By G. Davison, B.C. Lane
Ingredients in Water-borne Coatings covers either present know-how and the longer term diagnosis for the foremost ingredients utilized in water-borne coatings at the present time. It brings jointly overseas services to supply a finished, functional review of the sector, its path, and choice of key ingredients at present hired for in-depth remedy in their use, behaviour and scope by way of specialist practitioners in these ingredients. This well timed e-book contains first-class plenary chapters reviewing the advancements including the regulatory and legislative scene within the total box. It additionally comprises seven in-depth chapters dedicated to key additive varieties, particularly; rheology modifiers, matting brokers, floor lively brokers, dispersants, defoamers, and biocides. furthermore, the e-book presents: ·a systematic method of additive choice - additive ideas - for the advance of a coating ·a stable realizing of the biocidal degradation results and the major 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 many of the most up-to-date advancements during this box and offers an authoritative resource of knowledge for the study group and people within the undefined, in addition to offering helpful info to graduate and postgraduate scholars.
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Additional resources for Additives in Water-Borne Coatings (Special Publication)
Once in a paint system the thickener backbone is too big to position itself between two adjacent particles and thus remains at the outside. Being more hydrophilic than the latex or pigment particles, it attracts by osmotic pressure the water molecules that are between these particles and then contributes to a reduction of the interparticle distance, and so on, until an equilibrium is reached with the phase separation status (Figure 1). This phenomenon is reversible and thus cannot be seen as true flocculation, although the adverse effects are similar: structure build-up, yield point, poor flow, low gloss and opacity, etc ...
In addition to an outstanding spatter resistance, the material provides higher brushing viscosity but also better levelling when compared with higher molecular weight HEC, at equal thickening efficiency. 7 CONCLUSION The usual cellulosics can be characterised as being the workhorses of the industry when it comes to flat and semi-gloss waterborne paint formulations. (E)HEC, CMC and MC types provide their specific rheology profiles while the associative (E)HEC versions provide good enhanced formulations.
2. , B. , Vol23, M. ), Wiley, New York, 1997,478-541. 3. G. Bognolo, Surface Active Behaviour of Performance Surfactants, Annual Surfactants Review, Vol3, D. Karsa (Ed), Sheffield Academic Press, 2000, 1-65. 4. D. R. Karsa, Spec. Publ, R. Chem. 1987,59,1-23. 5. K. R. Lange, Surfactants, K. R. Lange (Ed), Verlag, Munich, 1999, 144-70. 6. M. J. Schick, E. A. Berger, JOCCA 1963,40,66-8. 7. J. Bieleman, in Additives for Coatings, J. Bieleman (Ed), Wiley-VCH, Weinheim, 2000,65-99. 8. Degussa Technical Information - Pigment Blacks in Waterborne Paint (TI 1227).