Polymer with ultraviolet absorption properties and application of same to cosmetics
A technology of absorbing properties and polymers, which is applied in the field of polymers with ultraviolet absorbing properties, can solve problems such as unsafety and skin discomfort, and achieve the effects of convenient operation, reduced decay rate, and improved touch and skin feel
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0053] The concrete preparation steps of polymer are as follows:
[0054] 1) Preparation of 4-benzyloxy-2-nitroaniline: Mix 3-nitro-4 aminophenol with anhydrous potassium carbonate at a weight ratio of 1:5, add acetone as a solvent, and drop 0.5 parts by weight of chlorinated Benzyl, reflux reaction for 24h, distill the solvent off under reduced pressure, add water to the residue, stir, filter with suction, and dry;
[0055] 2) Diazotization of 4-benzyloxy-2-nitroaniline: mix 4-benzyloxy-2-nitroaniline with water, ice bath, then add 5 times of concentrated hydrochloric acid dropwise, then add 6 times Measure sodium nitrite and continue to react for 30 minutes to obtain diazonium salt;
[0056]3) Preparation of (E)-3-((4-(benzyloxy)-2-nitrophenyl)diazo)phenol: Dissolve an equal weight of phenol in ethanol, then add 4 times the amount of concentrated hydrochloric acid , in an ice bath, add the diazonium salt dropwise, react for 3 hours, filter, wash with ethanol, filter with s...
Embodiment 2
[0064] The preparation method of cosmetic composition, its specific steps are as follows:
[0065] 1) Take side chain hydrogen-containing silicone oil, terminal group vinyl silicone oil and isopropanol and mix, heat to 75°C, then add complexed platinum catalyst equal to 0.4% by weight of side chain hydrogen-containing silicone oil, keep warm at 75°C and continue heating for 30 minutes , take out the resulting solid product, grind it into a fluffy powder, then mix the powder with octamethylcyclotetrasiloxane at a weight ratio of 10:15, and then grind the mixture until it is gel-like to obtain transparent or translucent Gel-like silicone elastomer gel, the silicon hydrogen content in the above-mentioned side-chain hydrogen-containing silicone oil is 0.06%, the amount of isopropanol added is 8.5% of the weight sum of the silicone oil, the side-chain hydrogen-containing silicone oil and the terminal vinyl silicone oil The weight ratio is 1:1.5;
[0066] 2) Mix the gel with the po...
Embodiment 3
[0068] The differences between this embodiment and embodiment 2 are:
[0069] In step 1), the addition amount of the complex platinum catalyst is 0.5% of the weight of the side chain hydrogen-containing silicone oil, the silicon hydrogen content in the side chain hydrogen-containing silicone oil is 0.08%, and the weight ratio of the side chain hydrogen-containing silicone oil to the terminal group vinyl silicone oil is 1 :1.2;
[0070] Step 2) in the addition of 2-aminobenzenesulfonic acid and thiamine pyrophosphate, the concentration in the ultrasonic treatment mixed system is 0.8wt%, and the weight ratio of 2-aminobenzenesulfonic acid and thiamine pyrophosphate is 0.3: 3.2;
[0071] In step 2), an auxiliary film-forming agent vaseline oil with a weight ratio of 5% is added to the ultrasonic treatment mixed system;
[0072] The other steps were consistent with Example 2 to prepare a cosmetic composition.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More