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
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/34—Organic compounds containing sulfur
  • C11D3/3427—Organic compounds containing sulfur containing thiol, mercapto or sulfide groups, e.g. thioethers or mercaptales
• • 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
  • C11D3/26—Organic compounds containing nitrogen
  • C11D3/32—Amides; Substituted amides
  • C11D3/323—Amides; Substituted amides urea or derivatives thereof
• • 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
  • C11D7/32—Organic compounds containing nitrogen
  • C11D7/3272—Urea, guanidine or derivatives thereof
• • 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
  • C11D7/34—Organic compounds containing sulfur
• • 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
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/044—Hydroxides or bases
• • 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

Definitions

• the present invention relates to an aqueous hair-dissolving composition comprising one or more thioglycolates and urea.
• the invention also relates to the use of an aqueous composition according to the invention for dissolving hair and/or as a pipe or drain cleaner.
• the invention also relates to a method for dissolving hair.
• Blockages caused by hair in particular are difficult to remove in practice; Although some known agents (chemical drain cleaner compositions) are available for chemical drain cleaning with little or no mechanical use, these agents generally do not meet the requirements of a sustainable, resource-saving economy.
• Chemically acting drain cleaners are easy-to-use and also cost-effective alternatives to mechanical measures for removing blockages in sewage pipes.
• the forms of drain cleaners known from the prior art and available on the market range from powders or granules to "liquid" (ie comparatively low-viscosity liquid) or "gel-like” (ie higher-viscosity liquid) agents.
• the various dosage forms of conventional (chemically acting) drain cleaners often have a more or less highly alkaline formulation base in common, which is formed by ingredients with a strong alkaline effect, such as sodium hydroxide or caustic soda.
• the high alkalinity primarily causes the complex dirt clogs to swell, and on the other hand it also causes at least partial chemical hydrolysis of compounds contained in the deposits (e.g. hydrolysis of the triglycerides of fatty deposits).
• a deposit in the sewage pipe can in some cases be loosened or loosened by the drain cleaner used to such an extent that excess water can flow away freely again or the deposit loosened and/or loosened by the drain cleaner can be flushed with water from the Sewage line can be removed and thus the blockage caused by the deposit in the sewer line is eliminated.
• the chemical effect of such conventional drain cleaners is often regarded as insufficient; Hair has proven to be particularly resistant to the chemical effects of such drain cleaners.
• the performance of solid drain cleaners is often further increased by adding these more or less fine aluminum granules.
• an alkaline substance such as sodium hydroxide
• water With the simultaneous presence of an alkaline substance, such as sodium hydroxide, and water, the aluminum granules are formed in a manner known per se dissolved by gaseous hydrogen and the deposit in the sewage pipe (e.g. a blockage mainly caused by hair) is additionally mechanically loosened by the gas development.
• an oxyhydrogen mixture can form from the resulting hydrogen and oxygen in the air, which can occur if an ignition spark occurs at the same time carries the risk of an explosion or a deflagration in the sewage pipe.
• an effective oxidizing agent which scavenges the hydrogen
• a typical oxidizing agent that is highly effective in this regard is a nitrate salt, for example sodium nitrate (so-called chile nitrate) with nitrogen in the +5 oxidation state, which is reduced in the course of the reaction to form ammonia with nitrogen in the lowest oxidation state -3. Avoiding the risk described involves additional effort and the use of additional chemicals, which is increasingly perceived as disadvantageous.
• Common liquid or gel drain cleaners are often based on diluted caustic soda and are therefore generally also highly alkaline.
• conventional gel-like drain cleaners ie liquid compositions with comparatively high viscosity
• sodium hypochlorite sodium hypochlorite
• Such compounds within the formulations of gel-form drain cleaners cause both swelling and oxidation of the oxidizable components of deposits contained in sewage pipes, as a result of which these compounds have a dual function of dissolving or loosening deposits.
• Such compounds also have a deodorizing effect.
• drain cleaners containing hypochlorite tend to be chemically unstable and are therefore in some cases used with suitable stabilizers and a reserve of alkali provided to avoid bloating of the container used for storage or distribution.
• permanently elevated ambient temperatures and direct exposure to sunlight should be avoided during storage of the above-mentioned drain cleaner; completely opaque bottles are often used for this purpose.
• the effect of said drain cleaners containing oxidizing agents under practical conditions on hair is often felt to be insufficient.
