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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/88—Ampholytes; Electroneutral compounds
  • C11D1/90—Betaines

Definitions

• the invention relates to cleaning compositions and more particularly to compositions which are used in sanitary installations, for example toilet bowls.
• compositions which contain at least one acid, such as hydrochloric, phosphoric, sulfuric, acetic or fumaric acid.
• compositions containing hydrochloric acid are corrosive and dangerous and it is preferred to use weak acids.
• anionic and / or nonionic surfactants or other thickeners such as polyethoxylated amines or cellulose derivatives, such as carboxymethylcellulose, are commonly added.
• these thickeners require additives for their implementation, for example alcohols to dissolve the carboxymethylcellulose in water.
• the pH range must be chosen so that the introduction and the stability of the perfumes in the composition are not difficult. Indeed, pH below 1.5 leads to a breakdown of the constituents of most perfumes.
• the viscosity of such compositions must also be chosen so as to obtain a satisfactory descaling power and a persistence of the perfumes desired by the users.
• an insufficient viscosity does not allow the cleaning composition to adhere sufficiently to the walls, which reduces the contact time of the composition with the tartar.
• too high a viscosity prevents a diffusion of the perfume in the air surrounding the toilet or a diffusion in the stagnant water at the bottom of the toilet.
• An object of the invention is therefore to be able to provide a thickened acidic aqueous composition, not containing strong acid, but having a satisfactory descaling power.
• a second object of the invention is to provide such a descaling composition having a viscosity which can be adjusted to allow good adhesion to inclined walls and at the same time a diffusion of the perfume in the ambient atmosphere.
• a third object of the invention is to provide a thickened, scented acidic aqueous composition which is at the same time colored, clear and limpid, stable at room temperature and at + 40 ° C., for several months.
• Another object of the invention is to provide a descaling composition for cleaning sanitary facilities, comprising a single thickening surfactant, so as to reduce the manufacturing cost.
• thickening systems which consist of an amido-betaine of formula: in which R is an alkyl or alkenyl radical containing from 9 to 17 carbon atoms, n is an integer from 2 to 4, y is 0 or is an integer from 1 to 3, and a salt chosen from alkali or alkaline earth metal sulfates.
• compositions can be in the form of gels if a thickener is added to them, such as a surfactant, for example an ethoxylated nonylphenol, or such as a polymer, for example a cellulose derivative.
• a thickener such as a surfactant, for example an ethoxylated nonylphenol, or such as a polymer, for example a cellulose derivative.
• a betaine not comprising an amido group can, in the presence of weak acids, be thickened by halides or sulfates of alkali metals or alkaline earth.
• betaines selected by the applicant to thicken aqueous compositions containing at least one weak acid, in the presence of an alkali or alkaline earth metal halide are chosen from betaines having the following general formula: or the following general formula: in which R is a C9-C17 alkyl or alkenyl radical, x and y are independent of each other and are integers between 0 and 5.
• the betaines of formula III and IV not only thicken the aqueous weak acid compositions, and this in the presence of an alkali or alkaline earth metal halide, but also make it possible to disperse the perfumes which may be introduced at the end of mixing without separation into two phases.
• the fact of adding a perfume at the end of the formulation constitutes a great advantage for the manufacturer. Indeed, it can manufacture a mixture comprising no perfume and, with the same mixture, it can introduce at the final stage a perfume which it can vary according to the tastes and habits of the consumers.
• the betaines selected by the applicant also make it possible to obtain clear and clear compositions which are stable over time, at ambient temperature and up to + 40 ° C.
