Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2002-09-20
2004-11-09
Ogden, Necholus (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S277000, C510S283000, C510S336000, C510S351000, C510S403000, C510S424000, C510S426000, C510S491000
Reexamination Certificate
active
06815409
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to gel detergent compositions which pile-up on a surface, upon dispensing, to minimize the spreading of the gel to a substantially larger area.
BACKGROUND OF THE INVENTION
Thickened or gel laundry products are preferred by many consumers, over either powder or liquid detergents. Gels provide the advantages of liquid detergents, but also can be used for pretreatment of fabrics, obviating the necessity for purchase of a separate pre-treatment product.
Gel detergents have been described. See, for instance, WO 99/06519 and WO 99/27065, Klier et al. (U.S. Pat. No. 5,538,662), GB 2 355 015, Lance-Gomez et al. (U.S. Pat. No. 5,820,695), Hawkins (U.S. Pat. No. 5,952,285), Akred et al. (U.S. Pat. No. 4,515,704), Farr et al. (U.S. Pat. No. 4,900,469).
Since gels are frequently also used as pretreaters, the desired property of gels is “pile-up,” i.e. the property of a gel to pile up on the surface of the fabric, rather than spreading to a substantially larger area. The gels that can pile up are less messy to use and provide better stain removal, since more detergent is concentrated on the desired area of fabric (e.g., the spot).
SUMMARY OF THE INVENTION
The present invention includes a gel detergent composition which piles up upon dispensing, the composition comprising:
(a) from about 10% to about 35%, by weight of the composition, of a surfactant,
(b) from about 0.1 to about 5%, by weight of the composition; of a non-neutralized fatty acid;
(c) from about 50 to about 85% of water;
(d) wherein the total of anionic surfactants selected from soap, linear alkyl benzene sulfonic acid, primary and secondary alkyl sulfates is more than 50% of total surfactant level.
Surprisingly, it has been discovered, as part of the present invention, that by employing non-neutralized fatty acid in a specific amount, depending on the total surfactant level, a shear-thinning, lamellar gel, with the desired pouring viscosity, can be attained at total surfactant level less than or equal to 35%, preferably less than 25%, most preferably less than 20%. Furthermore, it has been discovered that when the total level of anionic surfactants selected from soap, linear alkyl benzene sulfonic acid, primary and secondary alkyl sulfates is more than 50% of total surfactant level, gel wit the desired pile-up proiperty may be obtained.
The inventive product offers an advantage of laundry pre-treater and a detergent in a single product.
REFERENCES:
patent: 4515704 (1985-05-01), Akred et al.
patent: 4801395 (1989-01-01), Chazard et al.
patent: 4900469 (1990-02-01), Farr et al.
patent: 5538662 (1996-07-01), Klier et al.
patent: 5820695 (1998-10-01), Lance-Gomez et al.
patent: 5952285 (1999-09-01), Hawkins
patent: 5952286 (1999-09-01), Puvvada et al.
patent: 5972869 (1999-10-01), Cao et al.
patent: 6001795 (1999-12-01), Charlez et al.
patent: 6077816 (2000-06-01), Puvvada et al.
patent: 6399563 (2002-06-01), Durbut et al.
patent: 2003/0171231 (2003-09-01), Shana'a et al.
patent: 832 964 (1998-04-01), None
patent: 2 351 979 (2001-01-01), None
patent: 2 355 015 (2001-04-01), None
patent: 99/06519 (1999-02-01), None
patent: 99/27065 (1999-06-01), None
patent: 03/060050 (2003-07-01), None
International Search Report, Application No. PCT/EP 03/09012 dated Aug. 13, 2003, 4 pages.
International Search Report, Application No. PCT/EP 03/09386 dated Aug. 22, 2003, 6 pages.
International Search Report, Application No. PCT/EP 03/08952 dated Aug. 13, 2003, 6 pages.
Co-pending Application: Applicant: Hsu et al., Filed: Sep. 20, 2002.
Co-pending Application: Applicant: Hsu et al., Filed: Sep. 20, 2002.
Co-pending Application: Applicant: Hsu et al., Filed: Sep. 20, 2002.
Boudou Agnes
Ebert Charles
Hsu Feng-Lung Gordon
Lee Kwang H
Vogel Ronald Frederick
Mitelman Rimma
Ogden Necholus
Unilever Home & Personal Care USA , division of Conopco, Inc.
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