European Coatings Library / Silicone Resins and their Combinations

ForewordBecause of their molecular structure, silicone resins and silicone combination resins are used in numerous industrial applications, particularly as binders, for formulating coatings. The linking of silicon and oxygen atoms to form a stable basic framework, in which the free valencies of the silicon are saturated by hydrocarbon groups, results in outstanding properties which cannot be achieved with other products. The many possible combinations of the silicone building blocks are reflected in the impressive diversity of silicone chemistry and the resultant products. The present book (2nd edition) is intended to provide a concentrated overview of the chemistry and technology of silicone resins and their use from an industrial viewpoint.It aims to report on current developments in the field of silicones for coatings and gives those approaching the subject an overview of the most important areas of application.Since publication of the 1st edition of this book almost ten years ago, some areas of application have seen further technological developments and these have driven significant advances.For example, silicone combination resins are being increasingly used in anti-corrosion coatings to cope with extreme weather conditions and temperatures.Alkoxy-silyl functional urethane resins are used in high-tech coatings to increase scratch resistance.New types of acrylic dispersions in combination with functional polysiloxanes enable the formulation of "below-critical" emulsion coatings with similar properties to "above-critical" silicone resin coatings.These and further innovations are described in the 2nd edition of this book and reflect the current state of the art in this field.Since this field will continue to develop, I am pleased that I have been able to win my colleague Dr. Sascha Herrwerth to join me as co-author for this new edition.I would like to thank our colleagues Dr. Michael Ferenz, Dirk Hinzmann and Dr. Berendjan de Gans for numerous technical

1 Introduction 111.1 Organo-siloxanes and organo-polysiloxanes 111.2 Chlorosilanes - the building blocks for silicone resins 171.3 Manufacture of the resin intermediates 202 Silicone resins 232.1 Pure silicone resins 232.1.1 Methyl-silicone resins 262.1.2 Methyl/phenyl-silicone resins 282.2 Silicone combination resins/silicone resin hybrids 292.2.1 Silicone-modified polyester resins 312.2.2 Silicone-modified alkyd resins 312.2.3 Silicone-modified epoxy resins 342.2.4 Silicone-modified polyacrylate resins 382.3 Alkoxy-silyl modified resins and alkoxy-silyl modified isocyanate crosslinkers 392.4 Radiation-curable silicone resins 412.4.1 Acrylic-functional silicone resins 412.4.2 Epoxy-functional silicone resins 452.5 Room temperature vulcanizing silicone resins (RTV resins) 462.6 Waterborne silicone resins 483 Examples of applications of silicone resins 513.1 Silicone resins for heat resistant coatings and corrosion protection above 300 °C 513.2 Silicone-modified aromatic polyester resins for heat resistant coatings up to 250 °C for decorative coatings 563.3 Applications at normal temperatures 593.3.1 Silicone-modified aliphatic epoxy resin for versatile coating applications 593.3.2 Acrylic- and epoxy-functional silicone resins as UV-cured release coatings 653.4 Silicones and silicone resins in building conservation 693.4.1 External water repellency 693.4.2 Internal water repellency 753.4.3 Architectural coatings 773.4.4 Silicate emulsion coatings and renderings 783.4.5 Emulsion based coatings with silicate character (SIL coatings) 803.4.6 Siloxane architectural coatingswith strong water-beading effect 813.4.7 Silicone resin coatings and renderings 823.4.8 Below-critical PVC formulated exterior coatings 873.4.9 Photocatalytic architectural coatings 874 Outlook 915 Glossary 935.1 Façade protection theory according to Künzel 935.2 sd-value 935.3 w-value 955.4 Definitions of PVC and CPVC 976 Analysis of silicone polymers 996.1 NMR spectroscopy 996.2 IR spectroscopy