Skin care microcapsule, preparation method and application

Abstract

The present invention relates to the technical field of B01J13 / 00, and specifically to a skin-care microcapsule, a preparation method and an application. A skin-care microcapsule, wherein the raw materials for preparing the microcapsule include: a wall material and a core material; the raw materials for preparing the wall material, by weight, include 5-7.5 parts of melamine, 5-6.5 parts of urea, 20-30 parts of formaldehyde aqueous solution, and 20-30 parts of water; the raw materials for preparing the core material include an emulsifier and an essential oil; the essential oil is selected from horse oil, grape seed oil, coconut oil, argan oil, shea butter, jojoba oil, and camellia oil. The skin-care microcapsule prepared by the present invention can have excellent durability on fabrics and has good water washability.

Description

Technical Field

[0001] The present invention relates to the technical field of B01J13 / 00, and in particular to a skin-care microcapsule, a preparation method and an application thereof. Background Art

[0002] At present, in-situ polymerization is one of the most important methods in the preparation of microcapsules. It can be used to prepare a variety of high-quality microcapsules with special functions. The Chinese patent application number CN202010710563.5 discloses a method for preparing melamine phase change microcapsules with low formaldehyde content. Melamine and formaldehyde are used to prepare microcapsules, which solves the technical problem of large formaldehyde residues. However, the problem of how to improve the water washability of melamine and formaldehyde as raw materials for the preparation of wall materials has not been solved, and it will not be used in daily life.

[0003] Therefore, providing a microcapsule that has excellent durability, good water resistance, and long-term effective skin care effect on the skin is the main technical problem that needs to be solved at present. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a skin-care microcapsule, the preparation materials of which include: wall material and core material;

[0005] The raw materials for preparing the wall material include, by weight, 5-7.5 parts of melamine, 5-6.5 parts of urea, 20-30 parts of formaldehyde aqueous solution, and 20-30 parts of water;

[0006] The raw materials for preparing the core material include emulsifier and essential oil;

[0007] The essential oil is selected from horse oil, grape seed oil, coconut oil, argan oil, shea butter, jojoba oil and camellia oil.

[0008] Preferably, the essential oil consists of a combination of horse oil, grape seed oil and shea butter.

[0009] Furthermore, the weight ratio of the horse oil, grape seed oil and shea butter is 1:(0.5-2):(1-2).

[0010] The CAS number of the melamine is 108-78-1.

[0011] The CAS number of the urea is 57-13-6.

[0012] The mass concentration of formaldehyde in the formaldehyde aqueous solution is 37%.

[0013] Preferably, the method for preparing the wall material comprises the following steps:

[0014] The pH value of the melamine, urea and formaldehyde aqueous solution in water is adjusted to 7.5-9.0, and the mixture is stirred, heated and kept warm for a certain period of time. After the reaction is completed, the mixture is cooled to 30-50° C. and then the stirring is stopped to obtain the wall material.

[0015] Preferably, the heating rate is 0.5-3°C / min, and the insulation temperature is 65-75°C.

[0016] The inventors found in experiments that by stirring and heating the melamine, urea and formaldehyde aqueous solutions and keeping them warm for a certain period of time, the melamine, urea and formaldehyde aqueous solutions can be fully contacted, and the method of adding the melamine, urea and formaldehyde aqueous solutions in multiple times does not need to be adopted. In addition, compared with the heating temperature required for conventional heating, the heating and keeping temperatures in the present invention are lower. Heating to 65-75°C and keeping warm at this temperature can make the melamine, urea and formaldehyde aqueous solutions fully contact and react to obtain a wall material that can better wrap the core material.

[0017] Preferably, the raw materials for preparing the emulsifier include, by weight, 10-25 parts of styrene-maleic anhydride copolymer, 1-3 parts of sodium hydroxide, and 70-85 parts of water.

[0018] Preferably, the preparation method of the emulsifier comprises the following steps:

[0019] 10-25 parts of styrene-maleic anhydride copolymer, 1-3 parts of sodium hydroxide and 70-85 parts of water are mixed and heated to 80° C. until the solution is a transparent yellow liquid to obtain an emulsifier.

[0020] Preferably, the weight ratio of the emulsifier to horse oil is 1:(0.5-0.8).