• the invention therefore relates to a thickened acidic aqueous composition for cleaning sanitary facilities, characterized in that it contains at least one betaine chosen from betaines having the formula (III) or (IV), at least one weak acid, at least one salt, optionally a perfume, optionally a bactericide, optionally a dye, and water.
• the salt / betaine weight ratio is preferably less than about 1.5: 1.
• the composition contains from 0.5 to 10% by weight of at least one betaine of formula (III) or (IV) and of 0, 1 to 15% by weight of at least one salt.
• It preferably contains from 2 to 8% by weight of at least one betaine of formula (III) or (IV), from 0.5% to 6% by weight of at least one weak acid, from 0.2 to 10% by weight of a salt.
• the weak acid is preferably chosen from formic, acetic, citric, lactic, succinic, gluconic, glutaric, adipic, malic acids or their mixtures.
• the salt can be chosen from chlorides, bromides, iodides and sulfates of alkali or alkaline earth metals.
• the composition is remarkable because it makes it possible to mix all the constituents and to add the perfume in the final stage.
• REWOTERIC AM-TEG betaine (manufactured by REWO, containing 35 to 40% betaine (III), 4.5% to 6.0% NaCl, qs 100% water).
• REWOTERIC AM-TEG betaine (manufactured by REWO, containing 35 to 40% betaine (III), 4.5% to 6.0% NaCl, qs 100% water).
• - 4 g HCl (37%) - 0.20 ml of dye (1% solution in water) - 0.25 ml of perfume - 0.53 g of bactericidal agent (50%) - qs 100 g of water.
• a composition is obtained having a viscosity of 150 m Pa.S, measured with an Epprecht viscometer, with a mobile 2, at a speed of 200 revolutions / minute.
• This composition is not viscous (less than 50 mPa.s).
• this example shows that betaine AMTEG mixed with weak acids does not make it possible to obtain a viscous composition.
• a composition is obtained having a viscosity of 160 mPa.s measured with mobile Epprecht 2, speed 200 revolutions / minute.
• This composition is clear and limpid, stable on storage.
• Example 1 is repeated, replacing the formic acid with acetic acid and adding 3 g of NaCl.
• a composition is obtained having a viscosity of 180 mPa.s, clear and limpid, stable.
• a 145 mPa.s viscosity composition is obtained containing 2% formic acid and 1% phosphoric acid.
• the amount of salt added must not be too large; in any case, it has been observed that the salt / betaine ratio must be less than 2: 1 and preferably equal to 1: 1.
• the amount of betaine must be greater than 3% by weight, preferably 3.6% by weight, and the amount of NaCl must be substantially equal, in% by weight.
• Example 3 The same mixture is carried out as in Example 3, but a mixture is introduced as acid: - 1/3 of glutaric acid - 1/3 adipic acid - 1/3 of succinic acid, sold by BASF under the trade name SOKALAN DCS.
• a viscosity of 200 mPa.s. is obtained.
• the following mixture is carried out: - 0.5% citric acid - 0.5% phosphoric acid - 2% formic acid - 3.6% betaine from the AM-TEG product (in 100%) - 0.002% dye - 0.265% bactericide - 3% NaCl - qs 100% water.
• a composition having a viscosity of 520 mPa.s.
• a viscosity of between 100 and 400 mPa.s is obtained.
• Example 3 The same mixing is carried out as in Example 3, but the order of introduction is modified, namely that the perfume is introduced at the end of formulation. A stable formula is obtained, the cloud point of which is greater than + 80 ° C.

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)
• Detergent Compositions (AREA)
• Cosmetics (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Catching Or Destruction (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

ID=9338774

Family Applications (1)

Country Status (8)

Cited By (4)

Families Citing this family (1)

Family Cites Families (4)

• 1986
  • 1986-09-08 FR FR8612571A patent/FR2603601B1/fr not_active Expired
• 1987
  • 1987-09-07 EP EP87420234A patent/EP0260205B1/de not_active Expired - Lifetime
  • 1987-09-07 AT AT87420234T patent/ATE83796T1/de not_active IP Right Cessation
  • 1987-09-07 ES ES87420234T patent/ES2044967T3/es not_active Expired - Lifetime
  • 1987-09-07 DE DE8787420234T patent/DE3783185T2/de not_active Expired - Lifetime
  • 1987-09-07 NO NO873732A patent/NO174674C/no unknown
  • 1987-09-08 DK DK469287A patent/DK170947B1/da active IP Right Grant
• 1993
  • 1993-03-23 GR GR930400627T patent/GR3007440T3/el unknown

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