ES2464716T3 - Cleaning cloths by rubbing glasses - Google Patents

Abstract

Use of a hard surface cleaning cloth, comprising a substrate and an aqueous composition, for cleaning glasses glasses, in particular plastic, containing the aqueous composition - at least one alcoholic solvent, - an alkyl pyrrolidone and - up to 0 , 1% by weight of at least one anionic surfactant.

Description

Cleaning cloths by rubbing glasses

The object of the present invention is the use of a hard surface cleaning cloth comprising a substrate and an aqueous composition for cleaning glasses glasses. In this regard, the glasses crystals can also be coated with a nanorecoating.

In society, the number of glasses users is increasing. This has contributed, on the one hand, modified living and working conditions and, on the other hand, both improved medical diagnostic methods and greater social acceptance of the use of glasses. A large part of the population constantly uses optical aids, in addition many depend on glasses for special tasks such as, for example, reading or screen work. Additionally, sunglasses, with or without corrective glasses, are considered an important fashion accessory.

15 While the glasses crystals have been originally carved from mineral glass, more and more plastic crystals are currently being used. The advantage lies in both the lower weight and the lower tendency to break; on the contrary, the greater scratch sensitivity is disadvantageous. Both to improve the scratch resistance and to grant other desirable properties, therefore, glasses glasses made from duroplastic materials are often coated, as a rule, with hydrophobic nanorecoats.

The cleaning cloths for corrective and sun glasses enjoy a growing popularity on the part of the consumer, since they allow a quick cleaning in any place and at any time. However, cleaning glasses coated glasses poses some problems to the user, since such crystals can only be wetted

25 with difficulty, or not at all, with conventional surfactant / solvent mixtures. Until now, only agents with a very high part of surfactant have been used for cleaning such glasses glasses. However, embedded cleaning cloths of such agents leave drops on the surface. If these drops containing surfactant with a second clean cloth are not removed by polishing, then annoying circular residues of surfactant remain on the glass. However, the need for a second cloth opposes the user comfort of single-use cleaning cloths. In addition, some types of coating are attacked by the usual ingredients of the cleaning agents, such that the coating wears out over time.

Therefore, a cleaning agent without residues or at least with few residues, whose few residues would be

35 they will dry transparently and influence only a small degree, ideally at all, on the index of refraction of the glasses crystals. At the same time, the humectant should be solvent compatible. It should be able to be used in a damp cleaning cloth, which allows a comfortable cleaning without residue of a glass without subsequent polishing with a second dry cloth. Therefore, the objective of the present invention was to provide a cleaning cloth for glasses that had a good cleaning performance even with nanorecoated plastic crystals and, at the same time, care for the coating.

EP1974715 discloses an impregnating solution for embedded cleaning cloths, in particular cloths for cleaning by rubbing glasses, containing water, ethanol and pyrrolidoncarboxylic acid ester (PCA ester), in addition surfactants, for example anionic surfactants such as lauroylsarcosinate of sodium.

45 It was found that a combination of active principles of alkylpyrrolidone (ideally 1-octyl-2-pyrrolidone), solvent and reduced amounts of surfactants and water, applied on a paper cloth or microfibers, resolves the contradictions described above .

Therefore, the purpose of the application is the use of a hard surface cleaning cloth comprising a substrate and an aqueous composition, the latter containing at least one alcoholic solvent, an alkyl pyrrolidone and up to 0.1% by weight of at least an anionic surfactant.

With the cleaning cloth used according to the invention, a clearly improved wetting of

55 glasses glasses made from polycarbonates, for example, polydialyldiglycol carbonates. In this respect it does not play any role if the crystals have a coating. As other advantages it should be mentioned that the humectant in the aqueous composition is not fixed on the substrates used, in such a way that it remains effective even after an extended storage and does not form any film, or at least a transparent one, in such a way that the optical properties of the glasses are not altered. Nor is the glass anti-reflection treatment due to the aqueous composition damaged.