• the caps of the corresponding products are not only designed to be childproof, but also allow targeted degassing thanks to the special internal membranes.
• thioglycolates salts of thioglycolic acid (hereinafter also referred to as thioglycolates) by reductive cleavage of keratin Disulfide bridges in the keratin of hair promote their dissolution.
• the present invention is based in part on the knowledge obtained in our own investigations that blockages in sewage pipes, which are mainly caused by deposits of hair, can in some cases be removed again by the use of drain cleaners based on thioglycolates.
• thioglycolates are sensitive to oxidation, especially at high pH values, and should therefore not be combined with the usual components (alkaline substances, oxidizing agents) of drain cleaners in the interests of longer shelf life and high effectiveness.
• the document DE 199 33 968 A1 discloses an aid for skin opening and hair loosening of animal skins, which in aqueous solution contains 10 to 50% by weight of a polysaccharide solution, 5 to 25% by weight of a mercaptocarboxylic acid or one of its salts and 1 to 10% by weight of a mercapto alcohol or contains one of its alkali salts.
• the document DE 40 38 693 A1 discloses an agent for reducing the growth or removal of hair on the human body, which contains a basic substance for application to the skin, in particular demineralized and sterilized water, and urea (urea).
• the document U.S. 4,587,032 A discloses a drain cleaner composition
• a drain cleaner composition comprising (i) about 5% to about 20% by weight of an organic solvent selected from the group consisting of lactones, pyrrolidinones, their derivatives and mixtures thereof, (ii) about 1% to about 10% by weight of a thioorganic A compound (preferably a thioglycolate) for breaking down protein fibers, (iii) about 1% to about 5% by weight of a surfactant, (iv) about 10% to about 25% by weight of a water-soluble thickener, and (vi) about 50 to about 80% by weight water.
• a drain cleaner compositions do not contain any strongly acidic or alkaline ingredients.
• the safety data sheet of the product "Veet ® Natural Inspirations TM Hair Removal Cream” discloses the composition of a depilatory cream comprising 5-10% by weight urea and 3 to 7% by weight of potassium thioglycolate.
• EP125801 and DE10066097 reveal drain cleaner.
• Depilatories containing urea and thioglycolate are out KR20080001056 and JPH06192056 known.
• the aqueous composition to be specified should preferably not be irritating to the eyes or skin or even caustic, so that a corresponding hazard label is not required.
• the aqueous composition to be specified should be mildly alkaline at best (ie the pH of the aqueous composition should not be greater than 11.5).
• the aqueous composition to be specified should preferably be able to exert its effect directly on the usual blockages of pipes or drains, which are essentially caused by hair or hair deposits.
• an aqueous hair-dissolving composition containing one or more thioglycolates.
• the invention is therefore directed towards an active substance which, when viewed in isolation, is found to be quite problematic, especially at higher concentrations.
• thioglycolates in combination with urea represent an excellent combination of active substances which is particularly suitable for the purposes of the present invention.
• the invention is essentially based on the surprising finding that a combination of thioglycolate ions with urea in the specified mass ratio and taking into account the specified upper concentration limits combines a surprisingly strong ability to dissolve hair with a surprisingly low risk potential.
• urea acts like an additive which surprisingly increases the hair-dissolving properties of the thioglycolate or thioglycolates. This property of urea was previously unknown.
• urea itself has properties that soften horn and is therefore used in high concentrations (e.g.
• urea can damage keratin-based structures and especially hair does not dissolve; In particular, however, it does not dissolve hair in an aqueous solution with a low use concentration of only 10% by weight or less.
• our own investigations have shown that hair treated with a corresponding aqueous urea solution absorbs water and the effective weight of the hair thus increases. A corresponding swelling effect would of course only aggravate an existing pipe blockage in practical use.
• a concentration of urea of more than 6% by weight no longer promotes the dissolving of hair.
• a mass ratio of urea to the total mass of thioglycolate ions of more than 14:1 no longer contributes to improved dissolving of hair.
• the aqueous composition of the present invention is a solution; however, the presence of a suspended (emulsified and/or dispersed) phase or phases is not ruled out.
• the viscosity of the preferred aqueous composition is therefore higher than the viscosity of water, so the user uses a comparatively viscous aqueous composition.
• the handling corresponds to the handling of usual highly viscous and liquid drain cleaners.
• An aqueous composition according to the invention is preferred (in particular an aqueous composition according to the invention, as described above or below as preferred) in which the density of the composition at 25° C. is greater than 1.0 g/mL and preferably between 1. 0 g/mL and 1.4 g/mL, preferably between 1.0 g/mL and 1.2 g/mL, particularly preferably between 1.0 g/mL and 1.1 g/mL, determined using the swing tube method.
