ZUSAMMENSETZUNG MIT VERZÖGERTER FREISETZUNG ENTHALTEND EINEN WIRKSTOFF IN EINEM PLASTISCHEN TRÄGER SOWIE DARAUS HERGESTELLTE FORMKÖRPER

The invention relates to a sustained release composition containing an active agent in a plastic carrier, which comprises: (a) 1 - 30 % by weight of an insecticide, 0.1 - 20 % by weight of an insect repellent agent, and/or 0.1 - 20 % by weight of an agent for animal care, with the proviso that the total amount of component (a) does not exceed 30 % by weight; (b) 50 - 95 % by weight of a thermoplastic polymer, and (c) 1 - 22 % by weight of a liquid which is incompatible with component (b), components (a), (b) and (c) being selected so that the solubility of component (a) in component (c) is at least 10 times higher than the solubility of component (b) in component (c), component (a) is practically insoluble in component (b), and components (b) and (c) are chemically inert towards component (a), (d) optionally together with one or more additives usable in polymer processing. The invention also relates to shaped articles made from the above composition. These shaped articles can be used primarily for combatting insect pests and in animal care.