CN111631973A - High-stability sunscreen stick and preparation method thereof - Google Patents

Abstract

The invention discloses a high-stability sunscreen stick and a preparation method thereof, wherein the sunscreen stick comprises the following components in percentage by mass: 0.1 to 0.8% of dibutyl ethylhexanoyl glutamide, 1 to 8% of dibutyl lauroyl glutamide, 0.2 to 2% of dimethyl silylated silica and 10 to 20% of dioctyl carbonate; the sunscreen stick is convenient to use, and no essence, pigment or preservative is added; the texture is fresh and cool, and sticky skin feeling and experience are avoided when the mask is used; the sunscreen agent is compounded by a plurality of sunscreen agents, so that the broad-spectrum sunscreen effect is achieved, the SPF value is high, the damage of ultraviolet rays can be greatly reduced, and the addition amount of the sunscreen agent is reduced; the sunscreen stick also has the advantage of high stability, the sunscreen agent is well stabilized in the formula, the product is not crystallized and separated out, no sweating occurs, and the sunscreen effect is further enhanced while the high stability is obtained.

Description

High-stability sunscreen stick and preparation method thereof

Technical Field

The invention belongs to the field of daily chemicals, relates to a sun-proof product, and particularly relates to a high-stability sun-proof stick and a preparation method thereof

Background

The sun-shading. The sunscreen product is used as a common cosmetic, and can block or absorb ultraviolet rays to prevent skin from being sunburned and sunburned. The current sunscreen products are of various types, sunscreen creams, sunscreen milks, sunscreen sprays, sunscreen sticks, and the like.

Among them, sunscreen sprays and sunscreen sticks are more popular with consumers due to their convenience of use. Sunscreen sprays are generally used more fresher, but are bulky and often not portable in aircraft, high-speed rail, and other vehicles for safety reasons. The sun-screening stick is relatively small in size and convenient to carry, but the sun-screening stick is greasy and not refreshing; and most of the existing sunscreen sticks have poor stability, and the problems of bleeding, crystallization, precipitation, sweating and the like are easily caused in the storage process, so that the use effect is influenced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the sunscreen stick which is convenient to carry and use, has good sunscreen performance, is not greasy and has high stability.

In order to achieve the purpose, the invention adopts the technical scheme that: a sunscreen stick comprises the following components in percentage by mass: 0.1 to 0.8% of dibutyl ethylhexanoyl glutamide, 1 to 8% of dibutyl lauroyl glutamide, 0.2 to 2% of dimethyl silylated silica and 10 to 20% of dioctyl carbonate.

The dibutyl ethylhexanoyl glutamine is gel powder derived from L-glutamic acid, is an efficient oil phase thickener and a gelling agent, and can form high-transparency gel; and the high-temperature-stability thickening agent also has better high-temperature stability, can be used for thickening various oils and silicone oil, and can effectively improve the system stability.

The dibutyl lauroyl glutamine is gel powder derived from L-glutamic acid, is an efficient oil phase thickener, enables the oil phase to form colloids with different hardness, is high in finished product transparency, does not influence the touch of a product, is good in high-temperature stability, and can also efficiently improve the system stability.

The dimethyl silyl silica is a fresh oil phase thickener, can effectively stabilize a sun protection system and has a certain function of increasing the SPF value.

The dioctyl carbonate is used as an organic sunscreen solvent, so that the skin feel is fresh and cool without being sticky; and it is also effective in solubilizing sunscreen agents, reducing sunscreen agent crystallization.

The dioctyl carbonate can well dissolve the sunscreen agent in a system, and the silica dimethyl silylate can effectively suspend the sunscreen agent and reduce molecular sedimentation; dibutyl ethylhexanoyl glutamine and dibutyl lauroyl glutamine can form a firm and reliable three-dimensional network structure; the four components act synergistically to lock the sunscreen agent in a three-dimensional network structure together, so that the intermolecular collision probability is reduced, and the occurrence of unstable factors is reduced; and the formation of the net structure can effectively block and disperse the sunscreen agent, so that the sunscreen agent can better absorb ultraviolet rays, the stability of the product is greatly improved, and the SPF value is effectively improved.

