By G. Davison, B.C. Lane
Ingredients in Water-borne Coatings covers either present know-how and the long run diagnosis for the foremost ingredients utilized in water-borne coatings at the present time. It brings jointly foreign services to supply a complete, sensible evaluation of the sector, its course, and choice of key ingredients at present hired for in-depth therapy in their use, behaviour and scope through specialist practitioners in these ingredients. This well timed booklet comprises first-class plenary chapters reviewing the advancements including the regulatory and legislative scene within the total box. It additionally includes seven in-depth chapters dedicated to key additive kinds, in particular; rheology modifiers, matting brokers, floor energetic brokers, dispersants, defoamers, and biocides. moreover, the publication offers: ·a systematic method of additive choice - additive principles - for the improvement of a coating ·a stable knowing of the biocidal degradation results and the foremost biocide strengths and weaknesses in addressing them ·the reader with a radical figuring out of silica-based matting brokers and their mode of motion ·useful overviews of water borne dispersants, silicone floor energetic brokers and cellulosic and associative thickener rheology modifiers This key ebook amalgamates a few of the most modern advancements during this box and offers an authoritative resource of data for the study neighborhood and people within the undefined, in addition to supplying important info to graduate and postgraduate scholars.
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Extra info for Additives in Water-Borne Coatings (Special Publication)
A series of high surface area blacks with different surface chemistries has been evaluated with a range of polymeric dispersants to study optimum jetness. 2 Dispersion of Transparent Iron Oxides Another small particle size pigment with consequently high surface area, which is difficult to stabilize in water-based media, is transparent iron oxide. High pigment loadings are difficult to achieve in practice with viscosity stability on storage a further issue. Formulators tend to compromise on pigment loading to achieve stable viscosity profiles but this approach will limit transparency and brilliance.
For example, stronger pigment wetting effects are found with additives containing multiple anchor groups. These are much less likely to desorb from the surface of the dispersed pigment and cause interface problems such as foam. As water-based paints become much more widespread in use, then the challenges to achieving a direct match to solvent based paints become more acute. For example, automotive coloured base coats in Europe are mainly water based whilst repair paints are stilI mainly solvent based.
Pre-dosing with components of the mill base surfactant system will reduce shock effects and in some cases avoid total flocculation. Compatibility rules The issue of ‘compatibility’ provides a hrther illustration of both heuristic and theoretical rules that underpin formulation and additive selection. The components of a coating will all have a positive or negative affinity for each other that can be related to intermolecular forces and thermodynamics and broadly grouped under the heading of ‘surface energy’ .
Additives in Water-Borne Coatings (Special Publication) by G. Davison, B.C. Lane