GB2027736A - Cleaning Preparation for Glass Surfaces - Google Patents
Cleaning Preparation for Glass Surfaces Download PDFInfo
- Publication number
- GB2027736A GB2027736A GB7927769A GB7927769A GB2027736A GB 2027736 A GB2027736 A GB 2027736A GB 7927769 A GB7927769 A GB 7927769A GB 7927769 A GB7927769 A GB 7927769A GB 2027736 A GB2027736 A GB 2027736A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cleaning
- windscreen
- cleaning preparation
- preparation according
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/261—Alcohols; Phenols
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/22—Carbohydrates or derivatives thereof
- C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
- C11D3/225—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin etherified, e.g. CMC
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/06—Hydroxides
Abstract
A cleaning preparation for use in cleaning vehicle windscreens, headlamp glasses and the like comprises an aqueous solution containing a cleaning agent, preferably volatile, such as a mildly- alkaline mixture of ammonia solution and phenol, and a water-soluble cellulose derivative, such as sodium carboxymethyl-cellulose. In use the preparation is added to, for example, reservoir water of a vehicle windscreen-washing system and the resulting solution applied to a windscreen in the normal manner to clean the windscreen. The preparation may also include a wetting agent and a freezing-point depressant, for example, isopropylalcohol.
Description
SPECIFICATION
Cleaning Preparations
This invention relates to cleaning preparations
and is concerned especially with cleaning
preparations for cleaning vehicle windscreens and
other transparent panels such as, for example,
headlamp glasses.
The invention is particularly concerned with cleaning preparations which are to be added to water contained in, for example, a reservoir of a vehicle windscreen and/or headlamp glass washing system.
Heretofore, various additives have been proposed which may be added to water contained in the reservoir of a vehicle windscreen washing system in order to effect more efficient cleaning of the windscreen, and in particular the removal of oil-bound dirt particles from the windscreen.
These known additives generally comprise an aqueous solution which contains a cleaning agent such as, for example, sodium hydrogen phosphates and a detergent, thio-acids, or washing soda and soaps. Whilst these additives, when dissolved in the water of a windscreen washing system and sprayed onto a windscreen, have generally proved satisfactory in their ability, together with the operation of windscreen wipers, to remove dirt particles from the windscreen, it has been found that they tend to cause smearing on the windscreen. It is believed that this smearing results from the use of the abovementioned cleaning agents and that upon evaporation of the aqueous solution from the windscreen, a small amount of opaque precipitation from the cleaning agents is left behind on the windscreen.For example, when an additive including sodium hydrogen phosphates is mixed with hard tap water contained in a windscreen washer reservoir, an unsoluble precipitate of calcium phosphates is formed in the solution which is subsequently sprayed onto the windscreen. This precipitate remains on the windscreen when the remainder of the solution has evaporated and gives rise to smearing.
It is an object of the present invention to provide a cleaning preparation suitable for use as an additive in a washing system which is capable of readily removing oil-bound dirt particles from vehicle windscreen, headlamp glasses or other transparent panels.
Another object of the present invention is to provide a cleaning preparation, suitable for use as an additive for a windscreen and/or headlamp glass washing system, having a cleaning agent which substantially overcomes the above disadvantage.
According to one aspect of the present invention, a cleaning preparation for use in cleaning vehicle windscreens and the like comprises an aqueous solution which contains a cleaning agent and a water-soluble cellulose derivative.
The water-soluble cellulose derivative preferably comprises sodium carboxymethylcellulose. The sodium carboxymethylcellulose may comprise 0.2 to 10% by weight per total volume of the aqueous solution.
The cleaning agent is preferably volatile and may comprise 0.2 to 8% by weight per total volume of the aqueous solution. The cleaning agent may be a mixture of ammonia and phenol, the ratio of ammonia to phenol being such that the cleaning agent is mildly alkaline.
The aqueous solution may also include a wetting agent and a freezing-point depressant, for example, isopropylalcohol.
According to another aspect of the present invention a washing solution for washing vehicle windscreens and the like comprises a mixture of a cleaning preparation in accordance with the one aspect of the present invention, and water, wherein the cleaning preparation comprises 1 to 20% by volume of the washing solution.
Cleaning preparation in accordance with the present invention and in particular preparations for use as additives in vehicle windscreen washing systems will now be described by way of example.
The cleaning preparations to be described are intended to be added to water contained in a reservoir of a vehicle windscreen washing system to assist in the removal of dirt particles and such like from the windscreen.
The cleaning preparations generally comprise an aqueous solution containing a cleaning agent.
The aqueous solution includes a chemical which has the effect of improving the 'wetting' properties of the water in the reservoir to which the cleaning preparation is added. The mixture comprising the preparation and the reservoir water, hereinafter referred to as the washing solution, spreads more easily over the surface of the windscreen and is able to cover a larger area.
