Preparation method of polyurethane hollow microspheres and photoprotective cosmetic composition containing it
A technology of hollow microspheres and polyurethane, which is applied in the field of preparation of polyurethane hollow microspheres, and can solve problems such as residues, unfavorable formulations of cosmetic compositions, safety and health, etc.
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Embodiment 1
[0071] 20 parts by weight CP-1055, 28 parts by weight 161, 62 parts by weight The organic phase composed of HT100 and 0.03 parts by weight of dibutyltin dilaurate was mixed uniformly at room temperature, and the molar ratio of isocyanate group to hydroxyl group was 7.4. Using a high-speed disperser at 750rpm, 110 parts by weight of deionized water was slowly added to the above-mentioned organic phase within 20 minutes, dispersed for 55 minutes, then poured into a 500ml three-necked flask, and 0.75 parts by weight of 90SH-400 was added. The temperature was raised to 60 °C under stirring at 150 rpm, and the temperature was raised to 80 °C for 3 hours after the reaction for 4 h, cooled to room temperature, and filtered with a 100-mesh filter to obtain a white polyurethane hollow microsphere suspension with a solid content of 49%, which was carried out by a hanging bag centrifuge. After solid-liquid separation, it was washed three times with deionized water, and the filter ...
Embodiment 2
[0073] 10 parts by weight of DL-400, 23 parts by weight CP-1055, 25 parts by weight 3010, 55 parts by weight 270, 10 parts by weight The organic phase composed of HT100 and 0.04 parts by weight of dibutyltin dilaurate was mixed uniformly at room temperature, and the molar ratio of isocyanate group to hydroxyl group was 2.2. Using a high-speed disperser at 500rpm, 123 parts by weight of deionized water was slowly added to the above organic phase within 10 minutes, dispersed for 30 minutes, then poured into a 500ml three-necked flask, added 0.75 parts by weight of 90SH-400, at 150rpm The temperature was raised to 55°C under stirring, and the temperature was raised to 85°C for 2 hours after reaction for 5 hours, cooled to room temperature, and filtered through a 100-mesh filter to obtain a white polyurethane hollow microsphere suspension with a solid content of 49.7%, which was solid-liquid using a hanging bag centrifuge After separation, it was washed three times with d...
Embodiment 3
[0075] 57 parts by weight of CMA-2085, 5 parts by weight HDI, 10 parts by weight HT100, 38 parts by weight 161. 0.03 parts by weight of dibutyltin dilaurate to form an organic phase that was mixed uniformly at room temperature, and the molar ratio of isocyanate group to hydroxyl group was 4.8. Using a high-speed disperser at 1000rpm, 110 parts by weight of deionized water was slowly added to the above organic phase within 5 minutes, dispersed for 10 minutes, then poured into a 500ml three-necked flask, added 0.75 parts by weight of 90SH-400, at 150rpm The temperature was raised to 50 °C under stirring, and then heated to 90 °C for 1 h after the reaction, cooled to room temperature, and filtered through a 100-mesh filter to obtain a white polyurethane hollow microsphere suspension with a solid content of 49.5%, and the solid-liquid separation was carried out by a centrifuge. After washing with deionized water three times, the filter cake was dried in a vacuum drying oven ...
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