US4303642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable insecticide containing latexes, method of making and method of distributing insecticide
Assignee: Dow Chemical Co
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Filing: 1980-05-07
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Granted: 1981-12-01
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Expires: 2000-05-07
Abstract
Abstract Stable latexes comprising polymers containing chlorpyrifos or chlorpyrifos-methyl insecticide are prepared by mixing the latex with the insecticide at temperatures of 40° to less than 100° C., with stirring. The polymer granules protect the dissolved insecticide from early leaching or decomposition and prolong the effect and soil penetration of the toxicant.
Inventors
- 👤 Donald A. Kangas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:34
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/08; A01N25/10; A01N57/00; A01N57/10; A01N57/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
69 words
A stable polymer latex comprising chlorpyrifos or chlorpyrifos-methyl dissolved in the polymeric solids of the latex, said polymeric solids comprising polymers and copolymers of styrene, alkyl styrenes, isoprene, butadiene, acrylonitrile, lower alkyl acrylates, vinyl chloride, vinylidene chloride and α,β-ethylenically unsaturated carboxylic acids, including polymers containing three or more different monomer species copolymerized therein, the sizes of the polymeric particles being in the range of from 0.03 to 20 microns.
Claim 2
Dependent Claim
69 words
A stable polymer latex comprising chlorpyrifos or chlorpyrifos-methyl dissolved in the polymeric solids of the latex, said polymeric solids comprising polymers and copolymers of styrene, alkyl styrenes, isoprene, butadiene, acrylonitrile, lower alkyl acrylates, vinyl chloride, vinylidene chloride and α,β-ethylenically unsaturated carboxylic acids, including polymers containing three or more different monomer species copolymerized therein, the sizes of the polymeric particles being in the range of from 0.03 to 20 microns.
Claim 3
Dependent Claim
17 words
Latex of claim 1 wherein the polymeric solids comprise styrene or an alkylstyrene as a substantial component.
Claim 4
Dependent Claim
18 words
Latex of claim 1 wherein the polymer particles are in the size of from 0.1 to 10 microns.
Claim 5
Dependent Claim
18 words
Latex of claim 3 wherein the polymer particles are in the size of from 0.1 to 1.0 microns.
Claim 6
Dependent Claim
41 words
Latex of claim 1 comprising 30 to 50 weight percent water, 10 to 50 weight percent chlorpyrifos or chlorpyrifos-methyl, 20 to 40 weight percent polymer solids, 0 to 5 weight percent anionic surfactant and 0 to 10 weight percent nonionic surfactant.
Claim 7
Dependent Claim
16 words
Latex of claim 5 wherein the polymer comprises styrene or an alkylstyrene as a substantial component.
Claim 8
Dependent Claim
84 words
Method of making a stable aqueous insecticide dispersion which comprises adding chlorpyrifos or chlorpyrifos-methyl to a polymer latex wherein the polymer solids comprise polymers and copolymers of styrene, alkyl styrenes, isoprene, butadiene, acrylonitrile, lower alkyl acrylates, vinyl chloride, vinylidene chloride and α,β-ethylenically unsaturated carboxylic acids, including polymers containing three or more different monomer species copolymerized therein, the sizes of the polymeric particles being in the range of from 0.03 to 20 microns, with stirring at a temperature of 40° to less than 100° C.
Claim 9
Dependent Claim
84 words
Method of making a stable aqueous insecticide dispersion which comprises adding chlorpyrifos or chlorpyrifos-methyl to a polymer latex wherein the polymer solids comprise polymers and copolymers of styrene, alkyl styrenes, isoprene, butadiene, acrylonitrile, lower alkyl acrylates, vinyl chloride, vinylidene chloride and α,β-ethylenically unsaturated carboxylic acids, including polymers containing three or more different monomer species copolymerized therein, the sizes of the polymeric particles being in the range of from 0.03 to 20 microns, with stirring at a temperature of 40° to less than 100° C.
Claim 10
Dependent Claim
16 words
Method of claim 7 wherein the polymer comprises styrene or an alkylstyrene as a substantial component.
Claim 11
Dependent Claim
40 words
Method of distributing chlorpyrifos or chlorpyrifos-methyl for the control of soil dwelling insects which comprises applying the chlorpyrifos or chlorpyrifos-methyl to the soil in the form of an aqueous dispersion of polymer particles containing the chlorpyrifos or chlorpyrifos-methyl dissolved therein.
Claim 12
Dependent Claim
40 words
Method of distributing chlorpyrifos or chlorpyrifos-methyl for the control of soil dwelling insects which comprises applying the chlorpyrifos or chlorpyrifos-methyl to the soil in the form of an aqueous dispersion of polymer particles containing the chlorpyrifos or chlorpyrifos-methyl dissolved therein.
Claim 13
Dependent Claim
12 words
Method of claim 9 wherein the insect is the corn root worm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |