PVC stabilizer and preparation method thereof
A stabilizer, CH2 technology, used in the field of PVC stabilizers, can solve the problems of increased blooming and blooming, and achieve the effects of improving compatibility, easy synthesis and good stability
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Embodiment 1
[0038] 1) Mix 500g of xylene and 25g of anhydrous magnesium sulfate evenly, continue to stir for 2 hours, filter to remove anhydrous magnesium sulfate, and obtain dehydrated xylene; fully dissolve 504g of HDI trimer in 500g of dehydrated xylene, and place in a nitrogen environment Next, add 0.5g of dibutyltin dilaurate, control the temperature at 5°C, and add 1500g of hydrogenated polybutadiene diol with a molecular weight of 500 dropwise at a constant speed for 8 hours;
[0039] 2) Control the temperature at 90°C, add 300g of succinic anhydride, and control the reaction progress through the acid value until the acid value is less than 60mgKOH / g;
[0040] 3) Add 648g of 1,3-bis(4,5-dihydro-2-oxazolyl)benzene to the above product, and verify 1,3-bis(4,5-dihydro-2-oxazolyl) by HPLC and acid value 2-oxazolyl) benzene reaction is completely centrifuged and dried to obtain the target product, and the GPC method records that the molecular weight is 7789, 1 H NMR (solvent: deuterate...
Embodiment 2
[0042] 1) Mix 500g of xylene and 25g of anhydrous magnesium sulfate evenly, continue to stir for 2h, filter to remove anhydrous magnesium sulfate, and obtain dehydrated xylene; fully dissolve 666g of IPDI trimer in 500g of dehydrated xylene, and Under ambient conditions, add 0.5g of dibutyltin dilaurate, control the temperature at 5°C, and add 1500g of hydrogenated polybutadiene diol with a molecular weight of 500 dropwise at a constant speed for 8 hours;
[0043] 2) Control the temperature at 90°C, add 300g of succinic anhydride, and control the reaction progress through the acid value until the acid value is less than 58mgKOH / g;
[0044] 3) Add 648g of 1,3-bis(4,5-dihydro-2-oxazolyl)benzene to the above product, and verify 1,3-bis(4,5-dihydro-2-oxazolyl) by HPLC and acid value 2-oxazolyl)benzene reaction is complete, centrifugal, dry, obtain target product, GPC method records molecular weight and is 8109, 1 H NMR (solvent: deuterated chloroform) δ: 3.16, 1.55, 1.40, 1.84 (I...
Embodiment 3
[0046] 1) Mix 500g of xylene and 25g of anhydrous magnesium sulfate evenly, continue to stir for 2h, filter to remove anhydrous magnesium sulfate, and obtain dehydrated xylene; fully dissolve 522g of TDI trimer in 500g of dehydrated xylene, and place in a nitrogen environment Next, add 0.5g of dibutyltin dilaurate, control the temperature at 5°C, and add 1500g of hydrogenated polybutadiene diol with a molecular weight of 500 dropwise at a constant speed for 8 hours;
[0047] 2) Control the temperature at 90°C, add 300g of succinic anhydride, and control the reaction progress through the acid value until the acid value is less than 60mgKOH / g;
[0048] 3) Add 648g of 1,3-bis(4,5-dihydro-2-oxazolyl)benzene to the above product, and verify 1,3-bis(4,5-dihydro-2-oxazolyl) by HPLC and acid value 2-oxazolyl)benzene reaction is complete, centrifugal, dry, obtain target product, GPC method records molecular weight and is 7511, 1 H NMR (solvent: deuterated chloroform) δ: 7.18, 2.35, 7....
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