CN115387128A - Skin-care moisture-retention finishing agent based on two-phase microcapsules - Google Patents
Skin-care moisture-retention finishing agent based on two-phase microcapsules Download PDFInfo
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
- D06M23/12—Processes in which the treating agent is incorporated in microcapsules
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/03—Polysaccharides or derivatives thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/15—Proteins or derivatives thereof
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
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Abstract
The invention discloses a skin-care moisturizing finishing agent based on a two-phase microcapsule, which is prepared from 5-15% of skin-care moisturizing microcapsule slurry, 2-6% of adhesive, 0.25-0.75% of cross-linking agent, 1-5% of softening agent and the balance of water according to percentage. The skin-care moisturizing finishing agent based on the two-phase microcapsule adopts a shell to encapsulate the microcapsules of an oil-soluble water-locking component and a water-soluble water-absorbing component, firstly, a double emulsion is formed, a wall material component in an oil phase generates a high polymer through in-situ polymerization reaction and is precipitated and deposited on oil-water interfaces of an external water phase and an oil phase, and the oil phase and an internal water phase, an interface film with certain mechanical strength is formed to encapsulate an active component, and through external forces such as friction and the like, the slow and lasting release of various skin-care moisturizing components can be realized, so that a fabric can adapt to the change of environmental conditions and keep a skin-friendly and comfortable state for a long time.
Description
Technical Field
The invention relates to the technical field of textile auxiliaries, in particular to a skin-care and moisture-retention finishing agent based on a two-phase microcapsule.
Background
The pursuit of functional fabrics has become a fashion. Skin care is a long-standing topic. The skin care finishing of the fabric can endow the fabric with the effects of moistening, conditioning, moisturizing and the like cosmetics, and the fabric can be processed by spinning addition, chemical reaction, after finishing and the like. The post-finishing mode is used by wide fabric production merchants because the mechanical strength of the fibril can not be changed, the cost is low, the process is simple, the active ingredients are not damaged, and the like. However, skin care actives often contain a large portion of water soluble ingredients such as vitamins, amino acids, collagen peptides, and the like, which can easily cause the loss of the active during after-finishing and consumer use, thereby causing the rapid deterioration of the skin care function of the fabric. While oily components such as plant extracts, squalane and squalene, etc., are generally not suitable for direct application to fabrics. Therefore, how to avoid the loss of active substances, improve the washing times of functional fabrics and better utilize skin care active substances to improve the skin-friendly comfort of the fabrics is a key problem in the field. The microcapsule technology is an effective technical means for solving the above problems because of its encapsulation and sustained release effects. Most of the microcapsules on the market are in a form of encapsulating a single phase in a single shell, so that the application of different phases playing different roles in the same product is limited. The skin care and moisture retention needs to play a role in water repellency and drainage or water sealing and locking in the environment through an oily hydrophobic component on the one hand, and needs to play a role in water absorption and moisture retention in the environment through a hydrophilic component on the other hand, and the two aspects jointly play a role in maintaining a comfortable state which is not dry but not too wet, so that the simultaneous application of functional active ingredients in different phases in the same system is difficult to avoid.
Chinese patent (publication No. CN 107938367A) discloses a moisture-absorbing and sweat-releasing microcapsule finishing agent, which adopts a single shell to encapsulate a single oil phase to prepare microcapsules, and takes a hydrophilic component as a wall material; although various skin-care moisturizing ingredients can be simultaneously applied in the design, the structure of the active substance is difficult to ensure that the active substance is not changed during crosslinking and curing, and the hydrophilic active substance is directly contacted with a washing medium in the washing process, so that the mechanical loss or loss of the hydrophilic active substance is easily caused.
Another chinese patent (publication No. CN 113693997A) discloses a composition and a microcapsule with moisturizing and repairing effects, which is prepared by encapsulating a single oil phase with a single shell, and only using an oily hydrophobic functional component, wherein the moisturizing principle only relates to water repellency and drainage or closed water locking in the environment, and does not relate to water absorption and moisturizing in the environment at the same time.