Within the framework of the present invention, fatty acids or fatty alcohols or their derivatives - unless otherwise indicated - are found as representatives of branched or unbranched carboxylic acids or alcohols or their derivatives with, preferably, from 6 to 22 carbon atoms The former are particularly preferred because of their plant base as based on regenerable raw materials for ecological reasons, however, without limiting the teaching according to the invention thereto. In particular, also the oxoalcohols

or its derivatives obtainable, for example, according to ROELEN oxosynthesis can be used accordingly.

Provided that alkaline earth metals are hereinafter referred to as counterions for monovalent anions, 5 this means that the alkaline earth metal is naturally present only in half of the amount of substance - sufficient for the compensation of charges - in relation to the anion.

Substances that also serve as ingredients of cosmetic agents are referred to below, where appropriate, in accordance with the International Nomenclature Cosmetic Ingredient (INCI) nomenclature (International Nomenclature of Cosmetic Ingredients). The chemical compounds have an INCI denomination in the English language, the vegetable ingredients are listed exclusively according to Linné in the Latin language. The so-called common names such as "water", "honey" or "sea salt" are also indicated in the Latin language. The INCI designations can be obtained from the "International Cosmetic Ingredient Dictionary and Handbook, Seventh Edition (1997)" which is edited by The Cosmetic, Toiletry and Fragrance Association (CTFA), 1101, 17th

15 Street NW, Suite 300, Washington, DC 20036, USA and that it contains more than 9,000 INCI denominations as well as references to more than 37,000 commercial names and technical denominations including the corresponding distributors from more than 31 countries. The International Cosmetic Ingredient Dictionary and Handbook assigns ingredients one or more chemical classes (Chemical Classes), for example "Polymeric Ethers" (polymeric ethers) and one or more functions (Functions), for example "Surfactants - Cleansing Agents" (surfactants) cleaning agents) which, in turn, explains in more detail. They, if necessary, are also referred to below.

The CAS indication indicates that in the case of the following sequence of numbers it is a name of the Chemical Abstracts Service. Unless explicitly stated otherwise, the amounts indicated in

25 percentage by weight (% by weight) refer to the entire agent. In this respect, these percentage indications of quantities refer to active contents.

Alkylpyrrolidone

The aqueous composition used in the cleaning cloth used according to the invention contains an alkyl pyrrolidone. In this regard, suitable alkylpyrrolidones have a C6-16 alkyl chain, in particular a C8-18 alkyl chain. In this regard, 1-octyl-2-pyrrolidone is particularly preferred. This is available, for example, under the trade name Surfadone® LP-100 at International Specialty Products. The alkyl pyrrolidone is preferably used in amounts of 0.001 to 0.1% by weight, particularly

35 preferably in amounts of 0.005 to 0.05% by weight.

Alcoholic solvent

In addition, the composition contains at least one alcoholic solvent. Preferably, this solvent is selected from the group comprising C1-6 alcohols, C2-6 diols and mixtures thereof, in particular selected from the group comprising ethanol, isopropanol, n-propanol, n-butanol, ethylene glycol, diethylene glycol, propylene glycol as well. as mixtures thereof, particularly preferably ethanol, isopropanol, n-propanol as well as mixtures thereof.

The following compounds named according to INCI are illustrative solvents: alcohol (ethanol), n-butyl alcohol, t-butyl alcohol, butylene glycol, diethylene glycol, dipropylene glycol, ethylhexanediol, glycol, hexanediol, 1,2,6-hexanedriol, hexyl alcohol, hexylene glycol , isopentyldiol, isopropanol (isopropyl alcohol INCl), methyl alcohol, methylpropanediol, neopentyl glycol, pentylene glycol, propanediol, propyl alcohol (n-propanol), propylene glycol, tetrahydrofurfuryl alcohol, trimethylhexanol.

Preferably, the aqueous composition contains alcoholic solvents, in particular selected from the group comprising ethanol, n-propanol, isopropanol as well as mixtures thereof in amounts of 30 to 70% by weight, preferably 40 to 60% by weight.