Further, the sunscreen stick also comprises a sunscreen agent.

As a preferred embodiment of the invention, the sun-proof stick comprises the following sun-proof agents in percentage by mass: 1-5% of bis-ethylhexyloxyphenol methoxyphenyl triazine, 2-10% of diethylamino hydroxybenzoyl hexyl benzoate, 3-10% of octocrylene, 2-10% of ethylhexyl methoxycinnamate and 1-5% of ethylhexyl salicylate.

The bis-ethylhexyloxyphenol methoxyphenyl triazine is a novel broad-spectrum sunscreen agent, can protect part of UVB and most of UVA, and has the absorption wavelength of 290-370 nm; it has high molecular weight, is not easy to be absorbed by skin, has good compatibility with other sunscreen agents and high stability, and can be used as stabilizer of other chemical sunscreen agents.

The oil-soluble chemical sunscreen agent with the diethylamino hydroxybenzoyl hexyl benzoate sunscreen wave band of 320-400 nm can protect UVA and has good light stability.

Octocriline is a safer oil-soluble chemical sunscreen agent, has relatively low stimulation to skin, can absorb UVA and UVB with ultraviolet middle wave band of 250-360nm, and can reach higher SPF (specific pathogen free) sun protection index by matching with other sunscreen agents.

The ethylhexyl methoxycinnamate has no stimulation to skin, is good in safety, is an ideal sun-screening agent, has high absorption rate to ultraviolet rays of 280-310 nm, and also has certain absorption in a short wave UVA section.

The ethylhexyl salicylate is a UVB absorbent with an absorption wavelength of 290-330 nm, and the component is often combined with other sunscreens to enhance the solubility of the sunscreens.

According to the invention, multiple sunscreens are compounded, so that the broad-spectrum sunscreen effect is achieved, the multiple sunscreens also have the SPF (specific pathogen free) synergistic effect, and the dosage of each sunscreen component can be reduced.

As a preferred embodiment of the present invention, the sunscreen stick further comprises the following thickeners in percentage by mass: 3-10% of polyethylene, 0.5-3% of beeswax and 1-8% of candelilla wax.

The polyethylene has excellent thickening capacity and can stabilize the system and effectively improve the hardness, breaking force and melting point of the system.

Beeswax is a fatty substance secreted by the wax gland of bees, and can form a protective film on the surface of skin, so that the skin is kept moist and moistened for a long time and is cared.

The candelilla wax is natural plant wax, is green and safe, forms a protective film on the surface of skin, isolates external pollution and invasion, helps long-acting slow release of nutrient substances, and maintains the softness, softness and moisture of the skin.

As a preferred embodiment of the present invention, the sunscreen stick further comprises the following emollients in percentage by mass: 10-20% of octyl dodecanol and 8-16% of caprylic/capric triglyceride.

As a preferred embodiment of the present invention, the sunscreen stick further comprises the following adsorbent by mass percent: 2-15% of silica and 2-10% of kaolin.

The silica is round rolling ball-shaped powder, can improve the skin feeling, brings the silky experience, and can improve the SPF sun protection value of the product.

The kaolin is a natural soft mineral, has the functions of adsorption and filling, can absorb skin grease, effectively reduces the greasy feeling of the product, and increases the freshness.

As a preferred embodiment of the present invention, the sunscreen stick further comprises an antioxidant, a skin conditioner and a moisturizer.

More preferably, the antioxidant is tocopherol and accounts for 0.1-0.5% of the mass percentage of the sunscreen stick; the skin conditioner is bisabolol, and accounts for 0.1-0.3% of the sunscreen stick in percentage by mass; the humectant is caprylyl glycol and accounts for 0.1-0.3% of the sunscreen stick in percentage by mass.

The tocopherol is derived from a concentrated mixed natural antioxidant of edible oil, can protect lipoprotein and unsaturated fatty acid in cells, remove free radicals, and provide long-acting conditioning and moisture retention for skin.

