JPS59136400A - Aqueous detergent composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to caustic-based aqueous (solvent-free) cleaning compositions suitable for removing soil from the inside of dirty ovens.

It has been known for many years that caustic-based cleaning compositions are suitable for cleaning dirty ovens.

For example, “0ven CleaningMethod
and Com7yositio7+, U.S. Pat. 7 discloses a thixotropic caustic composition comprising a wetting agent and an organic solvent.

The composition can be used from a pump spray bottle and is designed to solidify upon contact with a solid surface.

U.S. Pat. No. 4,099,985 discloses aqueous solutions of polyoxyethylene polypropylene copolymers with alkali metal hydroxides and surfactants. When applied to a hot surface, this composition undergoes celification 1~, cooling]~
It is designed so that it can return to a liquid state and be easily removed when it is removed.

US Pat. Discloses caustic-containing detergent compositions comprising from about 3 to about 20 weight percent of a solvent containing a mixture of two heteronal phenyl glycol ethers: ethylene glycol, soethylene glycol, or triethylene glycol.

Alkaline 0ven Cleaning Co
US No. 3.7 named “mposition”?
No. 9.933 describes the combination of nitrogen-containing anionic surfactants with polyhydric alcohols to form active concentrates of compositions for cleaning food particles and dirt from preheated surfaces such as cooktops, grills, etc. A solution of hydroxide and water is disclosed.

U.S. Pat. No. 3,715,324 discloses aqueous solutions of sodium 9-methylpolysiloxane hydroxide, tetrasodium pyrophosphate, phosphoric acid- or dihydrogen esters of polyethylene oxide, nonylphenol polyethylene glycol ether, and triethanolamine. or a substantially aqueous mixture thereof. This highly caustic compound is intended for application to hot surfaces, preferably at temperatures of 1-<200 DEG F. or higher.

Crotty et al., in U.S. Pat. No. 3,644,210, describe a tropic detergent containing an alkali hydroxide, a gluconate salt or gluconic acid, a polyethoxylated alkanolamide, a detergent, and an N-aliphatic alkyl B-iminosonorobionate. Discloses agents.

A spray cleaning composition containing a mixture of furfuryl alcohol and tetrahydrofurfuryl alcohol as a caustic agent, a surfactant, and a catalyst is useful for cleaning preheated oven surfaces. It is described in patent no. 3.335.092.

Finally, the technology disclosed in U.S. Pat. include.

All of these compositions require the use of organic solvents and/or open preheating for the cleaning agent to be effective.

Two patents unrelated to open caustic-based detergent compositions but disclosing compositions containing betaine include Le
ver/Gorotlbers Co., U.S. Patent No. 4
．． 373,421% and European e Patent Publication No. 0,068.352 of l1oechst AG.

The present invention provides, on a weight/weight basis of 100% active substance, a) 7 to 10 φ of alkali metal hydroxide, b) 1 to 20% of fatty acid-substituted betaine, amidobetaine, sulfobetaine, amidosulfobetaine or mixtures thereof O , C) 6 to 11 long-chain (one or mixture of chi-olefin sulfonates), and d) the composition and concentration of components (a), (b) and (C)
in combination with a hydrotropic agent to provide a cleaning composition with a viscosity of 200 to 2,000 centivoise at room temperature.

Specification 1. The caustic detergent composition described and claimed in 1 is unique and highly effective and stabilized within the viscosity range of 200 to 2.000 centipoise without conventional thickeners. It is based on the unexpected discovery that it is a highly effective oven cleaner that does not require the use of organic solvents. It adheres very satisfactorily to vertical and top walls when used to clean dirty ovens, increasing intimate contact of cleaning agent and soil on all surfaces. Because it does not contain the usual thickening agents such as starches, rubbers or synthetic polymers, detergents and caustic solutions can easily penetrate into baked-in soils (~, softening them and therefore cleaning quickly). and does not require preheating of the oven.Normal thickeners bind water and thus retard the ability of cleaning agents containing them to penetrate into the hard crumbs of baked-on soil.This retardation requires the use of heat or solvents to promote penetration.In contrast, the compositions of the present invention are highly effective against solvents.
, no need to preheat open.

Suitable alkali metal hydroxides include sodium, potassium and lithium hydroxide, with Sodium Type 13 being preferred. Mixtures of these alkali metal hydroxides can be used if desired.

