Background
The amino acid shampoo in the market generally has the problems of high cost and low foam. Mainly because the surface activity cost of amino acid is high, the cheapest amino acid is more than 12 yuan/kg, and the expensive amino acid is even nearly hundred yuan/kg. The foam height of the amino acid surfactant is lower than that of the common sulfate surfactant, the amino acid surfactant has the biggest problem of difficult thickening, and the conventional shampoo thickener cannot thicken effectively or has obvious defoaming, such as cocamide MEA, PEG-150 distearate, PEG-120 methyl glucose dioleate and acrylic acid (ester) copolymer, and the thickening effect is very limited. In recent years, products effective in thickening amino acids have been developed such as PEG-120 methyl glucose triisostearate, PEG-150 pentaerythritol tetrastearate, and acrylic acid (ester)/C10-30 alkanol acrylate crosslinked polymers to solve the problem of difficult thickening, but they have various problems such as high cost, defoaming, necessity of heating, and complicated process.
In addition, in the prior art, only an amphoteric surfactant is used for thickening amino acid surfactant, for example, ruhaiwei studies on amino acid type/amphoteric surfactant combination, and as a result, it is found that cocoamido betaine has different thickening effects on different amino acid surfactants, and has thickening effects on sodium lauroyl sarcosinate and sodium cocoyl alaninate, but has no effective thickening effect on sodium lauryl glutamate, sodium cocoyl methyltaurate and sodium cocoyl glycinate (ruhaiwei, amino acid type/amphoteric surfactant combination thickening system and rheology research [ D ]. university of eastern science and technology, 2013.). Therefore, the thickening of the amphoteric surfactant on the amino acid surfactant is limited by the type and pH of the amino acid surfactant, the type and ratio of the amphoteric surfactant, and the like.
Disclosure of Invention
The present invention aims to provide a composition capable of effectively thickening various types of amino acid-based surfactants.
It is also an object of the present invention to provide a low cost composition for thickening amino acid based surfactants.
The invention also aims to provide an amino acid composition with good foaming effect and lasting foam.
It is also an object of the present invention to provide a composition which does not require the addition of an additional thickener.
The above object of the present invention is achieved by the following technical means:
in one aspect, the present invention provides a composition comprising the following components in weight percent:
15% -50% of amino acid surfactant;
10 to 30 percent of alpha olefin sodium sulfonate;
10 to 50 percent of betaine surfactant.
The composition comprises the following components in percentage by weight:
20-45% of amino acid surfactant;
10 to 30 percent of alpha olefin sodium sulfonate;
15 to 45 percent of betaine surfactant.
Wherein the amino acid surfactant is selected from one or more of methyl fatty acyl taurate, fatty acyl sarcosinate, fatty acyl glutamate and fatty acyl alanate.
Wherein the weight ratio of the alpha olefin sodium sulfonate to the betaine surfactant is 0.8-1.2: 1.8-2.4.
Further, the methyl fatty acyl taurate is selected from one or more of sodium methyl cocoyl taurate, sodium methyl myristoyl taurate, sodium methyl stearyl taurate, sodium cocoyl methyl taurate and sodium methyl lauroyl taurate; the fatty acyl sarcosine salt is selected from one or more of sodium lauroyl sarcosine, sodium myristoyl sarcosine, sodium cocoyl sarcosine and sodium palmitoyl sarcosine; the fatty acyl glutamate is selected from one or more of myristoyl sodium glutamate, cocoyl sodium glutamate, stearoyl sodium glutamate and lauroyl sodium glutamate; the fatty acyl alaninate is selected from one or more of sodium cocoyl amido propionate, sodium lauroyl propionate and sodium lauroyl methyl amino propionate;
as a preferred embodiment, the amino acid surfactant is selected from sodium methylcocoyl taurate.
