High weather-proof, multiple-effect, environmentally-friendly PVC composite heat stabilizer and preparation method thereof
A composite heat stabilizer, high weather resistance technology, applied in chemical instruments and methods, inorganic chemistry, oxygen/ozone/oxide/hydroxide, etc. The effect of improving thermal stability and reducing cost
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Embodiment 1
[0032] Prepare 2×10 -3 mol / l sodium oleate aqueous solution (solution A), weigh 98.59g MgSO 4 ·7H 2 O and 66.64gAl 2 (SO 4 ) 3 18H 2 O was dissolved in 500ml deionized water to make Mg 2+ and Al 3+ According to the mixed solution (solution B) of 2:1 molar ratio, 48.00g NaOH and 10.60g Na 2 CO 3 Dissolve in 500ml deionized water to make OH - / CO 3 2- A mixed solution with a molar ratio of 12:1 (Solution C). Take 500ml of solution A and put it into a 2L three-necked flask, heat it in a water bath to 40-60°C, under the condition of vigorous stirring, add 500ml of solution B and 500ml of solution C dropwise at the same time, and the dropping speed should be completed within 45min. During the dropwise addition, the pH value of the solution was kept at 9.0-9.5. Continue to stir for 30 minutes after the dropwise addition, then increase the temperature of the water bath to 60-80°C for 3 hours, cool to room temperature naturally, repeat suction filtration, and wash the pre...
Embodiment 2
[0040] According to the preparation steps of Example 1, weigh 147.89g MgSO 4 ·7H 2 O and 66.64g Al 2 (SO 4 ) 3 18H 2 O was dissolved in 500ml deionized water to make Mg 2+ and Al 3+ According to the mixed solution (solution B) with a molar ratio of 3:1, mix 64.00g NaOH with 10.60g NaOH 2 CO 3 Dissolve in 500ml deionized water to make OH - / CO 3 2- A mixed solution with a molar ratio of 16:1 (Solution C). According to the steps of the above method, the hydrophobic nano-hydrotalcite with a magnesium-aluminum molar ratio of 3:1 is prepared. The particle size of the prepared hydrotalcite is 30-70nm.
[0041] A hyperdispersant was prepared according to Example 1, and the mass ratio of maleic anhydride, sodium propylene sulfonate and polyethylene glycol monoacrylate in the hyperdispersant was 50:35:15.
[0042] The prepared hydrotalcite, hyperdispersant are mixed with calcium stearate, zinc stearate, lubricant, surface modifier and auxiliary heat stabilizer, and the spe...
Embodiment 4~5
[0049] Use hydrophobic nano-hydrotalcite with Mg / Al molar ratio of 2:1, change the composition and ratio of the composite heat stabilizer, add it to 100 parts of PVC in the same amount, and then add 60 parts of diisooctyl phthalate (DOP ), and then according to the national standard GB2113-82 "Plastic whiteness test method", the prepared three kinds of PVC plastics are subjected to heat-resistant whiteness test, Table 2 is the composition formula of three kinds of composite heat stabilizers, and Table 3 is to put the test piece on The relative whiteness value tested in the whiteness meter tested with a standard whiteness board with a whiteness of 85%. It can be found from Table 3 that the prepared hydrophobic nano-hydrotalcite composite stabilizer has excellent thermal stability compared with traditional stabilizers.
[0050] Table 2
[0051] Reality
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Hydrophobic Nano
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hyperdispersant
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