CA1166956A - Stable toxicant compositions - Google Patents
Stable toxicant compositionsInfo
- Publication number
- CA1166956A CA1166956A CA000407906A CA407906A CA1166956A CA 1166956 A CA1166956 A CA 1166956A CA 000407906 A CA000407906 A CA 000407906A CA 407906 A CA407906 A CA 407906A CA 1166956 A CA1166956 A CA 1166956A
- Authority
- CA
- Canada
- Prior art keywords
- composition
- weight
- toxicant
- percent
- castor oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
ABSTRACT OF THE DISCLOSURE
Stable toxicant compositions comprising a toxicant and a Castor Oil based nonionic surfactant containing from 5 to 55 moles of ethylene oxide chemically combined with each mole of Caster Oil.
Stable toxicant compositions comprising a toxicant and a Castor Oil based nonionic surfactant containing from 5 to 55 moles of ethylene oxide chemically combined with each mole of Caster Oil.
Description
3 9 5 ~
STABLE TOXICANT COMPOSITIONS
This invention relates to stable toxicant composikions and more particularly, this invention pro-vides a stable toxicant composition which is in the form of a solution which is dispersible in water to form a stable emulsion and which comprises the following com-ponents: (A) at least one insecticidally active toxican-t, (B) at least one nonionic surfactant comprising a Castor Oil based nonionic surfactant and (C~ at least one anionic .
~; surfactant; the proportions of said components being such that the composition is dispersible in water to form a stable emulsion which is insecticidally active. The composition of this invention may be prepared by com-bining the components in any order or manner and stirring the mixture, with heating if desired, until a homogeneous ~table solution is formed. The flash point of such mixtures is generally and preferably above 38CC.
Stable aqueous emulsions are prepared by diluting the compositions with water to prepare the desired final concentration of koxicant. In such dilutions the toxicant may be present in amounts of from :
28, 830A-F -1- ~
" .i~
0.001 to 10 percent by weight, advantageously 0.006 to lO percent by weight and preferably from 0.01 to 5 percent - by weight. Additives such as, for example,antifoamers, reodorants and antimicrobials may be added if desired.
The compositions of this invention can be frozen and thawed without destabiliziny. Further, the compositions can be heated to 50C without destabilizing and they can be stored for at least six months at room temperature without destabilizing.
Water immiscible solvents, i.e., solvents that are insoluble in water or only slightly soluble in water, such as, for example, hydrocarbon and chlorinated hydro-carhon solvents may be employed in amounts of from 0 to 75 percent by weight, based on total composition weight, to provicle low temperature stability and, when used, are preferably used in an amount of from 2 to 50 percent by weight. Aromatic hydrocarbon solvents such as, for example, the isomers of triethylbenzene, ethylmethyl-benzene, xylene, toluene, and ethylnaphthalenes are preferred, although other water immiscible solven-ts known to those skilled in the art may be employed. Mixtures of the above may also be utilized.
Anionic surfactants which are soluble in the toxicant-solvent-surfactant solution such as, for example, the alkali or alkaline earth metal salts of dodecylben-zenesulfonic acid, are employed in amounts of from 5 to 50 percent by weight, preferably in amounts of from 5 to 30 percent by weight, based on the total weight of the concentrate.
.
28,830A-F -2-In addi-tion to the Castor Oil based nonionic surfactant, which is critical to the present invention, and is advantageously employed in amounts of from 10 to 80 percent by weight, preferably in amounts of from 20 to 60 percent by weight, based on the total weight of the concentrate, one may employ other nonionic surfactants such as, for example, the alkylphenol/alkylene oxide condensation products taught in U.S. Patent 3,683,078, issued August 8, 1972, and the products obtained by reacting propylene glycol with propylene oxide followed by ethylene oxide to molecular weight of 2,000 to 3,000 or more.
The Castor Oil based nonionic surfactant pre-ferably contains from 5 to 55 moles of ethylene oxide chemically combined with each mole of Castor Oil and advantageously contains from 30 to 50 moles of ethylene oxide per mole of Castor Oil.
The stable toxicant compositions of this invention advantageously comprise from 1 to 50 percent by weight, based on total composit;ion, of the toxicant which is, preferably, pyrethrin, a synthetic pyrethroid, a thiophosphate ester or a carbamic acid ester.
.
When employing a solvent the toxicant/solvent ratio may be from 10:1 to 1:10 on a weight basis. The preferred ratio is from 10:1 to 2:1.