Wherein the sodium alpha olefin sulfonate is selected from one or more of sodium C12-14 olefin sulfonate, sodium C14-16 olefin sulfonate, sodium C14-18 olefin sulfonate and sodium C16-18 olefin sulfonate; in a preferred embodiment, the sodium alpha olefin sulfonate is selected from the group consisting of sodium C12-14 olefin sulfonates.
The betaine surfactant is not particularly limited, and any betaine surfactant can be used to thicken the system of the present invention. Specifically, combinations such as one or more of cocohydroxy sulfobetaine, cocobetaine, cocoyl/oleamidopropyl betaine, cocamidopropyl betaine, lauryl hydroxy sulfobetaine, lauryl betaine, lauramidopropyl hydroxysulfobetaine, and lauramidopropyl betaine are all possible.
The composition of the present invention may be used in cleansing products such as shampoos, shower or face lotions and the like.
As an exemplary embodiment, the composition of the present invention is used for a shampoo, and in addition to the above-mentioned composition, the shampoo of the present invention may further contain components commonly used in shampoos, such as a cationic conditioner, a pH adjustor, a preservative, and other modifiers commonly used in shampoos, and the like.
In a preferred embodiment, the cationic conditioning agent is one or more selected from polyquaternium-6, polyquaternium-10, polyquaternium-22, polyquaternium-47, polyquaternium-67, polyquaternium-73, guar hydroxypropyl trimonium chloride, etc.;
as a preferable embodiment, the pH regulator is one or more selected from citric acid, sodium citrate, sodium hydroxide, potassium hydroxide, triethanolamine and other conventional pH regulators.
In a preferred embodiment, the shampoo of the present invention further comprises 0.01 to 5% of a humectant. Further, the humectant is selected from one or more of polyalcohol, betaine, sodium hyaluronate, sodium PCA, panthenol and the like.
As a preferred embodiment, the shampoo provided by the invention comprises the following components in percentage by weight:
preferably, the composition further comprises a balance of water.
Optionally, the oil and fat is common hair conditioner such as silicone oil, PEG-7 glyceryl cocoate, linoleamidopropyl PG-dimethyl ammonium chloride phosphate, C12-13 alcohol lactate, PPG-3 octyl ether, etc.
As a more preferred embodiment, it contains the following components in weight percent:
on the other hand, the invention also provides a preparation method of the shampoo, which comprises the following steps:
s1: adding a cationic conditioner into water, and dispersing;
s2: adding betaine surfactant, stirring, adding amino acid surfactant, and adding alpha olefin sodium sulfonate;
preferably, the method further comprises S3: further adding one or more of humectant, oil and fat, and pH antiseptic, and stirring to uniform.
As a further alternative, the method comprises:
s1: adding a proper amount of water at low temperature, adding a cationic conditioner, and dispersing well;
s2: adding betaine surfactant, stirring for 1 min, adding amino acid surfactant, and adding alpha olefin sodium sulfonate (starting to heat at the moment if there is a material to be heated and dissolved later);
s3: adding the rest raw materials in the formula, and stirring uniformly to discharge.
As described in the background art, amino acid surfactants are difficult to thicken, and even if some surfactants can thicken amino acid surfactants, the problems of high cost, defoaming, limited thickening and the like exist. Therefore, the inventors have intensively studied a shampoo system which can effectively thicken amino acid-based surfactant and has a low cost and a good foaming effect. A large number of experimental researches show that the alpha olefin sodium sulfonate and the betaine surfactant are compounded, so that a system with various viscosities of amino acid shampoo can be effectively constructed, the thickening effect on most amino acid surfactants is achieved, the cost is low, and the foaming effect is good. The thickening regulation effect is more remarkable under the condition of specific compounding ratio.
The alpha olefin sodium sulfonate has no thickening effect, and can effectively thicken amino acid surfactants by compounding with betaine surfactants, and has good foaming effect and lasting foam.
