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
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0043—For use with aerosol devices
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
  • C08L83/04—Polysiloxanes
• • 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
  • C11D3/0057—Oven-cleaning 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
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/37—Polymers
  • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/373—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicones
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
  • C08G77/04—Polysiloxanes
  • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
  • C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxy groups

Definitions

• Moermond ABSTRACT A process for cleaning food spills from ovens and the like devices which comprises the steps of applying a composition which consists essentially of from 1 to 35 percent by weight of a polydimethylsiloxane having a viscosity of at least 3000 cs. at 25C., from 0.5 to 5.5 percent by weight ofa siloxane resin composed of S10 units and (CH ),,SiO,, units in the ratio of 1:0.6-1 .2, from 0.1 to 9 percent by weight of a metal oxide, and the balance solvent, to the clean and essentially dry surfaces of the oven or like device, and then, after the oven or device has been employed one or more times for heating food, cleaning the food spills therefrom, said cleaning being facilitated by said composition.
• a composition which consists essentially of from 1 to 35 percent by weight of a polydimethylsiloxane having a viscosity of at least 3000 cs. at 25C., from 0.5 to 5.5 percent by weight ofa siloxan
• Catalytic ovens are much the same as pyrolytic ovens, and perhaps should be categorized with them, but by one means or another they provide for the presence of a catalyst on the interior surfaces whereby the pyrolytic oxidation and/or burning away of food spills is supposedly achieved at lower temperatures.
• these catalytic ovens do not entirely overcome the above problems of the pyrolytic ovens and are less than thorough in cleaning away food spills.
• compositions which when applied to the soiled oven surfaces are supposed to remove the food spills.
• these compositions usually contain strong or harsh alkaline detergents and/or solvents.
• the problem with this approach has been that thecompositions will remove some types of food spills but not the full range of food spills encountered by theaverage housewife.
• the compositions are too dangerous for safe use in the home.
• Another object of this invention is to provide a process for cleaning industrial ovens and similar devices which are employed for baking, cooking and heating foods and from which food spills must be periodically removed whereby the cleaning of the food spills therefrom is facilitated.
• Still another object of this invention is to provide a composition for use in the above process which aids in the cleaning process.
• This invention relates to a process for cleaning food spills from ovens and the like devices which comprises the steps of applying a composition which consists essentially of from I to 35 percent by weight of a polydimethylsiloxane having a viscosity of at least 3000 cs.
• the composition can be applied to the desired surfaces, for example those of an oven, by any of the conventional means for applying materials.
• the composition can be brushed, dabbed, wiped or sprayed onto the surface. Probably the most convenient means of applying the composition and obtaining a relatively uniform application is via an aerosol.
• any of the well-known propellants used in aerosols such as isobutane, nitrogen, nitrous oxide and the halocarbons, can be employed.
• the halocarbon propellants are preferred.
• the surface should be both clean and essentially dry.
• the exact amount of the composition applied to the surface to be treated is not critical but should be enough to form a substantially complete coating on the surface. MOre than this can be applied but is not known to provide any additional benefit. After application it is best to allow a waiting period of 20 to 30 minutes before useoftheoven.
• the composition employed in the'process does not cure but as a general rule forms a tacky or wet coating thereon.
• the spills are removed. Cleaning or spill removal can-be by any of the usual means employing a mild detergent and in most instances using only warm soapy water and a dish cloth, paper towel or sponge. Tlnthe event of a stubborn spill, this can be removed with a plastic scrubber and minimal effort.
• One of the advantages of the process of this invention is that it is not necessary to clean the oven after each use or spill but it can be cleaned weekly, monthly or even less often (depending on usage) without worrying about the food spills baking onto the surface.
• composition employed in the process of this invention for facilitating the cleaning of ovens and the like devices consists essentially of from I to 35 percent by weight of a polydimethylsiloxane having a viscosity of at least 3,000 cs. at 25 C., from 0.5 to 5.5 percent by weight of a siloxane resin composed of SiO.,, units and (CH,),SiO,,, units in the ratio of l:0.6-1.2, from 0.] to 9 percent by weight of a metal oxide, and the balance solvent.
• the first essential component is a polydimethylsiloxane having a viscosity of at least 3,000 cs. at 25 C. So far as is known at this time there is no critical upper limit as to the viscosity of this siloxane and even polydimethylsiloxane gums (a gum being a material having a viscosity greater than 1,000,000 cs. at 25 C.) can be employed. For best results, however, it is preferred that the polydimethylsiloxane be a fluid having a viscosity in the range of about 12,500 to 40,000 cs. at 25 C.
