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
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/0026—Low foaming or foam regulating compositions
• • 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
  • C11D1/38—Cationic compounds
  • C11D1/42—Amino alcohols or amino ethers
  • C11D1/44—Ethers of polyoxyalkylenes with amino alcohols; Condensation products of epoxyalkanes with amines

Definitions

• the invention relates to the use of end-capped alkylaminopolyethylene glycol ethers as foam-suppressing additives in low-foam cleaning agents.
• Aqueous cleaning agents intended for use in trade and industry, in particular those for cleaning metal, glass and ceramic and plastic surfaces, as a rule contain substances which are able to counteract undesirable foam development.
• foam-suppressing additives is due to the fact that the contaminants detached from the substrates and accumulating in the cleaning baths act as foaming agents.
• anti-foaming agents may also be necessary due to the fact that the cleaning agents themselves contain constituents which give rise to undesirable foaming under the given working conditions, for example anionic surfactants or nonionic surfactants foaming at working temperature.
• the invention relates to the use of end-capped alkylaminopolyethylene glycol ethers of the formula I below as foam-suppressing additives for low-foam cleaning agents in which R represents an alkyl or alkenyl radical having 6 to 20 carbon atoms, R1 and R2 independently of one another alkyl radicals having 1 to 8 carbon atoms, m and n independently of one another are numbers from 3 to 20, with the proviso that the sum of m and n 5 to 25.
• the radicals R, R1 and R2 can be straight-chain or branched.
• R is preferably a straight-chain alkyl radical or a 2-position methyl-branched alkyl radical (oxosynthesis radical) having 8 to 18 carbon atoms.
• Suitable radicals are octyl, decyl, dodecyl, tetradecyl, hexodecyl and octadecyl radicals and mixtures thereof, as they are present in synthetic mixtures or obtained from natural fat raw materials, e.g. B. coco alkyl residues or tallow alkyl residues.
• the radicals R1 and R2 preferably have 3 to 6 and in particular 3 or 4 carbon atoms. Examples of these are propyl, i-propyl, butyl and i-butyl radicals.
• the indices m and n are preferably 3 to 10, their sum preferably being 5 to 15.
• the compounds can be prepared in a manner known per se, for example by ethoxylating alkylamines of the formula R - NH2, converting the polyglycol ethers formed into the alkali metal alcoholates and reacting them with alkyl chlorides or alkyl bromides (WILLIAMSON etherification).
• the etherification can be carried out with an excess of alkyl halide, which is removed again by distillation after the reaction has ended.
• the etherification can be carried out, for example, at 60 to 120 ° C. and, depending on the temperature selected, takes about 1/2 to 6 hours.
• the compounds of formula I obtained are colorless in pure form and liquid at room temperature.
• the compounds of the formula I can be used on their own or in combination with other foam inhibitors, in particular with polyethylene glycol ethers, such as those obtained by adding 4 to 20 parts by weight of ethylene oxide to 1 part by weight of polyglycerol with a hydroxyl number in the range from 900 to 1200 and subsequent etherification of the free Hydroxyl groups with alkyl halides with 4 to 8 carbon atoms are available and are described in DE-PS 33 15 952 (D 6562).
• the compounds to be used according to the invention are liquid at room temperature. They are characterized by high alkali and acid stability and very effective foam inhibition in weakly acidic to strongly alkaline cleaning solutions.
• the cleaning agents in which the compounds of the formula I are used according to the invention can contain the constituents customary in such agents, such as wetting agents, builders and complexing agents, alkalis or acids, corrosion inhibitors and, if appropriate, also antimicrobial active substances and / or organic solvents.
• Non-ionic surface-active substances such as polyglycol ethers, which are obtained by addition of ethylene oxide to alcohols, in particular fatty alcohols, alkylphenols, fatty amines and carboxamides, and anionic surfactants, such as alkali metal, amine and alkylolamine salts of fatty acids, alkylsulfonic acids, alkylsulfonic acids and alkylbenzenesulfonic acids, come as wetting agents Consider.
