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Supermolecular interlayer structured ultraviolet light absorbent, its preparation method and uses

A technology of supramolecular intercalation and ultraviolet light, which is applied in the field of supramolecular intercalation structure ultraviolet absorbers and their preparation and application, can solve the problems of reduced elasticity, research on thermal stability of non-intercalated products, and material brittleness, etc. Achieve the effects of improved stability, excellent UV absorption capacity, and improved thermal stability

Inactive Publication Date: 2006-07-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Polyolefins and other polymers are prone to photochemical degradation under ultraviolet radiation, resulting in changes in physical properties, such as reduced elasticity, brittle materials, and eventually loss of mechanical strength, etc.
5-Benzotriazole-4-hydroxy-3-isobutyl-benzenesulfonic acid (5-benzotriazolyl-4-hydroxy-3-sec-butylbenzenesulfonic acid, referred to as BZO) has a strong absorption effect on ultraviolet light, and has a strong absorption effect on 200 Ultraviolet light in the ~400nm band has a strong absorption effect. However, there are very few reports on the research and application of this compound as an ultraviolet absorber in domestic and foreign literature. It can only be applied to the bath dyeing and fixing of wool or textiles or added to pulp. Inhibition of paper yellowing reported
[0004] Literature Qinglin He, Shu Yin, Tsugio Sato, "Synthesis and Photochemical Properties of Zinc-Aluminum Layered Double Hydroxide / Organic UV Ray Absorbing Molecule / Silica Nanocomposites", Journal of Physics and Chemistry of Solids, 65(12), 395-402(2004) report The preparation of 6 kinds of organic ultraviolet absorber intercalation hydrotalcite materials, such as salicylic acid and sodium benzophenone sulfonate, did not involve 5-benzotriazole-4-hydroxy-3-isobutyl-benzenesulfonic acid , there is no research on the thermal stability of any of the six intercalation products, and there is no research on the use of these six intercalation products as UV absorbers for plastic products

Method used

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  • Supermolecular interlayer structured ultraviolet light absorbent, its preparation method and uses
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  • Supermolecular interlayer structured ultraviolet light absorbent, its preparation method and uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step A: 35.7g (0.12mol) of solid Zn(NO 3 ) 2 ·6H 2 O and 22.5g (0.06mol) solid Al(NO 3 ) 3 9H 2 O dissolves in removing CO 2 150ml of mixed salt solution was prepared in deionized water; another 14.4g (0.36mol) of solid NaOH was dissolved in 2 150ml of alkaline solution was prepared in deionized water. The alkali solution and the salt solution were quickly nucleated in a fully back-mixed rotating liquid film reactor at room temperature, and the resulting slurry was crystallized at 100°C for 6h. After centrifugation, the precipitate was washed and the pH value of the washing water was close to 7, and finally dried at 70°C for 24 hours to obtain ZnAl-NO 3 -LDHs, whose Zn 2+ / Al 3+ =2:1.

[0033] ZnAl-NO 3 -LDHs precursors are fully dispersed in CO removal 2 Prepare a 0.10M suspension in deionized water.

[0034] Step B: Dissolve BZO in deCO2 at room temperature 2 Prepare 0.15M aqueous solution in deionized water, add NaOH to adjust pH=7.

[0035] Step C: Ad...

Embodiment 2

[0038] Step A: Prepare hydrotalcite suspension according to Example 1.

[0039] Step B: Dissolving BZO in deCO 2 In deionized water, prepare a 0.10M aqueous solution with a pH of 3.5.

[0040] Step C: Stir rapidly under the protection of nitrogen while adding the BZO solution prepared in step B at a volume ratio of 1:1

[0041] In the suspension prepared in step A, react at room temperature for 10 h, filter, wash until the pH is about 7, and dry at 70° C. for 24 hours to obtain a BZO anion intercalation ultraviolet absorber. The test found that the maximum absorption peak appeared at 357nm, and the absorption rate was 90%.

Embodiment 3

[0043] Prepare hydrotalcite suspension according to Example 1, BZO is dissolved in 2 In deionized water, prepare a 0.15M aqueous solution, and add NaOH to adjust the pH=8. According to the method of Example 1, the precursor suspension and the BZO solution were mixed in a volume ratio of 1:2, reacted at 100°C for 6 hours, filtered, washed until the pH was about 7, and dried at 70°C for 24 hours to obtain BZO anion intercalation ultraviolet absorbent. The test found that the maximum absorption peak appeared at 335nm, and the absorption rate was 91%.

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Abstract

The provided UV absorbent with supermolecular intercalation structure with interlaminar guest as BZO-anion (C16H16N3O4S)-. is prepared by inserting the anion of 5-benzotriazolyl-4- hydroxy-3-sec-butylbenzene sulfonic acid (BZO) into hydrotalcite layers for its intercalation feature. The product has chemical formula as [M2+1-xM3+x(OH)2] (C16H16N3O4S)-x*mH2O, absorptivity in UV band more than 90%, better thermal stability than BZO, and decomposition temperature of the interlaminar material about 450Deg, and can be used as the photoageing-proof additive for light-oxidative degradation resin (such as, polypropylene, polycarbonate and ABS).

Description

technical field [0001] The invention relates to a supramolecular intercalation structure ultraviolet light absorber, a preparation method thereof and an application of the ultraviolet light absorber. Background technique [0002] Polyolefins and other polymers are prone to photochemical degradation under ultraviolet radiation, resulting in changes in physical properties, such as reduced elasticity, brittle materials, and eventually loss of mechanical strength. 5-Benzotriazole-4-hydroxy-3-isobutyl-benzenesulfonic acid (5-benzotriazolyl-4-hydroxy-3-sec-butylbenzenesulfonic acid, referred to as BZO) has a strong absorption effect on ultraviolet light, and has a strong absorption effect on 200 Ultraviolet light in the ~400nm band has a strong absorption effect. However, there are very few reports on the research and application of this compound as an ultraviolet absorber in domestic and foreign literature. It can only be applied to the bath dyeing and fixing of wool or textiles ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08L23/12C08L69/00C08L75/04C08L55/02
CPCC08K5/42
Inventor 段雪李殿卿脱振军
Owner BEIJING UNIV OF CHEM TECH
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