives a high crosslinking density resulting in improved mechanical properties, and also promoting fire resistance. This paper presents new, differentiated, octoate-free trimer catalyst technologies that improve reaction kinetics, cell structure, adhesion, insulating performance and mechanical properties. Evonik has developed a family of trimerization additives, to ameliorate these properties, rather than exacerbating them. These benefits will allow producers to maintain their competitive edge, while providing a quality product to the market place, thereby improving the efficiency of this widely-used building material, and contributing to a more environmentally-responsible and sustainable society.
- Use of Converge polyols in CASE applications: challenges and future direction
(J. Chattopadhyay, S. Allen, C. Fordice, K. Jaskula: Aramco Performance Materials, Rochester, NY, USA, C. Shen: Aramco Performance Materials, Houston, TX, USA)
Development of products with improved sustainability is a major initiative in the polyurethane industry. Unfortunately, many of the products currently marketed as sustainable require a substantial tradeoff between performance and cost. Hence, newly developed carbon dioxide (CO2) based poly(propylene carbonate) (PPC) polyols (Converge) have garnered significant attention and excitement from major US and global polyurethane manufacturers as well as fabricators and end-users looking for strong product performance with improved sustainability features. Using waste CO2 as a main feedstock combined with its unique chemical backbone differentiates Saudi Aramco’s polyols from conventional polyols. This makes them an attractive option to enhance supply chains focused on improved performance and reduced carbon footprint. This paper demonstrates the performance attributes and applicability of Converge polyols in coatings, adhesives, sealants and elastomers (CASE) applications. Furthermore, the low carbon footprint of the products will be discussed across these applications. Additionally, compatibility of Converge polyols will be discussed with currently marketed polyether and polyester based polyols.
Further information about the new issue at https://www.gupta-verlag.com/magazines/pu-magazine-international/01-2019.