AQUEOUS POLYMERIC DISPERSION CONTAINING AN ORGANIC ACID

摘要

The invention relates to an aqueous polymeric dispersion, characterised in that it comprises : a) at least one polymer in aqueous dispersion having a minimum film- forming temperature (MFFT) between 0 and 100°C, b) from 0.05 to 30%, preferably from 0.1 to 30% by weight with respect to the said aqueous dispersion a), of at least one organic carboxylic acid in C₁ to C₂₅, or of their mixtures and, the said organic carboxylic acid b) and its content in the said aqueous dispersion, is selected to be compatible with the said aqueous polymeric dispersion a) as such, and with the said polymer, as polymer itself, the said acid b) is present in its acid form with the pH of the said aqueous dispersion a) being adjusted to be lower than the pKa of the said organic carboxylic acid when the said acid is in C₁-C₆acids. The invention does also cover a process of preparation, an end-use composition comprising the said aqueous polymeric dispersion for various specific uses in : paints, varnishes, inks, glues, adhesives, construction materials, fibre sizing compositions or textile or leather treatment compositions, or food coatings or packagings. More particularly, the invention concerns peelable coatings : industrial protective coatings and food protective coatings.