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(11) | EP 3 165 592 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | COMPOSITION |
(57) The present invention relates to an aqueous glass and dish washing composition for
removing stains, in particular lipstick residues.
[0001] The present invention relates to an aqueous glass and dish washing composition for removing stains, in particular lipstick residues. The present invention is intended for, but not limited to, commercial use in automatic glass and dish washing machines in restaurants and public houses.
[0002] Conventional glass and dish washing compositions include a wide variety of active ingredients which work to break down dried and burnt on food and beverage stains. Common active ingredients include surfactants, alkali salts, bleaching agents, chelating agents, enzymes, antibacterial agents, optical brightening agents, builders and perfumes.
[0003] Surfactants work to reduce the surface tension or interfacial tension between two liquids or a liquid and a solid. Surfactants usually contain both hydrophobic groups and hydrophilic groups which adsorb at interfaces between oil and water. The hydrophobic groups interact with the oil and the hydrophilic groups interact with the water to form aggregates such as micelles which inhibit the oil droplets from merging into fewer larger droplets. There are many different types of surfactant such as anionic, cationic, zwitter-ionic, non-ionic and bio surfactants.
[0004] Alkali salts such a potassium or sodium hydroxide emulsify grease and adjust the pH of the water to provide optimum conditions for cleaning glasses and dishes. Conventional glass and dish washing compositions for use in a commercial setting have high alkalinity which has been associated with damaging glasses and dishes.
[0005] Chelating agents such as ethylene diamine tetra-acetate (EDTA) or citric acid combine with metal ions such as magnesium and calcium found in hard water. This prevents the metal ions from interacting with the surfactant and becoming less effective. Builders such as sodium carbonate or sodium silicate can be used as a less expensive alternative to chelating agents.
[0006] Optical brightening agents are compounds which absorb light in the ultraviolet and violet part of the electromagnetic spectrum and re-emit the light in the blue region. They are often used in conventional glass and dish washing compositions to provide a cleaner and brighter appearance.
[0007] Despite being effective in the removal of general stains such as food and beverage debris, conventional glass and dish washing compositions are less effective in removing lipstick residues from glasses and dishes. This is because lipsticks may contain pigments, oils, waxes and antioxidants which are hydrophobic in nature and difficult to remove.
[0008] Other drawbacks encountered when using conventional glass and dish washing compositions include flat beer/poor head retention and lacing, streaks and spots left on glasses and etching of glasses.
[0009] WO-A-98/04660 relates to a glass washing composition for removing lipstick residues from glassware. The glass washing composition comprises a non-ionic surfactant in a suitable solvent such as water. A co-solvent (for example isopropyl alcohol) may also be present.
[0010] The present invention aims to overcome or substantially mitigate certain drawbacks of conventional glass washing compositions by providing a blend of two alkoxylated alcohols or of an alkoxylated alcohol and isopropyl alcohol in combination with sodium bicarbonate.
[0011] Thus viewed from a first aspect the present invention provides an aqueous glass and dish washing composition comprising:
sodium bicarbonate in an amount in the range 1 to 5% (w/w);
a first alkoxylated alcohol in an amount in the range 1 to 20% (w/w); and
a second alkoxylated alcohol in an amount in the range 1 to 20% (w/w) or isopropyl alcohol in an amount in the range of 5 to 10% (w/w).
[0012] The aqueous glass and dish washing composition of the present invention advantageously removes dried and burnt on food and beverage stains including lipstick residues without leaving streaks or damaging the ware and with desirable anti-bacterial properties. This is achievable at moderate temperature without substantial protein build-up and without a rinse aid. Moreover the aqueous glass and dish washing composition of the present invention advantageously provides good beer head retention and lacing inside glasses. Without wishing to be bound by theory, these advantages are thought to be attributable to sodium bicarbonate acting as a very efficient water softener and as a superior wetting agent in the presence of the first alkoxylated alcohol and the second alkoxylated alcohol or isopropyl alcohol which ensure adequate detergent levels and cloud point.
[0013] By way of example of the advantageous nature of the invention, an automatic glass and dish washing machine using the aqueous glass and dish washing composition of the present invention has been found to use approximately 40 to 50% less electricity to complete a wash cycle. This is because the wash tank requires less heating as the machine is washing and rinsing with a composition which requires 75% less rinsing off.
