Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1999-06-04
2000-08-15
Douyon, Lorna M.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510192, 510102, 510446, 510447, 510495, 424 767, 4224, 134 42, C11D 350, C11D 1700
Patent
active
061036811
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to lavatory cleansing compositions and particularly concerns solid lavatory cleansing compositions either intended to be positioned in a toilet bowl or urinal in such a manner that the composition is rinsed with water on flushing (toilet rim blocks or toilet rinse blocks) or intended to be positioned in a toilet or urinal cistern, immersed in flush water (in-cistern blocks).
BACKGROUND TO THE INVENTION
Solid lavatory cleansing compositions are well known. See, for example, EP0167210, EP0350227, EP0462643, EP0526437, WO95/25162 and U.S. Pat. No. 4,666,671, for a discussion of solid compositions intended for use in toilet bowls, ie toilet rim blocks or toilet rinse blocks. GB 2290300 discloses toilet rim blocks comprising polyvinyl alcohol or partially hydrolysed polyvinyl acetate with fragrance material that may include a small amount of beta phenyl ethyl alcohol, at a level of 0.47% by weight.
SUMMARY OF THE INVENTION
According to the present invention there is provided a solid lavatory cleansing composition comprising phenyl ethyl alcohol (PEA) in an amount of at least 2.5% by weight of the total weight of the composition.
PEA is a known fragrance material and acts to impart desirable fragrance properties to the composition. PEA also has antibacterial properties, so this material also acts to impart antibacterial properties to the composition.
The composition may be otherwise of generally conventional formulation.
The composition desirably comprises surfactant, preferably anionic surfactant, for cleaning purposes. Surfactant is suitably present in an amount in the range 25 to 75% by weight, conveniently 25 to 50% by weight, preferably 30 to 40% by weight of the total weight of the composition.
Anionic surfactants which can be used in the present invention include for example the alkali metal alkyl substituted benzene sulphonates, alkali metal long chain alkyl sulphates, alkali metal ether sulphates derived from long chain alcohols and alkyl phenols, alkali metal alkane sulphonates, alkali metal olefin sulphonates and alkali metal sulphosuccinates, of which the sodium salts are preferably used.
Preferred anionic surfactants are sodium C.sub.9 -C.sub.14 alkyl benzene sulphonates, sodium C.sub.11 -C.sub.10 olefin sulphonates, sodium C.sub.11 -C.sub.20 alkane sulphonates and sodium long chain C.sub.10 -C.sub.14 alkyl sulphates or mixtures thereof, sodium alkyl benzene sulphonates being particularly preferred as the main surfactant component.
In addition, other types of surfactants, such as nonionic surfactants including ethoxylated nonionic compounds, fatty acid alkanolamides and amine oxides, may be incorporated as desired, but only in amounts not exceeding 20% by weight, preferably less than 10% by weight, since they could otherwise tend to affect the foaming properties and rate of wear of the composition.
The composition desirably also includes a filler, which is suitably present in an amount in the range 20 to 75% by weight, preferably 40 to 65 % by weight, more preferably 50 to 60% by weight of the total weight of the composition.
The filler can be an electrolyte, such as sodium sulphate, sodium chloride, sodium carbonate and phosphates, such as sodium triphosphate, hexametaphosphate, pyrophosphate and orthophosphate; or and inert material, such as calcite, clay and urea. A mixture of filler materials may be used.
Fragrance, comprising PEA possibly in combination with other fragrance materials, is typically present in an amount in the range 5 to 20% by weight, eg about 10% of the total weight of the composition. The fragrance preferably comprises at least 50% by weight of the weight of the fragrance, corresponding to PEA levels in the composition of at least 2.5% to at least 10% by weight of the total weight of the composition.
The composition may additionally include a solubility control agent to reduce solubility of the composition and so extend the life of the composition in use.
Suitably solubility control agents include natural polysaccharide gums
REFERENCES:
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patent: 4578207 (1986-03-01), Holdt et al.
patent: 4604487 (1986-08-01), Wiegers et al.
patent: 4666671 (1987-05-01), Purzycki et al.
patent: 4842853 (1989-06-01), Gebauer et al.
patent: 4994266 (1991-02-01), Wells
patent: 5543439 (1996-08-01), McDermott et al.
Chantler Stephen John
Dobson Paul Henry
Douyon Lorna M.
Quest International B.V.
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