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O-hydroxyl-diphenyl ketone- rare earth complex and its preparation method and uses

A technology of o-hydroxybenzophenone and rare earth complexes, applied in the direction of organic chemistry, can solve the problems of low volatility, increased difficulty in implementing modification technology, and increased cost, and achieve the effect of less blooming phenomenon

Inactive Publication Date: 2006-02-08
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is a pity that they all have their own shortcomings: the light shielding agent has good protective effect and low price, but it has light-shielding properties and is only suitable for opaque materials; At the same time, because it is a pure organic compound, it also has disadvantages such as volatile, blooming, migration, and extraction, which not only affects the durability of its performance, but also causes pollution to the environment; the excited state quencher has high photostability and is volatile. Low resistance, low blooming and migration, and resistance to extraction, but deep color, high toxicity and environmental pollution, will decompose and change color during high temperature processing, and have an antagonistic effect on sulfur-containing additives; free radical scavenger has light color and high photostability, but Because of its alkalinity, it has antagonism with acidic substrates, additives and environmental substances, and like ultraviolet absorbers, because it is a pure organic compound, it also has disadvantages such as volatilization, blooming, migration, extraction, etc.
However, this has further increased the difficulty of implementing these modification technologies, which already involve a relatively complex synthesis process, and increased the cost, and it is difficult to control the stability of product performance.
It may be because of these deficiencies that the comprehensive technical and economic performance improvements achieved by these organic and polymer chemical modifications are not satisfactory in many cases. Therefore, although there are many patents published (according to statistics, between 1977 and 1996, There are more than 1,100 patents on hindered amine light stabilizers), but there are not many achievements in industrialized production and better promotion and application (the more successful ones are several high molecular weight hindered amines, such as Tinuvin 622, Chimassorb944 and CyasorbUV-3346 )

Method used

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  • O-hydroxyl-diphenyl ketone- rare earth complex and its preparation method and uses
  • O-hydroxyl-diphenyl ketone- rare earth complex and its preparation method and uses
  • O-hydroxyl-diphenyl ketone- rare earth complex and its preparation method and uses

Examples

Experimental program
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Effect test

Embodiment 1

[0033] At room temperature, dissolve 13.7g (0.06mol) of 2-hydroxy-4-methoxybenzophenone (UV-9, HMBP) in 300mL of absolute ethanol, add 60mL of 1mol·L -1 Sodium hydroxide (0.06mol) aqueous solution was stirred and mixed for reaction, then, slowly added dropwise 40mL 0.5mol L -1 Samarium Chloride (SmCl 3 , 0.02mol) aqueous solution, continued to stir and react for 1.5 hours. The precipitate generated by the reaction was aged at room temperature for 24 hours and then filtered under reduced pressure. The filter cake was washed with 1:1 ethanol aqueous solution until the filtrate was tested with acidified silver nitrate solution to detect no chloride ions, and then dried at 15°C under normal pressure to constant weight to obtain shallow Yellow powdery product. After analysis and determination, the Sm, C, and H contents of the product are 17.87%, 60.79% and 4.66% respectively, which is the same as the chemical formula Sm(MBP) 3 Consistent (the calculated values ​​of Sm, C, and H ...

Embodiment 2

[0035] According to the synthesis method and conditions of Example 1, the SmCl 3 Sm in is replaced by Pr, Nd, Eu, Tb, Dy, Ho, Er, Tm, Yb respectively, and the composition can be obtained as RE(MBP) 3 (RE stands for Pr, Nd, Eu, Tb, Dy, Ho, Er, Tm or Yb) light yellow powder product.

Embodiment 3

[0037] At room temperature, dissolve 19.6g (0.06mol) of 2-hydroxy-4-n-E-octyloxybenzophenone (UV-531, HOBP) in 300mL of absolute ethanol, add 60mL of 1mol·L -1 Sodium hydroxide (0.06mol) aqueous solution was stirred and mixed for reaction, then, slowly added dropwise 40mL 0.5mol L -1 Samarium Chloride (SmCl 3, 0.02mol) aqueous solution, continued to stir and react for 1.5 hours. The precipitate formed by the reaction was aged at room temperature for 24 hours and then filtered under reduced pressure. The filter cake was washed with 1:1 aqueous ethanol until the filtrate was tested with acidified silver nitrate solution to detect no chloride ions, and then dried at 150°C under normal pressure to constant weight to obtain Pale yellow semi-solid product. After analysis and determination, the Sm, C, and H contents of the product are 13.31%, 67.21%, and 7.30% respectively, which is the same as the chemical formula Sm(OBP) 3 They are consistent (the calculated values ​​of Sm, C, a...

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Abstract

Disclosed is an o-hydroxyl-diphenyl ketone- rare earth complex and its preparation method and uses, which has a chemical formula of REL3-r(OH)x*mH2O, wherein RE is one from Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, or the combination of some of them by any proportion, or the mixed rare earth mainly containing these elements, L is ortho-hydroxyl diphenyl ketone anion, x=0-2, m=0-3. The invention also discloses the use of the complex as organic macromolecular material light-stability agent, which has the advantages of substancial optical stabilization property and improved heat-proof quality.

Description

technical field [0001] The invention relates to an o-hydroxybenzophenone-rare earth complex. [0002] The invention also relates to a preparation method of the o-hydroxybenzophenone-rare earth complex. [0003] The invention also relates to the application of an o-hydroxybenzophenone-rare earth complex. Background technique [0004] Most organic polymer materials, including plastics, chemical fibers, rubber, coatings, paints, adhesives, etc., will undergo photodegradation reactions and age when exposed to sunlight, manifested as discoloration, loss of luster, silver streaks, erosion, and cracks As well as deterioration of appearance and physical and mechanical properties such as tensile strength, impact strength, elongation and electrical properties. Therefore, organic polymer materials used outdoors must be treated with light stabilization, and some polymers that are particularly sensitive to ultraviolet light, such as polypropylene, and even products for indoor applicati...

Claims

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Application Information

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IPC IPC(8): C07C49/76C08K5/07
Inventor 吴茂英
Owner GUANGDONG UNIV OF TECH
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