Overview of Coating Formulations

Decorative and protective coatings consist of three main components  

In this chapter, we will focus on coatings utilizing emulsion polymer binders, and consequently, water wiU be the carrier liquid. These types of coatings are also commonly referred to as latex paints, presumably in reference to the similarities in appearance between the emulsion polymer binders and unprocessed natural rubber. 

---

This section presents a brief overview of some of the additives found in modem anticorrosion coatings. The field of coating composition is too complex to be covered in any depth in the following sections and, in any case, numerous texts devoted to the science — or art — of coating formulation already exist. 

Ti02-mica pigments are used in all color formulations of conventional pigments where brilliance and luster are required in addition to color, i.e., in plastics, coatings, printing, and cosmetics. Table 5.15 contains a comparative overview of Ti02-mica, basic lead carbonate, bismuth oxychloride, and natural fish silver pigments. Some further physical data are summarized in Table 5.16. 

This paper provides an overview of water-borne coatings from a practical formulating point of view, and sheds light on how to achieve specific properties in water systems. It deals first with the question of differentiating between the types of water-homes, then looks at resin choices, facets of formulation, and where to expect new technologies. 

The superprimer formulation is usually based on an ionic or non-ionic aqueous resin dispersion. The solid content of the water-borne resin is often around 55wt% and it may contain small amounts of organic solvents. Typical resins used in the primers are epoxies, acrylates and polyurethanes. The minor binder is incorporated in order to improve a particular coating property such as cold formability. Table 1 gives an overview of the family of superprimers based on different resin-cross-linker-silane-pigment combinations invented and investigated in our laboratory [7-11]. 

This section is intended to aid the technical person who must formulate an epoxy adhesive, coating, or sealer to meet specific performance requirements. It also will provide an overview of important new raw materials. The treatment will be substantive but not exhaustive. 

It must be noted, however, that efforts have been spent by several research groups with the aim of combining the favourable features of monolithic catalysts operated under autothermal conditions (thus favouring the onset in the gas-phase volumes of selective oxidation paths of the alkane fuel), with the development of intrinsically active and selective formulations able to contribute directly or indirectly to the selective production of olefins. A specific mention is deserved by rare earth oxides-based catalysts wherein contributions of the catalyst surface to the formation of ethyl species were reported. " Interestingly, through a detailed comparison of the observed performances of Pt-based and LaMnOs-based monoliths in ethane ODH experiments, Donsi et observed that the use of the perovskite-coated monolith yielded an improvement in ethylene yield. An overview of their results is reported in Fig. 28.6. 

An overview is presented on the merits of polyurethane dispersions in waterborne paint formulations. In addition to the characteristics listed which they impart to coatings, such binders can offer an even wider range of properties by means of blending or copolymerisation, producing binders which are tailor made for specific applications, it is stated. 

---