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A kind of pvc stabilizer with thermal and light stability and preparation method thereof

A heat stabilizer and light stabilizer technology, applied in the direction of organic chemistry, can solve the problems of product color change, mechanical property decline, molecular chain breakage, etc., and achieve the effect of convenient operation, improved heat and light stability, and easy control of conditions

Active Publication Date: 2019-03-29
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Ultraviolet rays are the main reason for the aging of polyvinyl chloride materials. Although ultraviolet rays only account for about 5% of sunlight, their energy is large enough to destroy the chemical bonds in the polyvinyl chloride chain, causing the molecular chain to break and crosslink, causing its The mechanical properties are reduced, and the color of the product will also change

Method used

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  • A kind of pvc stabilizer with thermal and light stability and preparation method thereof
  • A kind of pvc stabilizer with thermal and light stability and preparation method thereof
  • A kind of pvc stabilizer with thermal and light stability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 8.88g (0.06mol) of phthalic anhydride into a 150ml three-neck flask, add an appropriate amount of solvent, equip with a stirring bar and a thermometer, and place it in a water bath. 8 g (0.05 mol) of 2,2,6,6-tetramethyl-4-piperidinol was added in batches within 20 min to 30 min, and the temperature was continuously raised to 50° C., followed by a constant temperature reaction for 1 h. The layers were allowed to stand, filtered, and finally vacuum-dried at 70°C. A white solid powder was obtained, which was monotetramethylpiperidinol phthalate.

[0035] Add 1g (3.3mmol) monotetramethylpiperidinol phthalate, 0.132g (3.3mmol) sodium hydroxide and 10ml methanol solution in a 100ml single-necked flask, add a magnetic sub-flask, and at room temperature, make o-phthalic acid Monotetramethylpiperidinol dicarboxylate is dissolved in methanol by reaction with sodium hydroxide. After the dissolution is complete, add 0.183g (1.65mmol) of calcium chloride, react for 1h, filte...

Embodiment 2

[0037] Add 0.915g (3mmol) of monotetramethylpiperidinol phthalate obtained in Example 1 in a 100ml single-necked flask, then add 0.12g (3mmol) sodium hydroxide and 15ml tetrahydrofuran solution, add magnetic sub-stir , At room temperature, slowly add deionized water to make monotetramethylpiperidinol phthalate react with sodium hydroxide and dissolve in a mixed solvent of tetrahydrofuran and water. After complete dissolution, add 0.37g (1 mmol) heptahydrate and lanthanum chloride, react for 1 hour, filter, and dry to obtain a white solid, which is monotetramethylpiperidinol phthalate lanthanum salt.

Embodiment 3

[0039]In a 100ml single-necked flask, add 1.22g (4mmol) of monotetramethylpiperidinyl phthalate obtained in Example 1, then add 0.16g (4mmol) sodium hydroxide and 15ml tetrahydrofuran solution, add a magnet and stir , At room temperature, slowly add deionized water to make monotetramethylpiperidinol phthalate react with sodium hydroxide and dissolve in a mixed solvent of tetrahydrofuran and water. After the dissolution is complete, add 0.37g (1 mmol) heptahydrate and cerium chloride, react for 1h, filter, and dry to obtain a yellow solid, which is monotetramethylpiperidinol phthalate cerium salt.

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Abstract

The invention relates to a PVC stabilizer with good heat and light stability, and a preparation method thereof, and belongs to the technical field of PVC plastic assistants. The chemical structural formula of the PVC stabilizer is shown in the description; and in the formula, R is a carboxylic group, R1 is an organic acid radical, x is the valence of the R1, m is 0, 1, 2, 3, 4..., mx is less than n, M is a metal, and n is the valence of the metal. The preparation method comprises the following steps: carrying out an esterifying reaction on a phenyl diacid compound and 2,2,6,6-tetramethyl-4-piperidinol to generate a phenyl diacid ester of mono(tetramethylpiperidine), reacting the phenyl diacid ester of mono(tetramethylpiperidine) with the R1 acid and sodium hydroxide to generate a sodium salt, adding metal salt, and carrying out a metathesis reaction to obtain the target stabilizer, or directly reacting the phenyl diacid ester of mono(tetramethylpiperidine) with metal hydroxide or metal oxide at a high temperature to obtain the target stabilizer. The PVC stabilizer has good heat stability and good light stability, and the preparation method has the advantages of simplicity, easiness in condition control, good reappearance, and good development potential and application prospect.

Description

technical field [0001] The invention belongs to the technical field of PVC plastic additives, and in particular relates to a PVC stabilizer with thermal stability and light stability and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is the first general-purpose resin material in China and the second in the world. Its output is second only to polyethylene (PE). It has flame retardancy, chemical corrosion resistance and electrical insulation, but thermal stability and light resistance Relatively poor, limiting the scope of use of polyvinyl chloride products. Therefore, improving the thermal stability and light stability of polyvinyl chloride is particularly important for the development of polyvinyl chloride industry. [0003] Due to its own structural defects, polyvinyl chloride is extremely sensitive to heat. During the heating process, hydrogen chloride will be released to produce a conjugated polyene structure with a color-producing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/3435C07D211/46C08L27/06
CPCC07D211/46C08K5/3435C08L2201/08C08L27/06
Inventor 程斌蒋国赛袁俊孙文武王爽
Owner BEIJING UNIV OF CHEM TECH
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