Water-based paints and most of their precursors must be protected from damage by microbes. The attempts by the paint industry to reduce the amount of volatile constituents have increased the suceptibility to bacterial attack. Consequently, stronger measures have to be taken to improve product hygiene and to optimise the techniques of preservation. Moreover, the selection of preservatives id being increasingly influenced by the Directive on Biocides of the European Union. Examples of recent developments, which will also meet future demands, are represented by products composed of blends of highly active bactericides. Some of these preservation systems, based either on methylol compounds or amines, can be used either to replace or supplement the 5-chloromethylisothiazolinone that is usually used at present. Examples of new developments to meet today's and tomorrow's needs ae environmental benign combinations of highly active bactericides. Some preservative systems containing methylol compounds and amines are proposed as a supplement or an alternative to 5-chloromethylisothiazolinone .
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