Stabilizer special for PVC and preparing method and application of stabilizer

A stabilizer and lubricant technology, applied in the field of PVC material preparation, can solve the problems of reducing the change of color difference of PVC material and so on

Active Publication Date: 2019-08-09
ZHAOQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention adds acrylic polymer to prepare cross-linked hydrotalcite, and uses cross-linked hydrotalcite as a component of synthetic PVC special

Method used

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  • Stabilizer special for PVC and preparing method and application of stabilizer
  • Stabilizer special for PVC and preparing method and application of stabilizer
  • Stabilizer special for PVC and preparing method and application of stabilizer

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[0062] The present invention also provides the preparation method of above-mentioned special stabilizer for PVC, comprising the following steps:

[0063] After mixing fatty acid zinc and polyols, heating to obtain a mixed solution;

[0064] mixing the mixed solution, cross-linked hydrotalcite and lubricant to obtain a mixture;

[0065] The mixture, β-diketone compound and isocyanate are mixed to obtain a special stabilizer for PVC.

[0066] In the invention, fatty acid zinc and polyhydric alcohol are mixed and then heated to obtain a mixed solution.

[0067] In the present invention, the method of mixing fatty acid zinc and polyol is preferably stirring, and the rotating speed of the stirring is preferably 50-1500r / min; the predetermined temperature of the heating is preferably 120-200°C, the heating to The holding time after the predetermined temperature is preferably 0.1-2 hours. The present invention has no special requirements on the heating rate to the predetermined tem...

Embodiment 1

[0077] Weigh 45g of 30% sodium polymethacrylate and fully disperse in 1000mL deionized water to obtain an aqueous solution of sodium polymethacrylate;

[0078] Add 187.6g of aluminum nitrate, adjust the pH to 9.0 with sodium hydroxide at 80°C, stir and reflux for 3 hours to obtain a slurry;

[0079] Add 256.4g of magnesium nitrate and 31.8g of sodium carbonate to the above slurry, mix well, adjust the pH to 11 with sodium hydroxide, crystallize at 160°C for 14h, cool, filter, dry, and pulverize to obtain cross-linked hydrotalcite;

[0080] Fully mix 10 parts of zinc stearate and 10 parts of pentaerythritol, heat to 160°C, and keep it warm for 1.5 hours to obtain a mixed solution;

[0081] Add 60 parts of the cross-linked hydrotalcite prepared above into the above-mentioned mixed solution, add 4 parts of stearic acid after stirring evenly, and continue stirring evenly to obtain a mixture;

[0082] Stir the mixture and lower the temperature. When the temperature reaches 50°C, a...

Embodiment 2

[0084] Weigh 34g of 30% sodium polyacrylate and fully disperse in 1000mL deionized water to obtain an aqueous solution of sodium polyacrylate;

[0085] Add 187.6g of aluminum chloride to the sodium polyacrylate aqueous solution, adjust the pH to 8.5 with potassium hydroxide at 50°C, stir and reflux for 3 hours to obtain a slurry;

[0086] Add 205.1g of magnesium nitrate, 59.5g of zinc nitrate, and 15.2g of sodium carbonate to the above slurry, mix well, adjust the pH to 12 with sodium hydroxide, crystallize at 200°C for 4 hours, cool, filter, dry, and pulverize to obtain Cross-linked hydrotalcite;

[0087] Fully mix 5 parts of zinc stearate and 5 parts of sorbitol evenly, heat to 120°C, and keep it warm for 2 hours to obtain a mixed solution;

[0088] Add 80 parts of the above-mentioned cross-linked hydrotalcite to the above-mentioned mixed solution, stir evenly, add 2 parts of stearic acid, and continue to stir evenly to obtain a mixture;

[0089] Stir the mixture and lower...

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Abstract

The invention provides a stabilizer special for PVC and a preparing method and application of the stabilizer, and belongs to the field of preparation of PVC materials. The stabilizer special for the PVC is prepared from, by mass, 25-80 parts of cross-linking hydrotalcite, 5-30 parts of zinc fatty acid, 5-30 parts of polyhydric alcohols, 1-15 parts of isocyanurate, 1-15 parts of a lubricating agentand 5-25 parts of a beta-diketone compound. A preparing method of the cross-linking hydrotalcite comprises the following steps of mixing an acrylic polymer with an aluminum source, and then adjustingthe pH to obtain slurry; mixing a divalent metal compound with the slurry, then adjusting the pH, and then conducting crystallization to obtain the cross-linking hydrotalcite. As is shown by resultsof the embodiment, the prepared stabilizer is used for preparing the PVC material, the light transmittance reaches 90% or above, the change of chromatic aberration within 120 minutes is only 6.49, andthe coloring problem of the PVC material is solved fundamentally.

Description

technical field [0001] The invention relates to the field of PVC material preparation, in particular to a special stabilizer for PVC and its preparation method and application. Background technique [0002] It is generally believed that the degradation of PVC is the dehydrochlorination reaction of the PVC molecular chain, and the formation of double bonds on the molecular chain accelerates the degradation of PVC. With the progress of the dehydrochlorination reaction, the conjugated double bonds on the PVC molecular chain gradually increase, showing that the color of the PVC material changes, and the color gradually deepens; in addition, the hydrogen chloride released by the degradation of PVC has a catalytic effect on the degradation of PVC, further accelerating PVC. degradation. Therefore, to improve the stability of PVC, generally start from the following two aspects: one is to quickly replace the allyl chloride on the PVC molecular chain, inhibit the growth of conjugated...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K9/04C08K3/26C08K5/098C08K5/053C08K5/07C08K13/06
CPCC08K3/26C08K5/053C08K5/07C08K5/098C08K9/08C08K13/06C08L2201/08C08L2201/10C08L27/06
Inventor 郝向英沈冠华赵闫华袁国栋吴文胜李志伟
Owner ZHAOQING UNIV
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