Based on the above, the invention aims to provide a fabric skin-care and moisture-retention finishing agent and a preparation method thereof by using double-phase microcapsules based on double emulsions, which can greatly improve the washing resistance times of fabrics subjected to dipping, padding, printing or spraying treatment due to active matters encapsulated in a shell, and can also play a slow-release role due to different phase components encapsulated in the same microcapsule, thereby ensuring comprehensive and lasting excellent skin-care and moisture-retention functions of the fabrics.
Disclosure of Invention
The invention aims to provide a skin-care and moisture-retention finishing agent based on a two-phase microcapsule, which solves the problems of the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the skin-care and moisture-retention finishing agent is prepared from 5-15% of skin-care and moisture-retention microcapsule slurry, 2-6% of adhesive, 0.25-0.75% of cross-linking agent, 1-5% of softening agent and the balance of water according to the percentage.
Preferably, the binder is at least one selected from the group consisting of, but not limited to, polyacrylates, polyurethanes, vinyl acetates, butadiene copolymers, and silyl polymers.
The crosslinking agent includes, but is not limited to, at least one of polycarboxylic acids, epoxy compounds, chitosan compounds, polyurethane compounds, and silicone compounds.
The softening agent is at least one of hydroxyl silicone oil, dimethyl silicone oil and amino, epoxy, polyether, polyurethane and polyether block amino modified silicone oil.
The invention provides another technical scheme, which is a two-phase microcapsule, comprising an inner water phase, at least one inner shell, at least one oil phase and an outer shell.
Preferably, the particle size of the biphasic microcapsules is in the range of 0-80 μm.
Preferably, the internal aqueous phase is a mixture of water-soluble active ingredients, gelatin and water, and the water-soluble active ingredients include, but are not limited to, at least one of hyaluronic acid and salts thereof, collagen and enzymatic hydrolysate thereof, vitamin B, vitamin C, silk fibroin and enzymatic hydrolysate thereof, chitosan, glycerol, sodium lactate, sodium pyrrolidone carboxylate, chondroitin sulfate and sorbitol.
The gelatin is an internal water phase stabilizer.
The weight ratio of the water-soluble active ingredient, the gelatin and the water in the inner water phase is 1-30.
The inner shell is a fully synthetic high molecular polymer.
The oil phase includes but is not limited to at least one of squalene, squalane, vaseline, aloe essential oil, jojoba oil, shea butter, vitamin A, vitamin D, fatty acid glyceride, undecylenic acid monoglyceride, and lecithin.
The shell is a fully synthetic high molecular polymer.
The invention provides another technical scheme that a preparation method of a skin-care and moisture-retention finishing agent based on a two-phase microcapsule comprises the following steps:
the method comprises the following steps: mixing and dissolving the water-soluble active ingredients, the gelatin and the water according to the weight ratio to obtain an inner water phase;
step two: adding a first emulsifier and a wall material component into the oil phase until the first emulsifier and the wall material component are completely dissolved to obtain an oil phase mixture; wherein the weight ratio of the first emulsifier, the wall material component and the oil phase is 1-5;
step three: adding the oil-phase mixture in the step two into the internal water phase in the step one, firstly carrying out primary emulsification by using low-shear equipment, and then carrying out high-energy emulsification by using a high-pressure homogenizer to form W/O type primary emulsion, wherein the particle size of droplets of the primary emulsion is controlled to be 0-5 μm, preferably 0-2.5 μm, and most preferably 0-1 μm; the weight ratio of the oil phase mixture to the internal aqueous phase is 10;
step four: adding a second emulsifier into water until the second emulsifier is completely dissolved to obtain an external water phase; wherein the weight ratio of the second emulsifier to water is from 0.1 to 100, preferably from 0.5 to 3, most preferably from 1 to 2;
step five: mixing the external aqueous phase in the fourth step with the primary emulsion in the third step, and performing secondary emulsification by using low-shear equipment to form W/O/W type double emulsion, wherein the particle size of liquid drops of the double emulsion is controlled to be 0-80 μm, preferably 5-30 μm, most preferably 10-20 μm, and the weight ratio of the external aqueous phase to the primary emulsion is 1-2;
step six: slowly heating the obtained double emulsion to 80-90 ℃ under the condition of uniform stirring, preserving heat for 3-5h, and cooling to room temperature to obtain the slurry containing the two-phase skin-care and moisture-retention microcapsule.