The bisabolol is extracted from chrysanthemum plants, and has anti-inflammatory and antibacterial effects; it has good stability and skin compatibility, and can reduce skin inflammation, relieve skin acne, improve skin irritation resistance, and repair skin with inflammation injury.

The bisabolol and the tocopherol can reduce the irritation while reducing the ultraviolet injury under the condition of proper addition amount of the sun-screening agent.

As a preferred embodiment of the invention, the sunscreen stick is composed of the following components in percentage by mass: 0.3% dibutylethylhexanoylglutamine, 4% dibutyllauroylglutamine, 1.5% dimethylsilylated silica, 13.1% dioctyl carbonate, 3% bis-ethylhexyloxyphenol methoxyphenyl triazine, 5% hexyl diethylaminohydroxybenzoylbenzoate, 8% octocrylene, 8% ethylhexyl methoxycinnamate, 4% ethylhexyl salicylate, 8% polyethylene, 1.5% beeswax, 4% candelilla wax, 14% octyldodecanol, 11% caprylic/capric triglyceride, 8% silica, 6% kaolin, 0.2% tocopherol, 0.2% bisabolol and 0.2% caprylyl glycol.

The invention also provides a preparation method of the sun-proof rod, which comprises the following steps:

1) heating the phase A to 120-130 ℃ to dissolve the phase A until no particles exist;

2) adding the phase B into the phase A, dissolving and uniformly stirring;

3) cooling the mixture obtained in the step 2) to 90-95 ℃, and keeping the temperature for 10-15 minutes;

4) dissolving the phase C until the phase C is clear and transparent, adding the phase C into the mixture obtained in the step 3), and uniformly stirring;

5) adding the D-phase material, and stirring until the D-phase material is uniformly dispersed;

6) cooling to 80-85 ℃, adding the phase E, and uniformly stirring;

wherein the content of the first and second substances,

the phase A is as follows: octyldodecanol, dibutylethylhexanoylglutamine and dibutyllauroylglutamine;

the phase B is as follows: polyethylene, beeswax, candelilla wax, caprylic/capric triglyceride and silica dimethyl silylate;

the phase C is as follows: dioctyl carbonate, bis-ethylhexyloxyphenol methoxyphenyl triazine, hexyl diethylamino hydroxybenzoyl benzoate, octocrylene, ethylhexyl methoxycinnamate and ethylhexyl salicylate;

the phase D is as follows: silica and kaolin;

the phase E is as follows: tocopherol, bisabolol and caprylyl glycol.

The sun-proof stick is convenient to use, and does not contain any essence, pigment or preservative; it has refreshing texture, and does not have sticky skin feeling and experience when in use. By compounding various sunscreens, the sun-screening agent has broad-spectrum sun-screening and high SPF value, can greatly reduce the damage of ultraviolet rays and simultaneously reduce the addition amount of the sunscreens; the addition of the bisabolol and the tocopherol can further effectively relieve the skin, mildly care the skin, reduce the skin irritation and be safer. The sunscreen stick also has the advantage of high stability, and the sunscreen agent is well stabilized in the formula by adding the dioctyl carbonate, the dimethyl silica silylate, the dibutyl ethyl hexanoyl glutamine and the dibutyl lauroyl glutamine, so that the product does not crystallize and separate out and does not sweat, and the sunscreen effect is further enhanced while the high stability is obtained.

Detailed Description

To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.

Example 1

According to one embodiment of the sunscreen stick, the sunscreen stick comprises the following components in percentage by mass: 0.3% dibutylethylhexanoylglutamine, 4% dibutyllauroylglutamine, 1.5% dimethylsilylated silica, 13.1% dioctyl carbonate, 3% bis-ethylhexyloxyphenol methoxyphenyl triazine, 5% hexyl diethylaminohydroxybenzoylbenzoate, 8% octocrylene, 8% ethylhexyl methoxycinnamate, 4% ethylhexyl salicylate, 8% polyethylene, 1.5% beeswax, 4% candelilla wax, 14% octyldodecanol, 11% caprylic/capric triglyceride, 8% silica, 6% kaolin, 0.2% tocopherol, 0.2% bisabolol and 0.2% caprylyl glycol.