[0021] The inventors found in experiments that when the weight ratio of the emulsifier to the essential oil is 1:(0.5-0.8), the prepared skin care microcapsules have good stability, especially when the essential oil is composed of a combination of horse oil, grape seed oil, and shea butter, and the weight ratio of the horse oil, grape seed oil, and shea butter is 1:(0.5-2):(1-2), they can be more easily wrapped by the wall material after being used in combination with the wall material to form skin care microcapsules with excellent stability; when the essential oil content is high, it will affect the stability of the skin care microcapsules, and the possible The reason is that horse oil contains linolenic acid and unsaturated fatty acids, and the unsaturated fatty acids in grape seed oil will have higher permeability at high temperatures, affecting the stability of the core material formed by the emulsifier and the essential oil being wrapped by the wall material. However, when the weight ratio of the current emulsifier and the essential oil is 1: (0.5-0.8), in the presence of sodium hydroxide and water, the styrene-maleic anhydride copolymer can interact with the functional groups contained in the essential oil, so that the styrene-maleic anhydride copolymer can maintain a stable interaction state with the essential oil and can be better wrapped by the wall material.

[0022] The second aspect of the present invention provides a method for preparing skin-care microcapsules, comprising the following steps:

[0023] S1, adding essential oil and emulsifier into a stirrer for stirring and emulsification to obtain a core material;

[0024] S2, slowly adding the wall material into the core material, and adding water to mix to obtain a mixed solution;

[0025] S3, adding citric acid solution into the mixed solution to adjust the pH value and stirring, heating and keeping warm for a certain period of time to obtain skin care microcapsules.

[0026] Preferably, the weight ratio of the wall material, core material and water is 1:(2.6-3):(1-1.5).

[0027] Furthermore, the weight ratio of the wall material, core material and water is 1:2.8:1.2.

[0028] Preferably, the stirring speed in S1 is 3000-7000 r / min, and the emulsification time is 5-30 min.

[0029] Preferably, the pH value in S3 is adjusted to 4-4.5, the stirring speed is 300-700 r / min, the insulation temperature is 65-75° C., and the insulation time is 80-150 min.

[0030] In order to improve the coverage rate of the emulsifier and the essential oil composed of the combination of horse oil, grape seed oil and shea butter as the core material by the wall material, the inventors found in the experiment that by adding citric acid solution to adjust the pH value of the mixed solution to 4-4.5, the stirring speed is 300-700r / min, the insulation temperature is 65-75°C, the insulation time is 80-150min, and the weight ratio of the wall material, the core material and the water is 1: (2.6-3): (1-1.5), especially when the weight ratio of the wall material, the core material and the water is 1: 2.8: 1.2, the coverage rate and stability of the emulsifier and the essential oil composed of the combination of horse oil, grape seed oil and shea butter as the core material by the wall material can be improved. The possible reason is that by controlling the pH value of the mixed solution, the stirring speed, the insulation time and the insulation time, the insulation time and the insulation time can be increased. The high temperature can improve the amount of polymers with a three-dimensional network structure formed by further dehydration and condensation of melamine-urea-formaldehyde resin prepolymers formed by dehydration and polycondensation of melamine, urea and formaldehyde in the mixed solution. The more polymers with a three-dimensional network structure are formed, the more networks that can be wrapped for emulsifiers and essential oils are provided. After emulsification, the coverage rate of the emulsifier and the essential oil composed of the combination of horse oil, grape seed oil and shea butter can be improved, and the stability of the skin care microcapsules can also be improved. However, when the pH value of the mixed solution is too high, it will affect the amount of polymers with a three-dimensional network structure formed by further dehydration and condensation of melamine-urea-formaldehyde resin prepolymers, thereby affecting the coverage rate of the emulsifier and the combination of horse oil, grape seed oil and shea butter.

[0031] The third aspect of the present invention provides a skin-care microcapsule for use in fabrics.

[0032] Preferably, the skin-care microcapsules are mixed with an adhesive and then applied as a finishing agent to fabrics.

[0033] An application of skin care microcapsules comprises the following steps:

[0034] (1) Mixing the skin-care microcapsules with an adhesive as a finishing agent;

[0035] (2) Add the finishing agent into the liquid tank of the setting machine, and pass the fabric through the liquid tank and rollers;

[0036] (3) Heat and dry the fabric.

[0037] Preferably, the binder is a self-crosslinking polymer.

[0038] Furthermore, the self-crosslinking polymer is a self-crosslinking polyether polyurethane.