• viscosity can refer to the property of a fluid composed of a single siloxane or of a fluid composed of two or more siloxanes which have been blended together to obtain the desired viscosity. It is not necessary that all of the siloxanes in a blend have a viscosity of at least 3000 cs., i.e. some siloxanes can have viscosities of less than 3000 cs., so long as the ultimate viscosity of the fluid used is at least 3000 cs. So far as is known at this time any polydimethylsiloxane can be employed in the composition of this invention regardless of the method by which it is prepared. Many such siloxanes are commercially available and thus would be the siloxanes normally used. While the polydimethylsiloxane can constitute from 1 to 35 percent by weight of the composition, for best results the amount employed should be within the range of 10 to 15 percent.
• the second essential component in the composition is a siloxane resin composed of SiO.,-, units and (CH,),SiO,, units.
• the ratio of SiO.,, units to (CH,) ,SiOl/Z units in this resin must be within the range of l:0.6-l.2.
• This resin is commercially available and can be prepared by various processes therefrom-said cleaning being facilitated by said composition. 5 known to those skilled in the art. One such process is described in U.S. Pat. No. 2,676,182 the disclosure of which is incorporated herein by reference.
• this resin normally contains about 2 to 3 percent by weight of siliconbonded hydroxyl groups, i.e.z aSil-l groups.
• the content of the silicon-bonded hydroxyl groups in the resin can be reduced in several ways. The simplest way to accomplish this result is to mix a trimganosilylamine or bis(triorganosilyl)amine with the resin as prepared. This results in the replacement of the hydroxyl groups with triorganosilyl groups. This reaction is illustrated by the equations below wherein R represents any hydrocarbon radical. Specific examples of suitable amines are dimethyl vinylsilylamine and bis(trimethylsilyl)amine. v (l R,siNH, +HOSi R,SiOSij+NH,
• the amount of siloxane resin in the composition must be within the range of 0.5 to 5.5 percent by weight and is preferably within the range of 0.75 to 2.5 percent by weight. It should be noted that this resin will usually be incorporated in the composition of this invention in the form of a solvent (for example xylene) solution for ease of handling but that the ranges of resin specified above and elsewhere refers to the resin solids and not the amount of the solution added.
• a solvent for example xylene
• the third essential component in the basic composition described above is from 0.1 to 9 percent by weight of a metal oxide. It is not completely understood how the metal oxide functions in the composition but it is known that its presence, in the above stated quantity, extends the time during which the composition facilitates the cleaning of ovens and the like devices. This component also accelerates the process whereby fat and grease spills tend to shrink in size, crack and peel from the surface when the composition is used.
• the oxides of vanadium, chromium, molybdenum, manganese, iron cobalt, nickel, copper, aluminum, tin, titanium, silicon, bismuth and cerium can be employed herein.
• the fourth essential component which makes up the balance of the composition, is the solvent.
• Any solvent can be employed since the function of this component is merely that of a vehicle or means for applying the other components to the desired surface.
• the solvent be one which has a high flash point or which is nonfiammable, and presents little hazard to physical health.
• organic solvents such as toluene, xylene, petroleum naphtha, acetone, VM & P naphtha, stoddard solvent, mineral spirits, benzene methylisobutyl ketone, butyl alcohol, tetrachloroethane, monochlorobenzene, ethyl acetate, 1, l, l -trichloroethane and hexane.
• the solvent be a hydrocarbon or a halogenated hydrocarbon solvent.
• solvent as used herein is intended to include mixtures of solvents as well as a single solvent. As stated above, the solvent makes up the balance of the composition which is from 50.5 to 98.4 percent by weight of the composition.
• compositions employed in the instant process are prepared by simply mixing the ingredients together in the appropriate proportions. So far as is known at this time. there is no critical order in which the ingredients are mixed. With respect to the metal oxide, it has been found that this can best be added by mixing it with the polydimethylsiloxane prior to mixing with the other ingredients. After the composition has been prepared, if it has been standing for some time, it should be shaken well to make sure that the metal oxide is thoroughly dispersed throughout the composition prior to the application of the composition in accordance with the process.
• a clean, dry, gray, 4 inch X 6 inch porcelain panel was placed vertically in an exhaust hood.
• the composition to be tested was shaken vigorously and poured into a .let-Pak Spray Unit.
• the spray unit was shaken and then the composition sprayed onto the panel.
• the spray operation consisted of slow, sweeping, horizontal motions and moving from top to bottom of the panel. A substantially complete coating of the composition was applied to the panel by this technique.
• the panels were placed in an electric oven and heated for about 1/2 hour at 350 F.
• a glob of a commercial cherry pie filling and a glob of a commercial cheese paste.
• a warm mixture of hamburger grease and chicken grease was splattered onto the panels using a spatula.
• Both shelves of the oven were used to hold the panels, with the shelves being set at the lowest levels. No more than ten panels were placed on a shelf at one time.
