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Organic-inorganic composite optothermal stabilizer, polyvinyl chloride prepared by using same and preparation method thereof

A photothermal stabilizer and inorganic composite technology, applied in the field of polymers, can solve the problems of compatibility of volatile organic substrates, low photostabilization efficiency, poor thermal stability, etc., and achieve enhanced photoprotection efficiency and long-term stability. The effect of improving, improving compatibility

Active Publication Date: 2011-09-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an organic-inorganic composite photothermal stabilizer and preparation method with strong operability, low preparation cost and excellent comprehensive performance. The easy migration of the agent, poor extraction resistance, easy volatilization, poor compatibility with organic substrates, low light stabilization efficiency, poor thermal stability, etc., greatly improve the anti-ultraviolet aging performance and thermal processing stability of the product

Method used

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  • Organic-inorganic composite optothermal stabilizer, polyvinyl chloride prepared by using same and preparation method thereof
  • Organic-inorganic composite optothermal stabilizer, polyvinyl chloride prepared by using same and preparation method thereof
  • Organic-inorganic composite optothermal stabilizer, polyvinyl chloride prepared by using same and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The natural hydrotalcite (LDH) was calcined at about 300°C for about 8 hours. Weigh 5 phr of the calcined product and 5 phr of 2-hydroxy-4-methoxy-5-sulfonic acid benzophenone (BP-4) into 20 phr of water. Stir well, react at about 80°C for about 40 hours, filter, wash and dry the product to obtain an organic-inorganic composite, and fully mix the composite with 0.2% titanate coupling agent by weight of the composite. Suspend the coupled organic-inorganic composite and 0.5% free radical scavenger by weight of the composite in water, apply ultrasonic irradiation for about 10 minutes, the frequency of ultrasonic is 20kHz, according to the material 200kW / m 3After irradiating and ultrasonic treatment, the product is filtered, washed and dried to obtain the desired organic-inorganic composite photothermal stabilizer. Recorded as organic-inorganic composite photothermal stabilizer I.

Embodiment 2

[0033] The artificial hydrotalcite (LDH) is calcined at about 600°C for about 3 hours. Weigh 5phr of the calcined product and 10phr of 2-hydroxy-4-methoxy-5-sulfonic acid benzophenone (BP-4) into 25phr of water. Stir well, react at about 100°C for about 10 hours, filter, wash and dry the product to obtain an organic-inorganic compound. The compound was thoroughly mixed with 3% titanate coupling agent and silane coupling agent (mass ratio 1:1). Suspend the coupled organic-inorganic compound and 5% free radical scavenger in ethanol, apply ultrasonic irradiation for about 20 minutes, the frequency of ultrasonic is 20kHz, according to the material 100kW / m 3 After irradiating and ultrasonic treatment, the product is filtered, washed and dried to obtain the desired organic-inorganic composite photothermal stabilizer. Recorded as organic-inorganic composite photothermal stabilizer II.

Embodiment 3

[0035] The natural hydrotalcite (LDH) is calcined at about 800°C for about 3 hours. Weigh 10phr of the calcined product and 2phr of 2-hydroxy-4-methoxy-5-sulfonic acid benzophenone (BP-4) into 25phr of water. Stir well, react at about 50°C for about 50 hours, filter, wash and dry the product to obtain an organic-inorganic compound. Mix this compound well with 5% silane coupling agent. Suspend the coupled organic-inorganic compound and 10% free radical scavenger in water, apply ultrasonic irradiation for about 30 minutes, the frequency of ultrasonic is 20kHz, according to the material 50kW / m 3 After irradiation and ultrasonic treatment, the product is filtered, washed and dried to obtain the desired organic-inorganic composite photothermal stabilizer. Recorded as organic-inorganic composite photothermal stabilizer III.

[0036] The examples and test results of the polyvinyl chloride containing the photothermal stabilizer provided by the present invention are given below.

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Abstract

The invention discloses an organic-inorganic composite optothermal stabilizer, a preparation method thereof and the application thereof in polyvinyl chloride. Main components of the organic-inorganic composite optothermal stabilizer include 2-hydroxyl-4-methoxyl-5-sulfoacid-benzophenone (BP-4), hydrotalcite (LDH), coupling agent and radical trapper. The preparation method of the optothermal stabilizer is as follows: firstly, proportionally putting the BP-4 and the LDH after roasting pretreatment into a reactor; adding water for preparing an aqueous solution; carrying out anion exchange reaction so as to obtain an organic-inorganic composite; and then, carrying out coupling and ultrasonic treatment on the composite so as to obtain the organic-inorganic composite optothermal stabilizer. A polyvinyl chloride product containing the stabilizer has greatly-improved photostability and obviously-improved hot workability.

Description

technical field [0001] The invention relates to the technical field of polymers, more specifically to a light and heat stabilizer for polyvinyl chloride, as well as a preparation method and application of the light and heat stabilizer. technical background [0002] Polyvinyl chloride (PVC) materials are prone to photodegradation under ultraviolet light, which leads to changes in their physical and chemical properties, such as darker color, brittle material and chalky surface, etc., and eventually loses its use value. The conventional method of anti-ultraviolet aging of polymer materials is to add a certain amount of organic ultraviolet light stabilizers, such as phenyl salicylate, o-hydroxybenzophenone, o-hydroxytriazoles and triazines, to the material body. Although these light stabilizers have a certain protective effect on polymers, their absorption of ultraviolet light is still not ideal. It has a small molecular weight, is easily soluble in water, and is easy to migrat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K13/06C08K5/42C08K3/34C08K5/3435C08L27/06C08K3/32C08K3/30
Inventor 郭少云张晓飞皮红赵天宝陈跃
Owner SICHUAN UNIV
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