GB2595918A

GB2595918A - Novel composition

Info

Publication number: GB2595918A
Application number: GB2008910.8A
Authority: GB
Inventors: Choudhary Jyoti; Saksena Skand; Singh Shivangi; Suri Gunjan
Original assignee: Reckitt and Colman Overseas Hygiene Home Ltd
Current assignee: Reckitt and Colman Overseas Hygiene Home Ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-12-15
Also published as: GB202008910D0; WO2021250397A1

Abstract

A liquid aqueous cleaning composition comprises an anti-static agent, a combination of non-ionic and anionic surfactants and is free from alcohols with up to 5 carbon atoms. The anti-static agent may be selected from surfactants including Crodastat 400, Servoxyl VPTZ 3/100, glycerol esters of fatty acides, alkoxylated fatty amines, ethoxylated tertiary amines, alkoxylated amides, derivatives of phosphoric acid and phosphates, sulphur containing compounds and sulfonated polymers. The non-ionic surfactants may be lauryl alcohol ethoxylates, polyglucosides, amine oxides and sorbitan esters. The anionic surfactants may be sodium lauryl sulfate, sodium laureth sulphate, sodium lauryl ether sulphate, alkyl benzene sulphonic acid, sec-alkane sulphonates and alcohol sulphates. The composition may further comprise preservatives, PH balancers or buffers, fragrances, dyes or biocidal agents. The composition may also be free from ammonia.

Description

Novel Composition The present invention is directed to a surface cleaning composition. In particular, the present invention is directed to a composition for cleaning the surface of an electronic device.

Formulations which are suitable for cleaning electronic gadgets are known. However, most of these formulations include harsh chemicals, such as alcohol or ammonia. For example, US 4 129 505 discloses an anti-static composition having 90 -98% w/w of ethanol.

In addition, these compositions are often somewhat ineffective in preventing dust from gathering on the surface of the electronic device.

The use of such compositions on the surface of the screen of an electronic device can result in damage to the casing which in turn can lead to damage to the internal components of the electronic device.

It would, therefore, be desirable to develop an effective formulation that does not include such harsh chemicals.

According to the present invention there is provided an aqueous cleaning composition in the form of a liquid which comprises an anti-static agent, a combination of non-ionic and anionic surfactants wherein the composition is alcohol-free.

Preferably the antistatic agent is present at a level of 0.02-1.0% w/w. More preferably the amount of antistatic agent is present at an amount of 0.05 -0.5% w/w. Most preferably, the amount of antistatic agent is present at an amount of 0.075 -0.15% w/w.

The anti-static agent can be selected from suitable non-ionic and anionic materials. Nonionic antistatic agents include esters, such as glycerol esters of fatty acids, amine derivatives such alkoxylated fatty amines and ethoxylated tertiary amines, amide derivatives such as alkoxylated amides. Anionic antistatic agents include compounds containing phosphorus such as derivatives of phosphoric acid (V) and phosphates (V), and sulphur-containing compounds such as sulphates (VI) and sulphonates. Preferred anti-static agents include sulfonated polymers and polymeric surfactants. Preferably, the anti-static agent can be selected from Crodastat 400 and Servoxyl VPTZ 3/100. More preferably, the material marketed as Crodastat 400 can be used as the anti-static material.

Preferably the level of the combination of non-ionic and anionic surfactants is from 0.1-2.5% w/w. More preferably, the level of surfactant is from 0.2-2.0% w/w. Even more preferably the level of surfactant is from 0.3 -1.5% w/w. Most preferably, the level of surfactant is from 0.5 -1.0% w/w.

The anionic surfactants can be selected from, but not restricted to, sodium lauryl sulfate, sodium lauryl ether sulphate, alkyl benzene sulphonic acid, sec-alkane sulphonates, alcohol sulphates or mixtures thereof.

The non-ionic surfactants can be selected from, but not restricted to, lauryl alcohol ethoxylates, polyglucosides, amine oxides, sorbitan esters or mixtures thereof.

Preferably the composition further comprises a preservative. The preservative is selected from, but not restricted to or combination of chloroisothiozolinone, methylchloroisothiozolinone, formaldehyde, phenoxyethanols, benzoic acid, sorbic acid or mixtures thereof.

Preferably, the preservative is present at a level of 0.001 -0.01% w/w.

The composition can include further excipients such as a buffer, fragrance, dye or biocidal agent.

The composition of the present invention can comprise 0.02-1.0% w/w of an antistatic agent, 0.1-2.5% w/w of a combination of non-ionic and anionic surfactants and water.

Preferably, the composition of the present invention can comprise 0.05-0.5% w/w of an antistatic agent, 0.2 -2.0% w/w of a combination of non-ionic and anionic surfactants and water.

