Patent EA-003788-B1 (EA)
Title: Barrier preventing wood pest access to wooden structures
Inventor: VAN VORIS PETER
IPC: A01N25/10
Filed: 1998-02-20
Abstract: 1. A barrier for preventing a wood pest from accessing a wooden structure, comprising a pesticide within a polymer matrix, wherein said pesticide is in an amount that is sufficient to prevent said wood pest from breaching said barrier. 2. The barrier as recited in claim 1, wherein said pesticide is substantially not released from said barrier. 3. The barrier as recited in claim 1, wherein said pesticide is on a surface of a polymer matrix in an amount that is sufficient to prevent said wood pest from breaching said barrier. 4. The barrier as recited in claim 1, wherein polymer is hydrophobic. 5. The barrier as recited in claim 2, further comprising binding carrier, combined with a pesticide for controlling release rate, wherein said pesticide is substantially not released from said barrier. 6. The barrier as recited in claim 5, wherein a carrier is selected from the group consisting of carbon black, activated carbon, alumina, silicoaluminate, hydroxyapatite and combinations thereof. 7. The barrier as recited in claim 5, wherein said amount of binding carrier is no less than 3wt% of a matrix. 8. The barrier as recited in claim 7, wherein a matrix is formed as a sheet. 9. The barrier as recited in claim 2, wherein additionally comprising one or more additional layers, selected from sackcloth, netting, sheet and combinations thereof. 10. The barrier as recited in claim 9, wherein at least one additional layer is a sheet formed from polymer. 11. The barrier as recited in claim 9, wherein at least one additional layer is a sheet formed from mylar, saran or saranax. 12. The barrier as recited in claim 11, wherein said pesticide contains lambdacyhalthrin. 13. The barrier as recited in claim 12, wherein said polymer is a polyethylene of a low density. 14. The barrier as recited in claim 7, wherein said pesticides is combined with a carrier, and particles of the said pesticide is bound within a polymer matrix. 15. The barrier as recited in claim 1, wherein pesticide is selected from the group consisting of isofenphos, fenvalerate, cypermethrin, permethrin, pyrethrin, lambdacyhalthrin, cyfluthrin, deltamethrin and combinations thereof. 16. The barrier as recited in claim 1, wherein polymer is selected from the group consisting of polyethylene of a high density, polyethylene of a low density, vinyl acetate, urethane, polyester, santoprene, neoprene, polyethylene, polypropylene, polybutylene, epoxy polymers, polyamides, acrylate-styrene- acrylonitriles, aromatic polyesters, unsaturated polyesters, polyurethanes, silicones and its copolymers. 17. The barrier as recited in claim 1, wherein polymer is selected from the group consisting of polyethylene of a high density, polyethylene of a low density, vinyl acetate, urethane, polyester, santoprene, silicone and neoprene. 18. The barrier as recited in claim 1, wherein said amount of the pesticide is no less then 1 wt% of a matrix. 19. The barrier as recited in claim 13, wherein said amount of the pesticide is no less then 1 wt% of a matrix. 20. The barrier as recited in claim 1, further comprising another pesticide, which is a high volatility pesticide within another polymer, which is a low density polymer. 21. The barrier as recited in claim 1, wherein a matrix is in the form of a band, sheet, or a pellet. 22. The barrier as recited in claim 1, wherein the barrier has at least one impenetrable layer for a wood pest. 23. A method for creating a barrier for preventing an access of pest to an area of ground or a structure, said method comprising the following steps: a) introduction of pesticide into polymer; b) forming of a polymer matrix containing pesticide; c) forming of said barrier comprising pesticide within a matrix in an amount that is sufficient to prevent said wood pest from breaching said barrier. 24. The barrier as recited in claim 23, further comprising step of binding: mixing said pesticide with a carrier before step of forming. 25. The method as recited in claim 23, wherein step of introducing comprises polymer fusion. 26. The method as recited in claim 24, wherein pesticide is bound with a carrier so that said pesticide is substantially not released from the barrier. 27. The method as recited in claim 26, wherein binding comprises the steps of: mixing said pesticide with a carrier as a bound friable mix. 28. The method as recited in claim 26, wherein said amount of the pesticide is at least 1 wt% of a matrix. 