Verfahren zur Verminderung des C¶1¶-C¶2¶-Aldehyd-Gehalts aus Verbindungen mit CH¶2¶-CHR-0- oder -CH¶2¶-CH(OH)-Gruppen

摘要

The invention relates to a method for reducing the content of small quantities of C1-C2-aldehydes formed from organic compounds with -CH2-CHR-O- and/or -CH2-CH(OH)-groups (R=H, C1-C4-alkyl) as a result of radical action, to <1 ppm by adding compounds which react with said aldehyde groups. Substances with the aforementioned groups also include many emulsifiers and protective colloids used in polymer chemistry, such as polyethylene glycols, polyvinyl alcohols or products of ethoxylation of long-chained alcohols, phenols or amines. The inventive method is particularly useful for treating polymer dispersions produced by radical polymerisation of monomers in the presence of these types of emulsifiers or protective colloids and enables the production of aldehyde-free polymer dispersions which can then be used for sanitary and hygiene products.