CN111394200B - Liquid tableware detergent composition without dioxane and preparation method thereof - Google Patents
Liquid tableware detergent composition without dioxane and preparation method thereof Download PDFInfo
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- CN111394200B CN111394200B CN201911425916.0A CN201911425916A CN111394200B CN 111394200 B CN111394200 B CN 111394200B CN 201911425916 A CN201911425916 A CN 201911425916A CN 111394200 B CN111394200 B CN 111394200B
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- 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
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- 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
- C11D3/046—Salts
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- 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
- C11D3/20—Organic compounds containing oxygen
- C11D3/2068—Ethers
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- 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
- C11D3/20—Organic compounds containing oxygen
- C11D3/2075—Carboxylic acids-salts thereof
- C11D3/2086—Hydroxy carboxylic acids-salts thereof
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- 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
- C11D3/20—Organic compounds containing oxygen
- C11D3/2093—Esters; Carbonates
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- 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
- C11D3/26—Organic compounds containing nitrogen
- C11D3/33—Amino carboxylic acids
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- 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
- C11D3/34—Organic compounds containing sulfur
- C11D3/349—Organic compounds containing sulfur additionally containing nitrogen atoms, e.g. nitro, nitroso, amino, imino, nitrilo, nitrile groups containing compounds or their derivatives or thio urea
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- 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
- C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
- C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
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- 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
- C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
- C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
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- 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
- C11D1/662—Carbohydrates or derivatives
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- 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
-
- 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
- C11D1/90—Betaines
Abstract
The invention relates to the field of daily chemicals, and discloses a dioxane-free liquid tableware detergent composition and a preparation method thereof, wherein the liquid tableware detergent composition comprises the following components in parts by weight: 19-25% of anionic surfactant, 4-6% of amphoteric surfactant, 1-3% of nonionic surfactant, 0-0.5% of chelating agent, 0-0.2% of pH regulator, 0-2% of inorganic salt, 0-0.2% of preservative, 0-0.2% of essence and the balance of water; the anionic surfactant comprises at least linear alkylbenzene sulfonate and alpha-olefin sulfonate. According to the invention, by strictly controlling the compounding ratio of LAS, AOS, APG and CAO, the obtained detergent composition does not contain dioxane, is safe and harmless, can be kept uniform and transparent at low temperature, is low in manufacturing cost, has higher decontamination performance than national standard dish washing detergent, and is not inferior to the traditional dish washing detergent containing AES surfactant.
Description
Technical Field
The invention relates to the field of daily chemicals, in particular to a liquid tableware detergent composition without dioxane and a preparation method thereof.
Background
In recent years, with the improvement of living standard of people and the development of surfactant industry, environmental awareness has been gradually getting into the heart, people have higher and higher requirements and expectations for detergent products, and the attention of people on dish washing detergents is not only about the superiority and inferiority of the washing effect, but also about whether the dish washing detergents affect human health, are easy to biodegrade, are harmless to the environment and the like. The fatty alcohol polyoxyethylene ether sulfate salt surfactant used in common dish washing detergents can not avoid bringing by-product dioxane in the production process, and has irritation to human skin and respiratory systems, and future development of dish washing detergents takes green environmental protection as a mainstream direction, so that the development of a dish washing detergent which has good decontamination performance, good stability, no dioxane by-product and feasibility of large-scale production has certain significance.
The common detergent usually takes Linear Alkylbenzene Sulfonate (LAS), fatty alcohol polyoxyethylene ether sulfate (AES), sodium dodecyl sulfate (K12), alpha-olefin sulfonate (AOS), fatty acid Methyl Ester Sulfonate (MES) and the like as main raw materials, and is compounded with a certain amount of amphoteric surfactant or nonionic surfactant. Among them, AES is an anionic active agent with excellent performance, has good detergency and emulsifying power, but because the AES raw material inevitably carries a by-product dioxane in the production process, it belongs to a banned material in cosmetics, and has strict control standards in daily consumer goods. The dioxane-free tableware detergent taking alkyl glycoside (APG), lauryl sodium sulfate and fatty acid methyl ester sulfonate as main surfactants is high in manufacturing cost, and due to the fact that the Kraff point of the anionic surfactants is high, the product is easy to crystallize and separate out at low temperature, namely-8 ℃ to 0 ℃, and the use and appearance experience of consumers in cold seasons is influenced.
