Coating applications, thermosetting

Hansa Yellows. Hansa yellows are quite opaque when compared to the other organic family yellows. Hansa yellows as a family are known as potentially significant bleeders. This limits their use in most thermoplastics. Hansa yellows do have utility in some thermoset plastics. Care should be exercised when contemplating the use of Hansa yellow s in polymers. Hansa yellow s popularity and great usage is in coating applications. 

This approach no doubt will find a place in future industrial coating applications. It is ironic that these experimental powder coatings mimic the oldest thermosetting finish—porcelain enamels. 

While most of the subjects discussed up to this point involve injection molding or extrusion applications, there are a considerable number of other applications where polymer blend technology is and will be employed including adhesives, sealants, coatings, and thermosetting systems, polymeric membranes, and water-based polymers. 

This book focuses on bio-based plastics. It emphasizes materials that are presently in use or that show a significant potential for future applications. It presents a broad, up-to-date but concise overview of basic and applied aspects of bioplastics. The main focus is on thermoplastic polymers for material use. Elastomers, thermosets and coating applications, Uke, for example, natural rubber or alkyd resins, will be covered in other volumes of the series. 

DR pigments are used in paint applications where their properties are required, such as high-temperature paints and coil-coating paint systems based on fluoropoly-mers, silicone-polyester, and plastisol. The NiSbTi and CrSbTi DR pigments are used in trade sale paints including acrylic house paints, general industrial paints in polyester systems, and fleet colors in thermoset acrylic, thermoplastic acrylic, and polyurethane systems. They are also used in polyester-based powder coating applications. 

Continuing development in the field of acrylic polymers for surface coating applications during the SO s led to the commercialisation of heat curing, thermosetting acrylic (TSA) resins for use in high quality industrial coating systems for both interior and exterior applications. 

A wide variety of other specialty monomers are also used to provide specialized performance properties for coating applications. For example, amine functional monomers can be used to improve adhesion to aged alkyd substrates. Specialized monomers can also be used to improve exterior durability, for example VEOVA (vinyl ester of vesatic acid) monomers can improve the hydrolysis resistance of vinyl acetate polymers, and n-butyl methacrylate can be used to enhance the durabiHty of BA-MMA acrylics. Polymer hydrophobicity can be fine tuned by varying the levels of hydrophobic and hydrophilic monomers in the composition and styrene or ethyl hexyl acrylate are used to increase film hydrophobicity and reduce water permeability in BA-MMA systems. Specialty monomers are also used to provide specific chemical functionality to polymer compositions. For example, hydroxyethyl methacrylate can be used to provide hydroxyl functionality to acrylic resins, allowing these polymers to be used in cross-linkable thermoset coatings which cure via melamine chemistry. While specialty monomers are used at relatively low levels in polymer compositions, they frequently provide the performance features needed for the successful application of emulsion polymers in many coating areas. 

Note Thermosets are also used in non-fiber-reinforced applications such as gel coats and cast polymer. 

Development and Application of Network Structure Models to Optimization of Bake Conditions for Thermoset Coatings... 

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