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Preparation method of ultraviolet light stabilizer

A technology of stabilizer and ultraviolet light, which is applied in the field of preparation of ultraviolet light stabilizers, can solve the problems of large specific surface area of ​​inorganic nanoparticles, difficulty in uniform dispersion of inorganic particles, poor interface compatibility, etc., to improve light and oxygen aging resistance, Enhanced toughness and improved dispersibility

Inactive Publication Date: 2009-02-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large specific surface area and high surface energy of inorganic nanoparticles, agglomeration between particles is very easy to occur, and the interface compatibility between inorganic nanoparticles and polymer matrix is ​​poor, and it is difficult for inorganic particles to disperse uniformly in the polymer matrix. Can't achieve the expected purpose

Method used

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  • Preparation method of ultraviolet light stabilizer
  • Preparation method of ultraviolet light stabilizer
  • Preparation method of ultraviolet light stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh nano TiO 2 10 grams of particles, 0.1 grams of vinyltriethoxysilane coupling agent, and 90 grams of 95 wt% ethanol were added to a three-necked bottle with a stirrer, a thermometer and a reflux condenser, and the temperature was raised to 40° C., stirred for 0.5 hours, and the Dry to obtain modified nano-TiO 2 particles; the modified nano-TiO 2 After stirring 1 gram of particles and 40 grams of dodecyl ammonium chloride solution with a concentration of 0.5 wt%, they were dispersed under ultrasonic waves for 3 minutes, ultrasonic frequency: 19KHz, power: 50W, and then the mixed solution was added to the In the three-necked bottle of the thermometer and the reflux condenser, under nitrogen protection, add 5 grams of potassium persulfate solution with a concentration of 3 wt % at a temperature of 50 ° C, and continuously drop 54 grams of methyl methacrylate monomer, and the monomer has been added dropwise. Continue to react for 1 hour, cool down and discharge, filt...

Embodiment 2

[0035] Weigh nano TiO 2 15 grams of particles, 1.5 grams of vinyltrimethoxysilane coupling agent, and 85 grams of 95wt% ethanol were added to a three-necked bottle with a stirrer, a thermometer and a reflux condenser, heated to 50°C, stirred for 3 hours, and dried Get modified nano-TiO 2 particles; the modified nano-TiO 2 5 grams of particles and 50 grams of sodium lauryl sulfate solution with a concentration of 1.5wt% are stirred evenly, and dispersed under ultrasonic waves for 5 minutes, ultrasonic frequency: 20KHz, power: 150W, and then the mixed solution is added to the And in the three-necked bottle of reflux condenser, nitrogen protection, adding concentration is 8 grams of the ammonium persulfate solution of 2wt% when temperature is 70 ℃, drips the mixed monomer 37 grams of methyl methacrylate and butyl acrylate continuously, Continue to react for 1.5 hours after the addition of the monomer, cool down and discharge, filter, and dry to obtain the UV light stabilizer - ...

Embodiment 3

[0037] Weigh nano TiO 2 30 grams of particles, 3 grams of methacryloxypropyl trimethoxy coupling agent, 70 grams of 95wt% ethanol, add in a three-necked bottle with a stirrer, thermometer and reflux condenser, heat up to 70 ° C, stir After 6 hours, the modified nano-TiO was obtained by drying 2 particles; the modified nano-TiO 2 After mixing 20 grams of particles and 60 grams of sodium dodecylbenzenesulfonate solution with a concentration of 3wt%, they were dispersed under ultrasonic waves for 10 minutes, ultrasonic frequency: 21KHz, power: 250W, and then the mixed solution was added to the In the three-necked flask of the thermometer and the reflux condenser, under nitrogen protection, 10 grams of cumene hydrogen peroxide solution with a concentration of 0.5 wt % was added at a temperature of 80 ° C, and 10 grams of ethyl acrylate monomer was continuously added dropwise. Continue to react for 2 hours after the addition is completed, cool down and discharge, filter, and dry ...

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Abstract

This invention relates to a preparation of ultraviolet light stability agent, its characteristic is that after 1-20 weight shares of nanometer TiO2 particle that surface modified by coupling agent and 40-60 weight shares of emulsifying agent solution of which density is 0.5-3wt% are mixed uniformly, disperse 3-10 minutes in supersonic wave(frequency: 19-21KHz,power: 50-250W), then the mixed liquor is added into three-necked bottle that has agitator, thermometer and reflux condenset, it is protected by nitrogen gas, add 5-10 weight shares of initiator solution of which density is 0.5-3wt% when the temperature is 50-80DEG C, continuously dropwise 10-54 weight shares of acrylics monomer, after monomer has been dropwised they react 1-2 hours, reduce the temperature to release materials, filter, obtain ultraviolet light stabilizer-polyacrylic ester / complex particle of nanometer TiO2 by drying. This ultraviolet light stabilizer and giant molecule material are mixed, ageing effect is accelerated by ultraviolet light, the test result indicates that it raises the bearing ultraviolet light stabilizer of this giant molecule material, meanwhile it raises mechanic function.

Description

technical field [0001] The invention relates to a preparation method of an ultraviolet light stabilizer, which belongs to the field of polymer material modification. Background technique [0002] Polymer materials have rich sources of raw materials, low density, excellent mechanical, electrical and optical properties, corrosion resistance, easy molding and processing, and are widely used in many different occasions. Due to its own structural characteristics, polymer materials also expose some shortcomings during use, among which the most prominent is easy aging. When polymer materials are used outdoors, they will more or less undergo photo-oxidative aging under sunlight and ultraviolet radiation, resulting in structural damage, performance degradation, and even loss of function. In order to prolong the service life of polymer materials, many scholars have been devoting themselves to research in this area. There are two main methods for photostabilizing polymer materials. O...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/10C08L33/06C08L59/02C08L69/00C08L27/06C08K3/22C08F2/44C08F4/32
Inventor 杨明娇淡宜唐明静江龙陈山玉
Owner SICHUAN UNIV