Disclosure of Invention
Aiming at the technical problem that most tableware detergent compositions in the existing market contain trace or small amount of by-product dioxane due to the use of fatty alcohol polyoxyethylene ether sulfate (AES), the invention provides a liquid tableware detergent composition without dioxane and a preparation method thereof. The obtained detergent composition does not contain dioxane, is safe and harmless, can keep uniform and transparent at low temperature, has low manufacturing cost, has decontamination performance higher than that of the national standard dish detergent and not inferior to that of the traditional dish detergent containing AES surfactant, and has feasibility of large-scale production.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a liquid dioxane-free dishwashing detergent composition comprising the following components in mass percent: 19-25% of anionic surfactant without polyoxyethylene group, 4-6% of amphoteric surfactant, 1-3% of nonionic surfactant without polyoxyethylene group, 0-0.5% of chelating agent, 0-0.2% of pH regulator, 0-2% of inorganic salt, 0-0.2% of preservative, 0-0.2% of essence and the balance of water.
Wherein the anionic surfactant comprises at least linear alkylbenzene sulfonate and alpha-olefin sulfonate.
Preferably, the linear alkylbenzene sulphonate and the alpha-olefin sulphonate comprise 7.5 to 8.5% and 12 to 15% respectively of the total mass of the liquid dishwashing detergent composition.
Preferably, the nonionic surfactant is an alkyl glycoside.
Preferably, the amphoteric surfactant comprises one or more of an amino acid surfactant, a betaine surfactant, an imidazoline surfactant, and an amine oxide surfactant.
Preferably, the amphoteric surfactant is cocamidopropyl amine oxide.
All the raw materials of the invention hardly contain dioxane, thus being harmless to human body and being environment-friendly. However, as described in the background of the present application, surfactants without dioxane generally have poor detergency or poor low temperature stability, and therefore, it is a great technical difficulty to develop a liquid detergent formulation without dioxane and having both high detergency and strong low temperature stability.
After long-term tests and theoretical basis combination, the team of the invention finds that when four different types of surfactants, namely linear alkyl benzene sulfonate (LAS), alpha-alkenyl sulfonate (AOS), alkyl glycoside (APG) and Cocamidopropyl Amine Oxide (CAO), are simultaneously selected and the compounding ratio of the four surfactants is strictly controlled within the range, a remarkable synergistic effect can be obtained. The composition in the proportion has the decontamination performance higher than that of national standard dish washing detergent and not inferior to that of the traditional dish washing detergent containing AES surfactant (containing dioxane), and can keep uniform and transparent at low temperature (-8-0 ℃), namely, the low-temperature stability is also excellent. When the ratio of the four components is out of the range of the present invention, the detergency or low-temperature stability is significantly reduced (see the data in the examples).
Preferably, the chelating agent comprises one or more of ethylenediamine tetraacetate EDTA, diethylenetriamine pentaacetate DTPA, methylglycine diacetate MGDA, glutamic acid diacetate GLDA, and sodium citrate dihydrate, and further preferably GLDA and MGDA.
Preferably, the preservative comprises one or more of methylisothiazolinone, methylchloroisothiazolinone, benzisothiazolinone, phenoxyethanol and paraben.
Preferably, the inorganic salt comprises one or more of a sodium salt and a magnesium salt.
A process for preparing a liquid dishwashing detergent composition comprising the steps of:
s1: and (3) taking water, controlling the water temperature to be 25-32 ℃, adding a chelating agent and most of inorganic salt, and fully stirring to form a solution.
S2: and (4) sequentially adding the anionic surfactant into the solution obtained in the step S1, fully stirring until complete neutralization, and controlling the pH of the solution to be weakly alkaline.
S3: adjusting the stirring frequency, sequentially adding an amphoteric surfactant and a nonionic surfactant into the solution obtained in the step S2, continuously stirring until the raw materials are fully mixed, and controlling the temperature of the feed liquid at 35-42 ℃.
S4: and (4) adding a pH regulator into the feed liquid obtained in the step (S3), controlling the pH value to be neutral, and simultaneously adding inorganic salt to regulate the viscosity of the solution.
S5: and (5) adding a preservative and essence into the material liquid obtained in the step (S4), controlling the temperature of the material liquid to be 30-40 ℃, stirring until the material liquid is fully dissolved, and finally standing until the solution is clear and transparent.
Preferably, in S1, the stirring speed is 20-50 r/min; in S2, the stirring speed is 30-50 r/min; in S3, the stirring speed is 30-50 r/min.