[0039] Preferably, the viscosity of the self-crosslinking polyether polyurethane is 30-70 mPa.s.

[0040] The present invention does not limit the manufacturer of the self-crosslinking polyether polymer, and examples thereof include: the manufacturer is Tuona Chemical, the model is NANO PU is a self-crosslinking polyether polyurethane with a viscosity of 50mPa.s.

[0041] Preferably, the weight ratio of the skin-care microcapsules to the binder is 1:(0.5-1).

[0042] Preferably, the mass concentration of the finishing agent in the finishing liquid is 4-7%.

[0043] Preferably, the weight ratio of the finishing liquid to the fabric is (40-60):1.

[0044] Preferably, the fabric is cotton fiber textile fabric.

[0045] Preferably, the fabric is heated and dried at a temperature of 140-160° C., and the drying time is 40-60 seconds.

[0046] The inventors found that the use of skin-care microcapsules in combination with self-crosslinking polyether polyurethane can improve the excellent retention and durability of the skin-care microcapsules on cotton fiber textile fabrics and has good water wash resistance. The possible reason is that the self-crosslinking polyether polyurethane serves as a connecting bridge between the cotton fiber textile fabrics and the skin-care microcapsules. The self-crosslinking polyether polyurethane forms a certain interaction with the skin-care microcapsules and forms a certain film layer on the surface of the skin-care microcapsules. At the same time, the self-crosslinking polyether polyurethane can penetrate into the interior of the cotton fiber textile fabric, and form an entangled structure with the cotton fibers, thereby increasing the firmness of the microcapsules in the cotton fiber textile fabric. When used, the encapsulated horse oil can be slowly released, thereby increasing the contact time between the horse oil and the skin, and having an effective skin care effect on the skin.

[0047] Beneficial Effects

[0048] In the present invention, the weight ratio of the emulsifier to the horse oil is limited to prepare skin-care microcapsules with good stability.

[0049] In the present invention, the pH value of the mixed solution, the stirring speed, the temperature of heating and the insulation time are adjusted to improve the coverage rate of the emulsifier and the horse oil, and also improve the stability of the skin-care microcapsules.

[0050] The skin-care microcapsules prepared by the present invention can have excellent durability on fabrics and good water-washing resistance.

[0051] By adding an adhesive to the present invention, the adhesive is mixed with the skin-care microcapsules and then used as a water-resistant microcapsule product to increase the water-resistant properties of the microcapsules. The possible reason is that after the adhesive forms a certain film on the surface of the skin-care microcapsules, the durability of the skin-care microcapsules in the fabric is increased.

[0052] The present invention increases the firmness of the microcapsules in the fabric by coating the microcapsules and entangled with the fibers. When used, the horse oil wrapped in the skin-care microcapsules can be slowly released, thereby increasing the contact time between the horse oil and the skin, and achieving a long-term and effective skin care effect on the skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a microscopic picture of the skin care microcapsules prepared in Example 1 taken using an electron microscope.

[0054] Figure 2 This is a graph showing the test results of using GC-MS to test the horse oil content in cotton fiber textile fabrics after applying the skin-care microcapsules prepared in Example 1 to the treated fabrics.

[0055] Figure 3 The skin-care microcapsules prepared in Example 1 were applied to cotton fiber textile fabrics to obtain the treated fabrics, and the test spectrum of horse oil in the fabrics was tested by GC-MS after the treatment.

[0056] Figure 4 This is the test spectrum of horse oil standard after processing.

[0057] Figure 5 This is a microscopic photograph of the treated fabric obtained in Example 1 taken using an electron microscope after washing 5 times. DETAILED DESCRIPTION

[0058] Example 1

[0059] A skin-care microcapsule, the preparation materials of which include: wall material and core material;

[0060] The raw materials for preparing the wall material include, by weight, 6.7 parts of melamine, 5.5 parts of urea, 26 parts of formaldehyde aqueous solution, and 25 parts of water;

[0061] The raw materials for preparing the core material include emulsifier and essential oil;

[0062] The essential oil is a composition of horse oil, grape seed oil and shea butter, and the weight ratio of the horse oil, grape seed oil and shea butter is 1:1:1.5.

[0063] The horse oil was purchased from Shanghai Binyou New Material Technology Co., Ltd.

[0064] The grape seed oil essential oil was purchased from Shaanxi Tianzhicheng Biotechnology Co., Ltd.

[0065] The shea butter was purchased from Jiangxi Jingwang Natural Flavors Co., Ltd.