55 Anionic Surfactants

The aqueous composition also contains an anionic surfactant. Preferred anionic surfactants in the context of the present invention are C8-C18 monoalkylsulfates (in particular fatty alcohol sulfates), C8-C18 alkyl polyglycol ether sulfates (fatty alcohol ether sulfates) with 2 to 6 ethylene oxide (OE) units in the part of ether, C8-C20 alkanesulfonates, C8-C18 N-sarcosinates as well as C8-C18 N-acyltaurides. In addition, C8-C18 a-olefinsulphonates, sulfonated C8-C18 fatty acids, in particular dodecylbenzenesulfonate, C8-C22 carboxylic acid amide ether sulfates, C8-Cle mono- and dialkyl ester of sulfosuccinic acid, C8 alkyl polyglycol carboxylates can also be used -C18 and C8-C18 alkylisethionates or mixtures thereof. Preferably, fatty alcohol sulfates, fatty alcohol ether sulfates, secondary alkyl sulphonates, sarcosinates and / or taurides are used. On the contrary, the use of linear alkylbenzenesulfonates is not preferred. Anionic surfactants are preferably used as sodium salts, but may also be contained as other alkali metal salts or

alkaline earth, for example magnesium salts, as well as in the form of ammonium or mono-, di-, tri- or tetraalkylammonium salts, in the case of sulfonates also in the form of their corresponding acids, for example, dodecylbenzenesulfonic acid.

5 fatty alcohol sulfates

As alkyl sulfates (fatty alcohol sulfates, SAG), alkali metal and, in particular, sodium salts of the sulfuric acid half esters of C12-18 fatty alcohols are preferred, for example coconut fat alcohol, fatty alcohol of tallow, lauryl, myristyl, cetyl or stearyl alcohol or of the C10-20 oxoalcohols and the secondary alcohol half esters of these chain lengths. In addition, alkyl sulfates of the aforementioned chain length are preferred, containing a synthetic, straight-chain, petrochemical-based alkyl moiety, which have a degradation behavior analogous to suitable compounds based on fat chemistry raw materials. In this regard, C10-C16 alkyl sulfates are particularly preferred, in particular C12-14 alkyl sulfates. In addition, alkyl sulfates with alkyl chains can also be used

Branched once or several times or cyclic alkyl moieties. The fatty alcohol sulfates are usually used as alkali metal, alkaline earth and / or mono-, di- or trialkanolammonium salt and / or but also in the form of their corresponding acid to neutralize in situ with the corresponding alkali metal hydroxide, hydroxide alkaline earth metal and / or mono-, di- or trialkanolamine. In this case, potassium and in particular sodium alkali metals, calcium and in particular magnesium alkaline earth metals, and mono-, di- or triethanolamine alkanolamines are preferred. In this respect, fatty alcohol sulfates are preferably used, above all, sodium lauryl sulfate or monoethanolamine.

Fatty alcohol ether sulfates

25 Alkylene ether sulfates (fatty alcohol ether sulfates, INCI alkylene ether sulfates) are products of sulfation reactions in alkoxylated alcohols. In this regard, the general expert by alkoxylated alcohols understands the reaction products of alkylene oxide, preferably ethylene oxide, with alcohols, within the meaning of the present invention preferably with longer chain alcohols, that is, with aliphatic alcohols. straight-chain or branched once or several times, acyclic or cyclic, saturated or mono- or polyunsaturated, preferably straight-chain, acyclic, saturated, with 6 to 22, preferably 8 to 18, in particular 10 to 16, and particularly preferably 12 to 14 carbon atoms. As a general rule, from n moles of ethylene oxide and one mole of alcohol, depending on the reaction conditions, a complex mixture of addition products of different degrees of ethoxylation is produced (n = 1 to 30, preferably 1 to 20, in particular 1 to 10, particularly preferably 2 to 4). Another embodiment of the alkoxylation consists in the use of mixtures of

35 alkylene oxides, preferably from the mixture of ethylene oxide and propylene oxide. Within the meaning of the present invention, low ethoxylation fatty alcohols with 1 to 4 ethylene oxide (OE) units, in particular 1 to 2 OE, for example 2 OE, such as C12-14 fatty alcohol, are particularly preferred. Na + 2OE-sulfate.