The synthetic pyrethroids which may be employed in the present invention include, for example, those having the formula 28,830A F -3-, ~. ~66~'3~
H Z
R-O-R'-C-O~C CH=C
"
wherein R and R' are lnterchangeably phenyl, pyridyl or substitued phenyl or pyridyl rings, X is hydrogen or cyano and Z and Z' may be the same or different and each is halo such as chloro, bromo or fluoro. Preferred pyrethroids are permethrin, decamethrin, dimethrin and cypremethrin.
Thiophosphate esters which may be employed in the present invention include, for example, coumo-phos, bromophos-ethyl, diazinon, dioxathion, chlor-pyrifos, ethionr malathion, oxinothiophos, beno~aphos, `~ 15 carbophenothion and phosmet which are descrlhed in The Wellcome Foundation Ltd.'s South Arican Patent Application 77/7609. The preferred thiophosphate esters are chlorpyrifos and chlorpyrifos-methyl.
Carbamic acid esters which may be;employed in the present invention include any of those known in ~- the art, preferably propoxur, carbaryl and carbofuran.
By "insecticidally active" is meant that the ~; toxicants are adapted to kill or control insects when applied to the habitats thereof by means generally employed by those skilled in the art.
The following examples, wherein all percen-tages are by weight unless~o~therwise indicated, further illustrate the present invention.
.~ ~
28,830A-F -4-..... .
:' 9 ~ ~
Example 1 Chlorpyrifos - 30 Tenneco~ 500/100 - 20 Casul~ 70HF - 18 5 T-Det~ N - 10.5 - 12 T-Det~ C-40 - 20 Tenneco~ 500/100 is a mixture of isomers of triethyl~
benæene, ethylmethylbenzene and o-xylene.
Casul~ 70HF is the calcium salt of dodecylbenzenesul-fonic acid.
T~Det~ N - 10.5 is the reaction product of nonylphenol with about 10 moles of ethylene oxide.
.~' .
T-Det~ C-40 is the reaction product of one mole of Castor Oil with 40 moles of ethylene oxide.
:
The ingredients were combined and stirred at 50C for about one-half hour forming a homogeneous stable composition. Dilution of 1.7 parts of this composition with 98.3 parts water followed by mild agitation provided a stable emulsion suitable for use.
Employing the a~ove procedure the following formulations wère prepared, in each case forming a stable composition and a stable emulsion when diluted.
28,830A-F -5 3 ~ ~
~6--Example 2 Chlorpyrifos 30 Tenneco~ 500/100 - 20 Casul~ 70HF- 15 T-Det~ C-40 - 35 ;'~
`; Exam~le 3 :;~
~: Chlorpyrios- 30 : Temleco~ 500/100 20 Casul~ 70HF- 12 19 T-Det~ EPO - 61 - 8 ~ T-Det~ C 40~ 30 ;~ T-Det~ EPO - 61 is the reaction product of propylene :~ glycol with propylene oxide and then ethylene oxide ~ to a molecular weight of about 2000.
, ~;~ 15 Example 4 Diazinon ~ 19.3 ~:~ 40~ P~rethrin Conc. - 4.8 . Piperonyl Butoxide - 5.8 Tenneco~ 500/100 - 20.0 Casul~ 70HF - 18.0 T-De.t3 N - 10.5 - 12.0 T-Det~ C-40 - 20.0 28,830A-F -6-.",.~
~.
.. .
Dilution of 5.2 parts of this composition with 94.8 parts water followed by mild agitation produced a stable emulsion suitable for use.
The addition of 3.3 percent by weight of the ~-cyano 3-phenoxybenzyl ester of 3~(2,2-dichloro-ethenyl)-2,2-dimethylcyclopropane carboxylic acid to 96.7 percent by weight of the mixture of Example 3 resulted in the formation of a stable composition and a stable emulsion when diluted.
The addition of 7 percent by weight of resmethrin to 93 percent by weight of the mixture of Example 3 also resulted in the formation of a stable composition and a stable emulsion when diluted.
The substitution of diazinon (87.9%) for chlorpyrifos in Examples 1 and 3 resulted in the formation of stable compositions and stable emulsions on dilution.
The substitution of chlorpyrifos-methyl for rhlorpyrifos in Example 3 resulted in the formation of a stable composition and a stable emulsion on dilution.
The substitution of malathion for chlor-pyrifos in E~ample 1 resulted in the formation of a stable composition and a stable emulsion on dilution.
The following formulations also provided compositions in solution form which were dispersible in water to form stable emulsions.
