CN101406429A - Oil-in-water emulsion and preparation method thereof - Google Patents
Oil-in-water emulsion and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an oil-in-water type emulsion and a preparation method thereof. The compositions of the emulsion are oil phase components, water phase components, solid particles, surface active agents, preservatives, and compound perfume. The oil phase components and the water phase components are heated up and melted respectively, and dispersed uniformly; then the oil phase components are added into the water phase components when the oil phase components and the water phase components are homogeneous at a temperature between 65 and 95 DEG C, are stirred and cooled off and finally the emulsion is formed. During the preparation of the oil-in-water type emulsion, small amount of surface active emulsifying agents are used (less than or equal to 0.5 percent), and the solid particles with the particle diameter of between 30 and 200 nm are used as emulsifying agents. The oil-in-water type emulsion has the advantages of simple emulsion preparation technology, stable property, good rheological property, and mildness and no stimulation to skin because of extremely-low contents of the surface active agents in the system. The oil-in-water type emulsion can be applied to prepare a stimulation-free skincare moisturizer of cosmetics, in particular to sunscreen, suntan lotion, foundation emulsion and foundation cream which contain physical ultraviolet light screeners.
Description
Technical field
The present invention relates to a kind of oil-in-water emulsion and technology of preparing thereof, especially under surfactant-free or dosage of surfactant situation seldom, solid particle plays emulsification, the oil-in-water emulsion that processability is stable.
Background technology
Pickering emulsifying is meant with solid particle and replaces traditional chemical emulsifier that solid particle forms thin film on the dispersed phase drop surface, has stoped the gathering between the drop, makes stable oil/aqueous dispersion phase.During as emulsifying agent, the stability of emulsion depends on the interaction between the particle diameter of solid particle, surface wettability and the solid particle with solid particle, and wherein the wettability of particle surface is most important influence factor.When the solid particles surface contact angle is 90 ° of left and right sides, can form the more stable thin film of structure in oil/water termination, preferable emulsifiability is arranged.
Solid particle and surfactant all have emulsification, but its mechanism of action and emulsifying manner are inequality.The surfactant emulsification system is metastable system, belongs to thermodynamic unstable system.The absorption of surfactant on oil/water termination is a kind of dynamic equilibrium, under certain conditions, can adsorb fast and desorption; When being emulsifying agent with the surfactant, the difference of oil phase can influence the type that forms emulsion; Under certain conditions, phase inversion also takes place in surfactant emulsification system easily; The HLB value is the measurement index of surfactant emulsification property, and the surfactant of different HLB values is suitable for emulsifying oil/water of different nature.And can make all highly stable oil/aqueous dispersion of kinetics, thermodynamics during utilization solid particle emulsifying; Solid particle can form a kind of stable film in oil/water termination; In system not can with other component interaction, the excellent compatibility energy is arranged; In the solid particle emulsification system, the character of oil phase does not influence the type that forms emulsion, but the initial dispersion position of granule in system can influence the type that forms emulsion; The initial existence of solid particle is generally continuous phase mutually, in emulsion process, and can be by adjusting the emulsifying type that oil, water ratio change system; Surface wettability is the determiner that solid particle can be used as emulsifying agent.
HLB value with surfactant is the same, and the wettability of solid particles surface is to determine that quantitatively system forms the important evidence of oil-in-water emulsion system.Though it is amphipathic that solid particle has unlike surfactant molecule, it has very strong surface activity, can cover the emulsion droplet surface, effectively stops the gathering between the drop.The repulsion that has covered between the Dispersion of Solid Particles phase drop is to stop collision and accumulative main cause between the drop.There is electrostatic repulsion between the charged drop, in oil-in-water system, Gu/oily interface with electric charge produce stronger long-range repulsion by oily medium, promoted aligning in the solid particle emulsification system of solid particle, the network structure that the stability of emulsion depends primarily in the system between the granule and granule, form between granule and the drop.