Betaine substituted with a fatty acid has the structural formula % [wherein, V is 0 or 1, Ori,
R20 is CE2COOO51 is CM, -CHoH-C
H2Soρ, and R3 is −C1120B only when y is 0 and R,,C) is CR2COO○
independently hydrogen or -CB20
B). This R1 chain may be saturated, as in lauryl, or unsaturated, as in oleyl. Examples of betaines substituted with fatty acids suitable for use in the present invention include 14-methyloleylbetaine, where R3 is coconut oil (Ca-"+
s) and R, are dimethyl-cocoylbetaine derived from tallow ("+4~Cl8).At least one R3 group is -t
Hydroxyethyl betaine having the above formula, 'jf 20 jf, has been found to be particularly effective for use in the present invention. Examples of hydroxyethyl betaine are five,
is derived from soybean oil, coconut oil, tallow or hydrogenated tallow. Amidobetaines substituted with suitable fatty acids include dimethylcocoamidebetaine, trimethyloleylamidebetaine, and somethyltalouamidebetaine. Sulfobetaines and amidosulfobetaines substituted with suitable fatty acids are trimethylcocoylsulfobetaine, dimethyl-oleylsulfobetaine, trimethyl-cocoylamidepropylsulfobetaine and dimethyl-oleylamidepropylsulfobetaine.

These compounds or mixtures thereof together with the alpha-olefin sulfonates act as synergists to enhance soil removal performance. Additionally, they serve as a means of stabilizing the viscosity of the resulting composition in the range of 200 to 2000 centivoice at room temperature. They can be used separately or in combination with each other.

Long-chain α-oneine sulfonates are obtained from the sulfonation of n-α-olefins of the structural formula % where RFi is an alkyl chain having 8 to 18 carbon atoms.

Alpha-olefin sulfonates are themselves degreasers and emulsifiers for fats and oils. Its function in the composition is to promote caustic penetration of the soil. Since it is provided in conjunction with betaine, the ability of the composition to stick to the vertical surfaces of the oven is facilitated.

The three components described up to this point, the alkali metal hydroxide, betaine, and alpha-olefin sulfonate, at the recommended concentrations in water, result in a still viscous fluid with the appearance of kelp. A fourth agent (hydrotropic agent) is required to bring the viscosity to a value suitable for application with a sponge, scrubber or pump spray.

The hydrotropic agent, in combination with the three components mentioned above, namely the alkali metal hydroxide, betaine, and alpha-olefin, provides a viscosity in the range of 200 to 2000 centivoise at room temperature and preferably heat (98 It is chosen to stabilize the viscosity in that range even when subjected to stressful environmental conditions such as 'F) and cold (6°F). The cleaning composition of the present invention was released on September 21, 1982.
Disclosed in related U.S. Patent Application No. 420.954, dated 17--particularly suitable for use in oven cleaning equipment.

When used in this device, a preferred viscosity range for the cleaning composition of the present invention is 500 to 800 centivoise. In this range, the composition can be easily applied with the scrubber pad of the device and performs its intended function. Adhesive to the vertical walls of the oven in sufficient quantity to exhibit a viscosity range of 200 to 500 cm71. If the cleaning composition is applied with a sponge or scrubber, an increase in viscosity to 800 centipoise or higher will give a viscous material that will coat just 7'cm of dirt. Large quantities of material (more than actually needed) are required.As the viscosity decreases below 500, the tendency to flow down the vertical walls of the oven becomes significant, resulting in wasted product.However, pump spray When using them, higher viscosities can be tolerated since the amount of feed per press is such that the problems described above are avoided unless the same area is repeatedly covered with liquid12. .

Suitable hydrotropic agents include phosphate ester class 8i hydrotropes such as those known in the art to be useful in madder alkaline virgoux solutions. Suitable phosphoric acid esters have the trade name Trθton1-66,
Triton, // -55 (Roh, rn
& Ba5s Co,) and Ga, j'ac J
IG-510, Gafac RA 600 (G
It is commercially available from AF). Another type of hydrotropic agent that may be used is tridecyloxyquine(ethyleneoxy)ethanol having an ethylene oxide content of 9 to 15 moles per mole of tridecyloxyquine(ethyleneoxy)ethanol. A preferred class of hydrotropic agents are aromatic and polyaromatic sulfonates optionally substituted with one or more alkyl groups. Optional alkyl groups on these sulfonates include methyl, ethyl,
It may be propyl or butyl. Additionally, these sulfonates may be in the sodium or potassium form;
Sodium salts are preferred. Suitable compounds of this type are the sodium or potassium salts of xylene sulfonate, methylnaphthalene sulfonate, cumene sulfonate or mixtures thereof. A preferred type is sodium methylnaphthalene sulfonate. The amount of hydrotropic agent required to provide the composition with the desired viscosity for the intended use depends on the selected hydrotropic agent and the type and concentration of other ingredients in the composition. It will vary depending on the situation. 1. However, the amount required for either composition can be readily determined without undue experimentation by experimental viscosity testing using a standard Brookfield viscosity test.