28,830A-F -7-.
' 6 ~ 5 ~
Example 5 Chlorpyrifos - 25 Tenneco~ 500/10010 Anionic* - 5 T-Det~ N - 10.5 - 20 T-Det~ C~40 - 40 *Diethanolamine salt of dodecylbenzenesulfonic acid.
.~
Exampl 6 Chlorpyrifos - 40 Tenneco~ 500/100 - 4 Anionic* - 8 T-Det~ EP0 61 - 20 ~ T~Det~ C-40 - 28 :~ *See Example 5 Example 7 Chlorpyrifos - 25 ~: Tenneco~ soa/loo - 15 :~ Anionic* - 5 : T-Det~ EP0-61 - 17 T-Det~ C-40 - 38 *Ninate 415 - K salt of an aryl al.kyl sulfonic acid.
,~ ~
28,830A-F -8-'' , ' Example 8 Propoxur - 5 Ethyl acetate - 45 Anionic* - 10 T-Det~) EPO-61 - 15 T-Det~ C-40 - 25 *See Example 5 28, 830l~-F -9-
STABLE TOXICANT COMPOSITIONS
This invention relates to stable toxicant composikions and more particularly, this invention pro-vides a stable toxicant composition which is in the form of a solution which is dispersible in water to form a stable emulsion and which comprises the following com-ponents: (A) at least one insecticidally active toxican-t, (B) at least one nonionic surfactant comprising a Castor Oil based nonionic surfactant and (C~ at least one anionic .
~; surfactant; the proportions of said components being such that the composition is dispersible in water to form a stable emulsion which is insecticidally active. The composition of this invention may be prepared by com-bining the components in any order or manner and stirring the mixture, with heating if desired, until a homogeneous ~table solution is formed. The flash point of such mixtures is generally and preferably above 38CC.
Stable aqueous emulsions are prepared by diluting the compositions with water to prepare the desired final concentration of koxicant. In such dilutions the toxicant may be present in amounts of from :
28, 830A-F -1- ~
" .i~
0.001 to 10 percent by weight, advantageously 0.006 to lO percent by weight and preferably from 0.01 to 5 percent - by weight. Additives such as, for example,antifoamers, reodorants and antimicrobials may be added if desired.
The compositions of this invention can be frozen and thawed without destabiliziny. Further, the compositions can be heated to 50C without destabilizing and they can be stored for at least six months at room temperature without destabilizing.
Water immiscible solvents, i.e., solvents that are insoluble in water or only slightly soluble in water, such as, for example, hydrocarbon and chlorinated hydro-carhon solvents may be employed in amounts of from 0 to 75 percent by weight, based on total composition weight, to provicle low temperature stability and, when used, are preferably used in an amount of from 2 to 50 percent by weight. Aromatic hydrocarbon solvents such as, for example, the isomers of triethylbenzene, ethylmethyl-benzene, xylene, toluene, and ethylnaphthalenes are preferred, although other water immiscible solven-ts known to those skilled in the art may be employed. Mixtures of the above may also be utilized.
Anionic surfactants which are soluble in the toxicant-solvent-surfactant solution such as, for example, the alkali or alkaline earth metal salts of dodecylben-zenesulfonic acid, are employed in amounts of from 5 to 50 percent by weight, preferably in amounts of from 5 to 30 percent by weight, based on the total weight of the concentrate.
.
28,830A-F -2-In addi-tion to the Castor Oil based nonionic surfactant, which is critical to the present invention, and is advantageously employed in amounts of from 10 to 80 percent by weight, preferably in amounts of from 20 to 60 percent by weight, based on the total weight of the concentrate, one may employ other nonionic surfactants such as, for example, the alkylphenol/alkylene oxide condensation products taught in U.S. Patent 3,683,078, issued August 8, 1972, and the products obtained by reacting propylene glycol with propylene oxide followed by ethylene oxide to molecular weight of 2,000 to 3,000 or more.
The Castor Oil based nonionic surfactant pre-ferably contains from 5 to 55 moles of ethylene oxide chemically combined with each mole of Castor Oil and advantageously contains from 30 to 50 moles of ethylene oxide per mole of Castor Oil.
The stable toxicant compositions of this invention advantageously comprise from 1 to 50 percent by weight, based on total composit;ion, of the toxicant which is, preferably, pyrethrin, a synthetic pyrethroid, a thiophosphate ester or a carbamic acid ester.
.