Preferably, the first emulsifier in the second step is a surfactant with HLB value less than or equal to 8, including but not limited to at least one of polyoxyethylene sorbitol oleate, sorbitan fatty acid ester, glycerol mono/di-laurate, N-dimethylcaproamide, polyglycerol fatty acid ester, calcium alkyl benzene sulfonate and nonylphenoxy polyethoxyethanol.
The wall material component in the second step is an oil-soluble component, including but not limited to at least one of methyl methacrylate, isocyanate, polyaspartic acid ester, urethane, polyether polyol, polyester polyol, carbonate, epoxy resin, styrene and copolymer thereof, vinyl ether, siloxane, amide compound, azo compound and peroxide initiator.
Preferably, the second emulsifier in the fourth step is at least one of an anionic emulsifier, a cationic emulsifier, an amphoteric emulsifier and a nonionic emulsifier, and preferably the anionic emulsifier and the nonionic emulsifier are used in combination.
The anionic emulsifier includes, but is not limited to, at least one of linear alkylbenzene sulfonate, sodium branched alkylbenzene sulfonate, fatty alcohol polyoxyethylene ether sulfate, a-sulfo fatty acid ester salt, sulfonate of fatty acid methyl ester ethoxylate, fatty alcohol ether carboxylate, a-alkenyl sulfonate, dodecyl sulfonate, secondary alkyl sulfonate, sodium salt of styrene-maleic anhydride copolymer, lauryl ether sulfonate, and lignosulfonate.
The cationic emulsifier includes, but is not limited to, at least one of seleonium chloride, benzalkonium chloride, quaternary ammonium compounds, and amine compounds.
The amphoteric emulsifier includes, but is not limited to, at least one of amino acids, betaines, and imidazolines.
The non-ionic emulsifier comprises at least one of fatty alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, alkyl glycoside, fatty acid alkanolamide, alkylamine oxide, cocoamidol polyoxyethylene ether, alkylphenol polyoxyethylene ether, styryl phenol polyoxyethylene ether, alkylphenol formaldehyde resin polyoxyethylene ether, tristyrylphenol polyoxyethylene polyoxypropylene ether, polyethylene glycol, polyoxyethylene sorbitan fatty acid ester and polyvinylpyrrolidone.
Compared with the prior art, the invention has the beneficial effects that:
1. the skin-care moisturizing finishing agent based on the two-phase microcapsule adopts a shell to encapsulate the microcapsule of an oil-soluble water-locking component and a water-soluble water-absorbing component, firstly, a double emulsion is formed, a wall material component in an oil phase generates a high polymer through in-situ polymerization reaction and is precipitated and deposited on oil-water interfaces of an external water phase and an oil phase, and the oil phase and an internal water phase, an interface film with certain mechanical strength is formed to encapsulate an active component, and through external forces such as friction and the like, the slow and lasting release of various skin-care moisturizing components can be realized, so that a fabric can keep a skin-friendly and comfortable state for a long time;
2. the two-phase microcapsule can be firmly adhered to the fabric through the combined action of the adhesive and the cross-linking agent, and achieves more excellent washing times.
Drawings
FIG. 1 is a schematic representation of a two-phase microcapsule of the present invention comprising multiple inner shells.
In the figure: 1. an internal aqueous phase; 2. an inner shell; 3. an oil phase; 4. a housing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Preparing skin-care moisturizing microcapsules:
the method comprises the following steps: 4.5g of sodium hyaluronate and 1.3g of gelatin were added to 61.05g of water and dissolved by stirring to obtain an inner aqueous phase.
Step two: adding 2g of sorbitan fatty acid ester, 8g of isophorone diisocyanate and 16g of polyaspartic acid ester into 74g of squalane, and stirring to dissolve to obtain an oil phase mixture.