With the solid particle is the skin care item prescription of the emulsification system different in kind of emulsifying agent in conventional emulsifier, mainly comprise novel sunscreen prescription and low irritant prescription, the solid particle emulsification system mainly contains following advantage: at first owing to substituted traditional surfactant emulsifiers with the solid particle emulsifying agent zest of prescription is reduced greatly; Secondly the solid particle emulsifying agent itself can be used as the sunscreen use, and with other sunscreen synergistic function is arranged, and reduces total consumption of sunscreen in the prescription, and then reduces the zest of product and make product salubriouser; The 3rd, the use of solid particle emulsifying agent can improve the skin sense of product and smearing property, and the more satisfied product of exploitation consumer improves product market share; The 4th, because the compatibility of solid emulsifier and many active components is better, so the scope when selecting active component can be wider, functional also can embody more obvious of prescription; In addition, the stability of solid particle emulsification system is not subjected to the influence of oils and fats character, and at different skin-protection products, the selection oils and fats of wide region more is to prepare better, the more stable product of performance.
Summary of the invention
The purpose of this invention is to provide a kind of oil-in-water emulsion and preparation method thereof.
The technical solution used in the present invention is:
A kind of oil-in-water emulsion, its composition is by weight percentage:
Oil phase component 5～50%
Water component 50～95%
Solid particle 2～30%
Surfactant 0～0.5%
Antiseptic 0.01～0.5%
Essence 0.01～0.5%
Oil phase component comprises oils and fats and antioxidant, and antioxidant accounts for 0.02～10% of oil phase component.Oils and fats wherein can be mineral grease, Vegetable oil lipoprotein, animal oil and synthetic ester oil; Vegetable oil lipoprotein is almond oil, Jojoba oil, Oleum Camelliae, American Avocado Tree oil, Apricot kernel oil, Camellia oil, Oleum Juglandis, candlenut oil, water Bulbus Allii mustard oil, cameline oil, Adeps Bovis seu Bubali resin, Oleum Cocois, Radix Oenotherae erythrosepalae oil, Oleum Vitis viniferae, olive oil, Oleum Arachidis hypogaeae semen, Semen Tritici aestivi germ oil, Oleum Gossypii semen, Semen Maydis oil, Petiolus Trachycarpi oil; Vegetable wax is palm wax, candelilla wax, Jojoba wax, haze tallow, Cera Flava; Animal oil is mink oil, Adeps Bovis seu Bubali, spermaceti, Cera Flava, lanoline in the oil phase; Oil phase mineral oil in fluid fat is liquid paraffin, vaseline, paraffin, microwax etc.; Synthetic ester oil is lanolin derivative, squalane, polysiloxanes, maleation Oleum Glycines in the oil phase; Fatty acid, pure and mild esters.
Oils and fats in the oil-phase component can be the oils and fats of selecting more than one the liquid oils and fats under room temperature, also can under room temperature be to select more than one oils and fats and liquid fat to mix simultaneously as oil phase component the solid-state oils and fats.
Antioxidant wherein is one or more among Butylated hydroxyanisole, ditertbutylparacresol, epicatechol gallate, nordihydroguaiaretic acid, tocopherol, tertiary butylated hydroquinone, the Arnold Ke Suomo.
Water-phase component comprises distilled water and wetting agent, and wetting agent accounts for 0.1～30% of water component; Wetting agent is one or more of following material: polyalcohols wetting agent, hyaluronic acid wetting agent, lactic acid and sodium lactate wetting agent, pyrrolidone sodium carboxylate, ceramide type wetting agent, amide-type wetting agent, glucose esters wetting agent, collagen protein class wetting agent, chitin derivative and chitosan;
Solid particle is one of titanium dioxide, zinc oxide, bentonite, silicon dioxide, kieselguhr, Kaolin, Pulvis Talci, mica powder, winnofil, and particle size distribution is at 30～200nm;
Surfactant is one of dehydration sorbic alcohol fatty acid ester, polyoxyethylene dehydration sorbic alcohol fatty acid ester, fatty alcohol-polyoxyethylene ether, cithrol, ethoxylated castor oil, glycerine monofatty ester, polyglycerin ester, sucrose monostearate;
Antiseptic is parabens, benzyl alcohol, phenyl phenol, 2-bromo-2-nitropropane-1, one or several compound use of ammediol (Bronopol), hexamethylenetetramine derivant, imidazolidinyl urea, dehydroacetic acid, sorbic acid, Kazon, glyceryl monolaurate, diazonium ureine, methylol glycolylurea, dihydroxymethyl dimethyl hydantion
Essence is the complex that allows in the cosmetics with spice.
