| abstract |
The invention relates to the use of an ampholytic copolymer as a colloidal stabilizer in the preparation of core-coated aminoplast microcapsules containing an active material, wherein the ampholytic copolymer comprises: - 2 to 99 mol% of cationic monomer having at least a quaternary ammonium group - 1 to 98 mol% of acrylic based monomer, - 0 to 97 mol% of non-ionic monomer, and wherein the ampholytic copolymer has more cationic charges than anionic charges, where the cationic charges of the Ampholyte copolymer are exclusively due to at least one quaternary ammonium group of the cationic monomer. |