Step three: and (3) adding the oil-phase mixture in the step two into the internal water phase in the step one, primarily emulsifying by using low-shear equipment, and then performing high-energy emulsification by using a high-pressure homogenizer to form W/O type primary emulsion, wherein the D50 particle size of droplets of the primary emulsion is controlled to be 0.8 mu m.
Step four: 1.6g of sodium linear alkyl benzene sulfonate and 3.4g of polyoxyethylene sorbitan fatty acid ester were added to 245g of water and dissolved by stirring to obtain an external aqueous phase.
Step five: mixing the water phase of the middle and outer parts of the step four with the primary emulsion of the step three, and carrying out secondary emulsification by using low-shear equipment to form W/O/W type double emulsion, wherein the D50 particle size of the double emulsion drop is controlled to be 13 mu m.
Step six: slowly heating the obtained double emulsions to 90 ℃ under the condition of uniform stirring, preserving heat for 3 hours, and then cooling to room temperature to obtain the slurry 1 containing the skin-care and moisture-preservation microcapsules based on the double-phase emulsion.
Preparing a fabric skin-care moisture-retention finishing agent:
the components are uniformly mixed according to the formula shown in the table 1 to obtain the composition.
TABLE 1
Fabric after finishing:
respectively taking pure cotton fabric, carrying out one-dipping-one-rolling on the finishing agent A and the finishing agent B in the table 1, wherein the dipping-rolling temperature is room temperature, the pressure is 0.2MPa, the rolling residual rate is 100%, finally carrying out drying and shaping at 110 ℃, and numbering the finished cloth samples as a and B respectively; and respectively sampling the a and the b, washing for 20 times according to the national standard GB/T14575-2009 comprehensive color fastness of textile color fastness test, and respectively numbering the washed samples as a1 and b1.
Example two
Preparing skin-care moisturizing microcapsules:
the method comprises the following steps: adding 5g collagen peptide (molecular weight less than or equal to 2000 daltons) and 1g gelatin into 44g water, stirring and dissolving to obtain inner water phase.
Step two: adding polyoxyethylene sorbitol oleate 1.5g, styrene 4.2g, methyl methacrylate 15.8g and benzoyl peroxide 0.5g into shea butter 78g, stirring and dissolving to obtain oil phase mixture.
Step three: and (3) adding the oil-phase mixture in the step two into the internal water phase in the step one, firstly carrying out primary emulsification by using low-shear equipment, and then carrying out high-energy emulsification by using a high-pressure homogenizer to form W/O type primary emulsion, wherein the D50 particle size of droplets of the primary emulsion is controlled to be 0.5 mu m.
Step four: 1.8g of sodium fatty alcohol-polyoxyethylene ether sulfate and 3g of polyvinylpyrrolidone are added into 260g of water, stirred and dissolved to form an external water phase.
Step five: mixing the water phase of the middle part and the outer part of the step four with the primary emulsion of the step three, and carrying out secondary emulsification by using low-shear equipment to form W/O/W type double emulsion, wherein the D50 particle size of the double emulsion drops is controlled to be 16 mu m.
Step six: and slowly heating the obtained double emulsion to 90 ℃ under the condition of uniform stirring, preserving heat for 4 hours, and then cooling to room temperature to obtain the slurry 2 containing the skin-care and moisture-preservation microcapsule based on the double-phase emulsion.
Preparing a fabric skin-care moisture-retention finishing agent:
the components are uniformly mixed according to the formula shown in the table 2 to obtain the composition.
TABLE 2
Fabric after finishing:
respectively taking pure cotton fabric, carrying out one-dipping-one-rolling on the pure cotton fabric by using a finishing agent C and a finishing agent D in table 2, wherein the dipping-rolling temperature is room temperature, the pressure is 0.2MPa, the rolling residual rate is 100%, finally carrying out drying and shaping at 110 ℃, and numbering finished cloth samples as C and D respectively; and respectively sampling c and d, washing for 20 times according to the national standard GB/T14575-2009 comprehensive color fastness of textile color fastness test, and respectively numbering the washed samples as c1 and d1.
