Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1998-03-03
1999-07-27
Anthony, Joseph D.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
25218638, 25218629, 8111, C11D 339, C11D 3395, C09K 300, C01B 1500
Patent
active
059290137
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention is concerned with a peroxide bleach product with excellent bleaching activity. The bleach product of this invention is characterized by its content of cyanourea as the bleach activating agent and is used for bleaching of fabrics. The bleach product of this invention is preferably used for bleaching of mold developed on the walls of a house or furniture.
BACKGROUND ART
Bleaches and mold removers are classified into chlorine bleach and peroxide bleaches. Chlorine bleaches with the main component of sodium hypochlorite have been used for bleaching fabric and mold developed on the walls of a house or furniture because of its strong bleach activity. However, despite the excellent bleaching effectiveness, chlorine bleach products are fraught with weaknesses such as discoloration of the fabric, making its use inappropriate for colored fabric, unpleasant characteristic odor due to the chlorine molecule during use and the possible danger of poisoning due to chlorine gas.
On the other hand, peroxide bleaches have been used more frequently in the general household because of the wide applicability as a bleach compared to the chlorine type and the absence of malodor. However, the bleaching effectiveness of peroxide bleaches is inferior, if used alone, compared to chlorine bleaches, resulting in poor bleaching performance when used for fabrics at low temperatures and when used for bleaching mold on the surface of household walls or furniture, especially mold which develops on the sink in the kitchen and on the walls and ceiling of the bathroom and tile joints.
Consequently, attempts have been made to increase the bleaching activity by addition of N-acyl compounds such as tetraacetylethylenediamine (TAED) or tetraacetyl glycoluryl (TAGU) or esters such as glucose pentaacetate or saccharose octaacetate to peroxide compounds such as hydrogen peroxide, hydrogen peroxide adduct of sodium carbonate or sodium perborate. Various proposals have been made to use nitrile compounds as the activating agent for improved bleaching activity of peroxide compounds. United Kingdom Patent Application No. 802,035 described use of various nitrile compounds and U.S. patent application Ser. No. 3,882,035 described a bleach product containing iminodiacetonitrile as the activating agent. Japanese Kokai p-chlorobenzoylcyanamide.
However, insufficient bleaching activity was obtained for fabrics at low temperatures and for removal of household mold by bleaching. There is another weakness in such bleach in that malodor, specifically peracetic acid was generated as the result of reaction of hydrogen peroxide in the use of activators such as N-acyl compounds, for example, TAED, and esters, for example, glucose pentaacetate.
DISCLOSURE OF INVENTION
This invention offers a bleach product with excellent bleaching activity on fabric as well as excellent activity for removal of mold on household walls and furniture by bleaching without malodor.
After intense studies for the solution of aforementioned problems, we discovered that a marked improvement can be made in bleaching of fabrics and removal of mold on household furniture and walls by bleaching without generation of malodor by the use of a bleach product composed of hydrogen peroxide or a peroxide which gives rise to hydrogen peroxide in aqueous solution, cyanourea and an alkaline agent, under the condition that alkalinity is achieved when the product is dissolved in water. The invention is the result of this discovery.
The invention offers a bleach product characterized by its content of (A) hydrogen peroxide or peroxide compounds which generate hydrogen peroxide in aqueous solution, (B) cyanourea and (C) an alkaline agent under the provision that pH 8 or higher is achieved in the aqueous solution of the product.
As (A) hydrogen peroxide or a peroxide which generates hydrogen peroxide in aqueous solution, one can use an aqueous solution of hydrogen peroxide or hydrogen peroxide with added sodium carbonate with a molar ratio between sodium carbonate and hydrogen
REFERENCES:
patent: 3882035 (1975-05-01), Loffelman et al.
patent: 3951594 (1976-04-01), Smolens
patent: 3982892 (1976-09-01), Gray
patent: 3986972 (1976-10-01), Loffelman et al.
patent: 4025453 (1977-05-01), Kravetz et al.
patent: 4086175 (1978-04-01), Kravetz et al.
patent: 4199466 (1980-04-01), Benson, Jr.
patent: 4337060 (1982-06-01), Dalmas
patent: 5482516 (1996-01-01), Sheppard
patent: 5591378 (1997-01-01), Deline et al.
Hiro Yasuo
Kobayashi Tsuneo
Kokubu Jun
Kuriyama Yasuhisa
Mikami Masahito
Anthony Joseph D.
Johnson Company Ltd.
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