Composite polymer devices for controlled release of...

A - Human Necessities – 01 – N

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A01N 25/10 (2006.01) A01N 25/18 (2006.01) A01N 47/10 (2006.01)

Patent

CA 2220500

Composite polymer dispensers capable of controlled release of semiochemicals have been developed. The dispensers make use of a solid elastomer matrix reservoir which is at least partially surrounded by a permeable release rate controlling polymer membrane. The matrix materials are polyurethanes compatible with many types of semiochemicals and additives. The release rates of semiochemicals from the dispensers can be varied over a wide range by manipulation of the reservoir conditions and by selection of the type of permeable polymer membrane surrounding the device. The dispensers can have a variety of forms and can be produced by a simple process. The semiochemical devices produced by this method are useful for managing insect and other pests through attraction to traps, for population monitoring or for mass trapping. The devices may also be used to dispense anti-aggregation pheromones or repellents in addition to use for mating confusion or disruption.

On a mis au point des distributeurs polymériques mixtes permettant la libération prolongée d'écomones. Les distributeurs utilisent un réservoir à matrice élastomère solide, entouré au moins partiellement d'une membrane polymérique perméable déterminant le taux de libération. Les matériaux de la matrice sont des polyuréthanes compatibles avec de nombreux types d'écomones et d'additifs. On peut faire varier dans une grande plage les taux de libération d'écomones à partir des distributeurs en faisant varier les conditions relatives au réservoir et en choisissant le type de membrane polymérique perméable, entourant le dispositif. Les distributeurs peuvent avoir des formes diverses et être produits par un procédé simple. Les dispositifs semiochimiques produits grâce à cette méthode sont utiles pour la gestion des insectes et d'autres parasites, en les attirant vers des pièges, aux fins de surveillance des populations ou de piégeage en masse. Les dispositifs peuvent également servir à distribuer des répulsifs ou des phéromones anti-agrégation, en plus de leur emploi pour contrôler des situations confuses ou perturbatrices.

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