Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – With halogen – nitrogen – oxygen – or phosphorus containing...
Reexamination Certificate
2000-02-08
2001-04-24
Gupta, Yogendra (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
With halogen, nitrogen, oxygen, or phosphorus containing...
C510S237000, C510S238000, C510S319000, C510S389000, C510S362000, C510S391000, C510S437000, C510S470000, C510S480000, C510S488000, C510S491000, C510S503000, C510S504000
Reexamination Certificate
active
06221828
ABSTRACT:
TECHNICAL FIELD OF INVENTION
The present invention relates to a detergent being excellent in detergency and sterilizing property and causing less corrosion and/or damage to plastic.
PRIOR ART
In washing of hard surface of a plastic, a glass, a metal, a pottery, a tile, a wood, a concrete etc., visually recognizable dirt can be removed by treatment with a detergent. Since removal of microorganisms is not satisfactory, the dirt is first removed with a detergent and a germicide typically such as an alcohol and an invert soap is then used to remove the microorganisms. This method, however, includes two steps of washing and sterilizing, being troublesome. This is the reason another detergent is demanded to conduct washing and sterilization simply at a time.
On the other hand, among materials having hard surface, some kinds of plastic such as ABS resin are poor in chemical resistance and some detergents are found to cause corrosion or damage.
JP-A 3-127717 discloses a detergent for human body including a nonionic surfactant made from sugar and a germicide. DE-A 4414696 shows a detergent for human body containing an alkyl polyglycoside and an anionic, nonionic, cationic or amphoteric surfactant.
DISCLOSURE OF INVENTION
Accordingly, the object of the present invention is to provide a detergent by which washing and sterilization can be effected at a time and no corrosion nor damage to plastic such as ABS resin is recognized.
The invention is a detergent composition comprising (A) 0.01 to 50% by weight of an alkyl polyglycoside, (B) 0.001 to 25% by weight of at least one germicide selected from the group consisting of a cationic germicide, a biguanide germicide and an amino acid germicide and (C) a fatty acid salt at a ratio by weight of (B) /(C) in the range of from 100/0.1 to 100/20.
The component(B) is preferably a cationic germicide.
The composition preferably comprises 0.01 to 15% by weight of (A) and 0.01 to 10% by weight of a cationic germicide (B) at a ratio of (B)/(C) being from 100/1 to 100/10.
The invention further provides a method of washing a hard surface with the above shown composition and use of the composition as a detergent for a hard surface.
DETAILED EXPLANATION OF INVENTION
The component (A) is preferably an alkyl polyglycoside represented by the following formula (A-1):
R
1
(OR
2
)
x
G
y
(A-1)
wherein R
1
represents a straight-chained or branched, C
8
to C
18
, preferably C
10
to C
14
, alkyl group or alkenyl group, or an alkylphenyl group; R
2
represents a C
2
to C
4
alkylene group; G is a residue derived from C
5
to C
6
reducing sugar, preferably from glucose; x is a number from 0 to 5, preferably 0, on the average and y is a number from 1 to 10, preferably 1.1 to 2.0, on the average.
The content of the blended component (A) is 0.01 to 50% by weight, preferably 0.1 to 15% by weight.
In addition, the component (B) of a cationic germicide is preferably a cationic surfactant represented by the following formula (B-1) or (B-2), a biguanide germicide and an amino acid germicide:
wherein one or two of R
3
to R
6
groups represent a C
8
to C
16
straight-chained or branched alkyl group or alkenyl group, or a group represented by the following formula:
and the others are the same as or different from one another and represent a C
1
to C
3
alkyl group, a benzyl group or a group represented by the formula of —(CH
2
CH
2
O)
m
H (m, being an average mole number of added ethylene oxide, is 2 to 20); R
7
represents a C
12
to C
18
straight-chained or branched alkyl group or alkenyl group and X represents a halogen atom, preferably chlorine, or a group forming an organic anion.