The invention also provides a preparation method of the sun-proof rod, which comprises the following steps:

1) heating the phase A to 120-130 ℃ to dissolve the phase A until no particles exist;

2) adding the phase B into the phase A, dissolving and uniformly stirring;

3) cooling the mixture obtained in the step 2) to 90-95 ℃, and keeping the temperature for 10-15 minutes;

4) dissolving the phase C until the phase C is clear and transparent, adding the phase C into the mixture obtained in the step 3), and uniformly stirring;

5) adding the D-phase material, and stirring until the D-phase material is uniformly dispersed;

6) cooling to 80-85 ℃, adding the phase E, and uniformly stirring;

wherein the content of the first and second substances,

the phase A is as follows: octyldodecanol, dibutylethylhexanoylglutamine and dibutyllauroylglutamine;

the phase B is as follows: polyethylene, beeswax, candelilla wax, caprylic/capric triglyceride and silica dimethyl silylate;

the phase C is as follows: dioctyl carbonate, bis-ethylhexyloxyphenol methoxyphenyl triazine, hexyl diethylamino hydroxybenzoyl benzoate, octocrylene, ethylhexyl methoxycinnamate and ethylhexyl salicylate;

the phase D is as follows: silica and kaolin;

the phase E is as follows: tocopherol, bisabolol and caprylyl glycol.

Examples 2 to 9

Examples of sunscreen sticks according to the present invention have the following composition.

Table 1 weight percentages of the components of examples 2-9

The preparation method of the sunscreen stick is the same as that of example 1.

Comparative example 1

Comparative example of sunscreen stick according to the invention this comparative example is the same as example 1 except that it does not contain dibutyl lauroyl glutamide.

Comparative example 2

Comparative example of sunscreen stick according to the invention this comparative example is the same as example 1 except that it does not contain dibutyl ethylhexanoyl glutamide.

Comparative example 3

Comparative example of sunscreen stick according to the invention this comparative example is the same as example 1 except that it does not contain dioctyl carbonate.

Comparative example 4

Comparative example of sunscreen stick according to the invention this comparative example is the same as example 1 except that it does not contain silica dimethyl silylate.

Comparative example 5

Comparative example of sunscreen stick according to the invention, this comparative example is the same as example 1 except that it does not contain dibutyl lauroyl glutamine and dibutyl ethylhexanoyl glutamine.

Comparative example 6

Comparative example of sunscreen stick according to the invention this comparative example is identical to example 1 except that it does not contain dibutyl lauroyl glutamine, dibutyl ethylhexanoyl glutamine, dioctyl carbonate, silica dimethyl silylate.

Comparative example 7

Comparative example of sunscreen stick according to the invention this comparative example is the same as example 1 except that it does not contain dioctyl carbonate, silica dimethyl silylate. SFP value test results for each sunscreen stick

The samples of examples 1 to 9 and each of the comparative examples were uniformly coated on quartz glass to which 3M rubberized fabric was attached, and the SPF value of each sample was measured by an instrument. The results of SPF testing for examples 1-9 and the comparative examples are shown in Table 2.

Table 2SPF value test results

Dibutyl lauroyl glutamine, dibutyl ethylhexanoyl glutamine, dioctyl carbonate and silica dimethyl silylate have synergistic effect, and can significantly improve SPF value.

Second, stability test results

The lipstick finished products obtained in the examples 1-9 and the comparative samples were respectively filled into 6 lipstick finished products, 2 lipstick finished products were vertically placed in equipment with different temperature environments (a 48 ℃ electrothermal blowing drying box, a 25 ℃ constant temperature incubator and a-15 ℃ refrigerator) at each average temperature point, and the lipstick finished products were observed every other day and returned to normal temperature to observe whether the lipstick finished products sweated (sunscreen agent precipitated). The test duration was 3 months. And if the sweating condition occurs when only 1 lipstick is used for 2 lipstick finished products, judging that the lipstick finished products sweat. The results are shown in Table 3.