A kind of preparation method of oil-in-water emulsion comprises the steps:
(1) oil phase component is heated to 65～95 ℃, obtains finely dispersed oil phase;
(2) surfactant is added the water component, and be heated to 65～95 ℃, obtain finely dispersed water;
(3) solid particle is dispersed in water, under 65～95 ℃,, pours oil phase into water with 10000～28000r/min homogenizing water-phase component, and homogenizing 2～5min;
(4) stir, rotating speed is natural cooling cooling under 100～700r/min, when treating that temperature is reduced to 50～60 ℃, the time, add antiseptic and essence;
(5) rotating speed is after 100～700r/min stirs 20～60min, get final product oil-in-water emulsion.
In the preparation process of oil-in-water emulsion, wherein solid particle plays emulsification, and the surface nature of solid particle is amphiphatic, or the process surface treatment is amphiphilic; The addition of surfactant emulsifiers only is 0～0.5% surfactant emulsifiers, and when the preparation oil-in-water emulsion, HLB value 〉=8 of surfactant emulsifiers.
In the preparation process of oil-in-water emulsion, can add the viscosity of small amounts of water soluble polymer regulation system.Water-soluble polymer can use polyvinylpyrrolidone, vinylpyrrolidone/vinyl acetate co-polymer, polyethylene caprolactam, vinylpyrrolidone/ethylene caprolactam copolymer, polyacrylic polymer etc.
The oil-in-water emulsion of gained of the present invention, because the solid particle emulsification system is all highly stable oil/aqueous dispersion of kinetics, thermodynamics, exhibiting excellent stability with time.
Beneficial effect of the present invention
The oil-in-water emulsion that the present invention obtains, technology is simple, prepared emulsion is stable, rheological property is good, because of surface-active contents in the system is extremely low, to skin gentleness, non-stimulated, can be applied to prepare non-irritating cosmetics facial treatment milk, in the sunscreen cream that contains the physics ultraviolet light screener, sunscreen, foundation emulsion, vanishing cream, surfactant emulsifier content 0～0.5% in system, the ageing stability of emulsion is good.
The specific embodiment
Below in conjunction with instantiation the present invention is described further, but protection scope of the present invention is not limited in this:
Example 1～6
Prescription
The definition of component
Preparation method:
The solid particle emulsifying emulsion of embodiment 1 to 6 has following preparation: 4 to 13 component weighings to the oil phase beaker, to the water beaker, simultaneously are heated to 85 ℃ with oil phase beaker and water beaker with 1 to 3 and 14 to 18 component weighings; Use homogenizer homogenizing water component then, pour oil phase component into water, behind the homogenizing 3min, material is cooled when stirring, when treating that temperature is reduced to 55 ℃, add 19 to 21 each component one by one, stir 30min then, the system homogeneous gets final product.
These embodiments of the foregoing description representative have lot of advantages.For example, the contained amount of surfactant of emulsion is very low, and skin is had lower zest, and the system that makes of solid particle emulsifying simultaneously has good skin sense.Above-mentioned embodiment can be used as sunscreen cream or sunscreen product.
Example 7～12
Prescription
The definition of component
Preparation method:
The solid particle emulsifying emulsion of embodiment 7 to 12 has following preparation: 4 to 17 component weighings to the oil phase beaker, to the water beaker, simultaneously are heated to 85 ℃ with oil phase beaker and water beaker with 1 to 3 and 18 to 22 component weighings; Use homogenizer homogenizing water component then, pour oil phase component into water, behind the homogenizing 3min, material is cooled when stirring, when treating that temperature is reduced to 55 ℃, add 23 to 25 each component one by one, stir 30min then, the system homogeneous gets final product.
These embodiments of the foregoing description representative have lot of advantages.For example, the contained amount of surfactant of emulsion is very low, and skin is had lower zest, and the system that makes of solid particle emulsifying simultaneously has good skin sense.Above-mentioned embodiment can be used as vanishing cream or foundation emulsion product.