[0066] The CAS number of the melamine is 108-78-1.

[0067] The CAS number of the urea is 57-13-6.

[0068] The mass concentration of formaldehyde in the formaldehyde aqueous solution is 37%.

[0069] The method for preparing the wall material comprises the following steps:

[0070] The pH value of the melamine, urea and formaldehyde aqueous solution in water is adjusted to 8.5 using a 30% NaOH aqueous solution, and the mixture is heated with stirring and kept warm for a certain period of time. After the reaction is completed, the mixture is cooled to 40° C. and then the stirring is stopped to obtain the wall material.

[0071] The heating rate is 1°C / min, the insulation temperature is 70°C, and the insulation time is 1h.

[0072] The raw materials for preparing the emulsifier include, by weight, 20 parts of styrene-maleic anhydride copolymer, 2 parts of sodium hydroxide, and 78 parts of water.

[0073] The preparation method of the emulsifier comprises the following steps:

[0074] 20 parts of styrene-maleic anhydride copolymer, 2 parts of sodium hydroxide and 78 parts of water were mixed and heated to 80° C. until the solution was a transparent yellow liquid to obtain an emulsifier.

[0075] The weight ratio of the emulsifier to horse oil is 1:0.65.

[0076] The second aspect of this embodiment provides a method for preparing skin-care microcapsules, comprising the following steps:

[0077] S1, adding essential oil and emulsifier into a stirrer for stirring and emulsification to obtain a core material;

[0078] S2, slowly adding the wall material into the core material, and adding water to mix to obtain a mixed solution;

[0079] S3, adding citric acid solution into the mixed solution to adjust pH, stirring, heating and keeping warm for a certain period of time to obtain skin care microcapsules.

[0080] The weight ratio of the wall material, the core material and water is 1:3:1.05.

[0081] The core material is added in an amount of 150 parts by weight.

[0082] The stirring speed in S1 is 5500 r / min, and the emulsification time is 20 min.

[0083] In the S3, the pH value is adjusted to 4, the stirring speed is 550 r / min, the insulation temperature is 70° C., and the insulation time is 110 min.

[0084] The third aspect of this embodiment provides a skin care microcapsule for use in fabrics.

[0085] The application of the skin care type microcapsule comprises the following steps:

[0086] (1) Mixing the skin-care microcapsules with an adhesive as a finishing agent;

[0087] (2) Add the finishing agent into the liquid tank of the setting machine and mix it with water to form a finishing liquid, and immerse the fabric in the liquid tank for 2 minutes and roll it;

[0088] (3) Heat and dry the fabric.

[0089] The adhesive is a self-crosslinking polyether polymer; the self-crosslinking polymer is a self-crosslinking polyether polyurethane.

[0090] The self-crosslinking polyether polyurethane was purchased from Tuona Chemical, model number is NANO PU.

[0091] The weight ratio of the skin-care microcapsules to the binder is 1:0.8.

[0092] The mass concentration of the finishing agent in the finishing liquid is 5%.

[0093] The weight ratio of the finishing liquid to the fabric is 50:1.

[0094] The fabric is a cotton fiber textile fabric.

[0095] The fabric is heated and dried at a temperature of 150° C. for 50 seconds.

[0096] Example 2

[0097] A skin-care microcapsule, the preparation materials of which include: wall material and core material;

[0098] The raw materials for preparing the wall material include, by weight, 7.5 parts of melamine, 6.5 parts of urea, 30 parts of formaldehyde aqueous solution, and 30 parts of water;

[0099] The raw materials for preparing the core material include emulsifier and essential oil;

[0100] The essential oil is a composition of horse oil, grape seed oil and shea butter, and the weight ratio of the horse oil, grape seed oil and shea butter is 1:1:1.5.

[0101] The horse oil was purchased from Shanghai Binyou New Material Technology Co., Ltd.

[0102] The grape seed oil essential oil was purchased from Shaanxi Tianzhicheng Biotechnology Co., Ltd.

[0103] The shea butter was purchased from Jiangxi Jingwang Natural Flavors Co., Ltd.

[0104] The CAS number of the melamine is 108-78-1.

[0105] The CAS number of the urea is 57-13-6.

[0106] The mass concentration of formaldehyde in the formaldehyde aqueous solution is 37%.

