Ternary hydrotalcite-rare earth-calcium/zinc nontoxic composite heat stabilizer and preparation thereof
A composite heat stabilizer and hydrotalcite technology, which is applied in the field of plastic processing aids to achieve the effects of no vulcanization pollution, smooth appearance, and improved thermal stability
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Embodiment 1
[0037] Weigh 38g MgCl respectively 2 (0.4mol), 13.36g (0.1mol) AlCl 3 and 17.74 g of ReCl 3 , after mixing, add deionized water to 500ml to prepare Mg 2+ / Al 3+ Mixed salt solution with a molar ratio of 3; weigh 42.4g Na 2 CO 3Add (0.4mol) 38.4gNaOH (0.96mol) to 500ml of deionized water, prepare a mixed lye and add it to the reaction kettle, add the prepared magnesium aluminum rare earth salt solution and stir quickly, control the temperature between 90°C and 100°C, and strongly Stir to keep the pH value at 9-11, continue to stir for 30 minutes after the addition is complete, then add stearic acid with a mass fraction of 3%, continue to stir and react for 1 hour, crystallize at 50°C for 8-12 hours, and dry to obtain Intercalation modified rare earth magnesium aluminum ternary hydrotalcite.
[0038] 25.6g of ternary hydrotalcite prepared by the above process, 10.2g of rare earth stearate, 16g of zinc acrylate, 20.2g of calcium stearate, 15g of lubricant, 4g of antioxidant...
Embodiment 2
[0040] Weigh 38g MgCl respectively 2 (0.4mol), 13.36g (0.1mol) AlCl 3 and 57.4 g of ZnSO 4 ·7H 2 O, add deionized water to 500ml after mixing to prepare Mg 2+ / Al 3+ Mixed salt solution with a molar ratio of 3; weigh 42.4g Na 2 CO 3 Add (0.4mol) 38.4gNaOH (0.96mol) to 500ml with deionized water, prepare mixed lye and add it to the reaction kettle, add the prepared magnesium-aluminum-zinc salt solution and stir quickly, control the temperature between 90°C and 100°C, and strongly Stir to keep the pH value at 9-11, continue to stir for 30 minutes after the addition is complete, then add stearic acid with a mass fraction of 4%, continue to stir and react for 1 hour, crystallize at 60°C for 8-12 hours, and dry to obtain Intercalation-modified magnesium-aluminum-zinc ternary hydrotalcite.
[0041] 24.6g of ternary hydrotalcite prepared by the above process, 8.1g of rare earth citrate, 26g of zinc stearate, 27.8g of calcium stearate, 90g of lubricant, 2.5g of antioxidant, and...
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