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
  • C11D1/94—Mixtures with anionic, cationic or non-ionic compounds
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L15/00—Washing or rinsing machines for crockery or tableware
  • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
  • A47L15/0055—Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L15/00—Washing or rinsing machines for crockery or tableware
  • A47L15/42—Details
  • A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
  • A47L15/4418—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants in the form of liquids
• • 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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/02—Anionic compounds
  • C11D1/04—Carboxylic acids or salts thereof
  • C11D1/10—Amino carboxylic acids; Imino carboxylic acids; Fatty acid condensates 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
  • 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

Definitions

• rinses with other purposes exist, for instance, disinfection with chlorine containing solutions such as sodium hypochlorite solutions. Such types of rinses are beyond the scoop of this application.
• Hot water which is used in dish washing machines and in many automobile washing facilities, gives faster evaporation and shorter drying time.
• the rinse aid should give fast and even sheeting action.
• liquid rinse aids are delivered as a concentrate with 20 to 30% active material and 70 to 80% water.
• rinse aids are delivered as cast cakes, which are gradually dissolved by a water jet directed against the cake.
• the components of the rinse aid must be adjusted to the method of manufacturing. Restrictions with regard to suitability for casting and slow, gradual and uniform leaching of the cake may cause that rinse aid effects, with regards to good sheeting action, must come in second place.
• liquid rinse aids are preferred. Often spotting of the rinsed surfaces occurs after drying despite addition of rinse aid. Then the drying effect is often judged as bad.
• rinse aid is added as early as possible, as one believes that a long mixing time is an advantage towards getting an even distribution in the rinsing water.
• liquid rinse aid is added by using diaphragm pumps giving intermittent dosing.
• the purpose of this invention is to reduce deterioration of the rinse aid caused by prolonged storage in diluted state and at high temperature.
• a combination of alkylene oxide modified sorbitol fatty acid ester and a defoaming agent is a combination of alkylene oxide modified sorbitol fatty acid ester and a defoaming agent.
• the alkylene oxide modified sorbitol fatty acid ester is a nonionic surface active agent.
• defoaming agents including fatty acids, fatty acid esters, phosphoric acid esters, sulfonated compounds and alkyl sulfates are, mentioned. Many of these compounds have anionic type of surface activity.
• US patent No. 5,273,677 refers to a rinse aid compounded of a low foaming surface active agent, a solubility improving system for the low foaming surface active agent and an anionic dispersion agent.
• phosphate esters, sulphosuccinates, sodium naphtalene, alkyldiphenyloxide sulfonic acid and their salts are cited.
• No use examples for other anionic surface active agent than the sodium salts of alkyldifenyloxide sulfonic acid are presented.
• the aid may be composed as a liquid mixture containing 15 to 50% water. No nitrogen containing anionic surface active agents are mentioned. No recommendations for diluting to use solution are given.
• a liquid rinse aid which is water-free or contains just small amount of water (0 to 30% by weight water, preferably less, for instance 0 to 20% by weight, 0 to 10% by weight or most preferred 0 to 5% by weight), is mixed with the rinse water just before use.
• the very concentrated rinse aid may be diluted either via an intermediate dilution to a 2 to 50% mixture or directly to a use solution containing 0.0005 to 0.5% by weight active material.
• use solution it is meant the finally diluted solution used for the rinse.
• the storage time after dilution should be limited so that prediluted solution does not need to be stored more than 24 hours, preferably not more than 8 hours, and especially preferred 1 to 4 hours. This refers to storing at ambient temperature or less. If the storing temperature is higher, the storage should be limited to one hour at most, preferably to 10 to 30 minutes.
• a rinse aid according to example 2 which has been diluted by mixing 5 liters of the aid to 25 liters premix and then stored at ambient temperature initially has very high efficiency. Already after 24 hours the aid has lost enough efficiency to make the difference obvious even without possibilities of direct comparison. After 48 hours the efficiency becomes so low that complaints are more frequent than acceptances.
