Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Reexamination Certificate
2001-04-06
2002-05-14
Boyer, Charles (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
C510S271000, C510S289000, C510S356000, C510S405000, C510S413000, C510S506000
Reexamination Certificate
active
06387867
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a liquid detergent.
BACKGROUND ART
The liquid detergent used in an ordinary home may include a detergent for a hard surface, which is directed to a metal, a glass, a ceramic, a plastic and the like, and a detergent for a clothing, which can be applied directly to smears in or on a clothing. These detergents are blended with solvents such as, for example, methyl cellosolve and methyl carbitol in order to improve their detergent effect. However, the liquid detergent blended with these solvents are still not satisfactory in respect of detergency for persistent sebum smears such as smears in or on collars and cuffs and denatured-oil smears etc. in kitchens as well as smells derived from the solvents.
Meanwhile, JP-A 7-500861 describes a detergent composition comprising a mixture of an alkyl monoglyceryl ether and an alkyl diglyceryl ether as nonionic surfactants and a anionic surfactant. Further, U.S. Pat. No. 4,430,237 describes a detergent composition comprising a mixture of an alkyl glyceryl ether, an alkyl diglyceryl ether and an alkyl triglyceryl ether as nonionic surfactants. However, these compositions are still not satisfactory in respect of detergency for sebum smears etc. because of higher contents of the diglyceryl and triglyceryl ethers relative to the monoglyceryl ether.
In addition, a detergent for human body having improvement of its foaming property and rinsing property is demanded in particular for hair shampoo, body shampoo, face washing, hand washing and so on.
DISCLOSURE OF INVENTION
The object of the present invention is to provide a liquid detergent being excellent in detergency for persistent sebum smears such as smears in or on collars and cuffs and for denatured-oil smears etc. in kitchens and further having good smell as detergent.
The present invention relates to a liquid-detergent comprising (a) a compound represented by the following formula (1), (b) a compound represented by the following formula (2), (c) a compound represented by the following formula (3) and (d) a surfactant, wherein (a)+(b)+(c)=0.1 to 50% by weight, (a)/[(a)+(b)+(c)]=0.5 to 0.99, (b)/[(a)+(b)+(c)]=0.005 to 0.25 and (c)/[(a)+(b)+(c)]=0.005 to 0.25 (of which each and all are the ratios by weight):
wherein R is a hydrocarbon group containing from 1 up to 16 carbon atoms, X is selected from the group consisting of a hydroxyl group and an OR group, Y is also selected from the group consisting of a hydroxyl group and an OR group, and Z is selected from the group consisting of a hydroxyl group,
and W is also selected from the group consisting of a hydroxyl group,
provided that either Z or W is a hydroxyl group.
The above defined composition comprises three different glyceryl ether compounds from one another, (1), (2) and (3). It is preferable that both of Z and W are not hydroxyl group.
A composition containing the above-shown liquid detergent is useful as a detergent for domestic use such as washing of cloth, woven or non-woven fabrics, textile goods, tableware, dishes, glass, cup, metal goods, ceramic goods, plastic goods, kitchen, bathroom, bathtub, furniture and human body.
MODE FOR CARRYING OUT THE INVENTION
(a) to (c) Glyceryl Ether Type Compounds
The compounds represented by the following formulae (1), (2) and (3) can be used as the components (a), (b) and (c) in the present invention:
wherein R represents a hydrocarbon group having 1 to 16 carbon atoms, X is selected from the group consisting of a hydroxyl group and an OR group, Y is also selected from the group consisting of a hydroxyl group and an OR group, Z is selected from the group consisting of a hydroxyl group,
and W is also selected from the group consisting of a hydroxyl group,
provided that either Z or W is a hydroxyl group. Here, it is preferable that both of Z and W are not hydroxyl group. Further, at least one of Z and W is preferably a hydroxyl group.