[0107] The method for preparing the wall material comprises the following steps:

[0108] The pH value of the melamine, urea and formaldehyde aqueous solution in water is adjusted to 9 using a 30% mass concentration NaOH aqueous solution, and the mixture is heated with stirring and kept warm for a certain period of time. After the reaction is completed, the mixture is cooled to 50° C. and then the stirring is stopped to obtain the wall material.

[0109] The heating rate is 3°C / min, the insulation temperature is 75°C, and the insulation time is 2h.

[0110] The raw materials for preparing the emulsifier include, by weight, 25 parts of styrene-maleic anhydride copolymer, 3 parts of sodium hydroxide, and 85 parts of water.

[0111] The weight ratio of the emulsifier to horse oil is 1:0.8.

[0112] The preparation method of the emulsifier comprises the following steps:

[0113] 25 parts of styrene-maleic anhydride copolymer, 3 parts of sodium hydroxide and 85 parts of water were mixed and heated to 80° C. until the solution was a transparent yellow liquid to obtain an emulsifier.

[0114] The second aspect of this embodiment provides a method for preparing skin-care microcapsules, comprising the following steps:

[0115] S1, adding essential oil and emulsifier into a stirrer for stirring and emulsification to obtain a core material;

[0116] S2, slowly adding the wall material into the core material, and adding water to mix to obtain a mixed solution;

[0117] S3, adding citric acid solution into the mixed solution to adjust pH, stirring, heating and keeping warm for a certain period of time to obtain skin care microcapsules.

[0118] The weight ratio of the wall material, the core material and water is 1:2.6:1.2.

[0119] The core material is added in an amount of 150 parts by weight.

[0120] The stirring speed in S1 is 7000 r / min, and the emulsification time is 10 min.

[0121] In the S3, the pH value is adjusted to 4.5, the stirring speed is 700 r / min, the insulation temperature is 75° C., and the insulation time is 150 min.

[0122] The third aspect of this embodiment provides a skin care microcapsule for use in fabrics.

[0123] The application of the skin care type microcapsule comprises the following steps:

[0124] (1) Mixing the skin-care microcapsules with an adhesive as a finishing agent;

[0125] (2) Add the finishing agent into the liquid tank of the setting machine and mix it with water to form a finishing liquid, and immerse the fabric in the liquid tank for 2 minutes and roll it;

[0126] (3) Heat and dry the fabric.

[0127] The adhesive is a self-crosslinking polyether polymer; the self-crosslinking polymer is a self-crosslinking polyether polyurethane.

[0128] The self-crosslinking polyether polyurethane was purchased from Tuona Chemical, model number is NANO PU.

[0129] The weight ratio of the skin-care microcapsules to the binder is 1:1.

[0130] The mass concentration of the finishing agent in the finishing liquid is 7%.

[0131] The weight ratio of the finishing liquid to the fabric is 50:1.

[0132] The fabric is a cotton fiber textile fabric.

[0133] The fabric is heated and dried at a temperature of 150° C. for 50 seconds.

[0134] Example 3

[0135] A skin-care microcapsule, the preparation materials of which include: wall material and core material;

[0136] The raw materials for preparing the wall material include, by weight, 5.5 parts of melamine, 5 parts of urea, 20 parts of formaldehyde solution, and 20 parts of water;

[0137] The raw materials for preparing the core material include emulsifier and essential oil;

[0138] The essential oil is a composition of horse oil, grape seed oil and shea butter, and the weight ratio of the horse oil, grape seed oil and shea butter is 1:1:1.5.

[0139] The horse oil was purchased from Shanghai Binyou New Material Technology Co., Ltd.

[0140] The grape seed oil essential oil was purchased from Shaanxi Tianzhicheng Biotechnology Co., Ltd.

[0141] The shea butter was purchased from Jiangxi Jingwang Natural Flavors Co., Ltd.

[0142] The CAS number of the melamine is 108-78-1.

[0143] The CAS number of the urea is 57-13-6.

[0144] The mass concentration of formaldehyde in the formaldehyde aqueous solution is 37%.

[0145] The method for preparing the wall material comprises the following steps:

[0146] The pH value of the melamine, urea and formaldehyde aqueous solution in water is adjusted to 8 using a 30% NaOH aqueous solution, and the mixture is heated with stirring and kept warm for a certain period of time. After the reaction is completed, the mixture is cooled to 35° C. and then the stirring is stopped to obtain the wall material.