Effect test example 1 (moisture retention test):
each of the 4 test cloth samples of examples 1-2 was cut out to an appropriate size, and a blank cloth sample not treated with the skin and moisture absorbent finishing agent of the present invention was also cut out as a blank control 1, and then manually kneaded to break the microcapsules, and dried at 105 ℃ until the weight of the fabric is constant, wherein the weight of the fabric is m1, and then placed at 20 ℃ and 65% relative humidity for 2 hours, wherein the weight of the fabric is m2. The moisture absorption rate was calculated as follows:
wherein α is a moisture absorption rate (%).
Effect test example 2 (moisture removal test):
each of 4 test cloth samples of examples 1-2 was cut out to an appropriate size, and a blank cloth sample not treated with the skin care and moisture retention finishing agent of the present invention was also cut out as a blank control 2, followed by manually rubbing to break the microcapsules, placing at 20 ℃ under 90% relative humidity to constant weight, where the cloth weight was m3, and then placing at 20 ℃ under 65% relative humidity for 2 hours, where the cloth weight was m4. The moisture removal rate was calculated as follows:
wherein β is the moisture removal rate (%).
The test results of the moisture absorption and removal effects are shown in tables 3 to 4.
TABLE 3
TABLE 4
As can be seen from the results in tables 3 to 4, the moisture absorption effect of the pure cotton fabric treated by the skin-care moisture-retention finishing agent prepared by the method of the invention is far better than that of the untreated control sample, the moisture discharge rate is lower than that of the control sample, which indicates that the moisture can be well locked by the active component, and the moisture absorption and moisture discharge effect is still maintained above the initial 80% after 20 times of washing, which indicates that the skin-care moisture-retention finishing agent has better fastness to washing, so that the skin-care moisture-retention finishing agent based on the two-phase microcapsule has excellent comprehensive moisture retention effect.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (8)
1. A skin-care moisture-retention finishing agent based on a two-phase microcapsule is characterized in that: the skin-care and moisture-retention finishing agent is prepared from 5-15% of skin-care and moisture-retention microcapsule slurry, 2-6% of adhesive, 0.25-0.75% of cross-linking agent, 1-5% of softening agent and the balance of water according to the percentage.
2. A skin care moisturizing finish based on biphasic microcapsules according to claim 1, characterized in that: the adhesive is at least one of polyacrylate, polyurethane, vinyl acetate, butadiene copolymer and silane polymer;
the cross-linking agent is at least one of polycarboxylic acids, epoxy, chitosan, polyurethane and organosilicon;
the softening agent is at least one of hydroxyl silicone oil, dimethyl silicone oil and amino, epoxy, polyether, polyurethane and polyether block amino modified silicone oil.
3. A biphasic microcapsule according to claim 1, characterised in that: the two-phase microcapsule comprises an inner aqueous phase (1), at least one inner shell (2), at least one oil phase (3) and an outer shell (4).
4. A biphasic microcapsule according to claim 3, characterised in that: the particle size range of the two-phase microcapsule is 0-80 μm.
5. A two-phase microcapsule according to claim 3 wherein: the inner water phase (1) is a mixture of water-soluble active ingredients, gelatin and water, wherein the water-soluble active ingredients comprise but are not limited to at least one of hyaluronic acid and salts thereof, collagen and enzymatic hydrolysis products thereof, vitamin B, vitamin C, silk fibroin and enzymatic hydrolysis products thereof, chitosan, glycerol, sodium lactate, sodium pyrrolidone carboxylate, chondroitin sulfate and sorbitol;
the gelatin is an internal water phase (1) stabilizer;
the weight ratio of the water-soluble active ingredient, the gelatin and the water in the internal water phase (1) is 1-30;
the inner shell (2) is a fully synthetic high molecular polymer;
the oil phase (3) is at least one of squalene, squalane, vaseline, aloe essential oil, jojoba oil, shea butter, vitamin A, vitamin D, fatty glyceride, monoglyceride undecylenate and lecithin;
the shell (4) is a fully synthetic high molecular polymer.