Optionally, blood phase is added to the composition to provide opacity so that the product is visible during use. Desire 1
．． Any pigment that provides good opacity and that does not react fatally with other ingredients is satisfactory.

Titanium dioxide is preferred. The crystal structure of anaerobite is particularly preferred since it has a greater opacifying power compared to the structure of anatase.

Chelating agents are optionally added to the detergent composition to stabilize the alkaline gold hydroxide and prevent possible agglomeration due to calcium, magnesium and iron present as impurities in the water and various raw materials. . Suitable chelating agents include ethyleneduamide/tetraacetic acid (EI) (TA), di(
・Contains lilotriacetic acid (#T, 4) and alkali metal salts of dalconic acid.

A composition effective for the present detergent composition is shown below.

When the betaine is mono- or d-hydroxyethyl substituted, suitable concentrations are from 1.2 to 18 parts by weight of 100 parts active material.

21 - The preparation of cleaning compositions within the scope of the present invention and their use in cleaning soiled surfaces are illustrated in the following examples.

Example 1 In this example, a 100 kg batch of a cleaning composition was prepared as follows: a) In a small mixing tank, add 1 gallon of water heated to 190°F and add 1 gallon of dimethyl oleyl betaine. A premix was prepared by adding Yu. The water/betaine combination was mixed until the betaine was dissolved and a homogeneous solution was obtained, then 0.3 kg of titanium dioxide was added and further mixed until homogeneous.

b) The next production used a 50 gallon mixing tank with a bottom agitator and constant mixing at a speed sufficient to create minimal swirl. First, add 53 kg (14 gallons) of water and then add α-olefins (CI4-C) to the mixing tank.
+a) 20 klF of sodium sulfonate and 1.0 klF of naphthalene sulfonate were all added. This combination was mixed until clear and the premix prepared as described above was added followed by 50% of a solution of sodium hydroxide at 18%.
．． 4kII was added slowly. Mix the resulting mixture until homogeneous and add 0.2 kg of naphthalene sulfonate.
Add more and mix until homogeneous, product 10
0kl! (235 gallons) was added.

The viscosity of the product was found to be slightly over 1000 centivoise at room temperature as determined using a standard Brookfield viscometer. This viscosity is easily adjusted to any lower viscosity by increasing the methylnaphthalene sulfonate in small increments, typically in an amount of 0.025% w/w of the composition, until the desired viscosity is achieved. be able to.

EXAMPLE ■ Another composition within the scope of the invention was prepared as follows: 950 g of water under 180' and betaine (50% active)
A premix was prepared by combining 50 g in a Waring mixer for approximately 15 minutes 1fJA. For this composition with an opacifying agent, Titanium Dioxide 159 was added and mixing continued until a homogeneous white solution was obtained.

7. In a container of 51, water 2005 F, α-olefin sulfonate (C14 to Ct6. 40 actives)
1000.9 was mixed using a lightweight blender at a moderate speed to avoid foam formation.

Add aromatic sulfonate to this solution as a hydrotropic agent 45! I was added and mixed until the solution was clear. The premix was added to this second solution, the combination was mixed until homogeneous, and 92 (l) of sodium hydroxide (50% active) was slowly added. The mixing speed was adjusted to maintain constant agitation as the viscosity increased. After mixing for at least 15 minutes, 15 g of additional aromatic sulfonate was added and mixing continued for an additional 15 minutes. Resulting composition The material was allowed to cool overnight and the next day the aromatic sulfonate was adjusted by further addition of a hydrotropic agent in small portions to adjust the viscosity (sodium methylnaphthalene sulfonate for runs 1-5 and 8 and modified polyalkyl polynuclear sulfone for runs 6 and 7). acid metals).

In experiment 7, EDTA5Fl was added along with the alpha-olefin sulfonate.

The compositions of these compositions and their viscosity performance under heat stress are shown in Table 1. The percentages in the table are based on weight/weight. C for evaluation of oven cleaners
5MA method (Chemical26-5speciality Manufacturer's
Association LMethod, 1)ev
eloparn, ent Ta5k Force, Pr
Compositions i to 1 were evaluated for stain removal from stained ceramic open tiles by using a method derived from PosedMethod 1981).

