Electromagnetic shielding material and preparation method thereof

A technology of electromagnetic shielding materials and antioxidants, applied in the field of conductive plastics, can solve the problems of high volume resistivity and low impact strength, achieve excellent electrical conductivity, good flame retardancy, and improve the effect of electromagnetic shielding

Inactive Publication Date: 2016-04-13
CHANGSHU RES INSTITUE OF NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides an electromagnetic shielding material aiming at the technical problems of electromagnetic shielding effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] The first step: Weigh according to the mass ratio: 100 parts of LDPE; 25 parts of nickel powder; 10 parts of carbon black; 4 parts of polyethylene wax; 15 parts of AC; 2 parts of stearic acid; 30 parts of polyisobutylene; 4 parts of aluminum hydroxide ; CPE 40 parts; EVA 30 parts; sorbitol anhydride laurate 8 parts; DCP 0.02 parts; decabromodiphenyl ether 3 parts; antioxidant DLTP 50 parts; isobutyl triethoxy silane coupling agent 0.1 part; 10 parts of bromocyclododecane.

[0024] The second step: first preheat the carbon black to 70°C, and perform surface treatment with a coupling agent for 40 minutes;

[0025] The third step: add polyisobutylene, AC, EVA and hexabromocyclododecane, stir at 50 ℃ for 30 min, then add sorbitan laurate, DCP and decabromodiphenyl ether, at 60 ℃, rotating speed at 80r Stir for 30min under the condition of / min;

[0026] The fourth step: increase the temperature to 80°C, add the remaining raw materials, mix for 100min, and then ...

Example Embodiment

[0028] Example 2

[0029] The first step: Weigh according to the mass ratio: 100 parts of LDPE; 45 parts of nickel powder; 50 parts of carbon black; 8 parts of polyethylene wax; 35 parts of AC; 6 parts of stearic acid; 50 parts of polyisobutylene; 8 parts of aluminum hydroxide ;CPE80 parts; EVA70 parts; sorbitol anhydride laurate 12 parts; DCP0.08 parts; decabromodiphenyl ether 7 parts; antioxidant DLTP70 parts; isobutyl triethoxysilane coupling agent 2 parts; six 30 parts of bromocyclododecane.

[0030] The second step: first preheat the carbon black to 90°C, and perform surface treatment with a coupling agent for 60 minutes;

[0031] The third step: Add polyisobutylene, AC, EVA and hexabromocyclododecane, stir at 70℃ for 50min, then add sorbitan laurate, DCP and decabromodiphenyl ether, at 80℃, rotating speed at 100r Stir for 50min under the condition of / min;

[0032] The fourth step: heat up to 100°C, add the remaining raw materials, mix for 120min, and then put into the twin-sc...

Example Embodiment

[0034] Example 3

[0035] The first step: Weigh according to the mass ratio: 100 parts of LDPE; 30 parts of nickel powder; 20 parts of carbon black; 5 parts of polyethylene wax; 20 parts of AC; 3 parts of stearic acid; 35 parts of polyisobutylene; 5 parts of antimony trioxide Parts; CPE50 parts; EVA40 parts; 9 parts of sorbitan laurate; 0.04 parts of DCP; 4 parts of decabromodiphenyl ether; 55 parts of antioxidant DLTP; 0.5 parts of NDZ-401 titanate coupling agent; 15 parts of cyclododecane.

[0036] The second step: first preheat the carbon black to 70°C, and perform surface treatment with a coupling agent for 40 minutes;

[0037] The third step: add polyisobutylene, AC, EVA and hexabromocyclododecane, stir at 50 ℃ for 30 min, then add sorbitan laurate, DCP and decabromodiphenyl ether, at 60 ℃, rotating speed at 80r Stir for 30min under the condition of / min;

[0038] The fourth step: increase the temperature to 80°C, add the remaining raw materials, mix for 100min, and then put in...

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PUM

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Abstract

The invention discloses an electromagnetic shielding material and a preparation method thereof. The electromagnetic shielding material comprises, by weight, 100 parts of LDPE, 25-45 parts of nickel powder, 10-50 parts of carbon black, 4-8 parts of polyethylene wax, 15-35 parts of AC, 2-6 parts of stearic acid, 30-50 parts of polyisobutylene, 4-8 parts of a fire retardant, 40-80 parts of CPE, 30-70 parts of EVA, 8-12 parts of sorbitan monolaurate, 0.02-0.08 parts of DCP, 3-7 parts of decabromodiphenyl ether, 50-70 parts of an antioxidant, 0.1-2 parts of a coupling agent and 10-30 parts of hexabromocyclododecane. The electromagnetic shielding effectiveness of the material is 40-80db; the material has the characteristics of good fire resistance, self-extinguishing after being deviated from fire, and no droplets; the volume resistivity is 5-9omega.cm, and the tensile strength is 20-40MPa; and the elongation at break is 300-500%, and the impact strength is 15-35kJ/m<2>.

Description

technical field [0001] The invention relates to the field of conductive plastics, in particular to an electromagnetic shielding material and a preparation method thereof. Background technique [0002] Conductive composite materials currently mainly refer to composite conductive polymer materials, which are composed of polymers and various conductive substances in a certain way. In the process of processing and using ordinary polymer materials, the electrostatic phenomenon is very serious. In some cases, it will not only affect the performance of the material, but even cause harm, such as reducing the electrostatic dust of plastic packaging materials and reducing the quality of products. Value; various plastic products and electronic products used in flammable and explosive environments, spark explosion and combustion caused by static electricity. All of these should use conductive composite materials to improve the electrostatic capacity of the material. [0003] Due to th...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L23/28C08L23/20C08K13/06C08K9/06C08K3/04C08K5/09C08K3/08C08K3/22
CPCC08L23/06C08L2201/02C08L2205/035C08L23/286C08L23/20C08L23/0853C08K13/06C08K9/06C08K3/04C08K5/09C08K2003/0862C08K2003/2227
Inventor 张宇金健
Owner CHANGSHU RES INSTITUE OF NANJING UNIV OF SCI & TECH
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