Soap-based composition with foam stabilizing effect, preparation method of soap-based composition and facial cleanser

Abstract

The invention relates to the technical field of cosmetics, in particular to the field of IPC C11D10, and more particularly relates to a soap-based composition with a foam stabilizing effect, a preparation method of the soap-based composition and a facial cleanser. Comprising a component A and a component B, the component A comprises fatty acid with the carbon chain length of 12-18, the component B comprises alkali liquor, and the mass ratio of the component A to the component B is (6-8): (2-4). The soap-based composition disclosed by the invention has dense and fine foam, after being rubbed and foamed, the soap-based composition is easy to form submicron foam, is dense and fine, the foam is durable on the skin and is not easy to extinguish, and the foam can be rapidly broken when being washed by water, and does not generate secondary foaming or a large amount of foam waste liquid. Meanwhile, the slippery feeling is excellent, the friction feeling between palms and the face is reduced, the slippery feeling is lasting and dense, flushing is easy in the flushing process, the good clean feeling is obtained, and the sticky feeling and the false slippery feeling cannot be generated.

Description

Technical Field

[0001] The invention relates to the technical field of cosmetics, in particular to the field of IPC C11D10, and more specifically to a soap base composition with a foam stabilizing effect, a preparation method thereof, and a facial cleanser. Background Art

[0002] Soap-based facial cleansers are a common type of daily cleaning cosmetics. Soap-based facial cleansers are dry and non-irritating after washing, have a smooth feel after drying, are low in cost, have no jelly phenomenon at low temperatures, have strong cleaning ability, are easy to wash, and have a unique pearlescent effect that makes the product more attractive to consumers. Although soap-based facial cleansers have many advantages, their cleaning ability is too strong, and they clean the skin oil too thoroughly, causing strong tightness after washing. At the same time, tap water contains more inorganic salt ions such as calcium and magnesium, which are easy to react with higher fatty acid soaps to form fatty acid magnesium and fatty acid calcium that are insoluble in water. This type of substance is easily adsorbed on human skin, causing consumers to have a strong astringent feeling during the rinsing process and after washing. This has a negative impact on consumers' user experience.

[0003] CN108085196A discloses a composition for soap-based cleansing products, which comprises the following components by weight percentage: 1-10wt% of cationic polymer; 35-55wt% of polyol; and 35-64wt% of water-soluble emollient. After adding the composition of the present invention, soap-based cleansing products can enhance the skin feel such as mildness and moisturizing during cleansing, and greatly improve the moisturizing ability of the skin after cleansing, thereby solving the problem of dry face after cleansing of soap-based cleansing products, but the foaming property and skin feel of the composition are not explored. Summary of the invention

[0004] The first aspect of the present invention provides a soap base composition with a foam stabilizing effect, comprising: a component A and a component B, wherein the component A comprises a fatty acid with a carbon chain length of 12-18, the component B comprises an alkali solution, and the mass ratio of the component A to the component B is (6-8):(2-4).

[0005] The fatty acid comprises lauric acid and myristic acid, and the weight ratio of the lauric acid to the myristic acid is 1:(1-10).

[0006] Preferably, the fatty acid comprises lauric acid and myristic acid, and the weight ratio of lauric acid to myristic acid is 1:(1-9).

[0007] The fatty acid further includes a fatty acid with a carbon chain length of 15-18, and the fatty acid with a carbon chain length of 15-18 includes any one of palmitic acid and stearic acid.

[0008] The weight ratio of myristic acid, lauric acid and fatty acid with a carbon chain length of 15-18 is 1:(1-9):(1-6).

[0009] The weight ratio of myristic acid, lauric acid and fatty acid with a carbon chain length of 15-18 is 1:(1-7):(1-4).

[0010] The fatty acid includes lauric acid and myristic acid, and the weight ratio of lauric acid to myristic acid is 1: (1-10). The foaming speed can be increased and the foam stability can be balanced. The myristic acid salt-forming substance with a slightly longer carbon chain has uniform and fine foam, and the foam is stable when the temperature rises, but it is easily affected by hard water and salts. The addition of appropriate lauric acid can further increase the foaming speed of the salt formed, which may be due to the presence of hydrophilic double bonds and increased solubility in water. Further studies have found that adding fatty acids with a carbon chain length of 15-18 can reduce the irritation of the composition and improve the skin feel after washing.

