Claims
- 1. A process for reducing foam in a surfactant matrix comprising adding a
- (i) a water insoluble siloxane alkoxylate of the formula:
- (CH.sub.3).sub.3 SiO(SiO(CH.sub.3).sub.2).sub.X (SiOCH.sub.3 R.sup.1).sub.Y Si(CH.sub.3).sub.3
- wherein X+Y=1 to 2, Y.gtoreq.1, R.sup.1 is an alkyleneoxide group of the formula C.sub.a H.sub.2a O(C.sub.3 H.sub.6 O).sub.z R.sup.2, wherein a=3 to 4, z is 1 to 15, R.sup.2 is hydrogen, a hydrocarbon radical of 1 to 4 carbons or acetyl; to (ii) a water soluble or dispersible surfactant matrix comprising at least one organosilicone surfactant.
- 2. A process according to claim 1 wherein Y=1 and a=3.
- 3. A process according to claim 1 wherein the at least one organosilicone surfactant of the surfactant matrix comprises a water soluble or dispersible trisiloxane alkoxylate.
- 4. A process according to claim 3 wherein the organosilicone surfactant of the surfactant matrix (ii) is a polyalkyleneoxide copolymer surfactant, containing between 10 and 90% polyoxyethylene, and between 90 and 10% polyoxypropylene.
- 5. A process according to claim 3 wherein the surfactant matrix (ii) additionally comprises a non-silicone, organic surfactant at a ratio of 1 to 99% by weight of the trisiloxane alkoxylate to 99 to 1% of the organic cosurfactant.
- 6. A process according to claim 1 where the siloxane alkoxylate (i) present from 0.1 wt % to 50 wt % and the surfactant matrix (ii) is present from 50 wt % to 99.9 wt %.
- 7. A process according to claim 6 wherein the siloxane alkoxylate (i) is post added to an aqueous solution of the surfactant matrix (ii).
- 8. A process according to claim 7 wherein the siloxane alkoxylate (i) is present in an aqueous solution of the surfactant matrix (ii) from 25 ppm to 1.0 wt %.
- 9. A composition comprising:
- (i) a water insoluble siloxane alkoxylate of the formula:
- (CH.sub.3).sub.3 SiO(SiO(CH.sub.3).sub.2).sub.X (SiOCH.sub.3 R.sup.1).sub.Y Si(CH.sub.3).sub.3
- wherein X+Y=1 to 2, Y.gtoreq.1, R.sup.1 is an alkyleneoxide group of the formula C.sub.a H.sub.2a O(C.sub.3 H.sub.6 O).sub.2 R.sup.2 wherein a=3 to 4, z is 1 to 15, R.sup.2 is hydrogen, a hydrocarbon radical of 1 to 4 carbons or acetyl; and
- (ii) a water soluble or dispersible surfactant matrix comprising at least one organosilicone surfactant.
- 10. A composition according to claim 9 wherein the composition is essentially free of additional foam control agent.
- 11. A composition according to claim 9 wherein the surfactant matrix (ii) additionally comprises a non-silicon organic cosurfactant.
- 12. A composition according to claim 11 wherein the organic cosurfactant has a hydrophobe of less than or equal to ten carbons in the main chain thereof.
- 13. A composition according to claim 9 additionally comprising a pesticide.
- 14. A composition according to claim 9 which further comprises silica and which is essentially free of additional foam control agent other than silica.
- 15. A composition according to claim 9 additionally comprising water.
- 16. The composition according to claim 15 additionally comprising silica.
Parent Case Info
This application claims priority from U.S. Provisional Application No. 60/012,017, filed Feb. 21, 1996. This application is a continuation-in-part of patent application Ser. No. 08/449,452 filed May 24, 1995, now U.S. Pat. No. 5,658,852, which is a divisional of application Ser. No. 08/135,916, filed Oct. 13, 1993, now U.S. Pat. No. 5,561,099.
US Referenced Citations (11)
Foreign Referenced Citations (2)
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0 459 512 A2 |
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0 648 413 A1 |
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Divisions (1)
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Number |
Date |
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Parent |
135916 |
Oct 1993 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
449452 |
May 1995 |
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