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
  • C11D1/66—Non-ionic compounds
  • C11D1/72—Ethers of polyoxyalkylene glycols
• • 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
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2075—Carboxylic acids-salts thereof
  • C11D3/2082—Polycarboxylic acids-salts 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
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2093—Esters; Carbonates
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
  • Y10S516/01—Wetting, emulsifying, dispersing, or stabilizing agents
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
  • Y10S516/01—Wetting, emulsifying, dispersing, or stabilizing agents
  • Y10S516/06—Protein or carboxylic compound containing
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S516/00—Colloid systems and wetting agents; subcombinations thereof; processes of
  • Y10S516/905—Agent composition per se for colloid system making or stabilizing, e.g. foaming, emulsifying, dispersing, or gelling
  • Y10S516/917—The agent contains organic compound containing oxygen
  • Y10S516/92—The compound contains repeating unsubstituted oxyalkylene

Definitions

• the invention relates to nonionic surfactants based on polyalkylene oxides or alkoxylation products of hydrophobic compounds containing -OH or -NH groups, which contain no or optionally only partially closed end hydroxyl groups and a low content of certain dicarboxylic acids or mixtures thereof Esters or ester mixtures are stabilized against discoloration due to decomposition, and the use of such color-stabilized nonionic surfactants in alkaline detergents and cleaning agents.
• alkaline-reacting framework substances such as phosphates, silicates, carbonates and, on the other hand, caustic alkalis are also contained.
• An essential and necessary component of such cleaner formulations in addition to any other additives such as, in particular, oxidizing and disinfecting agents, are also nonionic surfactants from the known classes of surfactants, the most important of which are: alkylene oxide copolymers and block polymers; alkoxylated ethylene or propylene polyamines or fatty alcohols, the alkylene oxide component consisting either of pure ethylene oxide or pure propylene oxide or both, and in the latter case the polyaddition can be carried out with the alkylene oxide gas mixture or in succession (in block form).
• the surfactants used are often those which, despite their good cleaning action, develop little foam Ze / BL '' or even have a foam-suppressing effect, but special problems can also require highly foaming surfactants.
• discolouration may occur. These mostly brown discolourations are due to chemical reactions between non-ionic surfactant, alkali and oxidizing substances such as atmospheric oxygen or chlorine carriers in the ready-made cleaner itself.
• the color changes can only be of an external nature without causing a change in the application properties. In the case of commercial products, which preferably end up in the household, an unappealing appearance hinders sales.
• the interaction between surfactant, alkali and oxidizing agent can go so far that changes in the application properties can be determined. It has been shown that the free hydroxyl groups of the nonionic surfactants are the target for alkali and oxidizing agents. For this reason, there has been no lack of efforts to convert the surfactants into alkali-stable derivatives by masking the hydroxyl group.
• Etherification with, for example, benzyl chloride or acetalization should be mentioned as essential examples. These operations then also provide nonionic endgroup-sealed surfactants that are sufficiently stable. However, the end group closure also causes a change in the physico-chemical properties. For example, the cloud point and solubility in water are reduced. From an economic point of view, it should be mentioned that the chemical reactions mentioned, which lead to end-capped nonionic surfactants, are not easy to carry out and therefore make the products more expensive. It should also be mentioned that the end group finally the biodegradability of such surfactants deteriorates. This can even go so far that legally prescribed minimum degradation rates are no longer met.
• the invention was therefore based on the object of searching for nonionic low-foam surfactants which, with otherwise unchanged application behavior, are stable against the action of strong alkalis and oxidizing agents.
• these compounds are aliphatic dicarboxylic acids having 4 to 8 carbon atoms, mixtures thereof, their C 1 -C 4 -alkyl esters or their mixtures.
• the color stabilizers are dissolved in the liquid, nonionic surfactant by stirring, expediently in the heat.
• 0.1 to 5% by weight of stabilizer is preferably added. Less than 0.1% by weight and more than 5% by weight mean no additional advantages. Additions of 0.5 to 3% by weight are of particular technical interest.
• nonionic surfactant is not liquid at room temperature, it is melted and proceeded as described. After the color stabilizer has dissolved in it, let it solidify again.
• the color-stabilized surfactants according to the invention can therefore be in liquid or solid form.
• the color-stabilized surfactants are mixed with the other components, in particular the alkaline builder substances mentioned at the outset and, if appropriate, other additives such as oxidizing agents, fragrances and colorants and disinfectants to prepare the cleaning formulations.
• other additives such as oxidizing agents, fragrances and colorants and disinfectants to prepare the cleaning formulations.
• the color stabilizers have been shown to be effective with almost all ethylene oxide and ethylene oxide / propylene oxide surfactants, i.e. no time-consuming tests are required to select special surfactants, for example.
• Cleaner formulations which contain the color-stabilized surfactants according to the invention generally comprise 70 to 99, preferably 90 to 99% by weight of inorganic alkaline builder and 30 to 1, preferably 10 to 1% by weight, based in each case on the entire formulation Surfactant together.
• the alkylene oxide adducts were tested in such a way that they were stored at different temperatures for 24 days with and without addition of stabilizer.
• the samples at room temperature (RT) were stored with and without addition of NaOH; Samples stored at 70 ° C. contained solid caustic soda. After this time, the iodine color number and the color of the caustic soda were determined.
• the table clearly shows the significantly improved color stability of the surfactants with the additives according to the invention compared to the unstabilized ones.

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• 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)
• Health & Medical Sciences (AREA)
• Emergency Medicine (AREA)
• Detergent Compositions (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

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Cited By (2)

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Citations (2)

• 1980
  • 1980-05-16 DE DE19803018714 patent/DE3018714A1/de not_active Withdrawn
• 1981
  • 1981-04-17 US US06/255,166 patent/US4412933A/en not_active Expired - Fee Related
  • 1981-05-02 AT AT81103314T patent/ATE4911T1/de not_active IP Right Cessation
  • 1981-05-02 EP EP81103314A patent/EP0040343B1/fr not_active Expired
  • 1981-05-02 DE DE8181103314T patent/DE3161110D1/de not_active Expired

Patent Citations (2)

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