When employing a solvent the toxicant/solvent ratio may be from 10:1 to 1:10 on a weight basis. The preferred ratio is from 10:1 to 2:1.
The synthetic pyrethroids which may be employed in the present invention include, for example, those having the formula 28,830A F -3-, ~. ~66~'3~
H Z
R-O-R'-C-O~C CH=C
"
wherein R and R' are lnterchangeably phenyl, pyridyl or substitued phenyl or pyridyl rings, X is hydrogen or cyano and Z and Z' may be the same or different and each is halo such as chloro, bromo or fluoro. Preferred pyrethroids are permethrin, decamethrin, dimethrin and cypremethrin.
Thiophosphate esters which may be employed in the present invention include, for example, coumo-phos, bromophos-ethyl, diazinon, dioxathion, chlor-pyrifos, ethionr malathion, oxinothiophos, beno~aphos, `~ 15 carbophenothion and phosmet which are descrlhed in The Wellcome Foundation Ltd.'s South Arican Patent Application 77/7609. The preferred thiophosphate esters are chlorpyrifos and chlorpyrifos-methyl.
Carbamic acid esters which may be;employed in the present invention include any of those known in ~- the art, preferably propoxur, carbaryl and carbofuran.
By "insecticidally active" is meant that the ~; toxicants are adapted to kill or control insects when applied to the habitats thereof by means generally employed by those skilled in the art.
The following examples, wherein all percen-tages are by weight unless~o~therwise indicated, further illustrate the present invention.
.~ ~
28,830A-F -4-..... .
:' 9 ~ ~
Example 1 Chlorpyrifos - 30 Tenneco~ 500/100 - 20 Casul~ 70HF - 18 5 T-Det~ N - 10.5 - 12 T-Det~ C-40 - 20 Tenneco~ 500/100 is a mixture of isomers of triethyl~
benæene, ethylmethylbenzene and o-xylene.
Casul~ 70HF is the calcium salt of dodecylbenzenesul-fonic acid.
T~Det~ N - 10.5 is the reaction product of nonylphenol with about 10 moles of ethylene oxide.
.~' .
T-Det~ C-40 is the reaction product of one mole of Castor Oil with 40 moles of ethylene oxide.
:
The ingredients were combined and stirred at 50C for about one-half hour forming a homogeneous stable composition. Dilution of 1.7 parts of this composition with 98.3 parts water followed by mild agitation provided a stable emulsion suitable for use.
Employing the a~ove procedure the following formulations wère prepared, in each case forming a stable composition and a stable emulsion when diluted.
28,830A-F -5 3 ~ ~
~6--Example 2 Chlorpyrifos 30 Tenneco~ 500/100 - 20 Casul~ 70HF- 15 T-Det~ C-40 - 35 ;'~
`; Exam~le 3 :;~
~: Chlorpyrios- 30 : Temleco~ 500/100 20 Casul~ 70HF- 12 19 T-Det~ EPO - 61 - 8 ~ T-Det~ C 40~ 30 ;~ T-Det~ EPO - 61 is the reaction product of propylene :~ glycol with propylene oxide and then ethylene oxide ~ to a molecular weight of about 2000.
, ~;~ 15 Example 4 Diazinon ~ 19.3 ~:~ 40~ P~rethrin Conc. - 4.8 . Piperonyl Butoxide - 5.8 Tenneco~ 500/100 - 20.0 Casul~ 70HF - 18.0 T-De.t3 N - 10.5 - 12.0 T-Det~ C-40 - 20.0 28,830A-F -6-.",.~
~.
.. .
Dilution of 5.2 parts of this composition with 94.8 parts water followed by mild agitation produced a stable emulsion suitable for use.
The addition of 3.3 percent by weight of the ~-cyano 3-phenoxybenzyl ester of 3~(2,2-dichloro-ethenyl)-2,2-dimethylcyclopropane carboxylic acid to 96.7 percent by weight of the mixture of Example 3 resulted in the formation of a stable composition and a stable emulsion when diluted.
The addition of 7 percent by weight of resmethrin to 93 percent by weight of the mixture of Example 3 also resulted in the formation of a stable composition and a stable emulsion when diluted.
The substitution of diazinon (87.9%) for chlorpyrifos in Examples 1 and 3 resulted in the formation of stable compositions and stable emulsions on dilution.
The substitution of chlorpyrifos-methyl for rhlorpyrifos in Example 3 resulted in the formation of a stable composition and a stable emulsion on dilution.
