Hydrotalcite-dimer acid lanthanum composite environmental protection stabilizer for PVC, and preparation method thereof
An environmentally friendly stabilizer, lanthanum dimer acid technology, applied in the field of PVC additives, can solve the problems of not being the main stabilizer, poor coloring, low thermal stability, etc., to reduce the balance torque, low cost, and good thermal stability. and processing performance
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[0017] A PVC hydrotalcite dimer lanthanum acid composite environmental stabilizer, which is prepared from the following component raw materials by weight (kg): modified magnesium aluminum hydrotalcite 25, dibutyltin oxide 11, dimer lanthanum acid 8, Triphenyl phosphite 2, zinc stearate 5, epoxidized soybean oil 3, β-diketone 6, 2,2'-thiobis(4-tert-octylphenoxy)nickel 3, acetyl citrate tri Ethyl ester 13, montan wax 2, attapulgite 14,
[0018] The preparation method is as follows:
[0019] (1) Preparation of modified hydrotalcite:
[0020] a. Add a certain amount of Mg(NO3)2·6H2O and Al(NO3)3·9H2O into water to form a salt solution with a total molar concentration of 0.6mol / L, and add a certain amount of NaOH and Na2CO3 into deionized water to form The total molar concentration is 0.6mol / L alkali solution, drop the alkali solution into the salt solution at a speed of 1-2 drops / s, N 2 Stir vigorously under protection, keep the temperature at 38-42°C, keep the pH value between...
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