Solvent free N-alkyl thiosphoric triamide formulations for use in the stabilization of nitrogen fertilizer

1. A composition comprising

i) a solvent free liquid of at least one N-alkyl thiophosphoric triamide in at least one surfactant,

ii) an antifoam agent,

iii) a urea based fertilizer and

wherein the at least one surfactant is selected from the group consisting of:

a) alcohol alkoxylate;

b) alcohol alkoxylate sulfate;

c) alkylphenol alkoxylate;

d) alkylaryl sulfonate;

e) amine oxide;

f) betaine derivatives;

g) carboxylated alcohol or alkylphenol alkoxylate;

h) ethoxylated amine;

i) ethoxylated fatty acid;

j) ethoxylated fatty esters or oils;

k) fatty esters;

l) glycerol esters;

m) phosphate ester surfactants;

n) sarcosine derivatives;

o) silicone-based surfactants;

p) sorbitan derivatives;

q) sucrose and glucose derivatives;

r) sulfates or sulfonates of alkoxylated alkylphenols;

s) sulfates of alcohols;

t) tristyrylphenol alkoxylates;

u) polyethoxylated aliphatic phenol;

v) polymers of ethylene or proplyene oxide; and

w) ethoxylated triglycerides or seed oils.

2. The composition according to claim 1 , wherein the concentration of said N-alkyl thiophosphoric triamide ranges from 1.0 to 60.0% by weight based on the weight of the i) and ii).

3. The composition according to claim 1 , wherein the concentration of said N-alkyl thiophosphoric triamide ranges from 10 to 30.0% by weight based on the weight of the i) and ii).

4. The composition according to claim 1 , wherein the concentration of said N-alkyl thiophosphoric triamide is present in about 20% by weight based on the weight of the i) and ii).

5. The composition according to claim 1 , wherein the alkyl group in N-alkyl thiosphosphoric triamide is C 2 -C 10 alkyl.

6. The composition according to claim 4 , wherein the alkyl group in N-alkyl thiosphosphoric triamide is C 4 alkyl.

7. A composition consisting essentially of the formulation (I), (II), (III) or (IV),

Formulation (I)

N-Butyl Thiophosphorotriamide

20-28

wt. %,

Polyethoxylated (1-20 moles) Fatty Acid Amine

71.4-79.4

wt. %,

Organic Acid

0.1-0.2

wt. %,

Dye

0.1-0.5

wt. % and

Antifoam agent

0.05-0.10

wt. %

Formulation (II)

N-Butyl Thiophosphorotriamide

20-28

wt. %,

Phosphorolated Linear alcohol polyethoxylate

71.4-79.4

wt. %,

(1-20 moles)

Organic Acid

0.1-0.2

wt. %,

Dye

0.1 to 0.5

wt. % and

Antifoam agent

0.05-0.10

wt. %

Formulation (III)

N-Butyl Thiophosphorotriamide

20-28

wt. %,

Polyethoxylated (2-20 moles) C 4 -C 12 Alcohols

71.4-79.4

wt. %,

(Branched or linear) -Alkyl only (no aryl groups)

Organic acid

0.1-0.2

wt. %,

Dye

0.1 to 0.5

wt. % and

Antifoam agent

0.05-0.10

wt. %

Formulation (IV)

N-Butyl Thiophosphorotriamide

20-28

wt. %,

Phosphoric acid esters of linear or branched

5-20

wt. %,

alcohol ethoxylates

Polyethoxylated (2-20 moles) C 4 -C 12 Alcohols

50-74.0

wt. %,

(Branched or linear) -Alkyl only (no aryl groups)

Organic acid

0.1-0.2

wt. %,

Dye

0.1 to 0.5

wt. % and

Antifoam agent

0.05-0.10

wt. %

and wherein the formulation of (I) (II), (III) or (IV) is mixed with a urea based fertilizer.

8. The composition according to claim 7 , wherein the composition is of the formulation (I) or (II).

9. The composition according to claim 7 , wherein the composition is of the formulation (III) or (IV).

10. The composition as claimed in claim 7 , wherein the urea based fertilizer is a liquid or dry fertilizer.

11. The composition as claimed in claim 1 , wherein the antifoam agent is 2-ethyl hexanol or polydimethylsiloxane.

12. The composition as claimed in claim 7 , wherein the antifoam agent is 2-ethyl hexanol or polydimethylsiloxane.

13. The composition as claimed in claim 1 , consisting essentially of i) a solvent free liquid concentrate of at least one N-alkyl thiophosphoric triamide in the at least one surfactant, ii) 0.005 to 0.5 wt. % based on the total amount of i) and ii) of the antifoam agent and iii) the urea based fertilizer.

14. A method of making a fertilizer which comprises mixing ingredients i) and ii) of the composition as claimed in claim 1 with the urea based fertilizer of the composition of claim 1 .

15. A process to grow plants which comprises adding the composition as claimed in claim 1 to a soil, water, or other media that is used for the purposes of growing plants.

16. A process to improve the efficacy of nitrogen stabilization provided by an application N-alkyl thiophosphoric triamide treated fertilizer to soil, water, or other media used for the purposes of growing plants which comprises adding the composition as claimed in claim 1 to a plant.