Method of forming an antifoam granule comprising a silicone polyether

Patent metadata

Field	Value
Publication number	US-9994795-B2
Application number	US-201414909333-A
Country	US
Kind code	B2
Filing date	Jul 24, 2014
Priority date	Aug 13, 2013
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

An antifoam granule includes a carrier and an antifoam compound deposited on the carrier. The antifoam granule is formed using a method that includes providing an emulsion and contacting the emulsion with a carrier to deposit the antifoam compound on the carrier and form the antifoam granule. The emulsion includes an oil phase, an aqueous phase, and a silicone polyether. The oil phase includes an antifoam compound. The antifoam compound includes a hydrophobic fluid and a hydrophobic filler dispersed in the hydrophobic fluid. The aqueous phase includes a binder and water. The emulsion is formed using a method that includes combining the oil phase, the aqueous phase, and the silicone polyether to form the emulsion. The antifoam granule is also utilized in a method of facilitating rinsing of a detergent from a substrate that includes applying the detergent, including the antifoam granule, to the substrate and rinsing the substrate.

First claim

What is claimed is:

1. A method of forming an antifoam granule comprising a carrier and an antifoam compound deposited on the carrier, said method comprising the steps of:
I) providing an emulsion comprising;
A) an oil phase comprising an antifoam compound, said antifoam compound comprising;
i) a hydrophobic fluid having a surface tension of from 23 to 40 mN/m, and
ii) a hydrophobic filler dispersed in said hydrophobic fluid i);

B) an aqueous phase comprising;
iii) a binder, and
iv) water; and

C) a silicone polyether; and

II) contacting the emulsion with the carrier to deposit the antifoam compound on the carrier and form the antifoam granule;
wherein the antifoam granule is free of organosilicon resin.

2. The method of claim 1 wherein said step of contacting II) is further described as II) spraying the emulsion on the carrier to deposit antifoam compound on the carrier and form the antifoam granule.

3. The method of claim 1 wherein the hydrophobic fluid i) has a surface tension of from 27 to 40 mN/m.

4. The method of claim 1 , wherein the silicone polyether C) is present in the emulsion in an amount of from 1 to 20 parts by weight per 100 parts by weight of the emulsion.

5. The method of claim 1 , wherein the silicone polyether C) is chosen from:

and combinations thereof, wherein R 6 is a monovalent hydrocarbon or halogenated hydrocarbon group, Q is R 6 or G, j has a value of 1 to 150, k has a value of 0 to 400 and G is a polyoxyalkylene group having a formula chosen from:

and combinations thereof, wherein R 7 is a divalent hydrocarbon group having 1 to 20 carbon atoms, m has an average value of about 1 to 50, n has an average value of 1 to about 50 and Z is chosen from hydrogen, an alkyl radical having 1 to 6 carbon atoms and an acyl group having 2 to 6 carbon atoms.

6. The method of claim 1 wherein the hydrophobic fluid i) is chosen from a silicone fluid, and organic fluid, and combinations thereof.

7. The method of claim 6 wherein the hydrophobic fluid i) is the silicone fluid and wherein the silicon fluid is chosen from the group of alkylsiloxanes having an alkyl group having from 12 to 14 carbon atoms, arylsiloxanes, arylalkylsiloxanes, a siloxane that is the reaction product a methyl hydrogen (MeH) siloxane, an alkylmethacrylate having an alkyl group having 8 to 30 carbon atoms, and an alkene having 8 to 30 carbon atoms, and combinations thereof.

8. The method of claim 1 wherein the binder iii) is a water soluble or water-dispersible polymer.

9. The method of claim 1 wherein the oil phase A) is present in an amount of from 20 to 80 and the aqueous phase B) is present in an amount of from 10 to 70 parts by weight per 100 parts by weight of the emulsion.

10. The method of claim 1 wherein the hydrophobic fluid i) is present in the oil phase A) in an amount of from 75 to 99 parts by weight per 100 parts by weight of the oil phase A).

11. The method of claim 1 wherein the hydrophobic filler ii) is present in the oil phase A) in an amount of from 0.5 to 50 parts by weight per 100 parts by weight of the hydrophobic fluid i).

12. The method of claim 1 wherein the binder iii) is present in the aqueous phase B) in an amount of from 20 to 60 parts by weight per 100 parts by weight of the aqueous phase B).

13. The method of claim 1 wherein the carrier is chosen from the group of silicates and aluminasilicates such as zeolites, magnesium silicate, calcium silicate, sodium silicate, mica, bentonite, diatomite, sepiolite, natural or modified clays, talc, neat or treated silica, carbohydrates, lactose, dextrose, maltodextrin, alginate, chitin, chitosan, soda ash, starch, wood flour, cellulose, cellulose derivatives, sodium carboxymethylcellulose, calcium sulfate, sodium sulfate, magnesium sulfate, calcium carbonate, sodium acetate, sodium bicarbonate, sodium perborate, sodium citrate, sodium carbonate, phosphates, sodium tripolyphosphate, or combinations thereof.

14. An antifoam granule comprising a carrier and an antifoam compound deposited on said carrier, wherein said antifoam granule is formed by the method of claim 1 .

15. A method of facilitating rinsing of a detergent from a substrate, said method comprising the steps of:
I) applying the detergent to the substrate; and
II) rinsing the substrate;
wherein the detergent comprises an antifoam granule formed by the method of claim 1 .

16. The method of claim 1 , wherein said silicone polyether C) is present in said emulsion in an amount of from 1 to 10 parts by weight per 100 parts by weight of said emulsion.

17. A method of claim 1 wherein the step of providing comprises mechanically agitating the oil phase A), the aqueous phase B), and the silicone polyether C).

18. A method of claim 1 , wherein the step of providing comprises applying shear to the oil phase A), the aqueous phase B), and the silicone polyether C).

Assignees

• Dow Corning
• Dow Silicones Corp

Inventors

• Colson Anick
• Gallez Laurence
• Simon Christel Manette
• Ziolkowski Nicolas

Classifications

• B01D19/0404

  characterised by the nature of the chemical substance · CPC title

• C11D3/0026 Primary

  Low foaming or foam regulating compositions · CPC title

• C11D3/3749

  Polyolefins; Halogenated polyolefins; Natural or synthetic rubber; Polyarylolefins or halogenated polyarylolefins · CPC title

• C11D3/3738

  Alkoxylated silicones · CPC title

• B01D19/0409 Primary

  compounds containing Si-atoms · CPC title