Storage-stable microbicidal concentrates and use thereof as preservatives

1. A chemical preservative comprising:

a) phenoxyethanol,

b) 2-butyl-1,2-benzisothiazolin-3-one, and

c) N,N-bis(3-aminopropyl) dodecylamine,

wherein the weight ratio of compound b) to compound a) (b/a) is greater than or equal to (>) 10 −3 and less than or equal to 10 −1 , and the weight ratio of compound c) to compound a) (c/a) is greater than or equal to 5×10 −4 and less than or equal to 6×10 −2 .

2. The chemical preservative according to claim 1 , in which the concentration of component a) expressed in percentage by weight of the chemical preservative, is from 93.5% to 99.4%.

3. The chemical preservative according to claim 2 , in which the concentration of component b) expressed in percentage by weight of the chemical preservative, is from 0.5% to 5%.

4. The chemical preservative according to claim 3 , in which the concentration of component c), expressed in percentage by weight of the chemical preservative, is from 0.1% to 1.5%.

5. The chemical preservative according to claim 2 , in which the concentration of component a) expressed in percentage by weight of the chemical preservative, is from 97.75% to 99%.

6. The chemical preservative according to claim 5 , in which the concentration of component b) expressed in percentage by weight of the chemical preservative, is from 0.75% to 1.25%.

7. The chemical preservative according to claim 6 , in which the concentration of component c), expressed in percentage by weight of the chemical preservative, is from 0.25% to 1.0%.

8. The chemical preservative according to claim 1 , in which the weight ratio (b/a) is superior or equal to 5×10 −3 and less than or equal to 5×10 −2 and the weight ratio (c/a) is superior or equal to 10 −3 and less than or equal to 10 −2 .

9. The chemical preservative according to claim 8 , in which the weight ratio (b/a) is superior or equal to 8×10 −3 and less than or equal to 1.5×10 −2 and the weight ratio (c/a) is superior or equal to 2.5×10 −3 and less than or equal to 5×10 −3 .

10. The chemical preservative according to claim 5 , in which the concentration of component b) expressed in percentage by weight of the chemical preservative is from 0.75% to 1.25%, and the concentration of component c) expressed in percentage by weight of the chemical preservative is from 0.25% to 0.7%.

11. A process to inhibit and/or to control the growth of microorganisms in a water-based composition, which comprises successive additions in said water-based composition of:

a) phenoxyethanol,

b) 2-butyl-1,2-benzisothiazolin-3-one, and

c) N,N-bis(3-aminopropyl) dodecylamine,

wherein the weight ratio of compound b) compound a) (b/a) is greater than or equal to (>) 10 −3 and less than or equal to 10 −1 , and the weight ratio of compound c) to compound a) (c/a) is greater than or equal to 5×10 −4 and less than or equal to 6×10 −2 , in order that said water-based composition finally contains for 100% of a weight of the water-based composition from 0.01% to 2.00% by weight of the chemical preservative according to claim 1 .

12. A process to inhibit and/or to control the growth of microorganisms in a water-based composition, which comprises adding the chemical preservative according to claim 1 , in order that said water-based composition finally contains for 100% of a weight of the water-based composition from 0.01% to 2.00% by weight of said chemical preservative.

13. The process according to claim 11 , in which said water-based composition is a water-based product chosen from a polymer dispersions, a paint, plasters, an adhesive, a sealing composition, a paper coating composition, a textile softening, a sizing composition, a washing raw material, a cleaning and domestic product, a surfactant, a polishing composition, a spinning bath, a cooling lubricant, a leather treatment composition, a silicone and bitumen emulsion or a concrete admixture.

14. The chemical preservative according to claim 2 , in which the weight ratio (b/a) is superior or equal to 5×10 −3 and less than or equal to 5×10 −2 and the weight ratio (c/a) is superior or equal to 10 −3 and less than or equal to 10 −2 .

15. The chemical preservative according to claim 3 , in which the weight ratio (b/a) is superior or equal to 5×10 −3 and less than or equal to 5×10 −2 and the weight ratio (c/a) is superior or equal to 10 −3 and less than or equal to 10 −2 .

16. The chemical preservative according to claim 4 , in which the weight ratio (b/a) is superior or equal to 5×10 −3 and less than or equal to 5×10 −2 and the weight ratio (c/a) is superior or equal to 10 −3 and less than or equal to 10 −2 .

17. The chemical preservative according to claim 5 , in which the weight ratio (b/a) is superior or equal to 5×10 −3 and less than or equal to 5×10 −2 and the weight ratio (c/a) is superior or equal to 10 −3 and less than or equal to 10 −2 .

18. The chemical preservative according to claim 6 , in which the weight ratio (b/a) is superior or equal to 5×10 −3 and less than or equal to 5×10 −2 and the weight ratio (c/a) is superior or equal to 10 −3 and less than or equal to 10 −2 .

19. The chemical preservative according to claim 7 , in which the weight ratio (b/a) is superior or equal to 5×10 −3 and less than or equal to 5×10 −2 and the weight ratio (c/a) is superior or equal to 10 −3 and less than or equal to 10 −2 .

20. A process to inhibit and/or to control the growth of microorganisms in a water-based composition, which comprises successive additions in said water-based composition of:

a) phenoxyethanol,

b) 2-butyl-1,2-benzisothiazolin-3-one, and

c) N,N-bis(3-aminopropyl) dodecylamine,

wherein the weight ratio of compound b) to compound a) (b/a) is greater than or equal to (>) 10 −3 and less than or equal to 10 −1 , and the weight ratio of compound c) to compound a) (c/a) is greater than or equal to 5×10 −4 and less than or equal to 6×10 −2 , in order that said water-based composition finally contains for 100% of a weight of the water-based composition from 0.01% to 2.00% by weight of the chemical preservative according to claim 2 .