Particularly preferred anionic surfactants are fatty alcohol sulfates, such as sodium lauryl sulfate, fatty alcohol ether sulfates, such as sodium lauryl ether sulfate with 2 OE, secondary alkyl sulphonates, sarcosinates, taurides as well as mixtures thereof. The agent contains anionic surfactants in amounts of up to 0.1% by weight, in particular up to 0.005% by weight.

Other surfactants

The aqueous composition, in addition to anionic surfactants, may also contain other substances with surface activity (surfactants), in particular of the non-ionic surfactants class.

In this case, long-chain alkyl polyglycosides with 8 to 14 C atoms in the alkyl part and 1 to 3 glycoside units as well as silicone polyether are suitable as non-ionic surfactants. An example of such surfactants is coconut alkyl polyglucoside with, on average, 1.4 glucose units. In a preferred embodiment, however, the aqueous composition is free of non-ionic surfactants.

Other ingredients

In addition to the aforementioned components, the aqueous composition may contain other adjuvants and additives such as are customary in such agents. To this belong, in particular, odoriferous substances (scented oils), antistatic agents, preservatives, corrosion inhibitors, complexers for alkaline earth metal ions, UV absorbers and electrolyte salts. The amount of such additives is usually not more than 1% by weight of the composition. The lower limit of employment depends on the type of additive. Thus, the aqueous composition may contain, for example, up to 0.5% by weight, preferably up to 0.25% by weight of perfume. Preferably, the total amount of adjuvants is below 1% by weight.

65 The pH value of the composition is preferably in a range of 6 to 11, extraordinarily preferably 7 to 10.5.

The composition can be prepared by mixing directly from its raw materials, subsequent intermingling and subsequent rest of the agent until the absence of bubbles.

As a substrate for the aqueous composition, a single-use cloth is used. Preferably a 5 paper cloth or microfiber is used. On the contrary, plastic nonwovens are not suitable as substrates.

By papers it is meant a flat material, essentially composed of fibers mainly of plant origin, which is formed by dehydration of a suspension of fibrous substance on a sieve. In this respect a fiber felt is produced, which is then compacted and dried. The weight generally amounts to up to 225 g / m2.

10 The fibrous substances that form the main part of the paper are obtained, above all, from wood. Depending on the special production procedures, properties and purpose of use, different types of paper are distinguished, for example, banknote paper, tub paper, tissue paper, writing paper, photo paper, toilet paper or even paper crepe. In the case of the latter, these are paper varieties that have been made dilatable and flexible by means of wet or dry correspondence. For this, during paper production instead of

15 The drying cylinders commonly used in the battery of dryers are called so-called cylindrical cylinders, these are steam-heated cylinders on which the paper web is stressed by means of a corresponding scraper and in this respect is substantially shortened. Crepe papers are used, for example, as toilet papers, for example as household cloths.

20 Microfibers are textile fibers, for example of polyesters, polyamides or polytetrafluoroethylene that are produced during spinning of spinning nozzles with many perforations when high-speed spinning air nozzle is blown to the tip of the spinning nozzle short The microfibers obtained in this way with an average fineness of 0.1 to 0.3 dtex are processed to give a so-called microfibre tangle with an extremely small pore width (1 dtex = 1 g / 10,000 m). The reduced pore width serves to,

25 for example, raindrops cannot penetrate the fabric, while water vapor can escape, such that a simultaneously breathable and water-tight cloth is produced.

Among the cloths of paper are particularly suitable those of crepe paper, in particular cellulose crepe paper, as they are offered, for example, by the companies NeuKaliss, Schoeller & Hösch, Lenk as well as Kimberly-Clark.

30 Preferred crepe papers have a weight of 20 to 50 g / m2. In this regard, microfiber cloths with a weight of 30 to 80 g / m2 can be used.

The substrate is embedded in the aqueous composition and preferably packaged individually. In this regard, the aqueous composition is preferably applied in an amount of 20 to 55 g / m2 on the substrate.