• the rinse aid should be added to the rinse water so that a fairly constant concentration during the entire rinsing time is maintained. This can be done by using a pump giving constant flow, for instance a hose pump. The rate of addition is adjusted so that an in time evenly distributed flow is obtained during the entire time of rinse water delivery. Further improvements may be obtained if the rinsing is done with softened water. Still better results may be obtained if rinsing is done with de-ionized water, for instance water treated by reverse osmosis (RO.).
• RO. reverse osmosis
• the micro- emulsion will be broken at the surface proper.
• the fine distribution in the micro- emulsion gives a continuous layer of rinse aid on the surface.
• the ideal is said to be a mono-molecular layer. The new method approaches this ideal.
• the water content in the concentrate should be kept very low. Tests show that no grave influence can be observed at comparatively short storing (some months) and moderate storage temperatures if the water content is below 30% by weight. For reasons of safety, lower contents are preferred, for instance 20, 10 or even better 5% by weight. Alcohol does not cause the same negative effect and may with advantage be used as viscosity adjusting additive if required. Small amounts of water improve the dissolution rate. Thus completely water free products are less preferred if no special regard can be taken to dissolving at compounding and addition.
• a device for use at predilution of a rinse aid according to the invention, may comprise an ejector pump, which aspires and mixes a super-concentrate, containing less than 30% by weight water and more than 40% by weight active material, with water to a 2 to 10% solution, in a small container of some liters serving as pump sump for the diluted rinse aid solution and devices for adding the rinse aid solution to the hot water after the super-heater and just before the rinse nozzles.
• the container should be as small as possible, so as not to be inconvenient and so that long storage periods are avoided.
• This device is suitable for dish washing machines. Dosing may be done via a dosing pump, which, in its simplest form, may with advantage be a hose pump with adjustable rotation rates.
• a suitable arrangement consists of a small container holding the quantity of rinse water needed for one automobile.
• the preparation of use solution for the rinsing starts automatically at a suitable signal from the wash process. Such a signal can be taken from opening the front door, prepayment to start the wash machine, when the wash machine starts moving or from another suitable moment of the wash process. Between washes the preparation container is left empty. The preparation can be done as described above for dilution.
• compositions differing from conventional rinse aids with respect to reduced water content only often form gelatinous lumps at dilution. Such lumps are difficult to disperse.
• common for the new compositions is that no conventional hydrotropic substances, such as toluene, xylene or cumene sulfonates, with high water solubility are used. Instead hydrophobic, low foaming nonionic surface active agents of modern types with good qualities regarding biological degradation are combined with fatty acid esters and/or solvents and an ionic surface active agent with good qualities as emulsifiers.
• the ionic surface active agent should contain nitrogen atoms and may be cationic, which is preferred concerning automobile wash plants, or anionic, which may be suitable at use in dish washing machines.
• Ampholyte and/or zwitterionic surface active agents may be used but are more expensive.
• An especially suitable group is anionic surface active agents that contain nitrogen atoms. En typical representative for this group is sodium lauryl sarcosinate. The basic qualities of these surface active agents are not sufficiently strong to make them ampholytic or zwitterionic surface active agents.
• the nitrogen group is carrying a partial cationic charge, which allows the surface active agents to stick to surfaces much better than, for instance the anionic surface active agents used according to US 5,273,677. Therefore they contribute in a positive way to the sheeting action, in contrast to the mentioned other anionic surface agents, which have a mainly negative effect with respect to good sheeting action.
• nonionic surface active agents for combining with anionic surface active agents are fatty alcohols, which have been ethoxylated and propoxylated.
• compositions with cationic surface active agents short chain ethoxylated fatty alcohols may be suitable.
