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
  • C11D1/66—Non-ionic compounds
  • C11D1/83—Mixtures of non-ionic with anionic compounds
  • C11D1/8305—Mixtures of non-ionic with anionic compounds containing a combination of non-ionic compounds differently alcoxylised or with different alkylated chains
• • 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
  • C11D3/08—Silicates
• • 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
  • C11D3/10—Carbonates ; Bicarbonates
• • 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
  • C11D3/12—Water-insoluble compounds
  • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
  • C11D3/1246—Silicates, e.g. diatomaceous earth
  • C11D3/128—Aluminium silicates, e.g. zeolites

Definitions

• the present invention relates to a phosphate-free detergent, which is particularly suitable for washing heavily soiled work clothes, for example contaminated with mineral oil, and does not develop any disruptive amounts of foam when used in automatic washing machines.
• the agent should also under particularly critical conditions, i. H. Even when using softened water, as is usually used in commercial laundries, foam only insignificantly both in the main wash cycle and in the post-rinse phase, so that there are no malfunctions in the automatic washing systems.
• the composition preferably has the following composition: 1 to 1.8% of component A. 12 to 14% of component B. 5 to 7.5% component C 0.2 to 0.8% of component D. 8 to 15% of component E. 45 to 55% component F 3 to 5.5% component G 0.8 to 1.5% component H
• Component (A) consists of an alkylbenzenesulfonate, which preferably has 10 to 13 carbon atoms in the alkyl chain and is usually referred to as dodecylbenzenesulfonate.
• Component (B) has 12 to 15 carbon atoms in the alcohol residue and can be derived from native or synthetic alcohols (oxo alcohols).
• the latter usually consist of a mixture of linear and methyl-branched alcohols in the 2-position, the proportion of linear alcohols being said to predominate.
• Preferred are those which have an average of 2.5 to 3.5 ethylene glycol ether groups.
• Component (C) is derived from the same alcohols or alcohol mixtures as component (B).
• the average content of glycol ether groups is preferably 6.5 to 7.5.
• Essential for the desired low foam formation is the observation that the proportion of C12 alcohol, based on the alcohol residues, in components (B) and (C) is not more than 50 wt .-% and that the agent as a whole is no longer contains as 2 wt .-%, preferably not more than 1 wt .-% and in particular 0.2 to 0.8 wt .-% of ethoxylated C16-C18 alcohols.
• Component (D) can be derived from natural and / or synthetic alcohols.
• Ethoxylated tallow fatty alcohols which essentially consist of a mixture of cetyl alcohol, stearyl alcohol and oleyl alcohol and have 3 to 7, preferably 4 to 6, ethylene glycol ether groups, have proven to be very useful.
• Component (E) consists of a synthetic, water-containing zeolite NaA, which consists of at least 80% by weight, preferably more than 90% of crystalline particles with a particle size below 10 ⁇ m and contains no particles with a particle size above 30 ⁇ m.
• the zeolite has a calcium binding capacity of 100 to 200 mg CaO / g, which is determined according to the information in DE 24 12 837.
• Component (F) consists of anhydrous soda.
• Component (G) consists of sodium silicate, which has a Na2O: SiO2 ratio of 1: 2 to 1: 3.4.
• Sodium silicates with a high SiO2 content ie those with a ratio of 1: 3 to 1: 3.4, are preferably used in proportions of at most 3 to 5% by weight, for those with a ratio of 1: 2 to 1: 2.5, the addition can be a maximum of 5 to 7% by weight.
• the zeolite (component E) and the sodium silicate can interact in highly concentrated aqueous mixtures (slurries) to form coarser zeolite agglomerates
• the components (E) and (G) are expediently processed separately in the preparation of the compositions or the alkali silicate already dry, zeolite-containing mixture mixed in dry form or mixed as an aqueous solution under agglomerating conditions.
• Nonionic or anionic polymers with a graying-inhibiting effect serve as constituent (H).
• Cellulose ethers such as sodium carboxymethyl cellulose and mixtures thereof with other cellulose ethers such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose or mixed ethers such as methyl hydroxyethyl cellulose, methyl carboxymethyl cellulose or ethyl hydroxyethyl cellulose are particularly suitable.