In the formulae, R is preferably a hydrocarbon group having 3 to 12 carbon atoms, particularly 4 to 10 carbon atoms, in respect of improving the detergency. In particular, when the liquid detergent is used in washing by application, R is preferably an alkyl group having 7 to 9 carbon atoms, particularly 8 carbon atoms, in respect of detergent performance towards sebum smears in or on collars, cuffs etc. Further, when it is used as a detergent for hard surfaces, R is preferably an alkyl group having 4 to 6 carbon atoms. X, Y and Z are preferably hydroxyl groups. In addition, W is preferably
Specifically, the following compounds (4) to (9) can be mentioned as each of the above-described compounds:
wherein R represents an alkyl group having 1 to 16 carbon atoms, preferably an alkyl group having 4 to 6 or 8 carbon atoms.
Among them, the compounds (4), (5), (6) and (7) are preferable, and the compounds (4) and (5) are preferable in respect of detergent performance in washing by application in particular.
In respect of detergency and smell, the total amount ((a)+(b)+(c)) of the components (a), (b) and (c) in the present invention is 0.1 to 50% by weight, preferably 0.5 to 20% by weight, more preferably 1 to 15% by weight, as compared with the liquid detergent.
The ratio by weight of the component (a) to the said total amount ((a)/[(a)+(b)+(c)]) is 0.5 to 0.99, preferably 0.8 to 0.99, more preferably 0.86 to 0.99 and particularly preferably 0.9 to 0.99. Then, the ratio by weight of the component (b) to the said total amount ((b)/[(a)+(b)+(c)]) is 0.005 to 0.25, preferably 0.005 to 0.1, more preferably 0.005 to 0.07 and particularly preferably 0.005 to 0.05. Further, the ratio of the component (c) to the said total amount ((c)/[(a)+(b)+(c)]) is 0.005 to 0.25, preferably 0.005 to 0.1, more preferably 0.005 to 0.07 and particularly preferably 0.005 to 0.05.
The ratio by weight of the component (b) to the component (a) is preferably 0.001 to 0.1, more preferably 0.005 to 0.05, and the ratio by weight of the component (c) to the component (a) is preferably 0.001 to 0.15, more preferably 0.005 to 0.1. Further, in respect of improving the detergency, the ratio of the total amount of the components (b) and (c) to the component (a) (that is, [(b)+(c)]/(a)) is preferably 0.001 to 0.3, more preferably 0.005 to 0.2 and particularly preferably 0.01 to 0.15.
By the way, it is general that the compounds represented by the formulae (1) to (3) are produced by a process of reacting an epoxy compound such as, for example, epihalohydrin and glycidol using an acid catalyst such as BF
3
. However, the reaction of an alcohol with the epoxy compound occurs at random at 1- and 2-positions of the epoxy compound so that multiple addition-products are also formed. Accordingly, the resultant product is a mixture of the compound having an alcohol added at 1-position and being represented by the formula (1), the compound having an alcohol added at 2-position and being represented by the formula (2) and the multimer (which may be a multimeric compound, an oligomer or a polymer) having a large number of glyceryl groups added and being represented by the formula (3), and therefore the composition comprising the compounds (a) to (c) in a specific ratio for blend in the present invention was hardly obtained technically and economically.
Under these circumstances, the applicant found a method of using, for instance, an aluminum catalyst represented by the formula (10) described in WO 98/50389 as a method of economically and efficiently producing the above-described compounds in the present invention:
Al(OSO
2
—R
1
)
1
(OR
2
)
m
(OR
3
)
n
(10)
wherein R
1
represents a hydrocarbon group which may have a substitutent-group, R
2
is selected from the group consisting of a hydrocarbon group and a substituent hydrocarbon group, R
3
is selected from the group consisting of a hydrocarbon group and a substituted hydrocarbon group, l is 1 to 3, and each of m and n is an i
Ide Kazutoshi
Inoeu Takumi
Ishikawa Akira
Tsukuda Kazunori
Boyer Charles
Kao Corporation
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