An example of such a wetting agent is isopropylalcohol which improves the wetting properties of the washing solution possibly by reducing the surface tension of the reservoir water. This particular chemical has an added advantage in that it is capable of lowering the temperature at which the preparation freezes.
Subject to seasonal requirements, a sufficient quantity of this chemical may be included in the cleaning preparation such that, when the preparation is added in predetermined proportions to the water in the reservoir of the windscreen washing system, the resulting solution, that is, the washing solution, is prevented from freezing at the lowest temperature expected to be encountered.
The use of isopropylalcohol is particularly convenient since it serves as both a wetting agent and a freezing-point depressant. However, other known wetting agents and other known freezingpoint depressants may be employed instead.
The cleaning agent comprises a mixture of an ammomia solution, for example, I.C.l's Ammonia
Liquor, and phenol. The phenol is preferably provided in the form of detached phenol crystals which are convenient to handle during manufacture of the cleaning preparation and are also easily dissolved in the aqueous solution. Both the ammonia solution and the phenol are volatile and evaporate completely from the windscreen to which they are applied in contrast to cleaning agents such as washing soda and soaps, or thioglycollic acid which tend to leave precipitates on the windscreen.
In addition to the cleaning agents, a watersoluble cellulose derivative having a refractive index, when in the form of a thin film, substantially the same as that of the glass of the vehicle windscreen, is also added to the aqueous solution of the cleaning preparation for reasons which will become apparent. One example of such a water-soluble cellulose derivative is sodium carboxymethylcellulose which is commercially available under the name 'cellulose gum' from the Hercules Powder Company
Limited.
Sodium carboxymethylcellulose dissolves
rapidly in hot or cold water, is oil resistant, and
has the ability to thicken the solution to which it is
added. Thus by including such a cellulose
derivative in the cleaning preparation, the
preparation is thickened and packaging of the
preparation in, for example, sachets, and transfer
of the preparation from its package to the
reservoir of the windscreen washing system is
greatly facilitated.
With the exception of the cellulose derivative,
each of the ingredients of the cleaning
preparation is volatile. Hence, when the cleaning
solution containing the cleaning preparation is
sprayed onto a vehicle windscreen, all the
ingredients, apart from the cellulose derivative
(and perhaps minute traces of solids that may
unavoidably be present in ordinary tap water),
either evaporate from the windscreen or are
wiped away, together possibly with some of the
cellulose derivative, by the wiper blades if
operated. The cellulose derivative that is left
behind on the windscreen forms a thin film on the
area of the windscreen over which the cleaning
solution spreads or is wiped.This thin layer is
transparent and, in the case of sodium
carboxymethylcellulose in particular, has a
refractive index of approximately 1.5, which is
substantially the same as that of the glass of a
vehicle windscreen, so that optical transmission
through the vehicle's windscreen is substantially
unaffected.
It has been found that the thin film formed by
the cellulose derivative in the above manner will
fill minute scratches on the surface of the
windscreen, such as those caused by, for
example, dirt particles trapped between the wiper
blades and the windscreen. In the case of wider
and deeper scratches, the thin film of cellulose
derivative only partially fills the scratches but, in
doing so, provides a smoothly-contoured covering
over the sharp, prismatic edges of the scratches.
Scratches on the surface of the windscreen tend
to scatter light and are a common source of glare.
Thus, by filling in these minute scratches, or at least providing a smoothly-contoured layer over sharp edges of larger scratches, the thin film of cellulose derivative helps to eliminate this source of glare.
As previously mentioned, cellulose derivatives, such as sodium carboxymethylcellulose, are oil resistant. This property has a particular advantage with regard to the thin film of cellulose derivative formed on the vehicle's windscreen. The thin film provides a protective barrier on the surface of the windscreen and any oil or diesel-fuel coated particles of dirt which may be thrown up from the road surface or emitted from vehicle exhausts, and indeed other dirt particles, adhere to this thin film and are prevented from directly contacting the area of the windscreen behind the thin film.
Upon the next application of cleaning solution to the windscreen, the thin film, together with the adhering particles of dirt, are dissolved and washed away from the windscreen, possibly with the help of the vehicle's windscreen wipers, and a fresh film of cellulose derivative is formed on the windscreen. It is seen therefore that the inclusion of the cellulose derivative in the cleaning preparation provides a simple and effective means of preventing dirt particles adhering directiy to the windscreen and at the same time enables dirt particles and such like to be easily removed from the windscreen.
One particular example of a cleaning preparation in accordance with the present invention will now be described. The aqueous solution includes a mixture which comprises approximately 80% by volume of water and 20% by volume of isopropylalcohol. To this mixture is added approximately 1% by weight per total volume of sodium carboxymethylcellulose and approximately 0.75% by weight per total volume of each of the cleaning agent constituents, which comprise I.C.l's ammonia liquor having a specific gravity of approximately 0.88, and detached phenol crystals. The ammonia liquor, which is alkaline, and the phenol crystals, which is acid, are mixed in predetermined proportions such that the cleaning agent has a pH value in the order of 9, that is, the cleaning agent is mildly alkaline.
