Plant protecting and regulating compositions – Plant growth regulating compositions – Organic active compound containing
Reexamination Certificate
1998-02-20
2001-04-24
Kulkosky, Peter F. (Department: 1615)
Plant protecting and regulating compositions
Plant growth regulating compositions
Organic active compound containing
C504S118000, C424S405000
Reexamination Certificate
active
06221811
ABSTRACT:
BACKGROUND OF THE INVENTION
Many pesticides require the addition of an adjuvant to the spray mixture to provide wetting and spreading on foliar surfaces. Often that adjuvant is a surfactant, which can perform a variety of functions, such as increasing spray droplet retention on difficult to wet leaf surfaces, or to provide penetration of the herbicide into the plant cuticle. These adjuvants are either provided as a component in an adjuvant formulation or used as an additive in herbicide formulations.
Trisiloxane alkoxylates are well known for their ability to provide enhanced spreading and wetting properties to pesticide spray solutions, relative to more commonly used organic based (nonsilicone) surfactants. At times it is necessary to include other surfactants in the spray mixture along with the trisiloxane alkoxylate. Unfortunately, the presence of many classes of cosurfactants interfere with the performance of the trisiloxane alkoxylate.
SUMMARY OF THE INVENTION
The present invention teaches a surfactant composition of nonionic siloxane alkoxylates and aminoalkyleneoxide surfactant, and their use as adjuvants, for pesticides. The present invention provides a surfactant composition that gives enhanced wetting of spray solutions on difficult to wet surfaces, such as waxy plants, and enhance the uptake of agrichemicals into plants as compared to more commonly used blends of polyalkyleneoxide/trisiloxane alkoxylate surfactants.
The composition of the present invention is useful as a tank side additive, or as a component in a herbicide formulation. In addition the compositions of the present invention are useful as adjuvants for other pesticides, such as, fungicides, insecticides, plant growth regulators, acaracides and the like.
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides novel surfactant compositions that are useful as adjuvants for pesticides. The compositions of the present invention provide enhanced spray coverage relative to conventional wetting agents. In addition, these products provide a low aqueous surface tension (<23 mN/m at 0.1 wt %), which is necessary and desirable for spreading of pesticide solutions.
Composition
The compositions of the present invention include a nonionic siloxane alkoxylate and an aminopolyalkyleneoxide.
a. Nonionic Siloxane Alkoxylate
The siloxane alkoxylate has the general formula:
R
5
Me
2
SiO[Me
2
SiO]
t
[MeSi(Q)O]
g
SiMe
2
R
5
wherein f=0 to 1, preferably 0, g=1 to 2, preferably 1, Q=C
d
H
2d
O(C
2
H
4
O)
t
(C
3
H
6
O)
w
R
4
, d=2 to 4, preferably 3, t=3 to 12, preferably 4 to 8, w=0 to 8, providing that when w is >0, (t+w) is preferably between 5 and 12. R
4
is hydrogen, acetyl or a hydrocarbon radical between 1 and 4 carbon atoms. R
5
is Q, alkyl of one to four carbons or a hydroxyl group. The preferred nonionic siloxane alkoxylates are trisiloxane alkoxylates, which have f=0, g=1, d=3, t=4 to 8, w=0, R
4
is H or Me.
b. Aminopolyalkyleneoxide
The compositions of the present invention also contain aminopolyalkyleneoxide surfactants which do not detract from the efficacy of the composition. Examples include alkoxylated diamines of the formula (H(R
T
)
T
)
2
NC
2
H
4
N((R
T
)
T
H)
2
wherein R
T
denotes alkoxy groups containing 2 or 3 carbon atoms each, and the subscript T is selected so that the molecular weight of the alkoxylated diamine is 1,000 to 15,000. Preferably, ethoxy units comprise 10 to 90% and more preferably 20 to 50% of the polyalkoxylate chains.
