USE OF POLYMERS FOR THE PRODUCTION OF A RODENTICIDAL PRODUCT, RODENTICIDAL PRODUCT AND PROCESS FOR THE PRODUCTION THEREOF

Abstract

The invention consists of the use of hydrophilic polymers or copolymers of the polyacrylic acid or sodium polyacrylate family, which are crosslinked, in proportions of between 50 and 10 000 parts per million, for the production of a rodenticidal product. The rodenticidal product is composed of polymers or copolymers as mentioned above and of an appetizing coating according to respective proportions of from 1% to 50% by weight for the polymer and from 99% to 50% by weight for the appetizing composition. The process comprises the steps consisting in mixing the abovementioned polymers or copolymers with an appetizing product so as to form a paste, then in using an extruder to form the product.

Claims

1-13. (canceled)

14. A method of controlling rodent populations comprising administering a rodenticidal active substance to rodent(s), wherein the rodenticidal active substance comprises hydrophilic polymers or copolymers of polyacrylic acid or polyacrylate of monovalent cation, crosslinked in proportions of between 50 and 10,000 parts per million.

15. The method of claim 14, wherein the monovalent cation is present and is a sodium cation.

16. The method of claim 14, wherein, in a presence of a mean pH of a rodent stomach medium, water absorption by said rodenticidal active substance is between 10% and 30% and wherein, in a presence of a mean pH of a rodent intestinal medium, water absorption by said rodenticidal active substance is between 50% and 100% thereby reducing rodent mortality.

17. The method of claim 14, wherein the hydrophilic polymers or copolymers are crosslinked sodium polyacrylates.

18. The method of claim 14, wherein the hydrophilic polymers or copolymers of polyacrylic acid or polyacrylate of monovalent cation is the only rodenticidal active substance.

19. The method of claim 14, wherein said polymers or copolymers are non-encapsulated.

20. The method of claim 14, wherein the polymers or copolymers are crosslinked between 100 ppm and 6000 ppm.

21. The method of claim 14, wherein the polymers or copolymers are crosslinked between 200 and 1500 ppm.

22. The method of claim 14, wherein the rodenticidal active substance is in a rodenticidal product, the rodenticidal product having an appetizing coating that coats the rodenticidal active substance and having respective proportions of 1% to 50% by weight of the rodenticidal active substance and of 50% to 99% by weight of the appetizing coating, with respect to total weight of the rodenticidal product.

23. The method of claim 22, wherein the rodenticidal products are devoid of additional rodenticidal active substance(s).

24. The method of claim 14, wherein the rodenticidal active substance is formulated in a rodenticidal product, the rodenticidal product having an appetizing coating that coats the rodenticidal active substance and having respective proportions ranging from 5% to 40% by weight of the rodenticidal active substance and ranging from 60% to 95% by weight, with respect to total weight of the rodenticidal product.

25. The method of claim 24, wherein the rodenticidal product is devoid of additional rodenticidal active substance(s).

26. The method of claim 22, wherein the appetizing coating consists of cereals and vegetable oil or paraffin.

27. The method of claim 22, wherein the rodenticidal product is provided as granules, of pastes, of blocks or of a mixture with cereals.

28. The method of claim 24, wherein the appetizing coating consists of cereals and vegetable oil or paraffin.

29. The method of claim 24, wherein the rodenticidal product is provided as granules, of pastes, of blocks or of a mixture with cereals.

30. A process for manufacturing a rodenticidal product, comprising mixing a rodenticidal active substance with an appetizing product to form a paste, and subsequently shaping the paste, wherein: the rodentcidal active substance comprises polymers or copolymers of polyacrylic acid or polyacrylate of monovalent cation, crosslinked in proportions of between 50 and 10,000 parts per million.

31. A rodenticidal product comprising at least one hydrophilic polymer or copolymer of polyacrylic acid or polyacrylate of monovalent cation and at least one appetizing product chosen from cereals, vegetable oils, paraffin, and mixtures thereof.

32. The rodenticidal product of claim 31, wherein the rodenticidal product is composed of polymers or copolymers that are hydrophilic polymers or copolymers of polyacrylic acid or polyacrylate of monovalent cation, crosslinked in proportions of between 50 and 10 000 parts per million, and an appetizing coating, the rodenticidal product having respective proportions ranging between 1% and 50% by weight of the polymer or copolymer and between 50% and 99% by weight of appetizing coating, with respect to the total weight of rodenticidal product.