• the cleaning agents can especially alkali metal orthophosphates, polymer phosphates, silicates, borates, carbonates, polyacrylates and gluconates as well as citric acid, nitriloacetic acid, ethylenediaminetetraacetic acid, 1-hydroxyalkane-1,1-diphosphonic acids and aminotronic acid (aminotri- acid), aminotronic acid Ethylenediaminetetra- (methylenephosphonic acid), phosphonoalkane polycarboxylic acids such as B. phosphonobutane tricarboxylic acid and alkali metal salts of these acids.
• Highly alkaline cleaning agents in particular those for bottle cleaning, contain considerable amounts of caustic alkali in the form of sodium and potassium hydroxide. If special cleaning effects are desired, the cleaning agents can contain organic solvents, for example alcohols, gasoline fractions and chlorinated hydrocarbons and free alkylolamines.
• cleaning agents are once understood to mean the aqueous solutions intended for direct application to the substrates to be cleaned.
• cleaning agent also includes the concentrates and solid mixtures intended for the production of the application solutions.
• the ready-to-use solutions can be slightly acidic to strongly alkaline.
• the compounds of the formula I to be used according to the invention are added to the cleaning agents in amounts such that their concentration in the ready-to-use solutions is 10 to 2500 ppm, preferably 50 to 500 ppm.
• test solutions which contained 1% by weight sodium hydroxide and 0.03% by weight (300 ppm) defoamer. These solutions were added in the course of the tests in increments of 100 ppm increasing amounts of triethanolamine tetrapropylene benzene sulfonate as a test foam.
• a stable, stable mixture of active substances of the following composition was obtained by mechanical mixing of the components: 80 pbw sodium tripolyphosphate 20 GT product according to Example 6
• Beer bottles were cleaned at 85 ° C in a bottle cleaning system with three lye zones and an hourly output of 80,000 bottles.
• the beer bottles were labeled with paper labels using casein glue, which would otherwise cause excessive foaming in the immersion baths. If 1.5% by weight sodium hydroxide solution containing 0.15% by weight of the active substance mixture described above was used as the cleaning solution, the system could be operated without disruptive foaming.
• a detergent concentrate of the following composition was prepared by dissolving the components in phosphoric acid: 5 pbw of aminotri- (methylenephosphonic acid) 10 pbw of 1-hydroxyethane-1,1-diphosphonic acid 5 pbw of phophonobutane tricarboxylic acid 27 GT product according to example 1 3 GT product B 10 pbw of ethanol 40 pbw of phosphoric acid, 75% by weight
• a storage-stable cleaning agent of the following composition was produced by mechanical mixing of the components for cleaning metallic surfaces by spraying: 80 pbw sodium metasilicate pentahydrate 16 pbw sodium tripolyphosphate 4 GT coconut amine + 12 EO 1 GT product according to Example 1
• a mechanical degreasing agent for metallic materials with the following composition was produced by mechanical mixing of the components: 40 pbw sodium metasilicate pentahydrate 35 GT sodium carbonate 20 pbw sodium tripolyphosphate 2.5 pbw of sodium alkylbenzenesulfonate 2.5 pbw of nonylphenol + 14 EO 4.5 pbw product according to example 1 0.5 GT product B
• a storage-stable concentrate for cleaning metal surfaces with the following composition was prepared by dissolving the components in water: 30 pbw of sodium caprylate 10 GT borax 14 pbw sodium tripolyphosphate 10 pbw of triethanolamine 2 pbw of monoethanolamine 6 GT product according to example 1 78 GT water

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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)
• Detergent Compositions (AREA)

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• 1986
  • 1986-05-02 DE DE19863614825 patent/DE3614825A1/de not_active Withdrawn
• 1987
  • 1987-04-24 EP EP87106038A patent/EP0243907A3/fr not_active Withdrawn
  • 1987-04-30 US US07/044,927 patent/US4744923A/en not_active Expired - Fee Related
  • 1987-05-01 JP JP62109625A patent/JPS62263295A/ja active Pending

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