[0014] The first alkoxylated alcohol may be a polymer. The first alkoxylated alcohol may be a copolymer (eg an alternating, periodic, statistical or block copolymer).
[0015] The first alkoxylated alcohol may contain ethylene oxide (EO) and/or propylene oxide (PO) moieties. The degree of ethoxylation may be 2 to 150 EO moieties. The degree of propoxylation may be 15 to 70 PO moieties. The EO moieties may form [EO]n blocks. The PO moieties may form [PO]n blocks.
[0016] Preferably the first alkoxylated alcohol contains EO-PO copolymer units. The EO-PO copolymer units may be alternating, periodic, statistical or block copolymer units.
[0017] The first alkoxylated alcohol may be an adduct of ethylene oxide and/or propylene oxide and an alcohol.
[0018] Preferably the first alkoxylated alcohol is an adduct of ethylene oxide and/or propylene oxide and a fatty alcohol.
[0019] Preferably the first alkoxylated alcohol is an adduct of ethylene oxide and propylene oxide and a C11-22-alcohol. Particularly preferably the first alkoxylated alcohol is an adduct of ethylene oxide and propylene oxide and a C12-15-alcohol. More preferably the first alkoxylated alcohol is an adduct of ethylene oxide and propylene oxide and a C13-15-alcohol.
[0020] Preferably the first alkoxylated alcohol is an adduct of an ethylene oxide/propylene oxide copolymer and a C11-22-alcohol. Particularly preferably the first alkoxylated alcohol is an adduct of an ethylene oxide/propylene oxide copolymer and a C12-15-alcohol. More preferably the first alkoxylated alcohol is an adduct of an ethylene oxide/propylene oxide and a C13-15-alcohol.
[0021] The molar ratio of alcohol to EO and/or PO in the adduct may be in the range 1:25 to 1:27 (eg about 1:26).
[0022] The first alkoxylated alcohol may be an ethylene oxide/propylene oxide block copolymer. The first alkoxylated alcohol may be a polaxamer.
[0023] The first alkoxylated alcohol may be an ethoxylated or propoxylated alcohol. The first alkoxylated alcohol may be an ethoxylated propoxylated alcohol. The first alkoxylated alcohol may be an ethoxylated propoxylated fatty alcohol.
[0024] Preferably the first alkoxylated alcohol is an ethoxylated propoxylated C11-22-alcohol. Particularly preferably the first alkoxylated alcohol is an ethoxylated propoxylated C12-15-alcohol. More preferably the first alkoxylated alcohol is an ethoxylated propoxylated C13-15-alcohol.
[0025] The first alkoxylated alcohol may be an alcohol alkoxylate (eg an alcohol ethoxylate, alcohol propoxylate or alcohol ethoxylate propoxylate). The first alkoxylated alcohol may be a fatty alcohol alkoxylate.
[0026] Preferably the first alkoxylated alcohol is a C11-22-alcohol ethoxylate propoxylate. Particularly preferably the first alkoxylated alcohol is a C12-15-alcohol ethoxylate propoxylate. More preferably the first alkoxylated alcohol is a C13-15-alcohol ethoxylate propoxylate.
[0027] Preferably the first alkoxylated alcohol is an ethylene oxide/propylene oxide copolymer based on a C13/C15 alcohol. An example is Synperonic LF/26.
[0028] Preferably the first alkoxylated alcohol is an ethoxylated propoxylated unbranched fatty alcohol. An example is Plurafac LF400.
[0029] Preferably the first alkoxylated alcohol is a fatty alcohol ethoxylate. An example is Synperonic NCA 830.
[0030] The first alkoxylated alcohol may have a hydrophilic-lipophilic balance in the range 8-12, preferably 9-11.
[0031] The first alkoxylated alcohol may be present in the range 1 to 15% (w/w), preferably in the range 2 to 10% (w/w), particularly preferably in the range 2 to 7% (w/w).
[0032] In a first preferred embodiment, the aqueous glass and dish washing composition comprises:
sodium bicarbonate in an amount in the range 1 to 5% (w/w);
a first alkoxylated alcohol in an amount in the range 1 to 20% (w/w); and isopropyl alcohol in an amount in the range of 5 to 10% (w/w).
[0033] Particularly preferably the first alkoxylated alcohol is an ethoxylated propoxylated fatty alcohol (eg Empilan PF7169).