[0147] The heating rate is 0.5°C / min, the insulation temperature is 65°C, and the insulation time is 2h.

[0148] The raw materials for preparing the emulsifier include, by weight, 15 parts of styrene-maleic anhydride copolymer, 1.5 parts of sodium hydroxide, and 70 parts of water.

[0149] 15 parts of styrene-maleic anhydride copolymer, 1.5 parts of sodium hydroxide and 70 parts of water were mixed and heated to 80° C. until the solution was a transparent yellow liquid to obtain an emulsifier.

[0150] The weight ratio of the emulsifier to horse oil is 1:0.5.

[0151] The second aspect of this embodiment provides a method for preparing skin-care microcapsules, comprising the following steps:

[0152] S1, adding essential oil and emulsifier into a stirrer for stirring and emulsification to obtain a core material;

[0153] S2, slowly adding the wall material into the core material, and adding water to mix to obtain a mixed solution;

[0154] S3, adding citric acid solution into the mixed solution to adjust pH, stirring, heating and keeping warm for a certain period of time to obtain skin care microcapsules.

[0155] The weight ratio of the wall material, the core material and water is 1:2.6:1.2.

[0156] The core material is added in an amount of 120 parts by weight.

[0157] The stirring speed in S1 is 7000 r / min, and the emulsification time is 10 min.

[0158] In the S3, the pH value is adjusted to 4.5, the stirring speed is 700 r / min, the insulation temperature is 75° C., and the insulation time is 150 min.

[0159] The third aspect of this embodiment provides a skin care microcapsule for use in fabrics.

[0160] The application of the skin care type microcapsule comprises the following steps:

[0161] (1) Mixing the skin-care microcapsules with an adhesive as a finishing agent;

[0162] (2) Add the finishing agent into the liquid tank of the setting machine and mix it with water to form a finishing liquid, and immerse the fabric in the liquid tank for 2 minutes and roll it;

[0163] (3) Heat and dry the fabric.

[0164] The adhesive is a self-crosslinking polyether polymer; the self-crosslinking polymer is a self-crosslinking polyether polyurethane.

[0165] The self-crosslinking polyether polyurethane was purchased from Tuona Chemical, model number is NANO PU.

[0166] The weight ratio of the skin-care microcapsules to the binder is 1:0.5.

[0167] The mass concentration of the finishing agent in the finishing liquid is 4%.

[0168] The weight ratio of the finishing liquid to the fabric is 50:1.

[0169] The fabric is a cotton fiber textile fabric.

[0170] The fabric is heated and dried at a temperature of 150° C. for 50 seconds.

[0171] Example 4

[0172] Example 4 provides a technical solution for skin-care microcapsules, preparation methods and applications. The difference from Example 1 is that in the preparation method of skin-care microcapsules, the pH value is adjusted to 5.5 in S3 and the insulation temperature is 80°C.

[0173] Example 5

[0174] Example 5 provides a technical solution for skin care microcapsules, preparation methods and applications, which is different from Example 1 in that the weight ratio of the emulsifier to the horse oil is 1:1.

[0175] Example 6

[0176] Example 6 provides a technical solution for skin-care microcapsules, preparation methods and applications. The difference from Example 1 is that the adhesive is a self-cross-linking acrylic latex, the annual viscosity of the self-cross-linking acrylic latex is 60 mPa.s, and the manufacturer is Glade New Materials Technology (Zhongshan) Co., Ltd.

[0177] Performance Testing

[0178] 1. Stability test

[0179] The skin care microcapsules prepared in Examples 1-6 were placed at 60° C. for 72 hours, and the existence state of the skin care microcapsules was observed to see whether turbidity or precipitation occurred. Those without turbidity or precipitation were recorded as Grade A, those with turbidity and no precipitation were recorded as Grade B, and those with turbidity and precipitation were recorded as Grade C. The test results are shown in Table 1.

[0180] 2. Size test

[0181] The skin-care microcapsules prepared in Example 1 were photographed using an electron microscope. Figure 1 .

[0182] The treated fabric obtained in Example 1 was photographed microscopically using an electron microscope. Figure 5 .

[0183] 3. Test of horse oil content in fabrics

[0184] The skin-care microcapsules prepared in Example 1 were applied to cotton fiber textile fabrics to obtain treated fabrics. The horse oil content in the fabrics was tested by GC-MS. The test results are shown in Figure 2-4 .

