Compositions – Oxidative bleachant – oxidant containing – or generative – Contains activator admixed with inorganic peroxide
Patent
1995-05-18
1998-10-27
Anthony, Joseph D.
Compositions
Oxidative bleachant, oxidant containing, or generative
Contains activator admixed with inorganic peroxide
25218639, 25218628, 510312, C09K 300, C11D 339
Patent
active
058274472
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/JP92/0150S Nov. 18, 1992.
1. Field of the Invention
The present invention relates to a liquid bleaching agent composition, more particularly to a liquid bleaching agent composition having not only an excellent storage stability but also a good bleaching power.
2. Description of the Related Art
Bleaching agent is chemically classified into chlorine-base bleaching agent and oxygen-base bleaching agent. Further, it is physically classified into solid (powdery) bleaching agent and liquid bleaching agent.
The chlorine-base bleaching agent is limited in the kind of fibers to which it can be applied, cannot be used for colored or patterned fabrics, and has a peculiar odor. For this reason, in recent years, an oxygen-base bleaching agent free from these drawbacks has come to widely spread in the art.
Sodium percarbonate and sodium perborate are particularly utilized as the solid oxygen-base bleaching agent from the viewpoint of bleaching performance, stability, etc. A liquid oxygen-base bleaching agent wherein use is made of hydrogen peroxide has also considerably spread by virtue of its handleability.
Since the bleaching power of the oxygen-base bleaching agent is lower than that of the chlorine-base bleaching agent, a bleaching agent composition comprising a combination of the oxygen-base bleaching agent with various bleach activators are utilized in the art. Examples of the activator include nitrites represented by acetonitrile, 0-acetylated compounds represented by glucose pentaacetate (GPAC), N-acylated compounds represented by tetraacetylethylenediamine (TAED) and acid anhydrides represented by maleic anhydride.
As a result of the studies conducted by the present inventors, it has been found that compounds capable of reacting with hydrogen peroxide to yield an organic peracid having a quaternary ammonium group, such as those described in U.S. Pat. Nos. 4,933,103 (assignee: Kao Corp., date of grant: Jun. 12, 1990), 5,059,344 (assignee: Kao Corp., date of grant: Oct. 22, 1991), 4,915,863 (assignee: Kao Corp., date of grant: Apr. 10, 1990), 4,978,770 (assignee: Kao Corp., date of grant: Dec. 18, 1990) and the like are very excellent as the bleach activator. Further, examples of an organic peracid precursor having an anionic group are described in U.S. Pat. Nos. 4,412,934 (assignee: Procter & Gamble Co.; date of grant: Nov. 1, 1983), 4,681,592 (assignee: Procter & Gamble Co.; date of grant: Nov. 1, 1987) and the like.
When the bleaching agent composition comprises a mixture of solid substances, a good storage stability can generally be attained when the composition comprises a mixture of a solid peracid salt with the above-described solid bleach activator as a dried particle capable of yielding the above-described organic peracid. Neither any remarkable reaction nor a loss of the activity occurs until the composition is poured into water in a washing machine, etc., so far as they are maintained under dry condition during storage. However, when the composition is exposed to a highly humid environment, for example, in a bathroom, the dry bleaching agent (solid peracid salt) becomes humid, whereby its activity is lowered. When hydrogen peroxide which is liquid at an ordinary temperature is used as a peroxide source, it is impossible to provide a bleaching agent composition in a dried particle form.
Several proposals have been made on a liquid bleaching agent composition comprising hydrogen peroxide. U.S. Pat. No. 3,970,575 (assignee: Purex, date of grant: Jul. 20, 1976) discloses a bleaching agent composition comprising hydrogen peroxide which is stable under an acidic condition and is colored blue with a phthalocyanine pigment. U.S. Pat. No. 3,956,159 (assignee: Procter & Gamble Co.; date of grant: May 11, 1976) discloses a liquid bleaching agent composition comprising an organic peracid and its salt dissolved in an anhydrous organic ternary solvent (a three-component solvent). Further, U.S. Pat. No. 4,238,192 (assignee: Johnson & Johnson; date of grant: Dec. 9, 1980) discloses a l
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JP-A-04 337 339 (Kao) Japanese Patent Abstract, 25 Nov. 1992.
JP-A-04 337 398 (Kao) Japanese Patent Abstract 25 Nov. 1992.
Aoyagi Muneo
Tamura Yoshinori
Yamada Hiroyuki
Anthony Joseph D.
Kao Corporation
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