The invention has the beneficial effects that:
(1) the raw materials of the detergent composition do not contain components with dioxane, and the detergent composition is safe, harmless, green and environment-friendly.
(2) The preparation method disclosed by the invention realizes the preparation of the composition by researching the decontamination performance and low-temperature stability of the composition through strictly controlling the compounding ratio of Linear Alkylbenzene Sulfonate (LAS), alpha-alkenyl sulfonate (AOS), alkyl glycoside (APG) and Cocamidopropyl Amine Oxide (CAO). The composition can keep uniform and transparent at low temperature, has low cost, has decontamination performance higher than that of national standard dish washing detergent and no difference from the traditional dish washing detergent containing AES surfactant, and has feasibility of large-scale production.
Detailed Description
The present invention will be further described with reference to the following examples.
General examples
A liquid dioxane-free dishwashing detergent composition comprising the following components in mass percent: 19-25% of anionic surfactant without polyoxyethylene group, 4-6% of amphoteric surfactant, 1-3% of nonionic surfactant without polyoxyethylene group, 0-0.5% of chelating agent, 0-0.2% of pH regulator, 0-2% of inorganic salt, 0-0.2% of preservative, 0-0.2% of essence and the balance of water.
Wherein the anionic surfactant comprises at least linear alkylbenzene sulfonate and alpha-olefin sulfonate.
Preferably, the linear alkylbenzene sulphonate and the alpha-olefin sulphonate comprise 7.5 to 8.5% and 12 to 15% respectively of the total mass of the liquid dishwashing detergent composition.
Preferably, the nonionic surfactant is an alkyl glycoside.
Preferably, the amphoteric surfactant comprises one or more of an amino acid surfactant, a betaine surfactant, an imidazoline surfactant, and an amine oxide surfactant.
Preferably, the amphoteric surfactant is cocamidopropyl amine oxide.
Preferably, the chelating agent comprises one or more of ethylenediamine tetraacetate EDTA, diethylenetriamine pentaacetate DTPA, methylglycine diacetate MGDA, glutamic acid diacetate GLDA, and sodium citrate dihydrate, and further preferably GLDA and MGDA.
Preferably, the preservative comprises one or more of methylisothiazolinone, methylchloroisothiazolinone, benzisothiazolinone, phenoxyethanol and paraben.
Preferably, the inorganic salt comprises one or more of a sodium salt and a magnesium salt.
A process for preparing a liquid dishwashing detergent composition comprising the steps of:
s1: and (3) taking water, controlling the water temperature to be 25-32 ℃, adding the chelating agent and most of the inorganic salt, and fully stirring to form a solution, wherein the stirring speed is 20-50 r/min.
S2: and (4) sequentially adding the anionic surfactant into the solution obtained in the step S1, fully stirring until complete neutralization, wherein the stirring speed is 30-50r/min, and the pH of the solution is controlled to be alkalescent.
S3: adjusting the stirring frequency, sequentially adding the amphoteric surfactant and the nonionic surfactant into the solution obtained in the step S2, continuously stirring until the raw materials are fully mixed, wherein the stirring speed is 30-50r/min, and the temperature of the material liquid is controlled at 35-42 ℃.
S4: and (4) adding a pH regulator into the feed liquid obtained in the step (S3), controlling the pH value to be neutral, and simultaneously adding inorganic salt to regulate the viscosity of the solution.
S5: and (5) adding a preservative and essence into the material liquid obtained in the step (S4), controlling the temperature of the material liquid to be 30-40 ℃, stirring until the material liquid is fully dissolved, and finally standing until the solution is clear and transparent.
Stability of the specific examples: the heat and cold stability was evaluated according to the regulations in GB/T9985 "hand dishwashing detergents". Heat resistance stability: keeping the temperature at (40 +/-2) ℃ for 24h, and after the temperature is restored to room temperature, the temperature is not obviously changed from the room temperature before the experiment, and the stability is good and marked as √; cold resistance stability: keeping at (-8 + -2) deg.C for 24h, taking out, observing immediately, and observing without obvious change before experiment, showing good stability, and marked as √ "
And (3) testing the decontamination performance: the detergency was evaluated according to the foam level method and arbitration method of GB/T9985 "hand dishwashing detergents". Recording the number of dishes and the oil removal rate data of each example, and respectively calculating the ratio of the number of dishes to the number of dishes of the national standard dish washing detergent and the oil removal rate data, wherein the ratio data is more than 1, and the decontamination performance is superior to that of the national standard dish washing detergent; a ratio of less than 1 indicates a poorer detergency than the state standard dishwashing detergent.