[0034] In a second preferred embodiment, the aqueous glass and dish washing composition comprises:
sodium bicarbonate in an amount in the range 1 to 5% (w/w);
a first alkoxylated alcohol in an amount in the range 1 to 20% (w/w); and a second alkoxylated alcohol in an amount in the range 1 to 20% (w/w)
[0035] Typically the first alkoxylated alcohol is present in an amount which is less than the amount of the second alkoxylated alcohol. Preferably the weight ratio of the first alkoxylated alcohol to the second alkoxylated alcohol is 0.5:1 or less.
[0036] The second alkoxylated alcohol may be a polymer. The second alkoxylated alcohol may be a copolymer (eg an alternating, periodic, statistical or block copolymer).
[0037] The second alkoxylated alcohol may contain ethylene oxide (EO) and/or propylene oxide (PO) moieties. The degree of ethoxylation may be 2 to 150 EO moieties. The degree of propoxylation may be 15 to 70 PO moieties. The EO moieties may form [EO]n blocks. The PO moieties may form [PO]n blocks.
[0038] Preferably the second alkoxylated alcohol contains EO-PO copolymer units. The EO-PO copolymer units may be alternating, periodic, statistical or block copolymer units.
[0039] The second alkoxylated alcohol may be an adduct of ethylene oxide and/or propylene oxide and an alcohol.
[0040] Preferably the second alkoxylated alcohol is an adduct of ethylene oxide and/or propylene oxide and a fatty alcohol.
[0041] Preferably the second alkoxylated alcohol is an adduct of ethylene oxide and propylene oxide and a C11-22-alcohol. Particularly preferably the second alkoxylated alcohol is an adduct of ethylene oxide and propylene oxide and a C12-15-alcohol. More preferably the second alkoxylated alcohol is an adduct of ethylene oxide and propylene oxide and a C13-15-alcohol.
[0042] Preferably the second alkoxylated alcohol is an adduct of an ethylene oxide/propylene oxide copolymer and a C11-22-alcohol. Particularly preferably the second alkoxylated alcohol is an adduct of an ethylene oxide/propylene oxide copolymer and a C12-15-alcohol. More preferably the second alkoxylated alcohol is an adduct of an ethylene oxide/propylene oxide and a C13-15-alcohol.
[0043] The molar ratio of alcohol to EO and/or PO in the adduct may be in the range 1:29 to 1:31 (eg about 1:30).
[0044] The second alkoxylated alcohol may be an ethylene oxide/propylene oxide block copolymer. The second alkoxylated alcohol may be a polaxamer.
[0045] The second alkoxylated alcohol may be an ethoxylated or propoxylated alcohol. The second alkoxylated alcohol may be an ethoxylated propoxylated alcohol. The second alkoxylated alcohol may be an ethoxylated propoxylated fatty alcohol.
[0046] Preferably the second alkoxylated alcohol is an ethoxylated propoxylated C11-22-alcohol. Particularly preferably the second alkoxylated alcohol is an ethoxylated propoxylated C12-15-alcohol. More preferably the second alkoxylated alcohol is an ethoxylated propoxylated C13-15-alcohol.
[0047] The second alkoxylated alcohol may be an alcohol alkoxylate (eg an alcohol ethoxylate, alcohol propoxylate or alcohol ethoxylate propoxylate). The second alkoxylated alcohol may be a fatty alcohol alkoxylate.
[0048] Preferably the second alkoxylated alcohol is a C11-22-alcohol ethoxylate propoxylate. Particularly preferably the second alkoxylated alcohol is a C12-15-alcohol ethoxylate propoxylate. More preferably the second alkoxylated alcohol is a C13-15-alcohol ethoxylate propoxylate.
[0049] Preferably the second alkoxylated alcohol is an ethylene oxide/propylene oxide copolymer based on a C12/C15 alcohol. An example is Synperonic LF/30.
[0050] Preferably the second alkoxylated alcohol is an ethoxylated propoxylated unbranched fatty alcohol. An example is Plurafac LF403.
[0051] Preferably the second alkoxylated alcohol is a fatty alcohol ethoxylate. An example is Synperonic NCA 850.
[0052] The second alkoxylated alcohol may have a hydrophilic-lipophilic balance in the range 8-12, preferably 9-11.