• the density of an aqueous composition according to the invention is therefore preferably higher than the density of water. This has the effect that a preferred aqueous composition according to the invention, after being poured into a drain pipe, sinks down this pipe and (in the presence of a usual blockage) comes into contact with the hair causing the blockage.
• urea is known to be an efficiently active hydrotropic substance and such hydrotropic substances often contribute to reducing a viscosity present before they are added.
• An aqueous composition according to the invention (preferably an aqueous composition according to the invention as described above or below as preferred) which has a pH in the range from 8 to 12, preferably in the range from 10 to 12, particularly preferably in the range from 11.0 to 11.4.
• Such mildly alkaline aqueous compositions according to the invention contribute, in the manner explained above, to the fact that fats or the like present in addition to the hair to be primarily treated are hydrolyzed; as a result, a particularly good cleaning result is achieved in many practical applications.
• Corresponding drain cleaners are particularly versatile.
• Sodium lauryl ether sulfate and PEG-4 rapeseedamide are preferred.
• Sodium lauryl ether sulfate (English: sodium laureth sulfate) has the CAS number 68891-38-3
• PEG-4 rapeseedamide possesses the CAS number 85536-23-8
• Alkali metal and/or alkaline earth metal halides are preferably used as “electrolytes”, with sodium chloride (NaCl) preferably being used as the electrolyte.
• NaCl sodium chloride
• the selection of the electrolyte influences the viscosity and the density of the respective aqueous composition according to the invention.
• dyes encompasses any substances which, as a component of an aqueous composition according to the invention, influence its colouring.
• the or at least one of the dyes used is selected from the group consisting of water-soluble natural and synthetic dyes and pigments that are approved for food and / or cosmetics according to the Food and Feed Code (LFGB, E numbers list) and / or Annex IV of Regulation (EC) No. 1223/2009 of the European Parliament and of the Council of November 30, 2009 on cosmetic products.
• scents can be used as “scents” (scents).
• the or at least one of the fragrances used is selected from the group consisting of natural and synthetic fragrances, preferably extracts of flowers (lily, lavender, rose, jasmine, neroli, ylang-ylang), extracts of stems and leaves (geranium, patchouli, petitgrain), extracts of fruits (anise, coriander, caraway, juniper), extracts of fruit peel (bergamot, lemon, orange), extracts of roots (mace, angelica, celery, cardamom, costus, iris, Calmus), extracts of wood (pine, sandalwood, guaiac, cedar, rosewood), extracts of herbs and grasses (tarragon, lemongrass, sage, thyme), extracts of needles and branches (spruce, fir, pine, mountain pine), extracts of resins
• the selection of the counter cation to the anionic thioglycolate ion is determined by the technical aim of the present invention.
• cations should be used which are compatible with the other components of the aqueous composition according to the invention and do not pose a health risk when used in the home, for example.
• Ammonium, alkali metal cations and alkaline earth metal cations are preferred.
• Ammonium and alkali metal cations are particularly preferred.
• the use of sodium ions and ammonium is very particularly preferred. In practice, preference is therefore given in particular to an aqueous composition according to the invention, in which one or one of the several thioglycolates is sodium thioglycolate. Potassium and ammonium thioglycolate are somewhat less preferred due to their slightly higher aggressiveness.
• An aqueous composition according to the invention preferably does not comprise any of the usual strong oxidizing agents which are frequently contained in conventional drain cleaners.
• An aqueous composition according to the invention therefore particularly preferably contains no hypochlorite and particularly preferably no sodium hypochlorite. In this way it is avoided that the oxidation-sensitive thioglycolate is oxidized during storage or use.
• the present invention also relates to the use of an aqueous composition according to the invention (as defined above and/or in the claims, preferably in an embodiment specified as preferred) for dissolving hair and/or as a pipe or drain cleaner.
• the present invention therefore preferably relates to the use of an aqueous composition according to the invention for dissolving hair and as a pipe or drain cleaner. All of the above statements on preferred aqueous compositions according to the invention also apply in connection with the use according to the invention.
• the use relates to dissolving hairs in a (possibly clogged) pipe or drain.
• the aqueous composition used in the method according to the invention preferably comprises hydroxides (for hydrolysis of fatty acids or the like) and/or customary fat-dissolving agents (e.g. customary fat-dissolving surfactants).
• the method according to the invention is preferably used when hair-containing impurities are to be dissolved in a tube and/or hair-containing impurities are to be removed from a tube, the impurities containing one or more substances in addition to hair, which are selected from the group consisting of fats, oils, other substances containing keratin and paper.