More preferably, the composition of the present invention can comprise 0.075 -0.15% w/w of an antistatic agent, 0.3-1.5% w/w of a combination of non-ionic and anionic surfactants and water.

Most preferably, the composition of the present invention can comprise 0.075 -0.15% w/w of an antistatic agent, 0.5-1.0% w/w of a combination of non-ionic and anionic surfactants and water.

Preferably the composition further comprises a preservative at a level of 0.001 -0.01% w/w.

Preferably the composition does not include ammonia.

The composition can comprise 0.075 -0.15% w/w of an antistatic agent, 0.5-1.0% w/w of a combination of non-ionic and anionic surfactants, 0.05-0.5% w/w anti-fogging agent, 0.01-0.05% w/w pH balancer, 0.001 -0.005% w/w preservative and water.

The composition can consist essentially of 0.075 -0.15% w/w of an antistatic agent, 0.5 -1.0 % w/w of a combination of non-ionic and anionic surfactants, 0.05-0.5% w/w of an anti-fogging agent, 0.01-0.05% w/w of a pH balancer, 0.001 -0.005% w/w of a preservative and water.

The composition can consist essentially of 0.075 -0.15% w/w of an antistatic agent, 0.5 -1.0 % w/w of a combination of sodium lauryl sulphate and lauryl alcohol ethoxylate, 0.05 -0.5% w/w of an alcohol ethoxylate propoxylate, 0.01 -0.05% w/w of sodium bicarbonate, 0.001 -0.005% w/w of methyl chloroisothiazolinone-methylisothiazolinone and water.

The composition can have a pH ranging from 6 to 12.

For the avoidance of doubt, in the context of the present invention the term 'alcohol-free' means that the composition does not include an alcohol having up to 5 carbon atoms as a solvent.

For the avoidance of doubt, in the context of the present invention the amounts of each active component are based on the standard commercial preparations. For example, the amount of the sodium lauryl sulfate as given in Table 1 is based on the amount surfactant Galaxy 780 added to the composition.

20 25 30 The present invention will now be described in more detail with reference to the accompanying examples. The examples are not intended to be all inclusive or limit the scope of the invention.

Ingredients Ex 1 Ex 2 Ex 3 Ex 4 Ex 5 Ex 6 Galaxy MW 259 (96.7% minimum active) 0.3 0.3 0.3 0.3 0.3 0.3 Galaxy 780(28% active) 0.5 0.5 0.5 0.5 0.5 0.5 Berosol EC 0.1 0.1 0.1 0.1 0.1 0.1 Sodium Bicarbonate 0.01 0.01 0.01 0.01 0.01 0.01 Fragrance 0.05 0.05 0.05 0.05 0.05 0.05 Crodastat 400 0 0.02 0.05 0.1 0.2 0.5 Microcheck MZ 0.002 0.002 0.002 0.002 0.002 0.002 DI Water 99.038 99.018 98.988 98.938 98.838 98.538

Table 1

The compositions can be made as follows -An aqueous pre-mix of the Galaxy 259, Galaxy 780 surfactants and fragrance is prepared. The Crodastat 400 and Berosol EC are added to this mixture with additional water. An aqueous solution of sodium bicarbonate is added to the resulting mixture. Lastly, the Microcheck preservative is added with the required water to obtain the desired volume. The formulations shown in Table 1 were tested on the surface of an LED TV.

The key objective of the study was to find the optimum concentration of Crodastat 400 at which it shows effective dust repellant property.

The test was performed as follows: 1. The surface of the LED TV was divided into two equal parts. The one part was sprayed with 0.7m1 water 2 times and the other part was sprayed 2 times with an example formulation.

2. Both the parts were wiped with soft tissues to make sure the spread of the product is even throughout the screen surface and were allowed to dry.

3. The TV was left undisturbed in the normal conditions (atmospheric temperature and pressure) for one week.

4. On the 7th day, both the parts of the TV were wiped off by a wet tissue.

5. The tissues were visually observed for the dust accumulation on them.

6. Similarly, the experiment was repeated for all the other formulations as described in Table 2.

7. A visual inspection of the screen surface was performed.

The application of the compositions is set out in Table 2.

Test No. On left half of the TV On right half of the TV 1. water 0.00% (Ex 1) 2. 0.00% (Ex 1) 0.02% (Ex 2) 3. 0.02% (Ex 2) 0.05% (Ex 3) 4. 0.05% (Ex 3) 0.10% (Ex 4) 5. 0.10% (Ex 4) 0.20% (Ex 5) 6. 0.20% (Ex 5) 0.50% (Ex 6)

Table 2

The results of the tests carried out for each formulation are summarized in Table 3 below.