Claims (5)
1. oil-in-water emulsion is characterized in that composed as follows by weight percentage:
Oil phase component 5～50%
Water component 50～95%
Solid particle 2～30%
Surfactant 0～0.5%
Antiseptic 0.01～0.5%
Essence 0.01～0.5%
Wherein oil phase component comprises oils and fats and antioxidant, and antioxidant accounts for 0.02～10% of oil phase component, and oils and fats is mineral grease, Vegetable oil lipoprotein, animal oil and synthetic ester oil, can be the above-mentioned greasy compound of one or more; Antioxidant is one or more among Butylated hydroxyanisole, ditertbutylparacresol, epicatechol gallate, nordihydroguaiaretic acid, tocopherol, tertiary butylated hydroquinone, the Arnold Ke Suomo;
Water-phase component comprises distilled water and wetting agent, and wetting agent accounts for 0.1～30% of water component; Wetting agent is one or more of following material: polyalcohols wetting agent, hyaluronic acid wetting agent, lactic acid and sodium lactate wetting agent, pyrrolidone sodium carboxylate, ceramide type wetting agent, amide-type wetting agent, glucose esters wetting agent, collagen protein class wetting agent, chitin derivative and chitosan;
Solid particle is one of titanium dioxide, zinc oxide, bentonite, silicon dioxide, kieselguhr, Kaolin, Pulvis Talci, mica powder, winnofil, and particle size distribution is at 30～200nm;
Surfactant is one of dehydration sorbic alcohol fatty acid ester, polyoxyethylene dehydration sorbic alcohol fatty acid ester, fatty alcohol-polyoxyethylene ether, cithrol, ethoxylated castor oil, glycerine monofatty ester, polyglycerin ester, sucrose monostearate;
Antiseptic is parabens, benzyl alcohol, phenyl phenol, 2-bromo-2-nitropropane-1, one or several compound use of ammediol (Bronopol), hexamethylenetetramine derivant, imidazolidinyl urea, dehydroacetic acid, sorbic acid, Kazon, glyceryl monolaurate, diazonium ureine, methylol glycolylurea, dihydroxymethyl dimethyl hydantion.
Essence is the complex that allows in the cosmetics with spice.
2. as claims 1 described a kind of oil-in-water emulsion, it is characterized in that in the described oil phase:
Vegetable oil lipoprotein is almond oil, Jojoba oil, Oleum Camelliae, American Avocado Tree oil, Apricot kernel oil, Camellia oil, Oleum Juglandis, candlenut oil, water Bulbus Allii mustard oil, cameline oil, Adeps Bovis seu Bubali resin, Oleum Cocois, Radix Oenotherae erythrosepalae oil, Oleum Vitis viniferae, olive oil, Oleum Arachidis hypogaeae semen, Semen Tritici aestivi germ oil, Oleum Gossypii semen, Semen Maydis oil, Petiolus Trachycarpi oil; Vegetable wax is palm wax, candelilla wax, Jojoba wax, haze tallow, Cera Flava;
Animal oil is mink oil, Adeps Bovis seu Bubali, spermaceti, Cera Flava, lanoline;
Mineral grease is liquid paraffin, vaseline, paraffin, microwax;
Synthetic ester oil is lanolin derivative, squalane, polysiloxanes, maleation Oleum Glycines, fatty acid, pure and mild esters.
3. as claims 1 described a kind of oil-in-water emulsion, it is characterized in that surface-active contents 0～0.5%.
4. as claims 1 described a kind of oil-in-water emulsion, it is characterized in that HLB value 〉=8 of surfactant emulsifiers.
5. as claims 1 described a kind of oil-in-water emulsion, it is characterized in that preparation process is as follows:
(1) oil phase component is heated to 65～95 ℃, obtains finely dispersed oil phase;
(2) surfactant is added the water component, and be heated to 65～95 ℃, obtain finely dispersed water;
(3) solid particle is dispersed in water, under 65～95 ℃,, pours oil phase into water with 10000～28000r/min homogenizing water-phase component, and homogenizing 2～5min;
(4) stir, rotating speed is natural cooling cooling under 100～700r/min, when treating that temperature is reduced to 50～60 ℃, adds antiseptic and essence;
(5) rotating speed is after 100～700r/min stirs 20～60min, get final product oil-in-water emulsion.
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