Patent ID: 7056522

Claim:
A sustained release coating composition for applying a barrier to a structure to prevent the infiltration of pest species, comprising: (a) a transport polyurethane polymer enriched in hydrophobic elements comprising one or more of non-aromatic isocyanate segments, being enriched by predominating in urea linkages, or containing hard segments and formed from a diisocyanate and a diol chain extender of up to 12 carbon atoms that has a molecular weight of less than about 1,000, wherein said diisocyanate is one or more of toluene diisocyanate (TDI), methylene diphenyl diisocyanate (MDI), polymeric methylene diphenyl diisocyanate (PMDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI) and said diamine is one or more of 4,4′-methylene dianiline, 1,4-diaminocyclohexane, 2,4-diaminotoluene, 2,6-diaminotoluene, or 1,6-diaminohexane; and (b) a pellet comprising a pesticide incorporated into a pellet polymer and dispersed in said transport polyurethane polymer, said pellet polymer being one or more of polyethylene, polypropylene, polybutenes, natural rubber, polyisoprene, polyesters, styrene butadiene rubber, polyacrylates, polymethacrylates, polyethylene terephthalate, epoxy resins, unsaturated polyester resins, or polyurethane elastomer wherein the pesticide is one or more of pyrethrin, tefluthrin, lambdacyhalothrin, cyfluthrin, deltamethrin, isofenphos, fenvalerate, cypermethrin, or permethrin.