• Tl-le panels containing the food spills were subjected to a 20 hour variable temperature heating cycle which involved heating for two hours at each of the following temperatures in the order indicated: 300 F., 375 F., 325 F., 400 F., 350 F., 300 F., 375 F., 325' F., 400 F., and 350 F., After the first 10 hours of heating, the shelves were rotated so as to allow equal exposure to the lower heating coil. Twenty hours of heating in this cycle represents approximately 25:5 calendar days of normal oven usage.
• the panels Upon completion of .the heating cycle the panels are removed from the oven, allowed tocool to room temperature and then subjectively evaluated for ease of cleaning according to the following rating systems.
• V Very Good
• Grease spills means the use of a moist, soapy, paper towel, cloth, sponge or plastic scrubber to affect a cleaning.
• V-splatters break easily and slide from the surface after somewhat more wiping action than an excellent rating.
• G about one-half of the splatters break from the surface after about the same wiping action required for a very good rating.
• compositions were prepared which consisted essentially of about 4 percent of various polydimeth wit m units in the ratio of PPEEEEGPPPPP G GG EEEEEEVGVVEE 2 dd 6 en 8 m m. u ow .0 r o n m 8 m .m .m .m
• the siloxane resin was added as a 6 8 percent solids solution: in xylene.
• the compositions were prepared b together.
• compositions were evaluated according to the'procedure described above and the results a pecific nature of' the 0 stiq thjyhstelfls' Ease of spill removal Cherry Viscosity e Polydlmethylslloxane (cs) filling Cheese forth in the table below.
• compositions were prepared as in example 3 except that the amount of siloxane resin employed was about I Composltlon feel purposes of comparison. 0% so utlon in 1,1,1-trlchloroethane.
• EXAMPLE 2 positions were evaluated as in example i and the test results I l are set forth in the table below as well as the amount of resin in p 6 the composition.
• t 2.4 peri positions t forth in Ease of spill removal Cherry Grease Viscosity pie shrink- Polydlmethylsiloxane (cs.) filling Cheese Grease age I Included for 1 Added as 1 9 91..
• compositions were prepared as in exam cept that the siloxane resin employed contained abou cent of silicon-bonded hydroxyl groups. These com were evaluated as in example i and the results are se the table below.
• EXAMPLE 7 A composition was prepared which consisted essentially of about 4 percent of a polydimethylsiloxane having a viscosity of about 30,000 cs. (prepared by blending 3.33 percent of a 60,000 cs. polydimethylsiloxane and 0.67 percent of a i000 cs.
• polydimethylsiloxane about I percent of a siloxane resin composed of SiO,,, units and (CH,),SiO,,, units in the ratio of l:0.6l .2 and containing about 0.66 percent of silicon-bonded hydroxyl groups, about 0.5 percent of manganese dioxide, about 0.5 percent xylene (solvent in which the siloxane resin was added), about 29 percent 1,] ,l-trichloroethane, about 40 percent of trichloromonofluoromethane and about 25 percent of dichlorodifiuoromethane, the latter two ingredients functioning as solvents as well as propellants.
• This composition was placed in an aerosol container. When this composition was applied to the walls of a clean, dry oven, and then the oven used for heating foods, the food spills could be easily removed by cleaning the oven with warm soapy water and paper towels.
• T txth hissl ims is l.
• a process for cleaning food spills from ovens and the like devices which comprises the steps of applying a coating composition which consists essentially of from I to 35 percent by weight of a polydimethylsiloxane having a viscosity of at least- 3000 cs.
• a siloxane resin composed of SiO,,, units and (CHQ SiO units in the ratio of l:0.6-L2 from 0.1 to 9 percent by weight of a metal oxide, and the balance solvent, to the clean and essentially dry surfaces of the oven or like device, and then, after the oven or device has been employed one or more times for heating food, cleaning the food spills therefrom, said cleaning beingfacilitated bysaid composition.
• the metal oxide is selected from the group consisting of the oxides of vanadium, chromium, molybdenum, manganese, iron, cobalt, nickel, copper, aluminum, tin, titanium, silicon, bismuth, and cerium.
• composition is applied via an aerosol and the cleaning step is performed by contacting the soiled coating with warm soapy water.
• metal oxide is selected from the group consisting of the oxides of vanadium, chromium, molybdenum, manganese, iron, cobalt, nickel, copper, aluminum, tin, titanium, silicon, bismuth and cerium.
• metal oxide is selected from the group consisting of the oxides of vanadium, chromium, molybdenum, manganese, iron, cobalt, nickel, copper, aluminum, tin, titanium, silicon, bismuth and cerium.
• a process as defined in claim 10 wherein the metal oxide is aluminum oxide.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Detergent Compositions (AREA)
• Cleaning By Liquid Or Steam (AREA)
• Compositions Of Macromolecular Compounds (AREA)

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Family Applications (1)

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Cited By (7)

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• 0
  • BE BE759281D patent/BE759281A/fr not_active IP Right Cessation
• 1969
  • 1969-11-24 US US879530A patent/US3615826A/en not_active Expired - Lifetime
• 1970
  • 1970-09-08 CA CA092,521A patent/CA946360A/en not_active Expired
  • 1970-10-27 GB GB50896/70A patent/GB1292896A/en not_active Expired
  • 1970-10-30 JP JP45095820A patent/JPS4828763B1/ja active Pending
  • 1970-11-20 FR FR7041769A patent/FR2069771A5/fr not_active Expired

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