| Résumé : |
The various types of polymers used in waterborne coatings are reviewed systematically from the point of view of the methods of synthesis and their principal physical characteristics. The polymer types range from the two extremes of dispersions of highly insoluble polymers in water to highly water-soluble polymers, and cover a whole range of intermediate types, such as hydrophobically modified water-soluble polymers, swollen microgels, alkali soluble emulsions, alkali swellable emulsions, and water-reducible polymers. The key properties of each type are discussed with reference to the ways they are utilized in aqueous coatings and their film forming behavior. Particular emphasis is placed on key developments over the years, and on more recent developments, such as associative thickeners, aqueous dispersions of step growth polymers (notably aqueous polyurethanes), hybrid systems in which more than one polymer type is combined in the same system, aqueous radiation curing, voided polymer particles, and sequential polymerization techniques to give control over the morphology of emulsion polymer particles. The paper ends with a discussion of some of the deficiencies of waterborne coatings which will need to be addressed in the future. |
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Accueil
Polymers for water-based coatings - a systematic overview in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 839 (12/1994)