[0011] Further preferably, the amount of the fatty acid with a carbon chain length of 15-18 is not higher than that of myristic acid.

[0012] The second aspect of the present invention provides a method for preparing a soap-based composition with a foam-stabilizing effect, comprising the following steps:

[0013] S1, taking fatty acids, adding water respectively, heating and stirring in a water bath at 75-90°C to obtain fatty acid solutions;

[0014] S2, preparing alkali solution;

[0015] S3, adding the alkali solution to the fatty acid solution, keeping the temperature for reaction for 20-60 minutes, stirring and cooling to obtain a fatty acid salt solution;

[0016] S4. Weigh the fatty acid salt according to the formula ratio, stir and mix evenly, defoam, and cool to room temperature.

[0017] The third aspect of the present invention provides a facial cleanser, which comprises, by weight percentage, 30-70% of a soap base composition, 1-10% of a polyol, 5-30% of a surfactant composition, 1-7% of a thickener, and the balance made up of water.

[0018] The polyol includes at least one of PEG-8, PEG-32, PEG-6, dipropylene glycol, 1,3-propylene glycol, and glycerol.

[0019] Preferably, the polyol includes at least one of PEG-6, dipropylene glycol, and 1,3-propylene glycol.

[0020] The surfactant composition comprises an amphoteric surfactant, a nonionic surfactant and a cationic surfactant.

[0021] Preferably, the amphoteric surfactant is selected from betaine surfactants, including at least one of lauryl betaine, cocoyl betaine, cocamidopropyl betaine, lauryl amidopropyl betaine, sodium cocoyl propionate, sodium cocoyl glycinate, sodium methyl cocoyl taurate, sodium methyl cocoyl taurate, and lauryl hydroxysulfobetaine.

[0022] Preferably, the nonionic surfactant includes at least one of lauryl alcohol polyether carboxylate-6, C8-14 alkyl glucoside, and C12-14 alkyl glucoside.

[0023] Preferably, the cationic surfactant includes polyquaternium-7 and polyquaternium-39.

[0024] Preferably, polyquaternium-7 is prepared by combining two substances with different molecular weights, including low molecular weight polyquaternium-7 and high molecular weight polyquaternium-7, wherein the low molecular weight polyquaternium-7 has an average molecular weight of 100,000 to 200,000, and the high molecular weight polyquaternium-7 has an average molecular weight of 1.6 million.

[0025] Preferably, the weight ratio of the low molecular weight polyquaternium salt-7 to the high molecular weight polyquaternium salt-7 is 1:(2-4).

[0026] Further preferably, the weight ratio of the low molecular weight polyquaternium salt-7 to the high molecular weight polyquaternium salt-7 is 1:4.

[0027] Preferably, the average molecular weight of the polyquaternium-39 is 1.5-1.8 million.

[0028] The thickener includes at least one of an acrylic acid ester copolymer and cellulose.

[0029] Preferably, the thickener comprises acrylic acid ester copolymer and cellulose.

[0030] Beneficial Effects

[0031] 1. The soap-based composition of the present application has dense and delicate foam. After rubbing and foaming, it is easy to form ultra-micron foam, which is dense and delicate. The foam lasts on the skin and is not easy to eliminate. When washed with water, it can be quickly broken without secondary foaming or a large amount of foam waste liquid.

[0032] 2. The soap-based composition of the present application has an excellent sense of slip, reduces the friction between the palm and the face, is long-lasting and dense, but is easy to flush during the flushing process, obtains a good sense of cleanliness, and does not produce a sticky feeling or a false sense of slipperiness.

[0033] 3. The fatty acid comprises lauric acid and myristic acid, and the weight ratio of lauric acid to myristic acid is 1:

[0034] (1-10). It can improve the foaming speed and balance the foam stability.

[0035] 4. The fatty acid includes fatty acids with a carbon chain length of 15-18, which can reduce the irritation of the composition and improve the skin feel after washing.

[0036] 5. The weight ratio of myristic acid, lauric acid and fatty acid with a carbon chain length of 15-18 is 1:(1-9):

[0037] (1-6), the foam separation percentage is less than 75%. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 These are rubbing test diagrams of Examples 13, 16, 17, and 19, wherein from left to right they are Examples 13, 16, 17, and 19, respectively.

