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1CO2 UTILIZATION DREAMPOLYMERS 1.9 Dream Polymers BMBF Project FKZ 033RC1104 Project Coordinator: Dr. Christoph Gürtler, Covestro Project Partner: Bayer Technology Services, RWTH Aachen, Leibniz-Institut für Katalyse e.V., Fraunhofer ITC 1.9.1 Introduction The ‘Dream Polymers’ project examined a wholly new approach to syn- thesising polyols that has the potential to produce polyols using only al- ternative raw materials. The idea is to react formaldehyde and CO2 to form polyols. The low molecular weight polyols are processed to produce polyu- rethanes, while the high molecular weight compounds are used directly as polyoxymethylene (POM) thermoplastics. This creates an additional poss- ible use of polyols in the form of a new marketable polymer. If the proposed new synthetic pathway is implemented successfully, it would generate CO2 emissions savings of about 1.6 million metric tons of CO2 per year. Pre-project status and background: Use of CO2 in polyurethanes Polyurethanes (PUs) are among the most important products manufactured by the chemical industry. Manufacturers included Bayer, BASF, DOW and Huntsman. The size of the global market is currently around 12 million met- ric tons per year, with polyurethanes being produced from isocyanates and polyols. The use of CO2 as a chemical building block has not so far played a part in the synthesis of the PUs currently available commercially. Use of CO2 in polyoxymethylene (POM) Polyoxymethylene (POM) is an engineering plastic. It known commercially by a variety of names such as Delrin (Dupont), Ultraform (BASF) or Celcon (Ticona). Its most important properties are: (I) high strength and high rigid- ity, (II) good resilience, (III) excellent chemical resistance, (IV) dimensional stability, (V) low water uptake, (VI) low creep and (VII) outstanding dynamic friction properties. POM can generally be machined on all equipment used to process thermoplastics. The global market in POM totals around 0.9 mil- lion metric tons per year. So far, CO2 has not been used as a chemical feed- stock in the production of POM. Polymethylene carbonate polyols The first fundamental results relating to polymethylene carbonate polyols were described in two publications in the scientific literature.1,2 The authors 74PDF Image | Chemical Processes and Use of CO2
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