[0185] Said Figure 3 The test spectrum of the treated fabric obtained by applying the skin-care microcapsules prepared in Example 1 to cotton fiber textile fabrics is a qualitative test of horse oil in the fabrics tested by GC-MS after the treatment; Figure 4 This is the test spectrum of horse oil standard after processing. Figure 4 It can be seen that after the horse oil standard was processed by GC-MS, different ion fragments were obtained, and the ion fragments appeared in the range of 19-23. Figure 3 It can be seen that after the horse oil in the extracted fabric is processed by GC-MS, the ion fragments obtained also appear in the range of 19-23, and the corresponding relationship between the peak shape and peak intensity is the same as Figure 4 The corresponding relationship of the test results obtained is the same, so it can be seen that the fabric contains a certain amount of horse oil, and quantitative testing through GC-MS shows that the content of horse oil in the fabric is 2174 mg / kg.

[0186] 4. Washability test

[0187] The skin care microcapsules prepared in Examples 1-6 were applied to cotton fiber textile fabrics to obtain treated fabrics, which were washed once a week for 30 minutes. After washing 5 times, the change rate of the horse oil content in the fabrics before and after washing was tested. The change rate of horse oil content less than 20% was recorded as Grade A, the change rate of horse oil content greater than 20% and less than or equal to 30% was recorded as Grade B, the change rate of horse oil content greater than 30% and less than or equal to 40% was recorded as Grade C, and the change rate of horse oil content greater than 40% was recorded as Grade D. The test results are shown in Table 1.

[0188] Table 1

[0189] Example stability Washing resistance Example 1 A A Example 2 A A Example 3 A A Example 4 C C Example 5 B B Example 6 A D

Claims

1. An application of skin care microcapsules, characterized in that: The skin-care microcapsules are mixed with a binder and then used as a finishing agent in fabrics; the weight ratio of the skin-care microcapsules to the binder is 1:(0.5-1); The adhesive is a self-crosslinking polyether polyurethane; the viscosity of the self-crosslinking polyether polyurethane is 30-70mPa.s; The raw materials for preparing the skin-care microcapsules include wall materials and core materials; The raw materials for preparing the wall material include, by weight, 5-7.5 parts of melamine, 5-6.5 parts of urea, 20-30 parts of formaldehyde aqueous solution, and 20-30 parts of water; The raw materials for preparing the core material include emulsifier and essential oil; The method for preparing the wall material comprises the following steps: The pH value of the melamine, urea and formaldehyde aqueous solution in water is adjusted to 7.5-9.0, and the mixture is heated and kept warm for a certain period of time by stirring. After the reaction is completed, the mixture is cooled to 30-50° C. and then the stirring is stopped to obtain the wall material; The heating rate is 0.5-3°C / min, and the insulation temperature is 65-75°C; The essential oil is composed of a combination of horse oil, grape seed oil and shea butter; The weight ratio of horse oil, grape seed oil and shea butter is 1:(0.5-2):(1-2); The weight ratio of the emulsifier to horse oil is 1:(0.5-0.8); The preparation method of the emulsifier comprises the following steps: mixing 10-25 parts of styrene-maleic anhydride copolymer, 1-3 parts of sodium hydroxide and 70-85 parts of water and heating to 80° C. until the solution is a transparent yellow liquid to obtain the emulsifier; The preparation method of the skin-care microcapsule comprises the following steps: S1, adding essential oil and emulsifier into a stirrer for stirring and emulsification to obtain a core material; S2, slowly adding the wall material into the core material, and adding water to mix to obtain a mixed solution; S3, adding citric acid solution to the mixed solution to adjust the pH and stirring, heating, and keeping warm for a certain period of time to obtain skin care microcapsules; The pH value of S3 is adjusted to 4-4.

5.

2. The use of the skin care microcapsule according to claim 1, characterized in that: The raw materials for preparing the emulsifier include, by weight, 10-25 parts of styrene-maleic anhydride copolymer, 1-3 parts of sodium hydroxide, and 70-85 parts of water.

3. The use of the skin care microcapsules as claimed in claim 1, characterized in that: The stirring speed in S1 is 3000-7000 r / min, and the emulsification time is 5-30 min.

4. The use of the skin care microcapsule as claimed in claim 1, characterized in that: In the S3, the pH value is adjusted to 4-4.5, the stirring speed is 300-700 r / min, the insulation temperature is 65-75° C., and the insulation time is 80-150 min.

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