| 摘要 |
The present invention relates to an aqueous dispersion of alkyd resin based on fatty acids possessing conjugated unsaturation which is treated with an oxidizing agent and which has a specific performance, in particular on drying, to a specific production process and to its use as binder in aqueous compositions for decorative or industrial coatings with a reduced level of drying agent or without drying agent. The aqueous dispersion comprises at least one alkyd resin, obtained from at least one unsaturated fatty acid having a level by weight of at least 5% of the said resin, which resin is treated, before and/or during and/or after the forming of the aqueous dispersion, with at least one oxidizing agent selected from: hydroperoxides, including H2O2, peroxides or singlet oxygen, and with the oxidizing treatment temperature being: i) from ambient temperature to less than 100° C., when it takes place after the forming of the dispersion, and ii) from 50 to 150° C., when it takes place before the forming of the dispersion, and iii) from 50 to less than 100° C., when it takes place during the dispersion stage.
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