29. The method as recited in claim 27, wherein said carrier is selected from the group consisting of carbon black, activated carbon, alumina, silicoaluminate, hydroxyapatite and combinations thereof. 30. The method as recited in claim 27, wherein said amount of the carrier is at least 3 wt% of a matrix. 31. The method as recited in claim 23, wherein said pesticide is selected from the group consisting of isofenphos, fenvalerate, cypermethrin, permethrin, pyrethrin, teflothrin, lambdacyhalthrin, cyfluthrin, deltamethrin and combinations thereof. 32. The method as recited in claim 23, wherein polymer is selected from the group consisting of polyethylene of a high density, polyethylene of a low density, vinyl acetate, urethane, polyester, santoprene, neoprene, polyethylene, polypropylene, polybutylene, epoxy polymers, polyamides, acrylate-styrene- acrylonitriles, aromatic polyesters, unsaturated polyesters, polyurethanes, silicones and its copolymers. 33. The method as recited in claim 23, wherein said pesticide is a low volatility pesticide and said polymer has a high or medium density. 34. The method as recited in claim 23, further comprising mixing of another pesticide, which is a high volatility pesticide within another polymer, which is a low density polymer. 35. The method as recited in claim 23, wherein said pesticide is lambdacyhalothin. 36. The method as recited in claim 35, wherein polymer is polyethylene of a low density. 37. The method as recited in claim 25, wherein the barrier further comprises another pesticide, which is a high volatility pesticide within another polymer, which is a low density polymer. 38. The method for preventing of entry of crawling or soil borne insects to provide long-term protection of an area of ground or a structure from intrusion by said insects, said method comprising the following steps: (a) placing a controlled release barrier at entry points to said area or structure, said barrier having an outside surface and comprising polymer and pesticide, in which pesticide is within said polymer, and said polymer forms a polymer matrix; (b) allowing the pesticide to release from a polymer matrix with the release rate that is sufficient to repel or kill insects coming in contact with the surface of the barrier so as to protect said area or said structure from intrusion by said crawling or soil borne insects. 39. The method as recited in claim 38, wherein said pesticide is substantially not released from outside surface of the barrier. 40. The method as recited in claim 38, further comprising the release rate of said pesticide onto outside surface of the barrier. 41. The method as recited in claim 38, wherein the release rate of the pesticide is at least 10 mug/cm2/day. 42. The method as recited in claim 38, wherein said pesticide is released from the polymer matrix and accumulate on said surface with the controlled release. 43. The method as recited in claim 38, wherein the polymer is selected from the group consisting of silicones, EVA, urethanes, polyurethanes, polyethylenes, acrylonitrile, butadiene, acrylic rubber, isoprene and styrene-vinyl rubber. 44. The method as recited in claim 38, further comprising step of binding of the pesticide with a carrier before adding of said pesticide within the polymer matrix for lowering of the release rate of the pesticide from the polymer matrix. 45. The method as recited in claim 44, wherein binding carrier is selected from the group consisting of carbon black, activated carbon, alumina, silicoaluminate, hydroxyapatite and combinations thereof. 46. The method as recited in claim 38, further comprising step of forming of the polymer matrix into the form of a band, a sheet, or a pellet. 47. The method as recited in claim 44, wherein the concentration of binding carrier is from about 2 to about 7 % of the total weight of the polymer matrix. 48. The method as recited in claim 38, wherein the concentration of the pesticide is from about 2 to about 15 % of the total weight of the polymer matrix. 49. The method as recited in claim 38, wherein said pesticide is selected from the group consisting of deltamethrin, cypermethrin, lambdacyhalthrin, cyfluthrin, permethrin and combinations thereof. 50. The method as recited in claim 38, wherein the pesticide is lambdacyhalthrin is and the polymer is polyethylene of a low density. 51. The method as recited in claim 38, wherein the barrier has outside surface, comprising at least one impenetrable layer for insects.