The ratio of the aminopolyalkyleneoxide to the nonionic siloxane alkoxylate is in the range of 99:1 and 1:99 by weight.
The compositions of the present invention also optionally include ingredients for use herein which are pesticides, especially acid functional ones, e.g., compounds that contain at least one carboxylic, sulfonic or phosphonic acid group which is in the form of the free acid or a salt or ester thereof. The term pesticide means any compound used to destroy pests, e.g., insecticides, rodenticides, fungicides, and herbicides, and is also used herein to include plant growth regulatory compounds. Illustrative examples of pesticides which can be employed include, but are not limited to, growth regulators, photosynthesis inhibitors, pigment inhibitors, mitotic disrupters, lipid biosynthesis inhibitors, cell wall inhibitors, and cell membrane disrupters. The amount of pesticide employed in compositions of the invention varies with the type of pesticide employed. More specific examples of pesticide compounds that can be used with the compositions of the invention are: phenoxy acetic acids, phenoxy propionic acids, phenoxy butyric acids, benzoic acids, triazines and s-triazines, substituted ureas, uracils, bentazon, desmedipham, methazole, phenmedipham, pyridate, amitrole, clomazone, fluridone, norflurazone, dinitroanilines, isopropalin, oryzalin, pendimethalin, prodiamine, trifluralin, glyphosate, sulfonylureas, imidazolinones, cyclohexanediones, aryloxyphenoxypropanoates, dichlobenil, isoxaben, and bipyridylium compounds.
Manufacture
The nonionic siloxane alkoxylates, aminoalkyleneoxide surfactants, and pesticides are commercially available and their manufacture is known in the art.
Use
The nonionic siloxane alkoxylates, aminoalkyleneoxide surfactants blends of the present invention, primarily are intended for use in the agricultural field as adjuvants for pesticide, especially acid functional pesticides, containing aqueous end-use formulations. The compositions of the present invention are added directly to a spray tank along with an acid functional pesticide, or as part of a pesticide formulation. They are used in effective amount, that is, an amount which is sufficient to cause the pesticide to function effectively in the formulation. When used as a tankside additive, the compositions of this invention should be present at weight concentrations between 0.01% and 5.0%, preferably between 0.025% and 0.5%, but in “in can” formulations, the compositions of the present invention may be present at concentrations that will deliver between 0.01% and 5.0% to the final use dilution, preferably between 0.025% and 0.5%, of the final use dilution.
The novel nonionic siloxane alkoxylates/aminoalkyleneoxide surfactant compositions of the present invention may also be used generally as surface active agents in aqueous formulation where there is an acid functionalized component, including, but not limited to, surfactants, wetting agents and softeners for textiles, as flowing and leveling agents in coatings, in hair care products and creams for personal care applications and as anti-static agents and softeners for laundry products. Other uses for the present composition will be obvious to those of skill in the art.
REFERENCES:
patent: 5104647 (1992-04-01), Policello
patent: 5504054 (1996-04-01), Policello
patent: 5558806 (1996-09-01), Policello
patent: 5561099 (1996-10-01), Murphy
patent: 5658851 (1997-08-01), Murphy
patent: 5674514 (1997-10-01), Hasslin
patent: 0112593 (1984-07-01), None
patent: 0483095 (1992-04-01), None
patent: 8912394 (1989-12-01), None
Chemical Abstract—52503-47-6.
Chemical Abstract—106:191231.
Chemical Abstract—106:80405.
chemical Abstract—103:89334.
Chemical Abstract—103:66794.
Chemical Abstract—84:43919.
Chemical Abstract—101:67823.
Chemical Abstract—99:83744.
Chemical Abstract—97:74345.
Policello George
Stevens Peter
Crompton Corporation
Kulkosky Peter F.
Ma Shirley S.
LandOfFree
Siloxane nonionic blends useful in agriculture does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Siloxane nonionic blends useful in agriculture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Siloxane nonionic blends useful in agriculture will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2435807