33. The rodenticidal product of claim 31, wherein the rodenticidal product is composed of polymers or copolymers that are hydrophilic polymers or copolymers of polyacrylic acid or polyacrylate of monovalent cation, crosslinked in proportions of between 50 and 10 000 parts per million, and an appetizing coating, the rodenticidal product having respective proportions between 5% and 40% by weight of the polymer or copolymer and between 60% and 95% by weight of appetizing coating, with respect to the total weight of rodenticidal product.

Description

EXAMPLE NO. 1

[0061] The behavior of a polymer A (reference: PXL 150 from Aprotek) in water, the stomach medium and the intestinal medium

[0062] 1 g of polymer and 1000 g of liquid water (composition corresponding to the stomach fluid, composition corresponding to the intestinal fluid) are introduced into a beaker. Filtration is carried out at equilibrium, the filtrate is then weighed and the amount of liquid absorbed by the polymer is deduced therefrom. The operation is repeated three times at 25 and 40 C.:

TABLE-US-00001 P150 XL Water Gastric medium Intestinal medium Weight absorbed % 145-148. 20 60

EXAMPLE NO. 2

[0063] The behavior of the polymer B (reference G300 from Aprotek) in water, the stomach medium and the intestinal medium.

[0064] The absorption of the polymer B is determined under the same conditions as those described in example 1:

TABLE-US-00002 G300 Water Gastric medium Intestinal medium Weight absorbed % 400 20 93

EXAMPLE NO. 3 (COMPARATIVE)

[0065] The behavior of a polymer C (reference: Aprodev mean of the grains less than 3000 m)

TABLE-US-00003 Aprodev06 Water Gastric medium Intestinal medium Weight absorbed % 300 30 50

EXAMPLE NO. 4

[0066] Preparation of an appetizing formula with the Polymer A

[0067] 12 g of sugar (Daddy brand), 0.24 g of cooking salt (fine salt, Crbos brand), 145 g of wheat flour (T45 fluid, Sonnen Gold brand) and 22.8 g of almond powder (powdered almond, Vahin brand) are added to and mixed with 450 g of superabsorbent polymer (reference P150XL from Aprotek) in order to obtain a homogeneous mixture of powders. Subsequently, 270 g of rapeseed oil (Aurea brand) are added to this mixture with stirring. Finally, this mixture is kneaded until a homogeneous product is obtained.

EXAMPLE NO. 5

[0068] Preparation of appetizing formula with the Polymer B

[0069] 8 g of sugar (Daddy brand), 0.16 g of cooking salt (fine salt, Crbos brand), 97 g of wheat flour (T45 fluid, Sonnen Gold brand) and 15.2 g of almond powder (powdered almond, Vahin brand) are added to and mixed with 300 g of superabsorbent polymer (reference G300 from Aprotek) in order to obtain a homogeneous powder. Subsequently, 180 g of rapeseed oil (Aurea brand) are added and this mixture is kneaded until a homogeneous product is obtained.

[0070] The results of the consumption of a rodenticidal product in accordance with the invention by brown rats are presented in table 1 below; and

[0071] The results of the consumption of a rodenticidal product in accordance with the invention by mice are presented in table 2 below.

[0072] The consumption of the polymer A is lethal from the fourth day. The consumption of the polymer B is also lethal but with an effect from the sixth day.

EXAMPLE NO. 6 (COMPARATIVE)

[0073] Preparation of appetizing formula with the polymer C of comparative example 3

[0074] 8 g of sugar (Daddy brand), 0.16 g of cooking salt (fine salt, Crbos brand), 97 g of wheat flour (T45 fluid, Sonnen Gold brand) and 15.2 g of almond powder (powdered almond, Vahin brand) are added to and mixed with 350 g of superabsorbent polymer (reference Aprodev 06 from Aprotek) in order to obtain a homogeneous powder. Subsequently, 180 g of rapeseed oil (Aurea brand) are added and this mixture is kneaded until a homogeneous product is obtained.

[0075] The results of the consumption of a comparative rodenticidal product by mice are presented in table 3 below.

TABLE-US-00004 TABLE 3 BROWN RATS (Rattus norvegicus) The product was tested MICE (Mus musculus domesticus) on 5 animals and a Each product was tested on mean of the consumption 5 animals. The consumption was produced and shown is that of 5 animals was relative to/rat unit. without food competition. Consu 50% Consu 50% Day Aprodev06/rat unit Day Aprodev06/unit of 5 mice D1 1.3 D1 2.4 D2 2.6 D2 4.8 D3 3.2 D3 5.6 D4 3.4 D4 6.1 D5 1.2 D5 4.3 D6 1.1 D6 4.2

[0076] For both types of animals, no mortality was observed. This example has demonstrated the ineffectiveness of a formulation prepared with Aprodev 06.