Asphalt emulsion composition and method of treating a pavement surface

Patent metadata

Field	Value
Publication number	US-11447637-B2
Application number	US-202016806416-A
Country	US
Kind code	B2
Filing date	Mar 2, 2020
Priority date	Mar 15, 2019
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

Compositions and methods are provided for treating a pavement such as by microsurfacing or slurry sealing. The compositions contain iron chelants that are effective in reducing discoloration of the pavement surface.

First claim

What is claimed is:

1. A composition for preparing an asphalt emulsion, comprising an emulsifier and an iron chelant, wherein the iron chelant comprises:
a carboxylic acid derivative of an alkylamine having the formula:

wherein:
R 1 , R 2 , R 4 , R 5 , and R 6 are each individually hydrogen, C 6 -C 30 alkyl, or —R 7 COOH;
R 3 and R 7 are each individually alkylene;
n is 0; and
at least one of R 1 , R 2 , R 4 , and R 5 is C 6 -C 30 alkyl, and at least one of R 1 , R 2 , R 4 , and R 5 is —R 7 COOH.

2. The composition of claim 1 , wherein the iron chelant further comprises catechol; or alkyl catechol.

3. The composition of claim 1 , wherein:
R 1 is C 8 -C 22 alkyl; R 2 , R 4 , and R 5 are each individually hydrogen or —R 7 COOH; R 3 and R 7 are each individually C 1 -C 6 alkylene; n is 0; and at least one of R 2 , R 4 , and R 5 is —R 7 COOH.

4. The composition of claim 3 , wherein R 1 is tallow, R 3 is propylene, and R 7 is methylene.

5. The composition of claim 1 , wherein the emulsifier comprises a tallow amine, a tallow diamine, a diquaternary amine, a tallow tetramine, a tallow diquaternary amine, oleic acid, a tall oil, a tall oil resin, a tall oil imidazoline, a tall oil fatty acid, a soybean fatty acid, a tall oil fatty acid and soybean fatty acid polyalkyleneamine condensate, a lignosulphonate, a lignin, a lignin amine, an imidazoline, an amidoamine, an amidopolyamine, a triglyceride, an ethoxylate, an alkoxylate, a carboxylate, a polycarboxylate, a sulfonate, a fatty amine, a fatty acid, a rosin acid, alkylphenol alkoxylate, or combination thereof.

6. The composition of claim 1 , further comprising an organic solvent, water, a base, an acid, or a combination thereof.

7. The composition of claim 6 , wherein the organic solvent comprises methanol, ethanol, propanol, isopropanol, butanol, 2-ethylhexanol, hexanol, octanol, decanol, 2-butoxyethanol, methylene glycol, ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, diethyleneglycol monomethyl ether, diethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, pentane, hexane, cyclohexane, methylcyclohexane, heptane, decane, dodecane, diesel, toluene, xylene, heavy aromatic naphtha, cyclohexanone, diisobutylketone, diethyl ether, propylene carbonate, N-methylpyrrolidinone, N,N-dimethylformamide, or a combination thereof.

8. The composition of claim 6 , wherein:
the base comprises sodium hydroxide, magnesium hydroxide, potassium hydroxide, calcium hydroxide, ammonium hydroxide, sodium carbonate, sodium bicarbonate, or a combination thereof; or
the acid comprises an inorganic acid or an organic acid.

9. The composition of claim 6 , comprising:
from about 5 to about 30 wt. % of the iron chelant and about 40 to about 95 wt. % of the emulsifier based on the total weight of the composition; or
from about 5 to about 25 wt. % of the iron chelant and from about 55 to about 90 wt. % of the emulsifier based on the total weight of the composition; or
from about 10 to about 20 wt. % of the iron chelant and from about 60 to about 90 wt. % of the emulsifier based on the total weight of the composition.

10. The composition of claim 9 , further comprising:
from about 0.1 to about 10 wt. %, from about 0.1 to about 5 wt. %, or from about 0.2 to about 1 wt. % of the base or the acid based on the total weight of the composition; or
from about 0.1 to about 25 wt. %, from about 5 to about 20 wt. %, or from about 10 to about 20 wt. % of the organic solvent based on the total weight of the composition; or
from about 0.1 to about 10 wt. %, from about 0.1 to about 6 wt. %, or from about 0.1 to about 4 wt. % water based on the total weight of the composition.

11. The composition of claim 1 , wherein the emulsifier comprises a tallow diquaternary amine, a tall oil imidazoline, a tall oil fatty acid and soybean fatty acid polyalkyleneamine condensate, or combination thereof.