• aqueous composition according to the invention Before, at the same time or after using an aqueous composition according to the invention (as defined in the claims, as described above and preferably as described above as preferred), the person skilled in the art will carry out further measures to dissolve and/or remove the hair-containing impurities in or from the pipe , if this appears necessary. Additional mechanical measures are preferably taken, e.g. B. as explained above. However, additional chemical measures can also be carried out and, in particular, chemical pipe or drain cleaners can be used. Such a combination of measures may be necessary in particular if hair is a major cause of a pipe or drain blockage, but there are also such large amounts of fats and/or oils that simply treating the hair does not lead to the desired cleaning success.
• the hair-dissolving power of inventive and non-inventive aqueous compositions was determined.
• the aqueous compositions examined each contained the components specified in Table 1 in the amounts specified there and the amounts of sodium thioglycolate and urea specified in Table 2.
• Table 1 Basic components of the investigated aqueous compositions according to the invention and not according to the invention.
• component Proportion [% by weight] Sodium Hydroxide (Hydroxide) 0.33 Sodium Lauryl Ether Sulfate (Surfactant) 2.80 PEG-4 Rapeseedamide (surfactant) 0.25
• a standardized Caucasian hair mixture was added to a mixture consisting of 250 mL of an inventive or non-inventive aqueous composition according to Table 2 and 250 mL of water.
• the mixture obtained after dilution of the aqueous composition according to the invention or not according to the invention according to Table 2 with 250 mL water itself represents an inventive or not according to the invention aqueous composition, the mixture obtained after dilution (compared to the aqueous composition according to Table 2) having lower concentrations of sodium thioglycolate and/or urea.
• After adding another 250 mL of hot water it was stirred and the hair mixture was left in the resulting mixture for 8 hours. The remaining hair was then sieved off, rinsed well with warm water, dried at 40° C. to constant weight and then weighed.
• composition I a comparative composition without sodium thioglycolate and without urea
• the equation for determining the hair dissolving power is therefore as follows: 100 ⁇ Dimensions hair after 8th H exposure time under use from composition X Dimensions hair after 8th H exposure time under use from composition I ⁇ 100 ⁇ u>Table 2: ⁇ /u> Hair dissolving power of compositions according to the invention and not according to the invention.
• compositions II which contained only thioglycolate (compositions II) or only urea (compositions III)
• compositions III it can also be seen quantitatively in a higher use of exclusively thioglycolate or exclusively urea does not come close to achieving the hair-dissolving power that results from a combination of both compounds.
• compositions not according to the invention which contain urea but no thioglycolate (compositions III)
• negative values for the hair-dissolving power can also be observed, on the contrary, since the presence of urea without thioglycolate in a composition during the exposure time leads to water absorption (swelling) and thus to leads to an increase in weight of the hair mixture, which is not completely compensated for by the drying that takes place before the amount of hair is weighed out.
• compositions II-1, III-1 and IV-2 are particularly impressive.
• the hair-dissolving power for composition II-1 is 3.2%
• the hair-dissolving power for composition III-1 is -3.2%, so that with a purely additive effect with a combination of 1.0% by weight of sodium thioglycolate (cf. II-1 ) with 5.0% by weight of urea (cf. III-1) a value of 0% for the hair dissolving power would be expected.
• composition IV-2 which contains 1.0% by weight sodium thioglycolate and 5.0% by weight urea, has a hair dissolving power of 17.2%.
• the experimentally determined hair dissolving power for composition IV-2 is not the mere additive result of the individual hair dissolving powers as determined for compositions II-1 and III-1.
• compositions II-1, III-2 and IV-4 A comparison of the results for compositions II-1, III-2 and IV-4 is just as impressive.
• the addition of the hair dissolving powers for compositions II-1 and III-2 gives a value of -2.2%.
• a hair dissolving power of 22.6% is measured for composition IV-4, which contains 1% by weight sodium thioglycolate and 10.0% by weight urea.

Landscapes

• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Cosmetics (AREA)

Applications Claiming Priority (2)

Publications (3)

Family

ID=65951579

Family Applications (1)

Country Status (5)

Citations (2)

Family Cites Families (7)

• 2018
  • 2018-04-27 DE DE102018110284.4A patent/DE102018110284A1/de not_active Withdrawn
• 2019
  • 2019-03-26 EP EP19713777.1A patent/EP3784764B1/de active Active
  • 2019-03-26 PL PL19713777.1T patent/PL3784764T3/pl unknown
  • 2019-03-26 ES ES19713777T patent/ES2949788T3/es active Active
  • 2019-03-26 WO PCT/EP2019/057492 patent/WO2019206544A1/de not_active Ceased

Patent Citations (2)

Non-Patent Citations (3)

Also Published As

Similar Documents

Legal Events