[0039] Figure 2 These are rubbing test diagrams of comparative examples 8, 9, 10, and 11, wherein from left to right they are comparative examples 8, 9, 10, and 11. DETAILED DESCRIPTION

[0040] Examples 1-12

[0041] A soap base composition with a foam stabilizing effect, measured by weight, is shown in Table 1:

[0042] Table 1

[0043]

[0044] A method for preparing a soap-based composition with a foam-stabilizing effect:

[0045] S1, take 10 parts of fatty acids, add 50 parts of water respectively, heat and stir in a water bath at 85°C to obtain fatty acid solutions;

[0046] S2, preparing a potassium hydroxide aqueous solution, weighing an appropriate amount of potassium hydroxide, and adding it to the remaining aqueous solution;

[0047] S3, adding 40 parts of potassium hydroxide aqueous solution to the fatty acid solution, respectively, until the fatty acid is 100% neutralized, keeping the temperature for 30 minutes, stirring and cooling to obtain a fatty acid salt solution;

[0048] S4, weigh the fatty acid salt solutions according to the formula in Table 1, stir and mix evenly, defoam, and cool to obtain.

[0049] The fatty acids in Examples 1, 3, 5, 7, 8, 9, and 11 are lauric acid, myristic acid, and palmitic acid (fatty acids with a carbon chain length of 15), and the fatty acids in Examples 2, 4, 6, 10, and 12 are lauric acid, myristic acid, and stearic acid (fatty acids with a carbon chain length of 18).

[0050] Examples 13-20

[0051] A facial cleanser, the formula of which is shown in Table 2 by weight percentage:

[0052] Table 2

[0053]

[0054]

[0055] A facial cleanser, the preparation method is as follows:

[0056] Step 1: weigh the soap composition, polyol, auxiliary surfactant (nonionic and zwitterionic surfactant) in sequence, add 30% deionized water, stir and heat to 80°C, and stir evenly until the solution is uniform and free of bubbles.

[0057] Step 2: Weigh thickener hydroxypropyl cellulose, add it to 5% 80°C hot water, stir evenly, and add it to the mixed solution prepared in step 1.

[0058] Step 3: Weigh the thickener-acrylate copolymer, add 3% deionized water solution to disperse the acrylate copolymer, stir evenly, slowly add it to the mixed solution of step 2, stir evenly, and cool down.

[0059] Step 4: Cool down to 60°C, add the remaining amount of water used in advance to mix and stir the cationic composition, stir the material evenly, cool to 40-45°C, and after the material is completely stirred, it can be discharged.

[0060] Comparative Examples 1-7

[0061] A soap-based composition, measured by weight, as shown in Table 3:

[0062] Table 3

[0063] Components / Comparative Examples 1 2 3 4 5 6 7 Potassium laurate solution 7 7 10 10 14 20 5 Potassium myristate solution 20 20 15 15 15 8 5 Potassium palmitate solution 3 0 5 0 0 0 0 Potassium stearate solution 0 3 0 5 1 2 20

[0064] A method for preparing a soap-based composition with a foam-stabilizing effect:

[0065] S1, take 10 parts of fatty acid, add 50 parts of water respectively, heat and stir in a water bath at 85°C to obtain a fatty acid solution;

[0066] S2, preparing potassium hydroxide aqueous solution;

[0067] S3, adding 40 parts of potassium hydroxide aqueous solution to the fatty acid solution, respectively, until the fatty acid is 100% neutralized, stirring and cooling to obtain a fatty acid salt solution;

[0068] S4, weigh the fatty acid salt solutions according to the formula in Table 1, stir and mix evenly, defoam, and cool to obtain.

[0069] The fatty acids in Comparative Examples 1 and 3 are lauric acid, myristic acid, and palmitic acid (fatty acids with a carbon chain length of 15), and the fatty acids in Examples 2, 4-7 are lauric acid, myristic acid, and stearic acid (fatty acids with a carbon chain length of 18).

[0070] Comparative Examples 8-11

[0071] A facial cleanser, the formula of which is shown in Table 4 by weight percentage:

[0072] Table 4

[0073]

[0074] The manufacturer models of the components used in this embodiment and the comparative example are listed in Table 5:

[0075] Table 5

[0076]

[0077]

[0078] Performance Testing Methods

[0079] 1. Foam height: The foam height of the soap-based compositions of Examples 1-12 and Comparative Examples 1-7 was tested every 5 minutes in accordance with GB / T 13173-2008 Determination of Foaming Power of Detergents (Ross-Miles Method). The test results are shown in Tables 6 and 7.