• nonionic surface active agent The proportion between the content of nonionic surface active agent and ionic surface active agent changes dependent on the use and if the ionic surface active agent is anionic or cationic.
• anionic surface active agent intended for rinsing after machine dish washing the nonionic part is predominant and may be more than 95% by weight of the surface active agent combination.
• a suitable proportion of nonionic surface active agent to anionic surface active agent may be from 4:1 to 40:1.
• agents with cationic surface active agent intended for rinsing after an automatic car wash the cationic part is predominant.
• a suitable proportion cationic surface active agent to nonionic surface active agent may be from 3:1 to 40:1.
• a suitable composition for use after machine dish washing contains 60 to 95% by weight of low foaming nonionic surface active agent of the type fatty alcohol ethoxy/propoxylate and 1 to 10% by weight of anionic surface active agent of the sarcosinate type and 0 to 30% by weight water.
• cationic products for automobile washing solvents of the white spirit and non- aromatic white spirit may be present. If this type of product is used for machine dish washing the mentioned solvents should be replaced wholly or partly by fatty acid esters. Such compositions may be used for automobile washing, too, but are more expensive than solvent containing products. Composition containing cationic surface active agents should be made weakly acid to reinforce their cationic character.
• Example 1 A restaurant dish washing machine consumed 10 to 12 liters per week of a rinse aid containing 25% active material. This corresponds to 2.5 to 3 kilos 100% rinse aid. 0.5 ml rinse aid per liter rinse water was used. Thus, the content of water free rinse aid became 0.0125% by weight.
• the rinse aid was dosed by a diaphragm pump. The addition took place before the super-heater.
• the equipment was completed with a 2 liters container and a hose pump.
• the container was filled with diluted rinse aid by an ejector pump, connected to a water pipe.
• the pump aspired rinse aid from a can containing a rinse aid solution with 96% by weight water free material.
• a hose pump was connected to the container to feed rinse aid to the supply pipe for hot rinse water from the super-heater to the rinse nozzles in a continuous flow during the entire rinsing time (about 20 sec).
• This aid contains: Water 4.5 % by weight
• MIRAVONTM and ORAMIXTM are registered trade marks.
• MIRAVON B 79 R and MIRAVON B 12 DF are two different varieties of biologically easily degradable, low foaming, nonionic surface active agents and consist of short chained fatty alcohols, which have been ethoxylated and propoxylated.
• ORAMIX L30 stands for sodium lauryl sarcosinate.
• rinse aid could be cut down to about 1 liter 96% agent per week, i.e. to about 0.96 kilos, which corresponds to one third of earlier consumption. Simultaneously the rinse result became much better. No tendencies to streaking could be seen.
• An automatic automobile wash plant used, for each wash, about 10 liters rinse water containing 0.3% sheeting action aid, the active components of which comprised nonpolar solvents and surface active agents.
• the content of active material in the concentrate was about 30 % by weight.
• the consumption for each washed automobile was 36 g concentrate corresponding to 10.8 g active material.
• the rinse aid was added before the percolator and heated with the rinse water. The result of the rinsing was judged as less satisfactory as the sheeting action was bad with spotting, streaking and filming as consequences.
• the sheeting action aid was exchanged against some different newly developed compositions containing 15 to 35% cationic surface active agent of the type quaternary soya/cocosamidoamine, 1 to 5 % hydrophobic nonionic surface active agent(C11 , 3EO) and 30 to 75% nonpolar solvent consisting of nonaromatic white spirit and fatty acid esters.

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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)

Priority Applications (3)

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Publications (1)

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Family Applications (1)

Country Status (5)

Citations (9)

• 1997
  • 1997-12-02 SE SE9704503A patent/SE513638C2/sv unknown
• 1998
  • 1998-12-02 EP EP98960142A patent/EP1051101B1/en not_active Expired - Lifetime
  • 1998-12-02 WO PCT/SE1998/002209 patent/WO1999030606A1/en active Application Filing
  • 1998-12-02 DK DK98960142T patent/DK1051101T3/da active
  • 1998-12-02 DE DE69840687T patent/DE69840687D1/de not_active Expired - Fee Related

Patent Citations (9)

Non-Patent Citations (1)

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