The invention has the beneficial effects that:
1. from the thickening effect, the alpha olefin sodium sulfonate and the betaine surfactant have obvious thickening capability on various amino acid surfactants and have obvious help on the foam height of an amino acid formula.
2. The stability of the foam can be improved by compounding the alpha olefin sodium sulfonate, the betaine surfactant and the amino acid surfactant.
3. Meanwhile, under the condition of appropriate proportion, the cost of the amino acid system formula can be greatly reduced, and the problem that the amino acid system in the market is high in cost and difficult to popularize is solved.
The high cost of the amino acid system is caused by two reasons, namely that the surface activity of the amino acid is basically over 10 yuan/KG, sodium sarcosine is the cheapest, the other amino acid is over 20 yuan, the content of active substances is only 30 percent, and the active substances are one time or several times more expensive than the conventional AES, the foaming power of the AES is not good, if the amino acid is used alone, the content of the active substances is higher, the higher surface activity of the amino acid brings higher thickening difficulty, the cost of the raw materials for effective thickening is far higher than that of CMEA, DOE120 and SF-1 which are commonly used in AES shampoo, and the cost of the optical thickening agent is 1-3 yuan. In conclusion, the prepared amino acid shampoo has the cost of more than 12 yuan, even 30 yuan even if the conditioning is poor.
The lowest cost of the amino acid shampoo of the composition is about 7 yuan, which is far lower than the average level of the market.
4. The composition can be used for cold blending in shampoo production, greatly reduces working hours, improves productivity, and is efficient and energy-saving. The conventional shampoo is prepared by water, the production time is about 3 hours, and the composition is applied by only one pot for production for about 1 hour.
Detailed Description
The technical solutions of the present invention are further illustrated by the following specific examples, which do not represent limitations to the scope of the present invention. Insubstantial modifications and adaptations of the present invention by others of the concepts fall within the scope of the invention.
Viscosity test method: 12rpm of 4# rotor below 50000 viscosity
6rpm of 4# rotor above 50000 viscosity
Foam height national standard Roche foam test method
Example 1 verification of the synergistic thickening amino acid-based surfactant of different weight percentages of betaine surfactant with different weight percentages of sodium alpha olefin sulfonate
In order to verify the effect of different weight percentages of components and different amino acid types on foaming and thickening effects, etc., the inventors designed the following 3 protocols. From scheme 1 to scheme 3, the weight percentages of betaine surfactant and alpha olefin sodium sulfonate are gradually increased, and for each scheme, the influence of different kinds of amino acid surfactant on foaming, thickening effect and the like is also designed. The specific scheme is as follows:
TABLE 1 physicochemical Properties of combinations prepared with different amino acid surfactants in scheme 1
TABLE 2 physicochemical Properties of combinations prepared with different amino acid surfactants in scheme 2
Note: the sodium lauroyl glutamate formulation contains two points of thickener, cocamide MEA.
TABLE 3 physicochemical Properties of combinations prepared with different amino acid surfactants in scheme 3
Note: the sodium lauroyl glutamate formulation contains two points of thickener, cocamide MEA.
From the above three experimental protocols, the following conclusions can be drawn
1. With the increase of the surface activity of the amphoteric betaine and the amount of the alpha olefin sodium sulfonate, the viscosity of other systems except sodium lauroyl glutamate is obviously improved, and particularly, the high-viscosity system can be achieved under the condition of lower surface activity of the amphoteric betaine and the addition amount of the alpha olefin sodium sulfonate. While the sodium lauroyl glutamate system, even if increasing the amphoteric betaine surfactant level and the sodium alpha olefin sulfonate level, with this combination, can easily increase from 0 viscosity to 2000 to 32000 viscosity with only two points of cocoamide methyl MEA addition. And if only the betaine surfactant is adopted and the alpha olefin sodium sulfonate is not added, even if a large amount of thickener cocamide MEA is added, the sodium lauroyl glutamate system cannot be thickened. The sodium alpha olefin sulfonate and the amphoteric betaine are proved to be capable of obviously and synergistically thickening the amino acid surfactant system under the condition of reasonable collocation.