[0080] 2. Foam liquid separation: The soap-based compositions of Examples 1-12 and Comparative Examples 1-7 were used to generate foam using a foamer. The bubbles were then weighed using an analytical balance and spread on a filter. The bubble liquid was absorbed on a paper towel, and the liquid separation weight was recorded. The weight of the foam liquid separation was converted into a liquid separation percentage. The test results are shown in Tables 8 and 9.

[0081] 3. Take 0.5 g of samples of Examples 13, 16, 17, 18 and Comparative Examples 8, 9, 10, 11 respectively, place them in the palm of your hand, measure about 10 ml of tap water and pour it into the palm of your hand, rub your hands together for 20 circles, wait for 60 seconds and take a picture of your hand. Figure 1 and Figure 2 shown.

[0082] 4. Select samples of Examples 13, 16, 17, 18 and Comparative Examples 8, 9, 10, and 11 for crowd trial evaluation: evaluate the products after using the facial cleanser. Score 1-5 points, 5 points represent very satisfied, 4 points are relatively satisfied, 3 points feel average, 2 points are not very satisfied, 1 point is very dissatisfied and unacceptable, and the test results are shown in Table 10.

[0083] Performance test data

[0084] Table 6

[0085]

[0086]

[0087] Table 7

[0088]

[0089] Table 8

[0090]

[0091] Table 9

[0092] Comparative Example 1 2 3 4 5 6 7 Foam separation percentage 85％ 84％ 80％ 77％ 93％ 97％ 45％

[0093] The performance test results show that the foams of Comparative Examples 1-6 have higher foaming ability, but higher foam liquid separation and unstable foams; the foam stability of Comparative Example 7 is higher, but the foaming ability is weaker.

[0094] Table 10

[0095]

[0096]

[0097] The comparative formula has good foam and mildness, and the skin feels averagely moisturized.

[0098] The main difference between Comparative Examples 1-4 is that they are slightly less mild, and the skin feels more dry and rough after washing.

Claims

1. A soap base composition with a foam stabilizing effect, characterized in that: include: Component A and component B, wherein component A includes fatty acid with a carbon chain length of 12-18, and component B includes alkali solution, and the mass ratio of component A to component B is (6-8):(2-4).

2. The soap base composition with foam stabilizing effect according to claim 1, characterized in that: The fatty acid comprises lauric acid and myristic acid, and the weight ratio of the lauric acid to the myristic acid is 1:(1-10).

3. The soap base composition with foam stabilizing effect according to claim 2, characterized in that: The fatty acid further includes a fatty acid with a carbon chain length of 15-18, and the fatty acid with a carbon chain length of 15-18 includes any one of palmitic acid and stearic acid.

4. The soap-based composition with foam stabilizing effect according to claim 3, characterized in that: The weight ratio of myristic acid, lauric acid and fatty acid with a carbon chain length of 15-18 is 1:(1-9):(1-6).

5. The soap-based composition with foam stabilizing effect according to claim 4, characterized in that: The weight ratio of myristic acid, lauric acid and fatty acid with a carbon chain length of 15-18 is 1:(1-7):(1-4).

6. A method for preparing a soap-based composition with a foam-stabilizing effect according to claim 1, characterized in that: The following steps are involved: S1, taking fatty acids, adding water respectively, heating and stirring in a water bath at 75-90°C to obtain fatty acid solutions; S2, preparing alkali solution; S3, adding the alkali solution to the fatty acid solution, keeping the temperature for reaction for 20-60 minutes, stirring and cooling to obtain a fatty acid salt solution; S4. Weigh the fatty acid salt according to the formula ratio, stir and mix evenly, defoam, and cool to room temperature.

7. A facial cleanser, characterized in that: The components include, by weight percentage: 30-70% of the soap composition described in any one of claims 1 to 5, 1-10% of a polyol, 5-30% of a surfactant composition, 1-7% of a thickener, and the balance is made up of water.

8. The facial cleanser according to claim 7, characterized in that The polyol includes at least one of PEG-8, PEG-32, PEG-6, dipropylene glycol, 1,3-propylene glycol, and glycerol.

9. The facial cleanser according to claim 8, characterized in that The surfactant composition comprises an amphoteric surfactant, a nonionic surfactant and a cationic surfactant.

10. The facial cleanser according to claim 9, characterized in that The thickener includes at least one of an acrylic acid ester copolymer and cellulose.

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