[0053] The second alkoxylated alcohol may be present in the range 2 to 15% (w/w), preferably in the range 3 to 10% (w/w), particularly preferably in the range 3 to 7% (w/w).
[0054] The term "alcohol" used hereinbefore may refer to a linear or branched, primary or secondary or saturated or unsaturated alcohol. Each reference to "alcohol" is intended to mean a single alcohol or a mixture of alcohols each of which is as hereinbefore defined.
[0055] In a preferred embodiment, the first alkoxylated alcohol is a first alkoxylated mixture of alcohols (eg two alcohols). Preferably the first alkoxylated mixture of alcohols is a first alkoxylated mixture of C11-22-alcohols, particularly preferably C12-15-alcohols, more preferably C13-15-alcohols. Most preferably the first alkoxylated mixture of alcohols is a first alkoxylated mixture of a C12-alcohol and a C15-alcohol or of a C13-alcohol and a C15-alcohol.
[0056] In a preferred embodiment, the second alkoxylated alcohol is a second alkoxylated mixture of alcohols (eg two alcohols). Preferably the second alkoxylated mixture of alcohols is a second alkoxylated mixture of C11-22-alcohols, particularly preferably C12-15-alcohols, more preferably C13-15-alcohols. Most preferably the second alkoxylated mixture of alcohols is a second alkoxylated mixture of a C12-alcohol and a C15-alcohol or of a C13-alcohol and a C15-alcohol.
[0057] In a preferred embodiment, the first alkoxylated alcohol is an adduct of ethylene oxide and propylene oxide and a mixture of a C13-alcohol and a C15-alcohol and the second alkoxylated alcohol is an adduct of ethylene oxide and propylene oxide and a mixture of a C12-alcohol and a C15-alcohol.
[0058] The molecular weight of the first alkoxylated alcohol may be less than the molecular weight of the second alkoxylated alcohol.
[0059] The molecular weight ratio of the first alkoxylated alcohol to the second alkoxylated alcohol may be in the range 0.80:1 to 0.90:1, preferably 0.83:1 to 0.89:1, particularly preferably 0.85:1 to 0.87:1.
[0060] The molecular weight of the hydrophobe of the first alkoxylated alcohol may be less than the molecular weight of the hydrophobe of the second alkoxylated alcohol (eg by a factor of about 0.8 to 0.9, preferably about 0.87).
[0061] The degree of ethoxylation of the first alkoxylated alcohol may be less than the degree of ethoxylation of the second alkoxylated alcohol (eg by a factor of about 0.8 to 0.9, preferably about 0.87).
[0062] The degree of propoxylation of the first alkoxylated alcohol may be less than the degree of propoxylation of the second alkoxylated alcohol (eg by a factor of about 0.8 to 0.9, preferably about 0.87).
[0063] The hydrophilic-lipophilic balance of the first alkoxylated alcohol may be less than the hydrophilic-lipophilic balance of the second alkoxylated alcohol (eg by a factor of about 0.8 to 0.9, preferably about 0.87).
[0064] Where the first alkoxylated alcohol is an adduct of ethylene oxide and/or propylene oxide and a fatty alcohol and the second alkoxylated alcohol is an adduct of ethylene oxide and/or propylene oxide and a fatty alcohol, the molar ratio of alcohol to EO and/or PO in the first alkoxylated alcohol may be greater than the molar ratio of alcohol to EO and/or PO in the second alkoxylated alcohol (eg by a factor of 1.1 to 1.2, preferably about 1.15).
[0065] The cloud point of the aqueous glass and dish washing composition may be in the range 9 to 15°C (eg about 12°C).
[0066] The first alkoxylated alcohol and second alkoxylated alcohol may be a Synperonic surfactant available from Croda (eg Synperonic LF/26, Synperonic LF/28, Synperonic LF/30, Synperonic LF/40, Synperonic NCA 810, Synperonic NCA 830 or Synperonic NCA 850), a Plurafac surfactant available from BASF (eg Plurafac LF 221, Plurafac LF 400, Plurafac LF 403, Plurafac 405, Plurafac 711, Plurafac 900 or Plurafac 1300), an Ethylan surfactant available from Akzo Nobel (eg Ethylan CPG7545, Ethylan 954 or Ethylan 1003) or an Empilan surfactant available from Huntsman (eg Empilan PF7169).