6. A process for the preparation of a biphasic microcapsule according to claim 3, comprising the following steps:
the method comprises the following steps: mixing and dissolving the water-soluble active ingredients, the gelatin and the water according to the weight ratio to obtain an inner water phase;
step two: adding a first emulsifier and a wall material component into the oil phase until the first emulsifier and the wall material component are completely dissolved to obtain an oil phase mixture; wherein the weight ratio of the first emulsifier, the wall material component and the oil phase is 1-5;
step three: adding the oil-phase mixture in the step two into the internal water phase in the step one, firstly carrying out primary emulsification by using low-shear equipment, and then carrying out high-energy emulsification by using a high-pressure homogenizer to form W/O type primary emulsion, wherein the particle size of droplets of the primary emulsion is controlled to be 0-5 μm, preferably 0-2.5 μm, and most preferably 0-1 μm; the weight ratio of the oil phase mixture to the internal aqueous phase is 10.1 to 8, preferably 10;
step four: adding a second emulsifier into water until the second emulsifier is completely dissolved to form an external water phase; wherein the weight ratio of the second emulsifier to water is from 0.1 to 5, preferably from 0.5 to 3, most preferably from 1 to 2;
step five: mixing the external aqueous phase in the fourth step with the primary emulsion in the third step, and performing secondary emulsification by using low-shear equipment to form W/O/W type double emulsion, wherein the particle size of liquid drops of the double emulsion is controlled to be 0-80 μm, preferably 5-30 μm, most preferably 10-20 μm, and the weight ratio of the external aqueous phase to the primary emulsion is 1-2;
step six: slowly heating the obtained double emulsion to 80-90 ℃ under the condition of uniform stirring, preserving heat for 3-5h, and cooling to room temperature to obtain the slurry containing the two-phase skin-care and moisture-retention microcapsule.
7. A process for the preparation of a biphasic microcapsule according to claim 6, characterised in that: the first emulsifier in the second step is a surfactant with HLB value less than or equal to 8, and comprises but is not limited to at least one of polyoxyethylene sorbitol oleate, sorbitan fatty acid ester, glycerol mono/dilaurate, N-dimethyl caproamide, polyglycerol fatty acid ester, calcium alkyl benzene sulfonate and nonylphenoxy polyethoxyethanol;
the wall material component in the second step is an oil-soluble component, including but not limited to at least one of methyl methacrylate, isocyanate, polyaspartic acid ester, urethane, polyether polyol, polyester polyol, carbonate, epoxy resin, styrene and copolymer thereof, vinyl ether, siloxane, amide compound, azo compound and peroxide initiator.
8. A process for the preparation of a biphasic microcapsule according to claim 6, characterised in that: the second emulsifier in the fourth step is at least one of anionic emulsifier, cationic emulsifier, amphoteric emulsifier and nonionic emulsifier, and preferably the anionic emulsifier and the nonionic emulsifier are used in a compounding way;
the anionic emulsifier comprises but is not limited to at least one of linear alkylbenzene sulfonate, branched alkylbenzene sulfonate, fatty alcohol polyoxyethylene ether sulfate, a-sulfo fatty acid ester salt, sulfonate of fatty acid methyl ester ethoxylate, fatty alcohol ether carboxylate, a-alkenyl sulfonate, dodecyl sulfonate, secondary alkyl sulfonate, sodium salt of styrene-maleic anhydride copolymer, lauryl ether sulfonate and lignosulfonate;
the cationic emulsifier includes but is not limited to at least one of selectrium chloride, benzalkonium chloride, quaternary ammonium compounds and amine compounds;
the amphoteric emulsifier includes but is not limited to at least one of amino acids, betaines and imidazolines;
the non-ionic emulsifier comprises at least one of fatty alcohol polyoxyethylene ether, isomeric alcohol polyoxyethylene ether, alkyl glycoside, fatty acid alkanolamide, alkylamine oxide, cocoamide alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, styryl phenol polyoxyethylene ether, alkylphenol formaldehyde resin polyoxyethylene ether, tristyrylphenol polyoxyethylene polyoxypropylene ether, polyethylene glycol, polyoxyethylene sorbitan fatty acid ester and polyvinylpyrrolidone.
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2022
- 2022-07-08 CN CN202210805510.0A patent/CN115387128A/en active Pending
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