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Preparation method for anti-radiation ethylene-vinyl acetate copolymer composite material

A technology of vinyl acetate and composite materials, which is applied in textiles, papermaking, and fiber processing, etc., can solve the problems of unreported bonding performance between radiation-proof polymer composite materials and textiles, complex synthesis process, and low shielding efficiency, and achieve Avoid dust flying, good effect, and improve the effect of processing environment

Active Publication Date: 2012-07-18
嘉兴高正新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing methods for preparing radiation-resistant polymer composite materials more or less have the defects of complex synthesis process, harsh reaction conditions, and low shielding efficiency, and the bonding performance of radiation-resistant polymer composite materials and textiles has never been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The first step is to dissolve 1g of γ-methacryloxypropyltrimethoxysilane in 15g of water, then add 100g of lead monoxide, stir fully on a high-speed mixer at 1800r / min for 10min, and put the mixed material into Place it in an oven at 100°C for 4 hours, take it out and cool it naturally to obtain a surface-modified lead salt.

[0034] In the second step, the 50g lead salt of the above-mentioned surface modification, ethylene-vinyl acetate copolymer (VA content is 30%) 100g, antioxidant N, N'-bis[3-(3,5-di-tert-butyl Add 0.1 g of 4-hydroxyphenyl)propionyl]hydrazine into a high-speed mixer, and mix for 5 minutes at a stirring speed of 2400r / min. The masterbatch obtained by kneading is extruded into pellets at 130° C., and then injected into an injection molding machine at 150° C. to obtain an ethylene-vinyl acetate copolymer composite material with radiation protection performance. Its X-ray shielding efficiency is 40%, the tensile strength is 18.7MPa, the elongation at b...

Embodiment 2

[0036] In the first step, dissolve 5g of butyl titanate in a mixture of 25g of water and 25g of ethanol, then add 100g of lead dioxide, fully stir on a high-speed mixer at 300r / min for 20min, and put the mixed material at 140°C Place it in an oven for 1 hour, take it out and let it cool naturally to obtain a surface-modified lead salt.

[0037]Second step, the 100g lead salt of above-mentioned surface modification, ethylene-vinyl acetate copolymer (VA content is 25%) 100g, liquid paraffin 15g, antioxidant pentaerythritol diphosphite bis(2,4-ditertbutyl 1 g of phenyl) ester and 1 g of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate were added into a high-speed mixer, and mixed for 30 minute. The masterbatch obtained by kneading is added to an open mill at 70°C and mixed into sheets, and then molded at 120°C to obtain an ethylene-vinyl acetate copolymer composite material with radiation protection properties. Its X-ray shielding efficiency is 64%, its tensile strength is 16MPa...

Embodiment 3

[0039] In the first step, dissolve 9.0g of zirconium isopropoxide in 90.0g of isopropanol and 45.0g of ethanol, then add 300g of lead oxalate, fully stir on a high-speed mixer at 3000r / min for 3min, and put the mixed material at 120°C Place in an oven for 2 hours, take out and cool naturally to obtain surface-modified lead salt.

[0040] Second step, the 250g lead salt of above-mentioned surface modification, 100g ethylene-vinyl acetate copolymer (VA content is 15%), 10g tributyl citrate, 10g maleic anhydride, 1g dicumyl peroxide, 1 g of 2,2'-methylenebis(4-methyl-6-tert-butylphenol) was added into a high-speed mixer, and mixed for 30 minutes at a stirring speed of 1000 r / min. The masterbatch obtained by kneading is added to an open mill at 70°C, mixed uniformly, and then molded at 110°C for 300 seconds to obtain an ethylene-vinyl acetate copolymer composite material with radiation protection properties. Its X-ray shielding efficiency is 75%, its tensile strength is 14MPa, it...

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Abstract

The invention relates to a preparation method for an anti-radiation ethylene-vinyl acetate copolymer composite material. The steps comprises: weighing 100 parts of lead salt, 1-5 parts of coupling agent and 15-50 parts of solvent by weight, wherein the solvent is one or more of water and ester organic solvents, dissolving the coupling agent into the solvent, then adding the solution into the lead salt, stirring and evenly mixing the solution, activating the solution at constant temperature to obtain surface modified lead salt; and weighing 100 parts of ethylene-vinyl acetate copolymer, 50-250 parts of surface modified lead salt, 0-10 parts of polar monomer, 0-1 parts of initiator, 0.1-2 parts of antioxygen and 0-15 parts of lubricating agent, stirring and evenly mixing the mixture, fusing and compositing the mixture to obtain the composite material. The anti-radiation ethylene-vinyl acetate copolymer composite material prepared through the method of fusing forming processing can serve as an anti-radiation coating or gel film to be used in textile and to be formed into clothes and cord fabric and the like with the anti-radiation function, and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a radiation-proof ethylene-vinyl acetate copolymer composite material. Background technique [0002] Ethylene-vinyl acetate copolymer is widely used because of its excellent processability, strong bonding ability, good flexibility in a wide temperature range, impact strength, environmental stress cracking resistance and good optical properties. With the advancement of science and technology in industries such as machinery, chemical industry, electrical appliances, transportation and construction, people have more and more researches on radiation protection materials, and the application range of radiation protection materials is becoming wider and wider. In addition to being used as personal protective clothing, anti-radiation materials have also been widely used in medical clinics, nuclear power plants, construction and detection instruments an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K13/06C08K9/06C08K9/04C08K3/22C08K3/30C08K5/098C08F255/02D06M15/333D06M11/46D06M11/53D06M13/188D06M13/192
Inventor 罗宇钱天悦戚嵘嵘胡新利陆佳琦王新灵
Owner 嘉兴高正新材料科技股份有限公司
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