[0067] Sodium bicarbonate may be present in an amount in the range I to 3% (w/w), preferably in the range 1 to 2% (w/w).
[0068] The aqueous glass and dish washing composition may further comprise a co-solvent. Typically the co-solvent is present in an amount in the range 5 to 15% (w/w).
[0070] The co-solvent may be selected from the group consisting of isopropyl alcohol, an aliphatic hydrocarbon, an alicyclic hydrocarbon, a glycol and sodium cumene sulphonate or a mixture thereof (eg white spirit).
[0071] A preferred co-solvent is isopropyl alcohol. Isopropyl alcohol may be present in an amount in the range 5 to 10% (w/w). The presence of isopropyl alcohol in the aqueous glass and dish washing composition improves beer head retention and lacing.
[0072] The aqueous glass and dish composition may further comprise an optical brightening agent. The optical brightening agent may be a stilbene derivative.
[0074] The preservative may be selected from the group consisting of methyl paraben, Kathon CG (Dow Chemical Company) and Nipasept (Aako BV) or a mixture thereof.
[0075] The aqueous glass and dish washing composition may further comprise a builder to soften the water.
[0076] The builder may be selected from the group consisting of citric acid, a dicarboxylic acid, adipic acid, succinic acid and glutaric acid or a salt or mixture thereof.
[0078] The foam suppressant may be selected from the group consisting of N-methyl hexadecanamide, N-methyl octadecanamide, N-ethyl hexadecanamide and N-propyl heptadecanamide or a mixture thereof.
[0080] The viscosity regulator may be selected from the group consisting of isopropyl alcohol, ethanol and urea or a mixture thereof.
[0082] The aqueous glass and dish washing composition in use is dispensed into a rinse aid and advantageously no detergent is required. The aqueous glass and dish washing composition may operate most effectively when the temperature of the wash water is within the range 60 to 80°C, preferably at about 75°C. The aqueous glass and dish washing composition may operate most effectively when the temperature of the rinse water is about 55°C. The optimum dilution for the aqueous glass and dish washing composition may be approximately 600ppm.
[0083] A person skilled in the art will be familiar with methods for preparing an aqueous glass and dish washing composition of the present invention. For example, the aqueous glass and dish washing composition of the present invention may be prepared by adding the oily component including the alkoxylated alcohol surfactants to the co-solvent (if present) and heating to 75°C. The solvent may be separately heated to 75°C and then added to the oily components with high speed stirring. Any viscosity regulators, optical brightening agents, builders, preservatives or perfumes are added to the mixture as it begins to cool.
[0084] The present invention will now be described in a non-limitative sense with reference to Examples. Amounts referred to in the Examples are expressed as percentages (weight/weight).
Example 1
[0085]
Sodium bicarbonate 1.5%
Synperonic LF/26 (also known as LFRA 260) 2-6%
Synperonic LF/30 (also known as LFRA 30) 5-15%
Optical brightening agent 0.01%
Water (balance).
Example 2
[0086]
Sodium bicarbonate 1-2%
Synperonic LF/26 (also known as LFRA 260) 2.5%
Synperonic LF/30 (also known as LFRA 30) 2.5%
Optical brightening agent 0.01%
Water (balance).
Example 3
[0087]
Sodium bicarbonate 1.5%
Synperonic LF/26 (also known as LFRA 260) 1-4%
Synperonic LF/30 (also known as LFRA 30) 5-10%
Isopropyl alcohol 5-10%
Optical brightening agent 0.01%
Water (balance).
Example 4
[0088]
Sodium bicarbonate 1-3%
Synperonic LF/26 (also known as LFRA 260) 2-6%
Synperonic LF/30 (also known as LFRA 30) 5-15%
Optical brightening agent 0.01%
Water (balance).
[0089] The combination of sodium bicarbonate, Synperonic LF/30 and Synperonic LF/26 in Example 4 gave excellent cleaning.
Example 5
[0090]
Sodium bicarbonate 1-3%
Synperonic LF/26 (also known as LFRA 260) 1-4%
Synperonic LF/30 (also known as LFRA 30) 3-7%
Isopropyl alcohol 5-10%
Optical brightening agent 0.01%
Water (balance).
Example 6
[0092]
Sodium bicarbonate 1-5%
Synperonic LF/26 (also known as LFRA 260) 2-6%
Synperonic LF/30 (also known as LFRA 30) 5-15%
Optical brightening agent 0.01%
Water (balance).
