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Flame-retardant wave-absorbing polypropylene foamed bead and preparation method thereof

A technology for foaming beads and polypropylene, applied in the field of polypropylene foaming beads, can solve the problems of high flame retardancy, high wave absorption performance, single function, etc. at the same time, and achieve excellent electromagnetic shielding performance, treatment The effect of good effect and excellent dispersibility

Active Publication Date: 2021-10-01
JIANGSU HAOSHENG PLASTIC IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing polypropylene foam beads have a single function, and it is difficult to meet high flame retardancy and high wave absorption performance at the same time.

Method used

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  • Flame-retardant wave-absorbing polypropylene foamed bead and preparation method thereof
  • Flame-retardant wave-absorbing polypropylene foamed bead and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The invention provides a flame-retardant and wave-absorbing polypropylene foamed bead, which comprises the following raw materials in parts by weight: 60 parts of flame-retardant modified polypropylene, 20 parts of composite conductive filler, 1 part of modified foaming nucleating agent, 1 part of dispersant and 1 part of antioxidant, described composite conductive filler comprises the raw material of following mass percent: conductive carbon black 45%, carbon nanotube 15%, silver-plated conductive glass fiber 18%, mica 19% and coupling agent 3%.

[0026] In a preferred embodiment, the dispersant is polyethylene glycol, the antioxidant is one of antioxidant 1010, antioxidant 300, and antioxidant 168, and the conductive carbon black is HG-4 conductive carbon black, the mica is flake mica powder, and the coupling agent is a silane coupling agent.

[0027] The present invention also provides a method for preparing flame-retardant and wave-absorbing polypropylene foam bead...

Embodiment 2

[0038] The difference from Example 1 is that the present invention provides a flame-retardant and wave-absorbing polypropylene foamed bead. In a preferred embodiment, the following raw materials are included in parts by weight: 70 parts of flame-retardant modified polypropylene , 30 parts of composite conductive fillers, 2 parts of modified foaming nucleating agents, 2 parts of dispersants and 2 parts of antioxidants, the composite conductive fillers include the following raw materials in mass percentages: 45% of conductive carbon black, 15 parts of carbon nanotubes %, silver-plated conductive glass fiber 18%, mica 19% and coupling agent 3%.

Embodiment 3

[0040] Different from Examples 1-2, the present invention provides a flame-retardant and wave-absorbing polypropylene foamed bead, including the following raw materials in parts by weight: 80 parts of flame-retardant modified polypropylene, 40 parts of composite conductive filler , 3 parts of modified foaming nucleating agents, 3 parts of dispersants and 3 parts of antioxidants, the composite conductive fillers include the following raw materials in mass percentages: 45% of conductive carbon black, 15% of carbon nanotubes, silver-plated conductive glass 18% fiber, 19% mica and 3% coupling agent.

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Abstract

The invention discloses a flame-retardant and wave-absorbing polypropylene foamed bead, and particularly relates to the technical field of polypropylene foamed beads. The flame-retardant and wave-absorbing polypropylene foamed bead comprises the following raw materials: flame-retardant modified polypropylene, a composite conductive filler, a modified foaming nucleating agent, a dispersant and an antioxidant; the composite conductive filler comprises the following raw materials: conductive carbon black, carbon nanotubes, silver-plated conductive glass fibers, mica and a coupling agent. By adding the silver-plated conductive glass fiber, the conductivity of the polypropylene foamed bead can be effectively improved, and the silver-plated conductive glass fiber has excellent electromagnetic shielding performance; by mixing the flame-retardant modified polypropylene, the composite conductive filler and the modified foaming nucleating agent, a stable conductive flame-retardant network can be formed in the polypropylene foamed bead, the conductivity of the polypropylene foamed bead is greatly improved, and the polypropylene foamed bead has good reflectivity to microwaves and better wave-absorbing effect.

Description

technical field [0001] The invention relates to the technical field of polypropylene foam beads, more specifically, the invention relates to a flame-retardant and wave-absorbing polypropylene foam beads and a preparation method thereof. Background technique [0002] Polypropylene expanded bead (EPP) products have excellent mechanical properties, high dimensional accuracy, and are easy to degrade and recycle, and are gradually replacing traditional polyethylene (PE), polystyrene (PS) and polyurethane (PU) foaming Materials are used in more and more fields. In addition to electronic packaging, transportation and auto parts industries, some functionalized EPP materials are gradually applied to their special fields, such as semi-conductive EPP materials used to absorb microwaves. [0003] Most of the foaming materials used in the field of microwave absorption are PU foams with conductive fillers adsorbed inside. Since PU foams have an open-pore structure, the adsorbed conductive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08J9/00C08L23/12C08L23/00C08K3/04C08K9/10C08K9/02C08K7/14C08K3/34C08K3/22C08K3/32C08G83/00
CPCC08J9/122C08J9/0061C08J9/0095C08G83/001C08J2323/12C08J2423/00C08K3/04C08K3/041C08K9/10C08K9/02C08K7/14C08K3/34C08K2003/2224C08K2003/321C08K2201/001Y02P20/10
Inventor 陈奕镔
Owner JIANGSU HAOSHENG PLASTIC IND TECH CO LTD