As can be seen from the data of examples 1, 2 and 3 and comparative examples 1, 2, 3 and 4, when the mass ratio of AOS to LAS is within the preferred range of the present invention, the cold resistance and frost resistance of the formula are better, when the mass ratio of AOS to LAS is beyond the ratio of AOS to LAS, the low temperature stability of the formula is in a poor state, crystals are precipitated at-5 ℃ and tend to be in a turbid state, such as comparative examples 1, 2, 3 and 4, and when LAS is continuously increased in the formula, the lower the low temperature stability of the formula is, the turbid state appears at 0 ℃; in the above examples, the resulting formulations are superior to state standard dishwashing detergents in both dish count and grease removal performance.
| Components | Example 4 | Example 5 | Example 6 | Comparative example 5 | Comparative example 6 |
| LAS | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 |
| AOS | 15 | 15 | 15 | 15 | 15 |
| CAO | 6 | 5 | 4 | 3 | 7 |
| APG | 1 | 2 | 3 | 4 | 0.5 |
| Citric acid monohydrate | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 |
| GLDA-4Na | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| NaCl | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 |
| Kathon | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 |
| Lemon essence | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Deionized water | To100 | To100 | To100 | To100 | To100 |
| 10％pH | 7.48 | 7.51 | 7.54 | 7.49 | 7.50 |
| Stability at 45 ℃ | √ | √ | √ | √ | √ |
| Stability at 0 deg.C | √ | √ | √ | Turbidity | √ |
| Stability at-5 deg.C | √ | √ | √ | Turbidity | √ |
| Stability at-8 deg.C | √ | √ | Turbidity | Turbidity | √ |
| Ratio of number of dishes washed | 2.15 | 1.75 | 1.65 | 0.96 | 2.35 |
| Specific oil removal rate | 1.03 | 1.05 | 1.10 | 1.21 | 0.90 |
Examples 4, 5, 6 investigate the effect of alkyl glycoside (APG) and Cocamidopropyl Amine Oxide (CAO) content on the stability and performance of the compositions. Comparing examples 4, 5 and 6 with comparative examples 5 and 6, when the content of the alkyl glycoside APG in the formula is increased, the synergistic effect on the oil removal of the formula is more obvious, namely the oil removal rate of the formula combination is better along with the increase of the amount of the alkyl glycoside, when the content of the APG is less than 1%, the low-temperature freezing resistance of the formula is better, but the oil removal rate is lower than the national standard tableware detergent, and when the content of the APG is higher, like the comparative example 5, although the oil removal rate of the formula is increased, the low-temperature stability of the formula is reduced, crystals are separated out under the conditions of-5 ℃ and 0 ℃, a turbid state appears, mainly because the freezing point of the alkyl glycoside (APG) is low, and the low-temperature freezing resistance of the formula is influenced when the dosage is used; on the other hand, the CAO has little influence on the low-temperature stability of the formula, but mainly influences the dish washing number of the formula, when the CAO content is higher, as in example 4 and comparative example 6, the formula has better low-temperature performance, and the dish washing number is higher, and as the CAO proportion is reduced, as in examples 4, 5, 6 and comparative example 5, the dish washing number of the formula is reduced, and even is lower than that of the national standard dish washing detergent, as in comparative example 5.