• Suitable polymers are polyacrylic acid, copolymers of acrylic acid and vinyl ethers, copolymers of acrylic acid and maleic acid (Sokalan R ) in the form of the sodium salts and other known copolymers of acrylic acid with copolymerizable olefinic compounds.
• Cellulose ethers and synthetic polymers can also be used together. Mixtures of carboxymethyl cellulose with methyl cellulose or methyl hydroxyethyl cellulose have proven to be particularly useful.
• non-surfactant or component (I) which does not act as a builder
• water which is bound physically or as a hydrate and neutral salts, in particular sodium sulfate, are suitable.
• This group also includes enzymes, fragrances and powder improvers.
• the mixtures can be prepared by spray drying from aqueous batches by granulation or else by mixing together the granular to powdery individual constituents and adding the liquid nonionic surfactants or the component (A) dissolved in water. Separate processing of the zeolite and the sodium silicate is advantageous, as already stated above.
• the component (E) can also be used as a water-containing filter cake, such as is obtained in the synthesis of the zeolite, according to the teaching of DE 25 27 388 is stabilized with suitable dispersing agents.
• a suitable stabilizing agent is a nonionic surfactant, in particular a compound according to component (D), which is preferably introduced into the mixture in this form. After drying, the water content of the composition, including the water of hydration contained in component (E), is generally 6 to 10% by weight.
• the agents are generally used in a concentration of 5 to 12 g / l, preferably 8 to 10 g / l, with softened water, ie softened to a degree of hardness of less than 2 ° dH, in particular less than 1 ° dH, for Preparation of the wash liquor is used.
• a detergent of the following composition was tested.
• the nonionic surfactants B and C are derived from oxo alcohols of chain length C12-C15.
• EO means attached ethylene oxide.
• Component (E) was used as an aqueous dispersion (solids content 50% by weight) and contained component (D) as a dispersion stabilizer.
• Component (H) consisted of a 2: 1 mixture of Na-carboxymethyl cellulose and methyl hydroxyethyl cellulose (hydroxyethyl content 0.8% by weight). The conversion into a granular powder was carried out by spray drying components (A) to (F) and (H) together and subsequently spraying on an aqueous solution of component (G).
• the percentages given relate to% by weight of anhydrous substance.
• Front loading washing machine (FRISTA R model); Detergent concentration 10 g / l; Loading ratio 1: 14.5; Ratio of kg textile goods to liters of wash liquor 1: 5; Water hardness 0 ° dH; Prewash for 20 minutes at 70 ° C; Wash for 10 minutes at 50 to 60 ° C; 3 rinsing; 2 times with softened water, finally with tap water.
• Bv Refined cotton
• used motor oil mineral oil
• the comparative products V1 and V4 showed a favorable foaming behavior, but are unsatisfactory in terms of their washing performance.
• the comparative product V2 foams strongly in the wash cycle and low in the rinse cycle, but does not match the product according to the invention in terms of washing performance compared to mineral oil.
• V3 only has a favorable washing effect compared to mineral oil soiling; however, it disrupts the intensive re-foaming during the rinsing of the laundry.

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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)
• Inorganic Chemistry (AREA)
• Detergent Compositions (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=6317433

Family Applications (1)

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Cited By (4)

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Citations (4)

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• 1986
  • 1986-12-31 DE DE19863644808 patent/DE3644808A1/de not_active Withdrawn
• 1987
  • 1987-12-22 US US07/137,202 patent/US4832863A/en not_active Expired - Fee Related
  • 1987-12-23 EP EP19870119089 patent/EP0273377A3/fr not_active Withdrawn
  • 1987-12-28 JP JP62336832A patent/JPH01174599A/ja active Pending
  • 1987-12-30 DK DK694587A patent/DK694587A/da not_active Application Discontinuation

Patent Citations (4)

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