Concretely are included cationic surfactant germicides such as a dialkyldimethyl ammonium halide, a benzalkonium chloride, benzethonium chloride and a derivative thereof having a counter ion substituted by another anion; biguanide germicides such as chlorhexidine and chlorhexidine gluconate; and amino acid germicides such as an alkyl-diaminoethyl glycine and an alkylpolyaminoethyl glycine. In view of both detergency and sterilizing property, those represented by formula (B-1) wherein each of two of R
3
to R
6
groups is a C
8
to C
10
straight-chained alkyl group and the others are methyl group are most preferable.
The amount of the blended component (B) is 0.001 to 25 by weight, preferably 0.01 to 10% by weight.
The component (C) is preferably a C
6
to C
18
straight-chained or branched, saturated or unsaturated fatty acid salt. More preferably is it a C
8
to C
12
straight-chained fatty acid salt. The counter ion for salt preferably includes an alkali metal such as sodium and potassium, an alkaline earth metal such as magnesium and calcium and an alkanolamine such as monoethanolamine, diethanolamine and triethanolamine. In view of solubility, sodium, potassium and an aklanolamine are more preferable. Potassium and an alkanolamine are most preferable.
From the viewpoint of blending stability, it is preferably an alkanolamine salt such as a monoethanolamine salt and a diethanolamine salt. A preferable fatty acid salt has an alkyl or alkenyl having 6 to 18 carbon atoms.
To increase the detergency without any deterioration of the sterilizing property, the component (C) is blended with the component (B) at a ratio of (B)/(C) by weight in the range of from 100/0.1 to 100/20, preferably 100/1 to 100/10.
Further, an alkyldimethylamine oxide (D) represented by the formula (I) below may be added to the detergent of the present invention to improve a blending stability and increase detergency:
in which R represents a C
8
to C
18
straight-chained or branched alkyl group or alkenyl group.
In the formula (I), R is preferably a C
10
to C
14
straight-chained alkyl group. The amount of the blended alkyldimethylamine oxide is preferably 0.5 to 10% by weight, more preferably 1 to 5% by weight.
From the viewpoint of easiness in use, the detergent of the present invention is preferably an aqueous liquid detergent comprising the components (A) to (C) dissolved or dispersed in an aqueous medium.
For improvement in detergency and blending stability, a rust preventive is preferably added to the detergent of the present invention in order to prevent corrosion when a metal chelating agent (E), a water-soluble solvent, an alkaline agent or a halogen-containing cationic germicide is used.
The metal chelating agent used is a hydroxycarboxylic acid or a salt thereof or an aminocarboxylic acid or a salt thereof. In particular, are preferably ethylenediamine tetraacetic acid, hydroxyethyl ethylenediamine triacetic acid, nitrilotriacetic acid, citric acid and a salt of them. The metal chelating agent is incorporated preferably in an amount of 1 to 30 parts by weight, more preferably 5 to 20 parts by weight to 100 parts by weight of the component (B).
The water-soluble solvent includes a C
1
to C
5
monohydric alcohol such as ethanol, a C
2
to C
12
dihydric alcohol such as ethylene glycol and a polyalkylene glycol alkyl ether such as diethylene glycol monoethyl ether. The amount of the water-soluble solvent is preferably 0.01 to 30% by weight, more preferably 0.1 to 10% by weight.
The alkaline agent used includes a hydroxide, carbonate, sulfate or silicate of an alkali metal or an alkanolamine etc. In particular monoethanolamine is preferable because of its high detergency and its low residual degree. The amount of the blended alkaline agent is preferably 0.01 to 30% by weight, more preferably 0.1 to 10% by weight.
The rust preventive includes compounds such as silicates, benzoates, nitrites, benzotriazole and benzothiazole. In particular nitrites are preferable.
Perfumes, dyestuffs, pigments etc. may be added, if necessary, to the detergent of the present invention.
The detergent being excellent in both detergency and sterilizing property and causing less corrosion or damage to plastic, particularly ABS resin, can be obtained according to the present invention.
REFERENCES:
patent: 4606850 (1986-08-01), Malik
patent: 4919837 (1990-04-01), Gluck
patent: 4919846 (1990-04-01), Nakama et al.
pate
Azuma Toshikazu
Ito Sumitoshi
Itoi Takashi
Matsuo Noboru
Yamasawa Susumu
Boyer Charles
Gupta Yogendra
Kao Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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