| Components | Example 7 | Comparative example 7 | Comparative example 8 | Comparative example 9 | Comparative example 10 |
| LAS | 7.5 | - | 7.5 | 7.5 | 7.5 |
| AOS | 15 | 15 | - | 15 | 15 |
| CAO | 5 | 5 | 5 | - | 5 |
| APG | 2 | 2 | 3 | 4 | - |
| K12 | - | 8 | 6 | 1.5 | 1 |
| Citric acid monohydrate | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 |
| GLDA-4Na | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| NaCl | 0.9 | 0.9 | 0.9 | 0.9 | 0.9 |
| Kathon | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 |
| Lemon essence | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Deionized water | To100 | To100 | To100 | To100 | To100 |
| 10％pH | 7.53 | 7.45 | 7.43 | 7.48 | 7.52 |
| Stability at 45 ℃ | √ | √ | √ | √ | √ |
| Stability at 2 DEG C | √ | Turbidity | Turbidity | Turbidity | Turbidity |
| Stability at 0 deg.C | √ | Turbidity | Turbidity | Turbidity | Turbidity |
| Stability at-5 deg.C | √ | Turbidity | Turbidity | Turbidity | Turbidity |
| Stability at-8 deg.C | √ | Turbidity | Turbidity | Turbidity | Turbidity |
| Ratio of number of dishes washed | 1.75 | 1.21 | 1.65 | 0.96 | 1.85 |
| Specific oil removal rate | 1.03 | 0.92 | 0.98 | 1.01 | 0.85 |
Comparative examples 7, 8, 9, 10 use sodium lauryl sulfate (K12) without polyoxyethylene groups in equal proportions instead of LAS, AOS, APG and CAO, respectively, of example 7, investigating formulation stability and performance of K12 in this formulation system combination. As can be seen from the data in the table, after replacing LAS, AOS, APG and CAO respectively with K12 in equal proportion, the formula has poor cold resistance and frost resistance at low temperature, and the composition has crystal precipitation and a turbid state at 0 ℃ or even 2 ℃, so that the surfactant in the invention can not be replaced by any surfactant without dioxane. Only when the surfactant of the specific composition of the present invention is selected, can both low temperature freeze resistance and stain release be achieved.
Example 8 and comparative example 11 the stability and performance of dioxane-free dishwashing detergent was investigated against a conventional AES surfactant containing dishwashing detergent. The results show that the number of the washed dishes and the oil removal rate of the composition formula provided by the invention are not inferior to those of the traditional surface active detergent containing AES (even the ratio of the number of the washed dishes is improved to a certain extent), and meanwhile, the composition provided by the invention is not only superior to that of the traditional surface active detergent containing AES in low-temperature cold resistance and frost resistance, but also does not contain the risk of dioxane in the formula, and is more in line with the development trend of green washing.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (6)
1. A dioxane-free liquid dishwashing detergent composition characterized by: comprises the following components in percentage by mass: 19-25% of anionic surfactant without polyoxyethylene group, 4-6% of amphoteric surfactant cocamidopropyl amine oxide, 1-3% of nonionic surfactant alkyl glycoside without polyoxyethylene group, 0-0.5% of chelating agent, 0-0.2% of pH regulator, 0-2% of inorganic salt, 0-0.2% of preservative, 0-0.2% of essence and the balance of water;
wherein the anionic surfactant comprises at least linear alkylbenzene sulfonate and alpha-olefin sulfonate; and the linear alkylbenzene sulfonate and the alpha-olefin sulfonate respectively account for 7.5-8.5% and 12-15% of the total mass of the liquid dishwashing detergent composition.
2. A liquid dishwashing detergent composition according to claim 1 wherein said chelating agent comprises one or more of ethylenediaminetetraacetate, diethyltriaminepentaacetate, methylglycine diacetate, glutamic acid diacetate, and sodium citrate dihydrate.
3. The liquid dishwashing detergent composition of claim 1, wherein said preservative comprises one or more of methylisothiazolinone, methylchloroisothiazolinone, benzisothiazolinone, phenoxyethanol, and paraben.
4. The liquid dishwashing detergent composition of claim 1, wherein said inorganic salt comprises one or more of a sodium salt and a magnesium salt.
5. A process for preparing a liquid dishwashing detergent composition according to any of claims 1 to 4, characterized by the steps of:
s1: taking water, controlling the water temperature to be 25-32 ℃, adding a chelating agent and most of inorganic salt, and fully stirring to form a solution;
s2: sequentially adding an anionic surfactant into the solution obtained in the step S1, fully stirring until the solution is completely neutralized, and controlling the pH of the solution to be alkalescent;
s3: adjusting the stirring frequency, sequentially adding an amphoteric surfactant and a nonionic surfactant into the solution obtained in the step S2, continuously stirring until the raw materials are fully mixed, and controlling the temperature of the feed liquid at 35-42 ℃;
s4: adding a pH regulator into the feed liquid obtained in the step S3, controlling the pH to be neutral, and simultaneously adding the residual inorganic salt to regulate the viscosity of the solution;
s5: and (5) adding a preservative and essence into the material liquid obtained in the step (S4), controlling the temperature of the material liquid to be 30-40 ℃, stirring until the material liquid is fully dissolved, and finally standing until the solution is clear and transparent.
6. The method of claim 5, wherein:
in S1, the stirring speed is 20-50 r/min; and/or
In S2, the stirring speed is 30-50 r/min; and/or
In S3, the stirring speed is 30-50 r/min.
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