The substitution of malathion for chlor-pyrifos in E~ample 1 resulted in the formation of a stable composition and a stable emulsion on dilution.
The following formulations also provided compositions in solution form which were dispersible in water to form stable emulsions.
28,830A-F -7-.
' 6 ~ 5 ~
Example 5 Chlorpyrifos - 25 Tenneco~ 500/10010 Anionic* - 5 T-Det~ N - 10.5 - 20 T-Det~ C~40 - 40 *Diethanolamine salt of dodecylbenzenesulfonic acid.
.~
Exampl 6 Chlorpyrifos - 40 Tenneco~ 500/100 - 4 Anionic* - 8 T-Det~ EP0 61 - 20 ~ T~Det~ C-40 - 28 :~ *See Example 5 Example 7 Chlorpyrifos - 25 ~: Tenneco~ soa/loo - 15 :~ Anionic* - 5 : T-Det~ EP0-61 - 17 T-Det~ C-40 - 38 *Ninate 415 - K salt of an aryl al.kyl sulfonic acid.
,~ ~
28,830A-F -8-'' , ' Example 8 Propoxur - 5 Ethyl acetate - 45 Anionic* - 10 T-Det~) EPO-61 - 15 T-Det~ C-40 - 25 *See Example 5 28, 830l~-F -9-
Claims (18)
1. A stable toxicant composition which is in the form of a solution which is dispersible in water to form a stable emulsion and which comprises the fol-lowing components: (A) at least one insecticidally active toxicant, (B) at least one nonionic surfactant comprising a Castor Oil based nonionic surfactant and (C) at least one anionic surfactant; the proportions of said components being such that the composition is dispersible in water to form a stable emulsion which is insecticidally active.
2. Composition of Claim 1 wherein the toxi-cant comprises from 1 to 50 percent by weight thereof.
3. Composition of Claim 2 wherein the Castor Oil based nonionic surfactant comprises from 10 to 80 percent by weight thereof.
4. Composition of Claim 3 wherein the Castor Oil based nonionic surfactant contains from 5 to 55 moles of ethylene oxide chemically combined with each mole of Castor Oil.
28,830A-F -10-
28,830A-F -10-
5. Composition of Claim 3 wherein the anionic surfactant comprises from 5 to 50 percent by weight thereof.
6. Composition of Claim 1 which comprises, in addition, from 0 to 75 percent by weight of a water immiscible solvent.
7. Composition of Claim 2 wherein the toxicant is pyrethrin, a synthetic pyrethroid, a thiophosphate ester or a carbamic acid ester.
8. Composition of Claim 6 wherein the toxicant-solvent ratio is from 10:1 to 1:10.
9. Composition of Claim 5 which comprises from 5 to 30 percent by weight of an anionic surfactant.
10. Composition of Claim 1 which comprises, in addition, from O to 40 percent by weight of a non--Castor Oil based nonionic surfactant.
11. Composition of Claim 7 wherein the toxicant is chlorpyrifos.
12. Composition of Claim 1 which has been diluted with water to contain from 0.001 to 10 percent by weight toxicant.
13. Composition of Claim 12 wherein the toxicant is pyrethrin, a synthetic pyrethroid, a thiophosphate ester or a carbamic acid ester.
28,830A-F -11-
28,830A-F -11-
14. Composition of Claim 6 which has been diluted with water to contain from 0.001 to 10 percent by weight toxicant.
15. Composition of Claim 10 which has been diluted with water to contain from 0.001 to 10 percent by weight toxicant.
16. Composition of Claim 13 wherein the toxicant is chlorpyrifos.
17. Composition of Claim 16 wherein the Castor Oil based nonionic surfactant is present in an amount of from 20 to 60 percent by weight, based on the total weight of the concentrate.
18. Composition of Claim 17 wherein the Castor Oil based nonionic surfactant contains from 30 to 50 moles of ethylene oxide per mole of Castor Oil.
28,8304A-f -12-
28,8304A-f -12-
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000407906A CA1166956A (en) | 1982-07-23 | 1982-07-23 | Stable toxicant compositions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000407906A CA1166956A (en) | 1982-07-23 | 1982-07-23 | Stable toxicant compositions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1166956A true CA1166956A (en) | 1984-05-08 |
Family
ID=4123273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000407906A Expired CA1166956A (en) | 1982-07-23 | 1982-07-23 | Stable toxicant compositions |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1166956A (en) |
-
1982
- 1982-07-23 CA CA000407906A patent/CA1166956A/en not_active Expired
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| MKEX | Expiry |