Therefore, a process for the production of a cleaning cloth can be carried out, in which a substrate, preferably selected from the group comprising paper cloths, in particular crepe paper, and microfiber cloths, is embedded in a composition aqueous containing at least one alcoholic solvent, preferably selected from the group comprising ethanol, n-propanol, isopropanol and mixtures thereof, a

Alkyl pyrrolidone, preferably 1-octyl pyrrolidone, up to 0.1% by weight of at least one anionic surfactant and, if necessary, perfume. In this regard, the amount of application of the composition on the substrate is preferably from 20 to 55 g / m2.

Examples

In total, seven aqueous compositions were formulated and embedded in the same crepe paper cloths with a 1: 1 mass ratio. In this regard, compositions E1 to E3 could be used in accordance with the invention. Comparative formulation V1 had too high a surfactant content, the other comparative formulations V2 to V4 were free of alkyl pyrrolidone derivatives. Then the cloths

50 cleaners were used for cleaning hydrophobic glasses glasses, which had been provided with pigmented grease dirt, and for the assessment of cleaning performance and residue formation they were subjected to a visual assessment. Compositions E1 to E3 were shown to have the best relationship between cleaning performance and residue formation.

55 Table 1: impregnation liquids on crepe paper (liquid mass ratio / 1: 1 cloth)

Composition E1 E2 E3 V1 V2 V3 V4

1-octyl-2-pyrrolidone 0.01 0.01 0.15 0.01 --- Ethanol 60 60 60 60 60 60 60 Perfume 0.25 0.25 0.25 0.25 0.25 0.25 0 , 25 Anionic surfactant 0.001 -0.01 0.4 0.4 0.01

until until until until until until

Water

100 100 100 100 100 100 100

Cleaning performance in pigmented grease dirt on hydrophobic plastic crystals (visual assessment)

++ + ++ ++ ++ + or

Residue on hydrophobic plastic crystals (visual assessment)

++ ++ + - - - or

The indications of quantities in this respect are in% by weight of active substance.

Claims (9)

1. Use of a hard surface cleaning cloth, comprising a substrate and an aqueous composition, for the cleaning of glasses glasses, in particular plastic, containing the aqueous composition 5

-

 at least one alcoholic solvent,

-

 an alkyl pyrrolidone and

-

 up to 0.1% by weight of at least one anionic surfactant.

Use according to claim 1, characterized in that the substrate is preferably selected from the group comprising paper cloths, in particular crepe paper with a weight of 20-50 g / m2 and microfiber cloths with a weight from 30 to 80 g / m2. 3. Use according to one of claims 1 to 2, characterized in that the alkyl pyrrolidone is 1-octyl-215 pyrrolidone. 4. Use according to one of the preceding claims, characterized in that the alcoholic solvent is preferably selected from the group comprising ethanol, n-propanol, iso-propanol as well as mixtures thereof and preferably in amounts from 30 to 70% by weight, preferably 40 to 60% by weight. 5. Use according to one of the preceding claims, characterized in that the aqueous composition contains an alkyl pyrrolidone, preferably 1-octyl-2-pyrrolidone, in amounts of 0.001 to 0.1% by weight, preferably 0.005 to 0.05 % in weigh. Use according to one of the preceding claims, characterized in that the aqueous composition contains up to 0.5% by weight, preferably up to 0.25% by weight of perfume. 7. Use according to one of the preceding claims, characterized in that the aqueous composition contains one or more anionic surfactants, preferably selected from the group comprising sulfates of 30 fatty alcohol, fatty alcohol ether sulfates, secondary alkyl sulphonates, sarcosinates, taurides as well as mixtures thereof in amounts of up to 0.1% by weight, preferably up to 0.005% by weight. 8. Use according to one of the preceding claims, characterized in that the aqueous composition is free of surfactants. 35 9. Use according to one of the preceding claims, characterized in that the aqueous composition is applied in an amount of 20-55 g / m2 on the substrate according to claim 2. 10. Use according to one of the preceding claims, characterized in that the cleaning cloth is packaged individually. 11. Use according to one of the preceding claims, characterized in that the glasses crystals can have a nanorecoating.