Separation and detection method of triazine ultraviolet absorber in sebs
A technology of ultraviolet absorber and separation method, which is applied in the field of separation and detection of triazine ultraviolet absorbers in SEBS, can solve problems such as immature production technology and process
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Embodiment 1
[0114] (1) Take 1 g of SEBS (the weight average molecular weight of SEBS is 500,000), wherein SEBS contains 0.5% UV-1164, and dissolve the polymer in 40 mL of a mixed solvent of dioxane and tetrahydrofuran ( Dioxane and tetrahydrofuran (volume ratio 1:1), stirred at 30 °C for 4 hours until the polymer was completely dissolved to obtain a mixed solution;
[0115] (2) In the reaction device with reflux, stirring and temperature control system, add the above polymer solution in advance, control the temperature at about 10°C, and slowly add 0.12g of chlorosulfonic acid to the system under vigorous stirring, drop After the addition is completed, a mixed gas of sulfur dioxide and nitrogen is introduced into the system (the volume ratio of sulfur dioxide and nitrogen is 1:8), and the sulfonation time is 1.5h to obtain a solution containing sulfonated UV-1164.
[0116] (3) Heat the sulfonated polymer solution to room temperature, add 50 mL of solvent water, shake vigorously in a separ...
Embodiment 2
[0121] (1) Take 1 g of SEBS and PE mixed polymer (weight average molecular weight of SEBS is 20000), wherein SEBS contains UV-1164 with a mass fraction of 1%, and the polymer is pulverized by a freeze pulverizer and dissolved in In a solvent of 40 mL tetrahydrofuran, stir at 30 °C for 5 hours until the polymer is completely dissolved to obtain a mixed solution;
[0122] (2) In the reaction device with reflux, stirring and temperature control system, add the above polymer solution in advance, control the temperature at about -10°C, and slowly add 0.10g of chlorosulfonic acid to the system under vigorous stirring, After the dropwise addition, a mixed gas of sulfur dioxide and nitrogen (volume ratio of sulfur dioxide and nitrogen is 1:1) was introduced into the system, and the sulfonation time was 3 hours to obtain a solution containing sulfonated UV-1164.
[0123] (3) Heat the sulfonated polymer solution to room temperature, add 50 mL of solvent water, shake vigorously in a sepa...
Embodiment 3
[0126] (1) Take 1 g of SEBS and PP mixed polymer (weight average molecular weight of SEBS is 100000), wherein SEBS contains UV-1164 with a mass fraction of 3%, and the polymer is pulverized by a freeze pulverizer and dissolved in In a solvent of 40 mL tetrahydrofuran, stir at 30 °C for 5 hours until the polymer is completely dissolved to obtain a mixed solution;
[0127] (2) In the reaction device with reflux, stirring and temperature control system, add the above polymer solution in advance, control the temperature at about -5°C, and slowly add 0.10g of chlorosulfonic acid to the system under vigorous stirring, After the dropwise addition, a mixed gas of sulfur dioxide and nitrogen (volume ratio of sulfur dioxide and nitrogen: 1:5) was introduced into the system, and the sulfonation time was 2.5 hours to obtain a solution containing sulfonated UV-1164.
[0128] (3) Heat the sulfonated polymer solution to room temperature, add 50 mL of solvent water, shake vigorously in a sepa...
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