Light stabilizer for weather-resistant polyvinyl chloride (PVC) material, and preparation method and application thereof

A technology of polyvinyl chloride and light stabilizer, which is applied in the direction of organic chemistry, can solve the problems of limiting the scope of use of polyvinyl chloride, poor light resistance, etc., achieve improved thermal stability, less environmental and human hazards, and realize industrial production Effect

Inactive Publication Date: 2019-09-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Polyvinyl chloride (PVC) has flame retardancy, chemical corrosion resistance and electrical insulation, but its light resistance is relatively poor, which limits the scope of use of PVC products

Method used

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  • Light stabilizer for weather-resistant polyvinyl chloride (PVC) material, and preparation method and application thereof
  • Light stabilizer for weather-resistant polyvinyl chloride (PVC) material, and preparation method and application thereof
  • Light stabilizer for weather-resistant polyvinyl chloride (PVC) material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: Weigh 1.845g (0.01mol) of cyanuric chloride and 4.42g (0.032mol) of potassium carbonate into a 100ml three-neck flask, add an appropriate amount of tetrahydrofuran solvent to dissolve, heat up to 65°C under magnetic stirring, and dissolve 6.82g in 20ml of tetrahydrofuran (0.032mol) 2,2,6,6-methylpiperidine-4-n-propyl alcohol and the dropping funnel, drop it slowly within 30min, react at a constant temperature of 70°C for 6h, wait for the reaction solution to cool to room temperature, The crude product was obtained by suction filtration, washed several times with hot water at 80°C, and dried in an oven at 60°C overnight. The target product 2,4,6-tris[2-(2,2,6,6-tetramethylpiperidine)-propoxy]-1,3,5-triazine was obtained.

[0034] According to the thermogravimetric analysis, the decomposition temperature of the target product 2,4,6-tris[2-(2,2,6,6-tetramethylpiperidine)-propoxy]-1,3,5-triazine is 280°C, which is much higher than the processing of PVC in the prese...

Embodiment 2

[0044] Step 1: Weigh 1.845g (0.01mol) of cyanuric chloride and 4.55g (0.033mol) of potassium carbonate in a 100ml three-neck flask, add an appropriate amount of tetrahydrofuran solvent to dissolve, heat up to 70°C under magnetic stirring, and dissolve 7.27g in 25ml of tetrahydrofuran (0.032mol) 2,2,6,6-methylpiperidine-4-n-butyl alcohol and the dropping funnel, drop it slowly within 20min, react at a constant temperature of 80°C for 7h, wait for the reaction solution to cool to room temperature, The crude product was obtained by suction filtration, washed several times with hot water at 80°C, and dried in an oven at 60°C overnight. The target product 2,4,6-tris[2-(2,2,6,6-tetramethylpiperidine)-butoxy]-1,3,5-triazine was obtained.

[0045] MS: m / z=686.5

[0046] Elemental analysis: C, 69.93%; H, 10.86%; N, 12.23%; O, 6.99%

[0047] Step 2: Tin methyl mercaptide, rare earth stabilizer xt-1 (Shandong Youso Chemical Technology Co., Ltd.), calcium zinc stabilizer G-30 (Guangzhou...

Embodiment 3

[0050] Step 1: Weigh 1.845g (0.01mol) of cyanuric chloride and 4.42g (0.032mol) of potassium carbonate into a 100ml three-neck flask, add an appropriate amount of tetrahydrofuran solvent to dissolve, heat up to 70°C under magnetic stirring, and dissolve 8.2g in 20ml of tetrahydrofuran (0.034mol) 2,2,6,6-methylpiperidine-4-n-pentyl alcohol and the dropping funnel, slowly drop it within 30min, react at a constant temperature of 80°C for 8h, and wait for the reaction solution to cool to room temperature, The crude product was obtained by suction filtration, washed several times with hot water at 80°C, and dried in an oven at 60°C overnight. The target product 2,4,6-tris[2-(2,2,6,6-tetramethylpiperidine)-pentyloxy]-1,3,5-triazine was obtained.

[0051] MS: m / z=700.5

[0052] Elemental analysis: C, 70.24%; H, 10.93%; N, 11.99%; O, 6.85%

[0053] Step 2: Tin methyl mercaptide, rare earth stabilizer xt-1 (Shandong Youso Chemical Technology Co., Ltd.), calcium zinc stabilizer G-30 (...

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Abstract

The invention discloses a light stabilizer for a weather-resistant PVC material, and a preparation method and application thereof. The preparation method for the light stabilizer comprises the following steps: sequentially adding cyanuric chloride, 2,2,6,6-tetramethyl pipradrol compound and potassium carbonate into a tetrahydrofuran solution in a nitrogen atmosphere, and performing stirring under reflux; and cooling reaction liquid to room temperature, performing suction filtration to obtain a crude product, washing the crude product with hot water a plurality of times, and performing drying so as to obtain the light stabilizer for the weather-resistant polyvinyl chloride material. According to the light stabilizer of the invention, a triazine structure and a piperidine structure are combined together, so the light stabilizer absorbs ultraviolet light while capturing free radicals generated during the photodegradation process of PVC, thereby greatly improving the weather resistance of the PVC material; a heat stabilizer system of the invention has the stability mechanisms of three different heat stabilizers; the preparation method is simple; and after the heat stabilizer is added into the PVC material, the thermal stability of the PVC material is greatly improved.

Description

technical field [0001] The invention relates to a light stabilizer, in particular to a light stabilizer for weather-resistant polyvinyl chloride materials and a preparation method and application thereof, belonging to the field of PVC materials. Background technique [0002] Polyvinyl chloride (PVC) has flame retardancy, chemical corrosion resistance and electrical insulation, but its light resistance is relatively poor, which limits the application range of PVC products. Therefore, improving the light stability of polyvinyl chloride is particularly important for the development of polyvinyl chloride industry. Ultraviolet light is the main reason for the aging of PVC materials. Due to its own structural defects, PVC chains are broken and crosslinked under ultraviolet light, resulting in a decline in its mechanical properties and a change in the color of the product. . [0003] At present, the most commonly used and most effective treatment measure is to add light stabilize...

Claims

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Application Information

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IPC IPC(8): C08K5/3492C07D401/14C08L27/06C08K5/00C08K5/58C08J5/18
CPCC07D401/14C08J5/18C08J2327/06C08K5/005C08K5/34926C08K5/58
Inventor 胡俊峰刘平周到户
Owner SOUTH CHINA UNIV OF TECH
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