12. The composition of claim 1 , wherein one, two or three of R 1 , R 2 , R 4 , and R 5 is —R 7 COOH; each R 3 is individually C 2 -C 4 alkylene; each R 7 is individually C 1 -C 4 alkylene; and n is 0.

13. A composition for preparing an asphalt emulsion, comprising an emulsifier and an iron chelant, wherein the iron chelant comprises a carboxylic acid derivative of an alkylamine having the formula:

wherein:
R 1 , R 2 , R 4 , R 5 , and R 6 are each individually hydrogen, C 6 -C 30 alkyl, or —R 7 COOH;
R 3 and R 7 are each individually alkylene;
n is 1, or 2; and
at least one of R 1 , R 2 , R 4 , R 5 , and R 6 is C 6 -C 30 alkyl, and at least two of R 1 , R 2 , R 4 , R 5 , and R 6 is —R 7 COOH.

14. The composition of claim 13 , wherein two or three of R 1 , R 2 , R 4 , R 5 , and R 6 is —R 7 COOH; each R 3 is individually C 2 -C 4 alkylene; each R 7 is individually C 1 -C 6 alkylene; and n is 1.

15. The composition of claim 13 , wherein R 1 is C 8 -C 22 alkyl; R 2 , R 4 , R 5 , and R 6 are each individually hydrogen or —R 7 COOH; R 3 and R 7 are each individually C 1 -C 6 alkylene; n is 1 or 2; and at least two of R 2 , R 4 , R 5 , and R 6 is —R 7 COOH.

16. The composition of claim 15 , wherein R 1 is tallow, R 3 is propylene, and R 7 is methylene.

17. The composition of claim 13 , wherein the emulsifier comprises a tallow amine, a tallow diamine, a diquaternary amine, a tallow tetramine, a tallow diquaternary amine, oleic acid, a tall oil, a tall oil resin, a tall oil imidazoline, a tall oil fatty acid, a soybean fatty acid, a tall oil fatty acid and soybean fatty acid polyalkyleneamine condensate, a lignosulphonate, a lignin, a lignin amine, an imidazoline, an amidoamine, an amidopolyamine, a triglyceride, an ethoxylate, an alkoxylate, a carboxylate, a polycarboxylate, a sulfonate, a fatty amine, a fatty acid, a rosin acid, alkylphenol alkoxylate, or a derivative or combination thereof.

18. The composition of claim 13 , further comprising an organic solvent, water, a base, an acid, or a combination thereof.

19. The composition of claim 18 , wherein the organic solvent comprises methanol, ethanol, propanol, isopropanol, butanol, 2-ethylhexanol, hexanol, octanol, decanol, 2-butoxyethanol, methylene glycol, ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, diethyleneglycol monomethyl ether, diethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, pentane, hexane, cyclohexane, methylcyclohexane, heptane, decane, dodecane, diesel, toluene, xylene, heavy aromatic naphtha, cyclohexanone, diisobutylketone, diethyl ether, propylene carbonate, N-methylpyrrolidinone, N,N-dimethylformamide, or a combination thereof.

20. The composition of claim 18 , wherein:
the base comprises sodium hydroxide, magnesium hydroxide, potassium hydroxide, calcium hydroxide, ammonium hydroxide, sodium carbonate, sodium bicarbonate, or a combination thereof; or
the acid comprises an inorganic acid or an organic acid.

21. The composition of claim 18 , comprising:
from about 5 to about 30 wt. % of the iron chelant and about 40 to about 95 wt. % of the emulsifier based on the total weight of the composition; or
from about 5 to about 25 wt. % of the iron chelant and from about 55 to about 90 wt. % of the emulsifier based on the total weight of the comp

Assignees

• Ecolab Usa Inc

Inventors

• Gabel Robert
• Vale Glenda
• Bauch Eric
• Nair Chenthamarkshan
• Meyers Adam

Classifications

• E01C7/353

  with exclusively bituminous binders; Aggregate, fillers or other additives for application on or in the surface of toppings with exclusively bituminous binders, e.g. for roughening or clearing · CPC title

• C07C211/65 Primary

  Metal complexes of amines · CPC title

• C08L91/00

  Compositions of oils, fats or waxes; Compositions of derivatives thereof · CPC title

• C08L95/005 Primary

  Aqueous compositions, e.g. emulsions · CPC title

• C08K5/19

  Quaternary ammonium compounds · CPC title