The chemical environment of the cleaning preparation helps to prevent the cleaning preparation from gelling during prolonged periods of storage of the cleaning preparation in its packaging. Furthermore, the presence of ammonia liquor and phenol in the preparation helps to eliminate bacteria or fungi which may otherwise feed on the cellulose derivative.
The specific example of the cleaning preparation described above is illustrative of a preferred cleaning preparation particularly suitable for use as an additive for water contained in a windscreen washer reservoir and improves considerably the cleaning power of the windscreen washing system.
It is envisaged however that the relative proportions of the ingredients constituting the cleaning preparation may be varied to suit different requirements. For example, the proportion of cleaning agent in the cleaning preparation may be increased to cope with more difficult dirt and grime which may be encountered in some situations. In general, the cleaning agent comprises between 0.2% and 8% by weight per total volume of the cleaning preparation.
Similarly, the amount of sodium carboxymethylcellulose can also be varied, preferably lying within the range of 0.2 to 10% by weight per total volume of the cleaning preparation.
As previously mentioned, the cleaning preparation is conveniently packaged in sachets.
Each sachet preferably contains approximately 33 ml of the cleaning preparation and this amount has been found to be sufficient to treat approximately one litre of water. Generally speaking however, the preparation may be added to the water such that the resulting washing solution contains 1 to 20% by volume of the cleaning preparation.
Additional quantities of isopropyl alcohol or other totally insoluble freezing point depressant may be added to suit seasonal requirements.
Of course, the cleaning preparation can also be used in a headlamp glass washing system.
Although the cleaning preparation is particularly suitable for use in cleaning transparent surfaces, such as glass, in vehicles, it may also be used to clean other surfaces such as mirrors and windows of buildings. In this case, the cleaning preparation may simply be added to water in, for example, a bucket, applied with a cloth and wiped off with a squeegee.
Claims (12)
1. A cleaning preparation for use in cleaning vehicle windscreens and the like comprising an aqueous solution which contains a cleaning agent and a watereoluble cellulose derivative.
2. A cleaning preparation according to Claim 1, wherein said water soluble cellulose derivative comprises sodium carboxymethylcellulose.
3. A cleaning preparation according to Claim 2, wherein the sodium carboxymethylcellulose comprises 0.2 to 10% by weight per total volume of the aqueous solution.
4. A cleaning preparation according to any one of the preceding claims, wherein said cleaning agent is volatile.
5. A cleaning preparation according to Claim 4, wherein said cleaning agent comprises 0.2 to 8% by weight per total volume of said aqueous solution.
6. A cleaning preparation according to Claim 4 or Claim 5, wherein said cleaning agent includes ammonia.
7. A cleaning preparation according to Claim 6, wherein said cleaning agent further includes phenol.
8. A cleaning preparation according to Claim 7, wherein the ratio of ammonia to phenol in said cleaning agent is such that the cleaning agent is mildly alkaline.
9. A cleaning preparation according to any one of the preceding claims, wherein the aqueous solution includes a wetting agent.
1 0. A cleaning preparation according to any one of the preceding claims, wherein said aqueous solution includes a freezing point depressant.
11. A cleaning preparation according to any one of Claims 1 to 8, wherein said aqueous solution includes isopropylalcohol.
12. A cleaning preparation according to Claim 1 substantially as hereinbefore described.
1 3. A washing solution for washing vehicle windscreens and the like comprising a mixture of a cleaning preparation in accordance with any one of the preceding claims, and water, wherein the cleaning preparation comprises 1 to 20% by volume of the washing solution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7927769A GB2027736A (en) | 1978-08-11 | 1979-08-09 | Cleaning Preparation for Glass Surfaces |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7833020 | 1978-08-11 | ||
GB7927769A GB2027736A (en) | 1978-08-11 | 1979-08-09 | Cleaning Preparation for Glass Surfaces |
Publications (1)
Publication Number | Publication Date |
---|---|
GB2027736A true GB2027736A (en) | 1980-02-27 |
Family
ID=26268512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7927769A Withdrawn GB2027736A (en) | 1978-08-11 | 1979-08-09 | Cleaning Preparation for Glass Surfaces |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2027736A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994019441A1 (en) * | 1993-02-24 | 1994-09-01 | Ing. Thor Marcus Kjemiske As | Washing method and composition |
-
1979
- 1979-08-09 GB GB7927769A patent/GB2027736A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994019441A1 (en) * | 1993-02-24 | 1994-09-01 | Ing. Thor Marcus Kjemiske As | Washing method and composition |
US5704991A (en) * | 1993-02-24 | 1998-01-06 | Ing. Thor Marcus Kjemiske As | Washing method and composition |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |