Water-in-oil emulsifiers for slow release fertilizers using tertiary alkanol amines

• US 5,512,079 A
• Filed: 11/14/1994
• Issued: 04/30/1996
• Est. Priority Date: 11/14/1994
• Status: Expired due to Term

• Current Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Inventors: Forsberg, John W., Jahnke, Richard W., Pearson, Nils O.
• Primary Examiner(s): LANGEL, WAYNE A
• Application Number:
  US08/337,800
• Time in Patent Office: 533 Days
• Field of Search: 71/64.08, 71/64.11
• US Class Current: 71/64.08
• CPC Class Codes: C05G 5/27 Dispersions, e.g. suspensions or emulsions
• CPC Class Codes: C09K 23/16 Amines or polyamines
• CPC Class Codes: C09K 23/36 Esters of polycarboxylic acids

Abstract

A non-explosive water in oil emulsion fertilizer composition is provided which comprises:

a discontinuous aqueous phase comprising at least one fertilizer component;

a continuous oil phase;

an emulsifier comprising the reaction product of at least one hydrocarbyl substituted succinic anhydride acylating agent and at least one tertiary alkanol amine.

Claims

1. A non-explosive water-in-oil emulsion fertilizer composition comprising:

a discontinuous aqueous phase comprising at least one fertilizer component;

a continuous oil phase;

an emulsifier comprising the ester salt reaction product of at least one hydrocarbyl substituted succinic anhydride acylating agent and at least one tertiary alkanol amine.

2. A fertilizer emulsion according to claim 1 wherein the hydrocarbyl substituted succinic acylating agent is represented by the formula ##STR5## wherein R is derived from a C₂ to C₁₈ olefin.

3. A fertilizer emulsion according to claim 1 wherein the hydrocarbyl substituted succinic acylating agent is represented by the formula ##STR6## wherein R is derived from a polymerized olefin;

said polymerized olefin containing between 30 and 500 carbon atoms.

4. A fertilizer emulsion according to claim 1 wherein the hydrocarbyl substituted succinic acylating agent is represented by the formula ##STR7## wherein R is derived from a polyisobutylene having a number average molecular weight (Mn) of 400 to 4000.

5. A fertilizer emulsion according to claim 1 wherein the hydrocarbyl substituted succinic acylating agent is represented by the formula ##STR8## wherein R is derived from a polyisobutylene having a number average molecular weight (Mn) of 400 to 4000 and the tertiary alkanol amine is selected from the group consisting of:

dimethylethanolamine, diethylethanolamine and triethanolamine.

6. A fertilizer emulsion according to claim 1 wherein the tertiary alkanol amine is represented by the formula:

##STR9## wherein each R is independently a hydrocarbyl group of 1 to 8 carbon atoms and R'"'"' is a divalent hydrocarbyl group of 2 to 18 carbon atoms.

7. A fertilizer emulsion according to claim 1 wherein the tertiary alkanol amine is represented by the formula:

##STR10## wherein each R is independently a hydroxyl-substituted hydrocarbyl group of 1 to 8 carbon atoms and R'"'"' is a divalent hydrocarbyl group of 2 to 18 carbon atoms.

8. A fertilizer emulsion according to claim 1 wherein the tertiary alkanol amine is represented by the formula:

##STR11## wherein each R is independently a hydrocarbyl group of 1 to 8 carbon atoms and R'"'"' is a divalent hydrocarbyI group selected from the groups consisting of ethyl, propyl and butyl.

9. A fertilizer emulsion according to claim 1 wherein the tertiary alkanol amine is selected from the group consisting of:

dimethylethanolamine, diethylethanolamine and triethanolamine.

10. A method of fertilizing plants comprising applying a fertilizer emulsion according to claim 1 to the soil in which the plants are planted.

11. A method of fertilizing plants comprising applying a fertilizer emulsion according to claim 2 to the soil in which the plants are planted.

12. A method of fertilizing plants comprising applying a fertilizer emulsion according to claim 3 to the soil in which the plants are planted.

13. A method of fertilizing plants comprising applying a fertilizer emulsion according to claim 5 to the soil in which the plants are planted.

14. A method of fertilizing plants comprising applying a fertilizer emulsion according to claim 6 to the soil in which the plants are planted.

15. A method of fertilizing plants comprising applying a fertilizer emulsion according to claim 7 to the soil in which the plants are planted.

16. A method of fertilizing plants comprising applying a fertilizer emulsion according to claim 9 to the soil in which the plants are planted.

17. A fertilizer emulsion according to claim I wherein the continuous phase is a mineral oil.

18. A fertilizer emulsion according to claim I wherein the continuous phase is a vegetable oil.