Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2001-12-21
2002-10-08
Delcotto, Gregory (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S303000, C510S304000, C510S311000, C510S312000, C510S370000, C510S376000, C510S394000, C510S500000, C510S508000, C540S123000, C540S128000
Reexamination Certificate
active
06462008
ABSTRACT:
FIELD OF THE INVENTION
The present invention is in the field of laundry detergents having photobleach systems comprising hydrophobic phthalocyanines and water-soluble polymers. The field includes preparations and methods of use of the compositions to successfully deposit the photobleaches on fabrics despite presence of detersive surfactants which tend to remove these photobleaches.
BACKGROUND OF THE INVENTION
Delivery of photobleaching benefits through laundry detergents is technically difficult. Even when a photobleach is free from multiple issues such as overhueing, poor photophysics, localized staining tendency, unacceptable color, uneven deposition etc., its inclusion and successful delivery to fabrics from a composition which contains detersive surfactants is problematic.
Unlike many other technical fields in which photoactive compounds may easily be used, the field of laundry detergents involves surfactants designed to aggressively clean fabrics, to suspend soil, and not to deposit materials such as photobleaches. Even when many water-soluble polymers and surfactants are known to be useful in detergent compositions, there remains appreciable difficulty to select and combine hydrophobic photobleaches, polymers and surfactants appositely so that the resulting detergent composition delivers a properly performing photobleach system with a minimum of the aforementioned issues, to the fabrics being laundered.
Historically, in efforts to arrive at directly formulatable photobleaches, photobleach types have been developed which include charged groups and/or water-soluble features, such as in the sulfonated zinc phthalocyanines. Since these are charged, water-soluble materials, they differ from non-charged, water-insoluble materials, especially with respect to their interaction with common anionic and nonionic detersive surfactants.
Most recently, certain hydrophobic, non-charged photobleach types have been developed. These include non-charged photobleaches disclosed in WO 98/32832 A, WO 98/32829 A, WO 98/32828 A, WO 98/32827 A, WO 98/32826 A, WO 98/32825 A, and WO 98/32824 A all published Jul. 30, 1998; and WO 97/05203 A and WO 97/05202 published Feb. 13, 1997. Such materials have superior properties as photobleaches. They can, for example, include superoxide generation, or be relatively low-hueing, or can be particularly useful on hydrophobic soils.
It is an object of the present invention to provide improved photobleach delivery systems, especially types wherein the photobleach is hydrophobic; novel laundry detergent compositions comprising such systems; processes for preparing the photobleach delivery systems and/or the final detergent compositions; and methods of use of the formed detergent compositions.
These and other objects are accomplished herein as will be seen from the following disclosure.
BACKGROUND ART
See for example U.S. Pat. No. 5,872,248; U.S. Pat. No. 5,484,778; U.S. Pat. No. 5,763,602; Derwent 93-032275; EP-284,370 A; EP-296,876; EP-366,440; EP-484,027 A; EP 538,228 A; EP-596,184; GB 2,260,996; GB 2,279,657; GB 2,313,122; JP 3285998 (See Derwent 9-038692); JP 51/39044; JP 52/55339; JP 60/48047; JP 61/57536; JP 7292398 A (see Derwent 96-017535); KR 97-61275; KR 9102515 (see Derwent 92-321309); U.S. Pat. No. 3,860,484; U.S. Pat. No. 4,166,718; U.S. Pat. No. 4,209,417; U.S. Pat. No. 4,304,719; U.S. Pat. No. 4,368,053; U.S. Pat. No. 4,800,188; U.S. Pat. No. 4,806,514; U.S. Pat. No. 4,911,919; U.S. Pat. No. 5,135,717; U.S. Pat. No. 5,280,183; U.S. Pat. No. 5,346,670; U.S. Pat. No. 5,437,929; U.S. Pat. No. 5,482,514; U.S. Pat. No. 5,484,778; U.S. Pat. No. 5,561,106; U.S. Pat. No. 5,585,483; U.S. Pat. No. 5,665,689; U.S. Pat. No. 5,665,875; U.S. Pat. No. 5,679,661; U.S. Pat. No. 5,733,560; U.S. Pat. No. 5,824,800; WO 91/18006; WO 91/18007; WO 92/01753; WO 92/01753; WO 94/22960; WO 95/06688; WO 95/24267; WO 95/31526; WO 96/29367; WO 97/05202; WO 97/05202; WO 97/05203; WO 97/10811; WO 98/14521; WO 98/25455; WO 98/32827; WO 98/32832; and WO 98/44052.