Concentration of Crodastat 400 (%) Effect on dust repellence on gadget screen Water High amount of dust accumulated 0.00 High amount of dust accumulated 0.02 Medium amount of dust accumulated 0.05 Low amount of dust accumulated 0.1 No dust accumulated 0.2 No dust accumulated 0.5 No dust accumulated

Table 3

As can be seen from the results shown in Table 3, the product showed better dust repellent property with an increase in the concentration of the Crodastat 400. Concentrations of 0.10% and above showed the best dust repellence.

A further study was carried out to confirm that the use of a formulation of the present invention to clean the screen of an electronic gadget does not cause any visual damage (e.g. any effect on picture quality such as double screen, half screen, any line or spot during viewing due to any kind of product penetration in the form of droplets) or physical damage (product residue streaks and scratches) during deleterious testing.

Before initiating the study, Day 0 observations were recorded for all appliances to be tested with respect to screen and electronics performance 0.7m1 of Example 4 in Table 1 was sprayed directly on all the appliances screen per spray.

The number of sprays applied to each screen is given in the Table 4 below: Appliances/ Approx. Product Anticipated Total No. of Days Anticipated Product Use (365 multiplied by appliance Shelf Total no. of anticipated sprays of product over its lifetime (No. of sprays per Surfaces shelf life (Years) No. of sprays life) use multiplied by Total per use no. of days) LED TV 5 Years 2 1825 3650 Laptop 4 Years 1 1460 1460 Smartphone 3 Years 1 1095 1095 (w/o screen guard)

Table 4

Each of the screens was tested over a period of 14 days.

During the test the screens were wiped with clean microfiber cloths. The same wipes were used for carrying out the testing on all the screens, without washing them during the test, to recreate real life usage scenario. All the appliances were switched off and unplugged before initiating the test except smart phone.

The protocol for the study was as follows: a) The formulation was directly sprayed in 'spray mode' (no. of sprays as mentioned above for each appliance respectively) and wiped/cleaned off using a microfiber cloth without any delay time.

b) The surface of the device was allowed to dry completely before repeating the process and to prevent buildup of the product on appliance's screen.

c) The process was repeated until the total number of sprays as shown in Table 5 was completed.

d) At the end of every day, the devices were checked for any 'deleterious effect' (performance) by switching them 'ON'.

e) The screen of each device was checked for any physical damage of the screen or picture quality such as double screen, half screen, any line or spot during viewing due to any kind of product penetration in the form of droplets.

The results of the testing are shown in Table 5 below: TEST SURFACE VISUAL/PHYSICAL DAMAGE

AFTER NO OF SPRAYS IN TABLE

ABOVE

Laptop Screen No LED TV Screen No Smart Phone without screen No guard

Table 5

As can be seen from the results shown in the Table 5 above, the composition of the present invention is safe to use on the screens of laptops, LED TV & smartphones. There was neither any change in the performance of the appliances nor any adverse effect on the surface of these appliances. The study was done using direct application of the product to depict "stress case scenario" on the screen of all the electronic appliances.

A further study was carried out to determine the difference in the drying time between the composition of the present invention (which is alcohol-free) and a known cleaner (which contains isopropyl alcohol or IPA). The study was performed on the screen of a LED TV.

The screen of a LED TV was sprayed once (0.7m1) with a known cleaner. The screen was then wiped 5 times with a microfiber cloth.

The formulation of the known cleaner is as follows: Ingredients Formulation Surfactants < 1% IPA <5% pH balancing agent <1% Fragrance <0.1% Water Q.S As soon as the screen was wiped, a timer was started to record the time taken (seconds) for the screen to dry completely. The process was repeated for a total of 10 times and the drying times were recorded. The results are shown in the Table 6 below: Drying Time (sec) Run No. Glass cleaner with IPA Formulation of the present invention 1 15.06 18.98 2 19.79 16.25 3 13.9 14.46 4 12.93 15.00 15.49 17.23 6 21.13 16.24 7 12.83 12.72 8 9.54 19.63 9 15.65 18.72 20.41 20.23 Average 15.67 16.95

Table 6

As can be seen from the results in the Table above, there is a negligible difference in the drying time (1.27 seconds) of the screen when wiped between the known product and the composition of the present invention. The absence of alcohol from the compositions of the present invention does not result in a longer drying time which would have been expected.

An advantage of the present invention is that there is provided a composition which is safe for cleaning the screens of electronic devices such as televisions, tablets, smartphones, computers, smartwatches, digital camera.

