Claims
- 1. A concentrated, essentially homogeneous, low-sudsing liquid detergent composition comprising:
- (a) from about 10% to about 50% by weight of a non-ionic surfactant;
- (b) from about 10% to about 50% by weight of an anionic surfactant, the total amount of surfactant being more than about 30% and the ratio of nonionic surfactant to anionic surfactant being within the range of from about 1:8 to about 8:1 based on the free acid form of the anionic surfactant; and
- (c) an effective amount of self-emulsifiable silicone suds controlling agent comprising a silicone suds controlling agent and an emulsifier for said silicone suds controlling agent.
- 2. The composition of claim 1 containing from about 1% to about 45% by weight of the composition of a solvent selected from the group consisting of water and water/alcohol mixtures.
- 3. The composition of claim 2 wherein the alcohol is ethanol.
- 4. The composition of claim 1 wherein the nonionic detergent is the condensation product of an alcohol containing from about 8 to about 22 carbon atoms and from 2 to 20 moles of ethylene oxide per mole of alcohol.
- 5. The composition of claim 4 wherein the alcohol contains from about 8 to about 18 carbon atoms, there are from 2 to 12 moles of ethylene oxide, and the HLB of the nonionic detergent is from about 8 to about 15.
- 6. The composition of claim 1 wherein the anionic detergent is selected from the group consisting of alkyl sulfates, alkyl benzene sulfonates, alkyl sulfonates, alkyl polyethoxylate sulfates containing 1 to 10 moles of ethyleneoxide per molecule, and mixtures thereof, said alkyl and alkyl benzene groups containing from 6 to about 22 carbon atoms and the cations of said anionic detergent being selected from the group consisting of sodium, potassium, ammonium, monoethanolammonium, diethanolammonium, triethanolammonium, calcium and magnesium cations.
- 7. The composition of claim 6 wherein the nonionic detergent is the condensation product of an alcohol containing from about 8 to about 22 carbon atoms and from 2 to about 20 moles of ethylene oxide per mole of alcohol.
- 8. The composition of claim 1 wherein the self-emulsifiable silicone suds controlling agent is present in an amount of from about 0.01% to about 5% by weight and comprises an emulsifier which is a siloxane containing a polyoxyalkylated moiety.
- 9. The composition of claim 8 wherein the self-emulsifiable silicone suds controlling agent is present in an amount from about 0.05% to about 1% and the emulsifier has the formula:
- R.sub.a SiY.sub.4-a
- wherein a is 0 or an integer from 1 to 3; R is selected from the group consisting of (a) alkyl groups containing from one to about 30 carbon atoms, (b) groups having the formula --R'--(OR').sub.b OR" wherein R' is an alkylene group containing from one to about six, preferably from two to four, carbon atoms, b has a value of from 1 to about 100; and R" is a capping group which can be selected from the group consisting of hydrogen, alkyl, aryl, alkaryl, aralkyl or alkenyl groups containing up to 20 carbon atoms; acyl groups containing up to 20 carbon atoms, sulfate, sulfonate, phosphate, phosphonate, borate, or isocyanate groups, or mixtures thereof; and Y is a group having the formula ##STR5## wherein R has the formula given hereinbefore, and c has a value from 1 to 200, preferably from about 10 to about 100; and wherein at least one R group in the compound has the aforesaid formula
- [--R' (OR').sub.b --R"]
- 10. The composition of claim 9 in which the selfemulsifiable silicone suds controlling agent comprises a material of the formula ##STR6## wherein x is from about 20 to about 2,000 and R and R' are each selected from the group consisting of methyl, ethyl, propyl, butyl, and phenyl.
- 11. The composition of claim 9 in which the selfemulsifiable silicone suds controlling agent comprises a polydimethylsiloxane having a molecular weight of from about 200 to about 200,000.
- 12. The composition of claim 9 in which the selfemulsifiable silicone suds controlling agent comprises an alkylated silicone/silica mixture in which the ratio of silicone to silica is from about 19:1 to 1:2, the particle size of the silica is not more than 100 millimicrons, the specific surface area of the silica exceeds 50m.sup.2 /g., and up to 15% by weight of the silicone can be bound to said silica.
- 13. The composition of claim 12 in which the silicone is a polydimethylsilicone.
- 14. The composition of claim 9 in which the selfemulsifiable silicone suds controlling agent comprises a mixture consisting essentially of:
- (a) from about 10 parts to about 100 parts by weight of a polydimethylsiloxane fluid having a viscosity in the range from 20 cs. to 1500 cs. at 25.degree. C;
- (b) 5 to 50 parts by weight of a siloxane resin composed of (CH.sub.3).sub.3 SiO.sub.1/2 units and SiO.sub.2 units in which the ratio of the (CH.sub.3).sub.3 SiO.sub.1/2 units to the SiO.sub.2 units is within the range of from 0.6/1 to 1.2/1; and
- (c) 1 to 10 parts by weight of a silica aerogel.
- 15. The composition of claim 9 wherein the said self-emulsifiable silicone suds controlling agent comprises at least 40% of a mixture of silicone suds controlling agents comprising, by weight of the agent, from 5% to 45% polydimethylsiloxane, from 0.05% to 5% silica, and a minor amount of a polydimethylsiloxane resin.
- 16. The composition of claim 9 comprising from about 0.1% to about 0.6% of the self-emulsifiable silicone suds controlling agent.
- 17. The composition of claim 1 wherein the emulsifier for the suds controlling agent is a polyethoxylated fatty acid in which said acid contains from 8 to 22 carbon atoms and in which there are from about 300 to about 2,000 ethoxy groups per molecule.
- 18. The composition of claim 17 in which the selfemulsifiable silicone suds controlling agent comprises a material of the formula ##STR7## wherein x is from about 20 to about 2,000 and R and R' are each selected from the group consisting of methyl, ethyl, propyl, butyl, and phenyl.
- 19. The composition of claim 17 in which the selfemulsifiable silicone suds controlling agent comprises an alkylated silicone/silica mixture in which the ratio of silicone to silica is from about 19:1 to 1:2, the particle size of the silica is not more than 100 millimicrons, the specific surface area of the silica exceeds 50m.sup.2 /g., and up to 15% by weight of the silicone can be bound to said silica.
- 20. The composition of claim 17 in which the selfemulsifiable silicone suds controlling agent comprises a mixture consisting essentially of:
- (a) from about 10 parts to about 100 parts by weight of a polydimethylsiloxane fluid having a viscosity in the range from 20 cs. to 1500 cs. at 25.degree. C;
- (b) 5 to 50 parts by weight of a siloxane resin composed of (CH.sub.3).sub.3 SiO.sub.1/2 units and SiO.sub.2 units in which the ratio of the (CH.sub.3).sub.3 SiO.sub.1/2 units to the SiO.sub.2 units is within the range of from 0.6/1 to 1.2/1; and
- (c) 1 to 10 parts by weight of a silica aerogel.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of our copending application for LIQUID DETERGENT COMPOSITIONS, Ser. No. 622,305, filed Oct. 14, 1974, now abandoned.
US Referenced Citations (14)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1,373,903 |
Nov 1974 |
UK |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
622305 |
Oct 1975 |
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