[0093] Example 6 has super wetting and detergent qualities and a cloud point of approximately 12°C. Example 6 has a pH of approximately 8.
Example 7
[0095] An optical brightening agent is not required in Example 7 which is able to remove up to 100% of lipstick stains. Example 7 has super wetting and detergent qualities and a cloud point of approximately 12°C. Example 7 has a pH of approximately 8.
Example 8
[0096]
Sodium bicarbonate 1-5%
Empilan PF 7169 5-10%
Isopropyl alcohol 5-10%
Optical brightening agent 0.01%
Water (balance).
[0097] Example 8 has super wetting and detergent qualities and a cloud point of approximately 12°C. Example 8 has a pH of approximately 8.
Example 9
1. An aqueous glass and dish washing composition comprising:
sodium bicarbonate in an amount in the range 1 to 5% (w/w);
a first alkoxylated alcohol in an amount in the range 1 to 20% (w/w); and
a second alkoxylated alcohol in an amount in the range 1 to 20% (w/w) or isopropyl alcohol in an amount in the range of 5 to 10% (w/w).
2. An aqueous glass and dish washing composition as claimed in claim 1 wherein the first
alkoxylated alcohol contains EO-PO copolymer units.
3. An aqueous glass and dish washing composition as claimed in claim 1 or 2 wherein the
first alkoxylated alcohol is an adduct of ethylene oxide and/or propylene oxide and
a fatty alcohol.
4. An aqueous glass and dish washing composition as claimed in any preceding claim wherein
the first alkoxylated alcohol is an adduct of an ethylene oxide/propylene oxide copolymer
and a C12-15-alcohol.
5. An aqueous glass and dish washing composition as claimed in claim 1 wherein the first
alkoxylated alcohol is a fatty alcohol alkoxylate, preferably a C12-15-alcohol ethoxylate propoxylate.
6. An aqueous glass and dish washing composition as claimed in any preceding claim wherein
the first alkoxylated alcohol is an ethylene oxide/propylene oxide copolymer based
on a C13/C15 alcohol.
7. An aqueous glass and dish washing composition as claimed in claim 1 comprising:
sodium bicarbonate in an amount in the range 1 to 5% (w/w);
a first alkoxylated alcohol in an amount in the range 1 to 20% (w/w); and
isopropyl alcohol in an amount in the range of 5 to 10% (w/w).
8. An aqueous glass and dish washing composition as claimed in claim 1 comprising:
sodium bicarbonate in an amount in the range 1 to 5% (w/w);
a first alkoxylated alcohol in an amount in the range 1 to 20% (w/w); and
a second alkoxylated alcohol in an amount in the range 1 to 20% (w/w)
9. An aqueous glass and dish washing composition as claimed in claim 8 wherein the weight
ratio of the first alkoxylated alcohol to the second alkoxylated alcohol is 0.5:1
or less.
10. An aqueous glass and dish washing composition as claimed in either of claims 8 or
9 wherein the second alkoxylated alcohol contains EO-PO copolymer units.
11. An aqueous glass and dish washing composition as claimed in any of claims 8 to 10
wherein the second alkoxylated alcohol is an adduct of ethylene oxide and/or propylene
oxide and a fatty alcohol, preferably an adduct of an ethylene oxide/propylene oxide
copolymer and a C12-15-alcohol.
12. An aqueous glass and dish washing composition as claimed in claim 8 wherein the second
alkoxylated alcohol is a fatty alcohol alkoxylate, preferably a C12-15-alcohol ethoxylate propoxylate.
13. An aqueous glass and dish washing composition as claimed in any of claims 8 to 12
wherein the second alkoxylated alcohol is an ethylene oxide/propylene oxide copolymer
based on a C12/C15 alcohol.
14. An aqueous glass and dish washing composition as claimed in claim 1 wherein the first
alkoxylated alcohol is a first alkoxylated mixture of C12-15-alcohols, preferably a first alkoxylated mixture of a C13-alcohol and a C15-alcohol.
15. An aqueous glass and dish washing composition as claimed in claim 8 wherein the second
alkoxylated alcohol is a second alkoxylated mixture of C12-15-alcohols, preferably a second alkoxylated mixture of a C12-alcohol and a C15-alcohol.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.
Patent documents cited in the description