2. From a comparison of scheme 1 and scheme 2, it is concluded that with increasing amounts of amphoteric betaine surfactant and alpha olefin sodium sulfonate, the foam height of the other systems, except for sodium methylcocoyltaurate, is increased and more stable.
3. From the comparison of scheme 2 and scheme 3, it is concluded that the viscosity of the system can be significantly increased with decreasing amount of amino acid surfactant. It was further verified that the combination was effective in thickening amino acid surface activity.
4. The system of the invention can effectively thicken the sodium glycinate surfactant, but has a common foaming effect, so that the sodium glycinate surfactant is not suitable for being used as the main surface of amino acid of shampoo for shampoo requiring large foaming.
Example 2 demonstrates the effect of varying amounts of amphoteric betaine surfactant, the ratio to sodium alpha olefin sulfonate on the thickening effect of amino acid surfactant, and the effect of pH on system viscosity
Table 4.
The thickening capacity of the composition changes with the change of the ratio of the alpha olefin sodium sulfonate to the amino acid surfactant, and through experimental investigation and experience of an inventor, when the weight ratio of the alpha olefin sodium sulfonate to the betaine surfactant is 0.8-1.2: 1.8-2.4, the formula has higher viscosity. In addition, as can be seen from the above table, changes in pH affect the viscosity. The highest viscosity of sodium sarcosinate is about 6.0, and parabola appears according to different pH values, and the specific peak value can be changed according to different formulas.
In general, lowering the pH appropriately increases the viscosity of the composition, such as formula D, since the pH is still relatively high, but the viscosity is not as high, and continuing to increase citric acid decreases the pH and increases the viscosity. However, when the weight ratio of the sodium alpha olefin sulfonate to the betaine surfactant is outside the selected range of the present invention, there is no effect of improving viscosity even if the pH is lowered, such as formula E, formula F.
EXAMPLE 4 preparation and testing of several amino acid shampoos
Several shampoos were prepared according to the formulations of table 5, table 6, table 7.
The preparation method comprises the following steps: s1: adding a proper amount of water at low temperature, adding a cationic conditioner, and dispersing well;
s2: adding betaine surfactant, stirring for 1 min, adding amino acid surfactant, and adding alpha olefin sodium sulfonate;
s3: adding the rest raw materials in the formula, and stirring uniformly to discharge.
TABLE 5 Cocoamide sodium taurate shampoo
TABLE 6 monosodium glutamate shampoo
TABLE 7 sarcosine sodium shampoo
TABLE 8 Properties of different amino acid shampoos
|
Viscosity mPA. s
|
Height mm of foam
|
Effect
|
Shampoo of Table 5
|
15000
|
150
|
Is soft and smooth
|
Shampoo of Table 6
|
4500
|
140
|
Light and wet comb
|
Shampoo of Table 7
|
6000
|
140
|
Good effect of softening and drying hair |
The amino acid shampoos represented in tables 5-7 have a viscosity of at least 4500, especially the shampoo containing sodium methylcocoyl taurate. The heights of the three parts are not greatly different and all reach 140 mm.
Example 5
The formulation of scheme 1, with the appropriate addition of a macromolecular cationic conditioning agent, allows the formulation to be thickened at low surfactant levels.
Scheme 1 addition of macromolecular cationic conditioner
TABLE 9 physicochemical Properties of combinations prepared with different amino acid surfactants in scheme 1
Compared with scheme 1, the embodiment adds the cationic conditioner, compared with the physicochemical property of scheme 1 in the table 1, after a small amount of cationic conditioner is added, the combined viscosity of all kinds of amino acids is greatly improved, most of the combinations without viscosity reach the viscosity of more than 1000, and the height of the foam is slightly reduced.