See also U.S. Pat. No. 3,094,536, Jun. 18, 1963; U.S. Pat. No. 3,927,967, Dec. 23, 1975; U.S. Pat. No. 4,033,718, Jul. 5, 1977; U.S. Pat. No. 4,240,920, Dec. 23, 1980; U.S. Pat. No. 4,255,273, Mar. 10, 1981; U.S. Pat. No. 4,256,597, Mar. 17, 1981; U.S. Pat. No. 4,318,883, Mar. 9, 1982; U.S. Pat. No. 4,497,741, Feb. 5, 1985; U.S. Pat. No. 4,648,992, Mar. 10, 1987; and U.K. Pat. Appl. 1,372,035 published Oct. 30, 1974; U.K Pat. Appl. 1,408,144 published Oct. 1, 1975; U.K. Pat App. 2,159,516 published Dec. 4, 1985; E.P. 285,965 A2; E.P. 381,211 A2 published Aug. 8, 1990; E.P. 484,027 A1 published May 6, 1992; and Japanese Kokai 06-73397 Derwent Abst. No. (94-128933) published Mar. 15, 1994.
In addition to the above, other references describe the synthesis, preparation and properties of phthalocyanines and naphthalocyanines; see
Phthalocyanines: Properties and Applications
, Leznoff, C. C. and Lever A. B. P. (Eds), VCH, 1989
; Infrared Absorbing Dyes
, Matsuoka, M. (Ed), Plenum, 1990
; Inorg. Chem
., Lowery, M. J. et al., 4, pg. 128, (1965);
Inorg. Chem
. Joyner R. D. et al., 1, pg. 236, (1962);
Inorg. Chem
., Kroenke, W. E. et al., 3, 696, 1964
; Inorg. Chem
. Esposito, J. N. et al., 5, pg. 1979, (1966);
J. Am. Chem. Soc
. Wheeler, B. L. et al., 106, pg. 7404, (1984);
Inorg. Chem
. Ford, W. E, et al., 31, pg. 3371, (1992);
Material Science
, Witkiewicz, Z. et al., 11, pg. 39, (1978);
J. Chem. Soc
. Perkin Trans. I, Cook, M. J., et al., pg. 2453, (1988);
J. Chin. Chem. Soc
., 40, pg. 141, (1993);
J. Inorg. Nucl. Chem
., 28, pg. 899, (1966);
Polymer Preps
, 25, pg. 234, (1986);
Chem. Lett
., 2137, (1990);
J. Med. Chem
., 37, pg. 415, (1994).
SUMMARY OF THE INVENTION
This invention provides a detergent composition with an improved photobleach delivery system. Essential components are (a): a photobleach delivery system, very preferably one combining a mixture of PEG 4,000 and a hydrophobic photobleach such as a nonionic Si(IV) phthalocyanine substituted by nonionic axially bonded ligands, e.g., Silicon Phthalocyanine bis(1 PO/OH glycerol propoxylate), and mixed with an excess of nonbonded PO/OH glycerol propoxylate ligand; (b): a detersive surfactant, very preferably including a mid-chain methyl-branched surfactant, and (c): non-surfactant detergent adjunct.
More generally, the detergent composition comprises (a): a photobleach system consisting essentially of a photoactive mixture comprising (I) a specifically selected water-soluble polymer; (II) a specifically selected hydrophobic photobleach, preferably further comprising a nonbonded ligand as defined hereinafter; and, optionally, (III) an external coating or other encapsulation means.
The amount of the photobleach system in the detergent composition as a whole is from about 0.001% to about 30%, more preferably from about 0.001% to about 10%, more preferably still from about 0.01% to about 5%.
Expressed on the basis of the photobleach system taken alone before mixing into the detergent composition, there is present in the photobleach system, by weight, from about 0.01% to about 30%, more preferably from about 0.1% to about 15%, more preferably still from about 1% to about 5% of hydrophobic photobleach compound, from about 30% to about 99.9%, more preferably from about 70% to about 90%, more preferably still from about 80% to about 85% water-soluble polymer, and, when present, at least about 0.001%, more typically from 0.01% to about 60% preferably from about 1% to about 20%, more preferably still from about 5% to about 15% of nonbonded ligand in the photobleach system; (the units of parts per million; 1 ppm=1 milligram per liter=0.0001% by weight may alternatively be used herein from time to time, especially for content of photobleach component in the photobleach system or in the detergent composition).
Expressed on the basis of the amount of the components of the photobleach system in the detergent composition as a whole, there is present in the detergent composition, by weight, from about 0.015 ppm to about 0.5%, more preferably from about 0.010% t
Burckett-St. Laurent James Charles Theophile Roger
Burns Michael Eugene
de Guzman Trajano Trace Wendell
Heinzman Stephen Wayne
Jeffreys Brian
Case Western Reserve University
Delcotto Gregory
Fay Sharpe Fagan Minnich & McKee LLP
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