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
  • C11D1/721—End blocked ethers
• • 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

Definitions

• the invention relates to the use of certain alkyl polyglycol ether mixed formals as anti-foaming agents in strongly alkaline cleaning agents.
• Industrial cleaning agents in particular those used in automatic systems for cleaning rigid surfaces such as metal, ceramic or glass, and in particular for bottle cleaning, should have a low level of foaming with a strong cleaning power.
• the industrial cleaning agents of the type mentioned are mostly products which contain strongly alkaline substances, such as, in particular, alkali metal hydroxides or also alkali metal silicates or alkali metal orthophosphates, individually or in a mixture. In the case of such products, high demands are placed on the defoamers not only with regard to the anti-foam effect but also with regard to the storage stability in the corresponding solid products.
• the storage stability is not always sufficient in the case of packaging, for example in solid cleaning agents which contain a very high alkali content, in particular more than 50% and more caustic alkali. It is also desirable that the anti-foaming agents have good biodegradability, are alkali-stable, so that they do not lose their effectiveness during the cleaning process under constant exposure to temperature.
• alkyl polyglycol ether mixed formals of the formula are used as anti-foaming agents in alkaline cleaning agents in which R is a straight-chain or branched alkyl or alkylene radical having 8 to 22 carbon atoms, R 2 is a straight-chain or branched alkyl radical having 1 to 5 carbon atoms, m is a number from 2 to 30 and n is a number from 1 to 3.
• R 1 is an alkyl radical having 12 to 18 carbon atoms
• R 2 is an alkyl radical having 2 to 4 carbon atoms
• m is an integer from 7 to 15
• n is 1.
• the alkyl polyglycol ether mixed formals of the formula given above which are used can be prepared, for example by reaction of fatty alcohol ethoxylate of the formula with a di-alkyl glycol formal of the formula in the presence of a strong acid, such as sulfuric acid, by heating to temperatures of about 150 ° C. for several hours.
• R 1 and R 2 have the same meaning as given in formula I.
• Suitable starting products for the fatty alcohol ethoxylates are straight-chain or branched aliphatic alcohols, such as hexadecyl, tetradecyl and octadecyl alcohols, and the corresponding branched iso alcohols.
• Branched aliphatic alcohols which can be prepared by the so-called Guerbet reaction (dimerization of primary alcohols) can also be used.
• synthetic fatty alcohols or mixtures thereof, such as those obtained in oxo synthesis can also be used.
• the strongly alkaline cleaning agents (pH above 10) contain sodium or potassium hydroxide in particular.
• other strongly alkaline substances such as alkali carbonate and alkali orthophosphates, are used alone or in a mixture with alkali hydroxides.
• the alkaline cleaning agents can also contain the usual constituents, such as alkali silicates, alkali borates, polymeric alkali phosphates and / or complexing agents, such as phosphonic acids, in particular 1-hydroxyethane-1,1-diphosphonic acid, aminotrimethylenephosphonic acid or 2-phosphonobutane-1, 2,4-tricarboxylic acid.
• the molar ratio of Na 2 0 or K 2 0: P 2 0 5 can be 1: 1 to 2: 1.
• sodium tripolyphosphate is used.
• Finely divided synthetically produced, water-insoluble, bound water-containing aluminosilicates of the general formula can also be used as substitutes for the polyphosphates in the cat a cation of valence n, preferably sodium, exchangeable for calcium, x a number from 0.7 to 1.5, preferably 0.9 to 1.3, and y a number from 0.8 to 6, preferably of 1 , 3 to 4, which have a calcium binding capacity of 50 to 200, preferably 100 to 200 mg CaO / g of the anhydrous aluminosilicate can be used.
• aluminosilicates can be crystalline or X-ray amorphous.
• the crystalline sodium aluminosilicates are preferred, in particular the zeolites A and X.
• alkali stable anionic surfactants such as alkyl and / or aryl sulfonates, are also suitable as constituents.
• the amount of antifoam added is about 0.1 to 1 g / l, based on the solution used. The amount added depends on the desired antifoam effect and the impurities or bath concentration of the cleaning agent.
• the cleaning agents are generally used with a bath concentration of 0.2 to 10% depending on the intended use.
• the application temperature is generally between 40 and 90 ° C.
• the cleaning agents prepared in this way were each stored in closed polypropylene containers at 45 ° C. and the defoamer tests were carried out at intervals of 2 weeks each.
• the free fall cycle method consists in heating 500 ml of cleaning solution to 60 ° C in a jacketed 2-1 measuring cylinder.
• this solution is brought into constant circulation at a throughput capacity of 4 l / minute so that the solution is sucked from the bottom of the measuring cylinder with a glass tube and in the second via a second glass tube with the 2000 ml mark of the measuring cylinder free fall is returned.
• a constant initial foam volume (for example 2,000 ml) is established.
• composition of the cleaning agents specified under a was used. Comparable results were obtained with the cleaning agents of composition b.

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)
• Degasification And Air Bubble Elimination (AREA)
• Polyurethanes Or Polyureas (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

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ID=6102215

Family Applications (1)

Country Status (15)

Families Citing this family (15)

Family Cites Families (10)

• 1980
  • 1980-05-12 DE DE19803018149 patent/DE3018149A1/de not_active Withdrawn
• 1981
  • 1981-04-13 DK DK166781A patent/DK166781A/da not_active IP Right Cessation
  • 1981-04-13 FI FI811131A patent/FI66900C/fi not_active IP Right Cessation
  • 1981-04-13 NO NO811284A patent/NO151244C/no unknown
  • 1981-04-27 US US06/257,855 patent/US4364777A/en not_active Expired - Fee Related
  • 1981-04-30 CA CA000376613A patent/CA1157736A/en not_active Expired
  • 1981-05-02 EP EP81103326A patent/EP0040713B1/de not_active Expired
  • 1981-05-02 AT AT81103326T patent/ATE5328T1/de not_active IP Right Cessation
  • 1981-05-02 DE DE8181103326T patent/DE3161415D1/de not_active Expired
  • 1981-05-08 MX MX819442U patent/MX7094E/es unknown
  • 1981-05-11 ES ES502104A patent/ES8300018A1/es not_active Expired
  • 1981-05-11 ZA ZA00813128A patent/ZA813128B/xx unknown
  • 1981-05-11 BR BR8102900A patent/BR8102900A/pt unknown
  • 1981-05-12 TR TR21341A patent/TR21341A/xx unknown
  • 1981-05-12 JP JP7287381A patent/JPS5715806A/ja active Pending
  • 1981-05-12 AR AR285290A patent/AR223116A1/es active

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