The composition of the present invention can clean greasy stains, dust & fingerprints, provide the screen with an anti-static and anti-fogging properties, leaves no streaks or residue, and is free from alcohol, ammonia, phosphates and other harsh chemicals.

The present invention is not intended to be limited to the exemplary embodiments described herein. Further modifications can be made without departing from the scope of the invention described herein.

Claims

CLAIMS: 1. An aqueous cleaning composition in the form of a liquid which comprises an anti-static agent, a combination of non-ionic and anionic surfactants wherein the composition is alcohol-free. 5 2. A composition as claimed in Claim 1 wherein the antistatic agent is present at a level of 0.02 -1.0% w/w.3 A composition as claimed in Claim 2 wherein the amount of antistatic agent is present at an amount of 0.05-0.5% w/w.4. A composition as claimed in Claim 2 or Claim 3 wherein the amount of antistatic agent is present at an amount of 0.075 -0.15% w/w.5. A composition as claimed in any of Claims 2 -4 wherein the anti-static agent is selected from nonionic antistatic agents include esters, such as glycerol esters of fatty acids, amine derivatives such alkoxylated fatty amines and ethoxylated tertiary amines, amide derivatives such as alkoxylated amides; anionic antistatic agents include compounds containing phosphorus such as derivatives of phosphoric acid (V) and phosphates (V), and sulphur-containing compounds such as sulphates (VI) and sulphonates; sulfonated polymers; and polymeric surfactants such Crodastat 400 and Servoxyl VPTZ 3/100.6 A composition as claimed in Claim 5 wherein the material marketed as Crodastat 400 is used as the anti-static material.7 A composition as claimed in any of preceding Claims wherein the level of the combination of nonionic and anionic surfactants is 0.1-2.5% w/w.8. A composition as claimed in Claim 7 wherein the level of surfactants is 0.2-2.0% w/w. 30 9. A composition as claimed in either Claim 7 or Claim 8 wherein the level of surfactants is 0.3-1.5% w/w 10. A composition as claimed in any of Claims 7 -9 wherein the level of surfactants is 0.5-1.0% w/w.11. A composition as claimed in any of the preceding Clams wherein the anionic surfactant is selected from, but not restricted to, sodium lauryl sulfate, sodium lauryl ether sulphate, alkyl benzene sulphonic acid, sec-alkane sulphonates, alcohol sulphates or mixtures thereof.12. A composition as claimed in any of the preceding Clams wherein the non-ionic surfactants is selected from, but not restricted to, lauryl alcohol ethoxylates, polyglucosides, amine oxides, sorbitan esters or mixtures thereof.13. A composition as claimed in any of the preceding Clams wherein the composition further comprises a preservative.14. A composition as claimed in Claim 13 wherein the preservative is selected from, but not restricted to or combination of, chloroisothiozolinone, methylchloroisothiozolinone, formaldehyde, phenoxyethanols, benzoic acid, sorbic acid or mixtures thereof.15. A composition as claimed in Claim 13 or Claim 14 wherein the preservative is present at a level of 0.001 -0.1% w/w.16. A composition as claimed in any of the preceding Claims wherein the composition includes further excipients such as a buffer, fragrance, dyes or biocidal agent.17. A composition as claimed in any of the preceding Claims wherein the composition comprises 0.02 -1.0% w/w of an antistatic agent, 0.1 -2.5% w/w of a combination of non-ionic and anionic surfactants and water.18. A composition as claimed in Claim 17 wherein the composition comprises 0.05-0.5% w/w of an antistatic agent, 0.2-2.0% w/w of a combination of non-ionic and anionic surfactants and water.19. A composition as claimed in either Claim 17 or Claim 18 wherein the composition comprises 0.075 -0.15% w/w of an antistatic agent, 0.3 -1.5% w/w of a combination of non-ionic and anionic surfactants and water.20. A composition as claimed in any of Claims 17-19 wherein the composition comprises 0.075 - 0.15% w/w of an antistatic agent, 0.5 -1.0% w/w of a combination of non-ionic and anionic surfactants and water.21. A composition as claimed in any of the preceding Claims wherein the composition further comprises a preservative at a level of 0.001 -0.01% w/w.22. A composition as claimed in any of the preceding Claims wherein the composition does not include ammonia.23. A composition as claimed in any of the preceding Claims wherein the composition consists essentially of 0.075 -0.15% w/w of an antistatic agent, 0.5-1.0% w/w of a combination of nonionic and anionic surfactants, 0.05-0.5% w/w of an anti-fogging agent, 0.01-0.05% w/w of a pH balancer, 0.001 -0.005% w/w of a preservative and water.24. A composition as claimed in any of the preceding Claims wherein the composition has a pH ranging from 6 to 12.