- 2014-12-01 (x)
- 2000-02-15 (x)
- Burns, Michael Eugene (x)
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Show moreField of the invention: The present invention is in the field of conumer products comprising photobleaches and photodisinfectants, epecially metal or metalloid phthalocyanine compounds useful for treating fabrics, e.g., in consumer products such as laundry detergents. Background of the invention: Historically, photobleaches in consumer products have been ionic, usually as a result of sulfonation. Salt forms of simple Zn or Al phthalocyanines are typically used. Sulfonation improves water-solubility and decreases interaction with common anionic surfactants used in detergents, but increases melting-point of the photobieach relative to a non-charged or non-salt material. Making a photobleach hydrophilic and giving it anionic charge also reduces its ability to partition into, and, upon exposure to light, to bleach oily, soils and stains. Recently, certain non-charged (nonionic) photobleaches have been developed. These include sophisticated ligands and non-charged photobleaches among those 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. These materials can be quite hydrophobic and are useful in laundry detergents. They have an improved ability to treat oily soils. Other photobleaches used in detergents have included some so-called "ion pair" types.Despite the recent advances, there remains a need for further improvements in photobleaches and/or photodisinfectants for use in consumer products. Specifically, there is an ongoing need for consumer products comprising photobleaches and/or photodisinfectants which are more resistant to aggregation, more useful for treating synthetic or lipid-soiled fabrics, and are readily capable of being uniformly dispersed, e.g., on dilution, in a consumer product composition. Uniform dispersion is very important to avoid a patchy effect in photobleaching of fabrics, or for effective photodisinfectancy. It is accordingly an object of the present invention to provide further improvements in consumer product compositions comprising photobleach and/or photodisinfectant compounds. These and other objects are accomplished herein, as will be seen from the following disclosure. Background articles: See for example U.S. Pat. Nos. 5,872,248; 5,484,778; 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 92-038692); 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. Nos. 3,860,484; 4,166,718; 4,209,417; 4,304,719; 4,368,053; 4,800,188; 4,806,514; 4,911,919; 5,135,717; 5,280,183; 5,346,670; 5,437,929; 5,482,514; 5,484,778; 5,561,106; 5,585,483; 5,665,689; 5,665,875; 5,679,661; 5,733,560; 5,824,800; WO 91/18006; WO 91/18007; WO 92/01753; WO 92/01753; WO 94/22960)
http://www.google.com/patents?vid=USPAT6593286
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Show moreField 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 Articles: 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
http://www.google.com/patents?vid=USPAT6462008
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Show moreFIELD OF THE INVENTIONThe present invention is in the field of photobleaches, especially photobleaches which are hydrophobically substituted metal or metalloid phthalocyanine compounds useful for treating fabrics, e.g., in consumer products such as laundry detergents.BACKGROUND OF THE INVENTIONHistorically, photobleaches in consumer products have been ionic, usually as a result of sulfonation. Salt forms are typically used. This improves water-solubility and decreases interaction with common anionic surfactants used in detergents, but increases melting-point of the photobleach relative to a non-charged or non-salt material. Making a photobleach hydrophilic and giving it anionic charge also reduces its ability to partition into, and, upon exposure to light, to bleach oily soils and stains.Recently, certain non-charged (nonionic) photobleaches have been developed. These include non-charged photobleaches among those 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. These materials can be quite hydrophobic and are useful in laundry detergents. They have an improved ability to treat oily soils.While nonionic photobleaches generally have lower melting-points than ionic photobleaches, it is believed that the nonionic photobleaches thusfar disclosed, at least in pure form, are solids at ambient temperature. Recent advances in such photobleaches indeed appear to have focused on improving the photophysics without sufficient regard to certain design characteristics, including melting-point, which may be very important to the formulator of consumer products.Chromophores such as phthalocyanines are typically of relatively high symmetry, thus nonionic photobleaches comprising such chromophores tend to have higher melting-points than many common nonionic organic compounds.Thus, despite the recent advances, there remains a need for further improvements in photobleaches for use in consumer products. Specifically, there is an ongoing need for photobleaches which are more hydrophobic, more useful for treating synthetic or lipid-soiled fabrics, and are capable of being uniformly dispersed without milling the crystals. Uniform dispersion is very important to avoid a patchy effect in photobleaching of fabrics. Yet, in particular, there is no known consumer product composition having a hydrophobic, liquid photobleaching compound. Such a photobleach compound would offer new possibilities to the formulator of consumer products, could be deposited more uniformly, and would offer economic advantages such as low energy input and the ability to avoid solvents when compounding or formulating the photobleach.It is accordingly an object of the present invention to provide further improvements in photobleach compounds, especially with respect to types wherein the photobleach is hydrophobic. Indeed it is an object herein to
http://www.google.com/patents?vid=USPAT6645928
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