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A kind of halogen-free flame-retardant polypropylene foam composite material and preparation method thereof

A flame retardant polypropylene and composite material technology, applied in the field of polymer materials, can solve the problems affecting the dispersion effect of MPP, flame retardant efficiency, poor compatibility, etc., to improve the flame retardant effect of condensed phase, small cell density, foam Pore ​​density and uniform effect

Active Publication Date: 2022-05-27
浙江明江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

However, pentaerythritol polyphosphate melamine salt MPP contains a large number of polar groups, which has poor compatibility with non-polar polypropylene PP, which affects the dispersion effect of MPP in PP and the flame retardant efficiency.

Method used

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  • A kind of halogen-free flame-retardant polypropylene foam composite material and preparation method thereof
  • A kind of halogen-free flame-retardant polypropylene foam composite material and preparation method thereof
  • A kind of halogen-free flame-retardant polypropylene foam composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]According to the preparation process of Comparative Example 1, the mass ratio of PP, MF powder, POE-g-MAH, and MPP in step (1) is 1:0.01:0.05:0.1, that is, 1% melamine resin is added to the formula, and other raw materials The ratio and preparation process remained unchanged, and the PP / POE-g-MAH / MF / MPP flame retardant foamed composite material was obtained.

Embodiment 2

[0039] According to the preparation process of Comparative Example 1, the mass ratio of PP, MF powder, POE-g-MAH, and MPP in step (1) is 1:0.02:0.05:0.1, that is, 2% melamine resin is added to the formula, and other raw materials The ratio and preparation process remained unchanged, and the PP / POE-g-MAH / MF / MPP flame retardant foamed composite material was obtained.

Embodiment 3

[0041] According to the preparation process of Comparative Example 1, the mass ratio of PP, MF powder, POE-g-MAH, and MPP in step (1) is 1:0.03:0.05:0.1, that is, 3% melamine resin is added to the formula, and other raw materials The ratio and preparation process remained unchanged, and the PP / POE-g-MAH / MF / MPP flame retardant foamed composite material was obtained.

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Abstract

The invention relates to the technical field of polymer materials, in particular to a halogen-free flame-retardant polypropylene foam composite material and a preparation method thereof, comprising polypropylene with a mass ratio of raw materials of 100:1-5:5-10:5-20, Melamine resin, maleic anhydride grafted ethylene-octene copolymer, pentaerythritol polyphosphate melamine salt. After the raw materials are mixed, the unfoamed composite material is obtained through melt blending and extrusion granulation; the composite material is mixed with a foaming agent and then injected to obtain the composite material. In the present invention, a large amount of amine groups are utilized in the melamine resin, which reacts with the anhydride groups of POE-g-MAH to generate a cross-linked network structure centered on melamine resin particles, thereby enhancing the melt strength of polypropylene The PP / POE‑g‑MAH / MF / MPP foamed material has high flame retardant efficiency, small and uniform cell density, high strength and high toughness, and has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a halogen-free flame-retardant polypropylene foamed composite material and a preparation method thereof. Background technique [0002] Microcellular foam materials have the advantages of light weight, low heat transfer, good sound insulation and high specific strength. The main varieties are polyurethane, polystyrene and polyolefin foam materials. The polyurethane foaming process will produce harmful isocyanate residues. The waste of expanded polystyrene products does not corrode, resulting in white pollution. PP foam materials can be recycled, have high use temperature, low prices, and excellent comprehensive performance. They are widely used in packaging, construction, and auto parts. [0003] However, polypropylene is a crystalline polymer, and its foaming can only be near the melting point. When the processing temperature is above the melting point, the melt streng...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/06C08L61/28C08K5/3492C08J9/00
CPCC08J9/0061C08J9/0028C08J2323/12C08J2451/06C08J2461/28C08K5/34928
Inventor 杨旭宇金江彬张思灯范开鑫
Owner 浙江明江新材料科技股份有限公司
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