Table 3 stability test results

Under the observation of three temperature points, only the lipstick finished products of the examples 1-9 have no sweating condition, and the stability is the best; the dibutyl lauroyl glutamine, dibutyl ethylhexanoyl glutamine, dioctyl carbonate and silica dimethyl silylate have synergistic effect, and can obviously improve the system stability and reduce the sweating of the product.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (9)

1. The sunscreen stick is characterized by comprising the following components in percentage by mass: 0.1 to 0.8% of dibutyl ethylhexanoyl glutamide, 1 to 8% of dibutyl lauroyl glutamide, 0.2 to 2% of dimethyl silylated silica and 10 to 20% of dioctyl carbonate.

2. The sunscreen stick according to claim 1, further comprising the following sunscreen agents in percentage by mass: 1-5% of bis-ethylhexyloxyphenol methoxyphenyl triazine, 2-10% of diethylamino hydroxybenzoyl hexyl benzoate, 3-10% of octocrylene, 2-10% of ethylhexyl methoxycinnamate and 1-5% of ethylhexyl salicylate.

3. The sunscreen stick according to claim 1, further comprising a thickener in the following weight percent: 3-10% of polyethylene, 0.5-3% of beeswax and 1-8% of candelilla wax.

4. The sunscreen stick according to claim 1, further comprising the following emollients in percentage by mass: 10-20% of octyl dodecanol and 8-16% of caprylic/capric triglyceride.

5. The sun-blocking rod according to claim 1, further comprising an adsorbent comprising, in mass percent: 2-15% of silica and 2-10% of kaolin.

6. The sunscreen stick of claim 1 further comprising an antioxidant, a skin conditioning agent, and a humectant.

7. The sunscreen stick according to claim 6, wherein the antioxidant is tocopherol, and accounts for 0.1-0.5% of the sunscreen stick by mass; the skin conditioner is bisabolol, and accounts for 0.1-0.3% of the sunscreen stick in percentage by mass; the humectant is caprylyl glycol and accounts for 0.1-0.3% of the sunscreen stick in percentage by mass.

8. The sunscreen stick according to claim 1, characterized by consisting of the following components in percentage by mass: 0.3% dibutylethylhexanoylglutamine, 4% dibutyllauroylglutamine, 1.5% dimethylsilylated silica, 13.1% dioctyl carbonate, 3% bis-ethylhexyloxyphenol methoxyphenyl triazine, 5% hexyl diethylaminohydroxybenzoylbenzoate, 8% octocrylene, 8% ethylhexyl methoxycinnamate, 4% ethylhexyl salicylate, 8% polyethylene, 1.5% beeswax, 4% candelilla wax, 14% octyldodecanol, 11% caprylic/capric triglyceride, 8% silica, 6% kaolin, 0.2% tocopherol, 0.2% bisabolol and 0.2% caprylyl glycol.

9. A method of making a sunscreen stick as in claim 8 comprising the steps of:

1) heating the phase A to 120-130 ℃ to dissolve the phase A until no particles exist;

2) adding the phase B into the phase A, dissolving and uniformly stirring;

3) cooling the mixture obtained in the step 2) to 90-95 ℃, and keeping the temperature for 10-15 minutes;

4) dissolving the phase C until the phase C is clear and transparent, adding the phase C into the mixture obtained in the step 3), and uniformly stirring;

5) adding the D-phase material, and stirring until the D-phase material is uniformly dispersed;

6) cooling to 80-85 ℃, adding the phase E, and uniformly stirring;

wherein the content of the first and second substances,

the phase A is as follows: octyldodecanol, dibutylethylhexanoylglutamine and dibutyllauroylglutamine;

the phase B is as follows: polyethylene, beeswax, candelilla wax, caprylic/capric triglyceride and silica dimethyl silylate;

the phase C is as follows: dioctyl carbonate, bis-ethylhexyloxyphenol methoxyphenyl triazine, hexyl diethylamino hydroxybenzoyl benzoate, octocrylene, ethylhexyl methoxycinnamate and ethylhexyl salicylate;

the phase D is as follows: silica and kaolin;

the phase E is as follows: tocopherol, bisabolol and caprylyl glycol.