Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2001-12-19
2004-08-03
Ogden, Necholus (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C570S185000, C570S185000, C570S185000, C570S185000, C570S185000, C570S185000, C570S185000
Reexamination Certificate
active
06770610
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a lime soap dispersant which has excellent dispersing property of lime soap (soap scum) generated during washing or rinsing, and also relates to a detergent composition and a cleaning composition comprising the lime soap dispersant.
BACKGROUND OF THE INVENTION
Soap is a detergent composed of an alkali metal salt of fatty acid and has been used for centuries as a detergent for clothes washing, body washing and face washing, due to the excellent washing performance, safety and the like thereof. However, since soap reacts with calcium ion or the like present in water to generate water-insoluble lime soap, various problems related to lime soap are caused. When water used for washing is hard water, such problems tend to be remarkably observed. When water used for washing is soft water, problems still occur because soft water also contains ions such as calcium ion. For example, when soap is used for washing clothes, the lime soap which is formed as a result of the reaction of soap with calcium ion or the like is deposited on clothes, whereby the cloth gets yellowish or give off unpleasant odor. Further, when the lime soap is deposited inside of a washing machine, the deposited lime soap, what is called “black scum”, causes problems such as clogging of water-distribution pipe of the washing machine.
Toilet soap also tends to cause unpleasant odor and/or stains at a washstand or a bathroom. Examples of a dispersant which has conventionally been proposed for dispersing lime soap include ethylene oxide adduct of higher aliphatic alcohol, polyoxyethylene/polyoxypropylene block copolymer, &agr;-sulfofatty acid methyl ester, sulfated fatty acid alkanol amide, betaine, sulfobetaine, and an amino carboxylic acid type amphoteric surfactant. However, these conventionally known lime soap dispersants do not achieve satisfactory results, although use of such conventional dispersants have shown some improvement in lime soap dispersion. Prior art which has been proposed further includes: a reference in which a polyoxyethylene alkyl ether ethyl dialkyl amine oxide type surfactant and a polyoxyethylene alkyl ether ethyl dialkyl amino acetic acid betaine type amphoteric surfactant are employed as a lime soap dispersant (Japanese Patent Application Laid-Open No. 5-117697); a reference which discloses an alkali detergent comprising as the base material a salt of alkyl ethoxy dicarboxylic acid (Japanese Patent Application Laid-Open No. 9-509447); and a reference which discloses a detergent composition comprising a specific lipolysis enzyme and a specific lime soap dispersant having lime soap dispersing ability (Japanese Patent Application Laid-Open No. 11-511780).
An object of the present invention is to provide a lime soap dispersant which has more excellent lime soap dispersing property than the conventional lime soap dispersant, as well as a detergent composition and cleaning composition comprising the lime soap dispersant.
SUMMARY OF THE INVENTION
The inventors of the present invention have discovered, as a result of eager study for solving the above-mentioned problems, that polyester having a specific structure has excellent lime soap dispersing property, thereby completing the present invention.
The present invention relates to a lime soap dispersant, which includes a polyester represented by the general formula:
wherein A represents a —CO— group, R
1
represents a C
2-4
alkylene group, R
2
represents a C
3-4
alkylene group, R
3
represents a phenylene group, naphthylene group or biphenylene group, R
4
represents a C
2-8
alkylene group, R
5
represents a C
2-8
alkylene group, R
6
represents a phenylene, naphthylene or biphenylene group which may be substituted with a —SO
3
M or —COOM group, X represents H, a C
1-4
alkyl group, —R
7
SO
3
M group, —R
8
COOM group or —C(O)R
9
group, M represents H or water-soluble cation, and R
7
, R
8
and R9 independently represent a C
1-4
alkyl group, m1 and m2 are independently a number of 0 to 25 while m1+m2 is 3 to 25, n1 is a number of 1 to 40, n2 is 0 to 5, n3 is 1 to 40, n4 is 1 to 10, n5 is 0 to 5, and n6 is 1 to 40.
In the aforementioned formula, the alkylene group and the alkyl group may be either in the form of a straight chain or branched. Examples of the phenylene group include a 1,4-phenylene group, a 1,3-phenylene group and a 1,2-phenylene group. Examples of the naphthylene group include a 1,8-naphthylene group and a 1,4-naphthylene group.
Examples of the biphenylene group include a 2,2′-biphenylene group and a 4,4′-biphenylene group. Further, examples of the water-soluble cation represented by M include alkali metal such as Na and K, ammonium, and alkanol amine.
The present invention also relates to a detergent composition that comprises the polyester represented by the aforementioned general formula (1).
The present invention also relates to a cleaning composition that comprises the polyester represented by the aforementioned general formula (1).
DETAILED DESCRIPTION OF THE INVENTION
The polyester of the present invention has excellent lime soap dispersing property, and by adding an appropriate amount of the polyester to a soap based detergent, it is possible to prevent lime soap attachment to cloth, a bath tub, a washstand, a washing machine and water-distribution pipes, which is caused by the use of the soap based detergent. Further, by adding the polyester of the present invention to a surfactant-based detergent in which soap is not used as the main agent, it is possible to prevent lime soap attachment to the aforementioned materials, to which lime soap would attach in the conventional application without the use of the polyester, and it is also possible to remove lime soap which has been attached to the aforementioned materials. Yet further, by combination of the polyester to a detergent or cleaner for a bath tub, a washstand, a washing machine, toilet, water-distribution pipes, kitchen and the like, it is possible to remove lime soap attached or both lime soap and oily stains attached with lime soap in an easy and sufficient manner.
The present invention will be described further in detail hereinafter.
A lime soap dispersant of the present invention is a polyester represented by the aforementioned general formula (1), and more preferably a polyester represented by the general formula:
wherein A, R
3
, R
6
, X, m1, m2, n1, n3, n4, and n6 are independently the same as defined with respect to the above general formula (1), and R
10
and R
11
independently represent H or a C
1-4
alkyl group.
The lime soap dispersant composed of a polyester represented by the general formula (1) of the present invention is used in a form of mixture with a detergent composition for body washing, clothes washing or hard surface washing such as washing for tiles, enamel, pottery and the like. The detergent composition to which the lime soap dispersant is combined may be any of the conventionally known detergents, and is not restricted to the aforementioned examples. Examples of the detergent composition include: a soap based detergent typically represented by soap; and a detergent in which soap is not used as the main agent but contains a nonionic synthetic surfactant, an anionic synthetic surfactant and/or a cationic synthetic surfactant as the main agent. Further, the lime soap dispersant of the present invention may be used in a form of mixture with a cleaning composition used for eliminating stains such as lime soap attached to a bath tub, a washstand, a washing machine, kitchen, water-distribution pipes and the like.
The amount of the lime soap dispersant represented by the aforementioned general formula (1) to be combined to a detergent or a cleaner is not particularly restricted as long as the amount of the lime soap dispersant is set within the range which enables achieving the object of the present invention. Specifically, in the case of the soap based detergent, the content of the lime soap dispersant is to be 5 to 100 weight %, preferably 10 to 40 weight % per weight of t
Kondo Shigemi
Takeuchi Hideo
Clariant Finance (BVI) Limited
Ogden Necholus
Silverman Richard P.
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