The composition exhibited good to excellent cleaning ability. Viscosity data indicates the stability of viscosity when subjected to stressful environmental conditions. The three freeze-thaw cycles were particularly demanding, with the product repeatedly frozen and then thawed at room temperature.

27-1 Sekihara Enki Liquid Sodium Hydroxide 5
0α-olefin (CI4-Cl6) sodium sulfonate
40 Lium dimethyl oleyl betaine 50 Dimethyl oleylamide propyl betaine 30
Dimethyl cocoylamide probyl hydroxys 30
Rufobetaine methylnaphthalene sulfonate sodium 95
Improved metal polyalkyl polynuclear sulfonate 95
Titanium dioxide (optional) 10
0EDTA Sodium Salt (Optional) 37 Water Initial Viscosity, 72"F Viscosity After 3 Freeze-Thaw Cycles, 72°F'986
Viscosity after 1 month in F environment, 72°F*petro
BAF (petrochemical** 36″
Viscosity after one month at F, 720F Table ■ I IIl ■
■ ■ ■ ■18.4 inches 18.7 inches 184 inches 184 inches 18.4 inches 184 inches 184
Chi IR4 Chi 20.0 20.0 26.0 20.0
20.0 22.0 20.0 20.01.0 1
．． 0 1.0 1.0 -- -- -- -- --
−−−− −− −− −−
2.0 1.5 1.0 --
−− −− −− −− −
--1--5,01,41,51,01,31,0--
--1,5------1---1,51,0--0,
30,50,50,50,5--0,5-------,
----------0,1--Enough water to make 100 well 600 650 95G 750 1460
1150 600 700** 600 660 700 800 1160 1
100 400 600 -- 640 --
750 --1050 -- --! Co,
) 28-Example ■ A 100 kg batch of a composition according to the invention using dihydroxyethyl betaine was prepared using the following technique.

In a mixing tank equipped with a bottom stirrer, the following ingredients were added continuously with thorough mixing to create minimal vortex: A) Heat (140-180 below) 9 to 20% water and dihydroxyethyltallow betaine. 4.3 kg were combined with mixing until the betaine was dissolved in the water.

B) Next, add 19.9 kl of 9,α-olefin sulfonate to 34.3 kl of water. and methylnaphthalene sulfone)
2.0kl? was added with mixing until dissolution was achieved.

C) Added 0.3 kg of titanium dioxide and mixed until homogeneous.

D) At this point, 18.3 kg of 50% active sodium hydroxide solution was slowly added with thorough mixing.

E) The amount of methylnaphthalene sulfonate necessary to achieve the desired viscosity was added with thorough stirring.

Adjustment of the viscosity of the batch in step E begins with the substance being processed 1
000. li+ is 15001nI! This was done by weighing the batch into a beaker and cooling it to 72±2'F. At this point (Step 1) the viscosity was checked on a Brookfield viscometer at 72±2. If the viscosity is thicker than 800 cp, add 1.00005 g of methylnaphthalene sulfonate (Step 2) and adjust the viscosity to the desired range (in this case, 500 to 80 at ?2'F).
Steps 1 and 2 were repeated until the temperature reached 0 cpa (Step 3
). Then add the entire amount of methylnaphthalene sulfonate added in steps 2 and 3.
The viscosity was again checked on the 00O11 sample.

The amount of methylnaphthalene sulfonate to be added to the production batch is calculated as follows: Methylnaphthalene sulfonate (pounds) = 1 number of methylnaphthalene sulfonate added to sample 1000.9 to adjust viscosity x from production container The weight of the batch (
Bond) 1000 The following Table 1 gives preferred compositions when using dihydroxyethyl betaine.

-31- The present invention relates to novel liquid oven cleaner compositions stabilized in the viscosity range of 200 to 2000 centipoise at room temperature. This is an effective, fast-acting liquid cleaner with a high caustic content that sticks to open walls without the need for conventional thickeners. In general, it is easily and effectively applied with a sponge, scrubber, or pump spray, avoiding the messiness inherent in brushing on viscous gels. Due to its relatively low viscosity and special surfactant mixture, the material penetrates into dirt more effectively and makes better contact with dirt than gels or foams.

The composition is highly effective and contains only alkali, surfactant, hydrotropic agent (optionally pigment and/or chelating agent) and water. No organic solvents are required and as a result the composition does not generate irritating organic vapors during use.

