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Electromagnetic shielding coating for heat-shrinkable tube and preparation method thereof

An electromagnetic shielding coating, a practical technology, applied in the direction of conductive coatings, coatings, etc., can solve the problems of resin difficult to adhere firmly, weak boundary layer, low surface energy, etc., and achieve the effect of light weight, firm adhesion and low cost

Active Publication Date: 2017-02-22
JINAN ZHONGZHENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of polyolefin materials such as low surface energy, high crystallinity, non-polarity, and weak boundary layer, it is difficult for general resins to adhere firmly, so ordinary electromagnetic shielding coatings are used for coating polyolefin heat shrinkable tubes. Easy to fall off or wrinkle after heat shrinking

Method used

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  • Electromagnetic shielding coating for heat-shrinkable tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a. Graft modification of thermoplastic elastomer SBS:

[0030] ——Take 200 parts by mass of mixed solvent (the mass ratio of 120# solvent gasoline and toluene is 8:1) in the reactor, heat up to 60°C, and add 100 parts by mass of thermoplastic elastomer SBS (YH-791, S / B is 30 / 70), dissolves completely, obtains solution; Then

[0031] ——Raise the temperature of the dissolving solution to 68°C, add 6 parts by mass of toluene solution containing 10% dibenzoyl peroxide, feed nitrogen, heat up to 78°C, stir, and then mix 0.6 parts by mass of dibenzoyl peroxide with 40 parts by mass of methyl methacrylate and 25 parts by mass of butyl acrylate were mixed and dropped into the reactor for about 20 minutes. After 100 minutes of reaction, 12 parts by mass of dibenzoyl peroxide containing 10% Toluene solution.

[0032] ——Insulation reaction 4h, add 0.3 mass parts polymerization inhibitor hydroquinone, stir again 30min, be down to room temperature, add 0.4 mass parts antioxidant 1...

Embodiment 2

[0036] a. Graft modification of thermoplastic elastomer SBS:

[0037] ——Take 300 parts by mass of mixed solvent (the mass ratio of 120# solvent gasoline and toluene is 2:1) in the reactor, heat up to 50°C, and add 100 parts by mass of thermoplastic elastomer SBS (YH-792, S / B is 40 / 60), dissolves completely, obtains solution; Then

[0038] ——Raise the temperature of the dissolving solution to 75°C, add 4 parts by mass of toluene solution containing 10% dibenzoyl peroxide, feed nitrogen, heat up to 85°C, stir, and then mix 0.4 parts by mass of dibenzoyl peroxide with Mix 55 parts by mass of methyl methacrylate and 10 parts by mass of butyl acrylate and drop them into the reactor for about 40 minutes. After reacting for 80 minutes, add 8 parts by mass of dibenzoyl peroxide containing 10% Toluene solution.

[0039] ——Insulation reaction 3h, add 0.6 mass parts inhibitor hydroquinone, stir again 15min, be down to room temperature, add 0.8 mass parts antioxidant 1010, supplement m...

Embodiment 3

[0043] a. Graft modification of thermoplastic elastomer SBS:

[0044] ——Take 250 parts by mass of mixed solvent (the mass ratio of 120# solvent gasoline and toluene is 5:1) in the reactor, heat up to 55°C, and add 100 parts by mass of thermoplastic elastomer SBS (YH-791, YH- 792 each 50g), dissolve completely, obtain solution; Then

[0045] ——Raise the temperature of the dissolving solution to 70°C, add 5 parts by mass of toluene solution containing 10% dibenzoyl peroxide, feed nitrogen, heat up to 80°C, stir, and then mix 0.5 parts by mass of dibenzoyl peroxide with 48 parts by mass of methyl methacrylate and 18 parts by mass of butyl acrylate were mixed and dropped into the reactor for about 30 minutes. After reacting for 90 minutes, 10 parts by mass of dibenzoyl peroxide containing 10% Toluene solution.

[0046] - heat preservation reaction 3.5h, add 0.4 mass parts polymerization inhibitor hydroquinone, stir again 20min, be down to room temperature, add 0.6 mass parts ant...

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Abstract

The invention provides electromagnetic shielding paint for a heat shrink tubing. The electromagnetic shielding paint is prepared from raw materials in parts by weight as follows: 100 parts of modified thermoplastic elastomer SBS, 45-120 parts of electric conduction powder, 1-3 parts of an anti-settling agent, 0.1-0.3 parts of an antifoaming agent, 0.4-0.8 parts of a coupling agent and 100-300 parts of a mixed solvent, wherein the modified thermoplastic elastomer SBS is one substance with an S / B value of 30 / 70 or an S / B value of 40 / 60 or a mixture of two substances with the S / B value of 30 / 70and the S / B value of 40 / 60; the electric conduction powder is one or more of silver powder, nickel powder, silver-plated copper powder, silver-plated aluminum powder, silver-plated glass beads, silver-plated nickel powder and nickel-plated graphite; the anti-settling agent is at least one of polyethylene wax or polyamide wax; the antifoaming agent is an organosilicon antifoaming agent; the coupling agent is at least one of a titanate coupling agent or a silane coupling agent; and the mixed solvent is prepared by mixing 120# solvent gasoline and methylbenzene at the mass ratio of (8:1)-(2:1).

Description

[0001] Technical field: [0002] The invention belongs to the field of functional materials and relates to electromagnetic shielding material technology, in particular to an electromagnetic shielding coating for heat-shrinkable tubes and a preparation method thereof. [0003] Background technique: [0004] In recent years, with the rapid development of science and technology and the electronic industry, various digital and high-frequency electronic and electrical equipment radiate a large number of electromagnetic waves of different wavelengths and frequencies into the space during work, and the problem of electromagnetic interference caused by electromagnetic waves is becoming more and more serious. Not only It will cause interference and damage to electronic instruments and equipment, affecting their normal work, and the leakage of electromagnetic waves will also endanger national information security and the security of military core secrets. [0005] The transmission cables...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/00C09D7/12C09D5/24C08F287/00C08F220/14C08F220/18
CPCC08F287/00C08L2205/03C09D5/24C09D7/61C09D151/00C08L23/06C08L77/00C08F220/14
Inventor 李昌林
Owner JINAN ZHONGZHENG NEW MATERIAL
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