33- 32- Priority claim August 29, 1983 [phase] United States (US
) ■ 526952 @ Inventor) Mas El Welsh 6051, Illinois, United States of America. 5 Downers Grove Benard Road 3636

Claims (1)

Claims: 1. On a weight/weight basis of 100% active substance: a) 7-10% alkali metal hydroxide. b) Fatty acid substituted betaine, amidobetaine, sulfobetaine, amidosulfobetaine or mixture thereof O1
~2.0%, C) 6-11% of one or a mixture of long-chain α-olefin sulfonates, and d) the chemical structure and concentration of components (α), (b) and (C)
a hydrotropic agent, which in combination with a hydrotropic agent is such as to provide a cleaning composition with a viscosity of 200 to 4000 centipoise at room temperature. 2 Betaine has the formula % formula % [wherein V is 0 or 1, X is an integer of 2 to 4, R is a chain derived from a fatty acid having 8 to 18 carbon atoms,
R2゜ is CH2Coo■ or CH2-CHO, H-CH
, 5O30, and R3 may independently be hydrogen or -C1120H, provided that y is 0 and R20 may be 101120H only when
The composition according to claim 1, characterized in that: 3. The composition of claim 2, wherein the R5 chain is cocoyl, oleyl or taroyl and y is 0. 4 Claim 3 in which R7 is C112COO○
Compositions as described in Section. 5 R7 is cit, -ctt art-cn2s o,
The composition according to claim 3, which is O. 6. The composition according to claim 2, wherein the R chain is cocoyl, the chain is taloyl, y is 1, and X is 3. 7. Claim 6 in which R2 is cn, cooO
Compositions as described in Section. 8 R2 is C1i2-CBO)7-C,R2,50,■
The composition according to claim 6, which is 9, R4 is taloyl, V is 0, and R3 is -C
1120I, and R7 and R2 are C'Jj, CO2
The composition according to claim 2, which is 10. The composition of claim 2, wherein at least one R3 is -CM2O11. 11. The composition of claim 9, wherein R is derived from soybean oil, coconut oil, mellow or hydrogenated mellow. 2. The composition according to claim 9, wherein both R3 residues are -C112011 and the truncated R1 is taloyl. I3 A long-chain α-olefin sulfonate is obtained by sulfonation of an n-α-olefin or a mixture thereof having the structural formula % [wherein R1171 is an alkyl chain having 8 to 18 carbon atoms] d'F The composition according to claim 1. 14 The hydrotropic agent is phosphoric acid ester, tridecyl epoxy (ethylene oxy) containing 9 to 15 moles of ethylene oxide per mole of tridecyl epoxyethanol.
Ethanolne can also contain one alkyl group having 1 to 4 carbon atoms (
, 〈 is an aromatic or polyaromatic sulfonate which may be substituted with more than 1, or a sodium or potassium salt thereof. 15. The composition of claim 14, wherein the hydrotropic agent is sodium xylene sulfonate, sodium methylnaphthalene sulfonate, sodium cumene sulfonate, or a mixture thereof. 16. The composition according to claim 16, in which the opacifying pigment is added in an amount of 1% to 1%. 18. The composition according to claim 1, wherein up to 1% by weight of a chelating agent is added. 19. Weight of active substance ioo%-! ! ' / weight basis, 5- α) Sodium hydroxide 89-951° b) Formula % Formula % [wherein R is an alkyl chain having 8 to 18 carbon atoms] By sulfonation of the n-α-olefin of α obtained
- Mixture of α-olefin sulfonate with olefin sulfonate 141tt'y, 2-88% C) 03-0.8% of dimethyl betaine or 1.2-18% of mono- or dihydroxyethyl substituted betaine , and d) sodium methylnaphthalene sulfonate 1.0-3
．． 1. A caustic-based aqueous detergent composition comprising: 0 exposure. 20 An example of sodium methylnaphthalene sulfonate is
500-80 in combination with sodium hydroxide, α-olefin sulfur 6-hone=1, and betaine.
20. The composition of claim 19 in an amount sufficient to provide a composition having a viscosity of 0 cm. 21. The itome acid product according to claim 19, in which titanium dioxide of gold minestone is added with an opacifying agent in 17 to 30 to 1. 22 Clean sodium ethyl-diaminetetraacetate.
oxidizing agent and 1. Added at 1.0% 1. A composition according to claim 19. 23 %F where betaine is dimethyloleylbetaine
f. The composition according to claim 20. 24. The composition according to claim 20, wherein the betaine is dihydroxyethyltallow betaine.