Flame-retardant physical polypropylene foam composition and preparation method thereof

A polypropylene composition and polypropylene technology are applied in the field of foam compositions, which can solve the problems of unsatisfactory comprehensive performance of signal cable wires, and achieve the effects of high physical heat resistance, stable cell structure, and easy operation.

Pending Publication Date: 2021-08-10
广州敬信高聚物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in one aspect of the present invention is to provide a flame-retardant physical foamed polypropylene composition, which solves the technical problem of unsatisfactory material comprehensive properties used in the preparation of signal cable wires in the prior art, and achieves the goal of improving material comprehensive performance. Technical Effects of Performance

Method used

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  • Flame-retardant physical polypropylene foam composition and preparation method thereof
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  • Flame-retardant physical polypropylene foam composition and preparation method thereof

Examples

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Effect test

preparation example Construction

[0045] The preparation method of the polypropylene foam composition in the specific embodiment of the present invention, comprises the following steps: take the polypropylene of formulation amount, high melt strength polypropylene, high density polyethylene, ethylene-propylene copolymer and siloxane coupling The agent was stirred for 4 minutes in a mixer with a stirring speed of 400r / min; then the foaming agent, antioxidant and lubricant in the formula amount were added, and mixed evenly; then the mixed raw materials were banburyed, melted and blended in an internal mixer, and then Melt, mix and extrude through a single-screw extruder to obtain the product; the temperature of the banburying and melt-blending is 158° C., and the time for banburying and melt-blending is 3 minutes; the screw length-to-diameter ratio of the single-screw extruder is Its ratio of 25:1, the melting and mixing temperature of the single-screw extruder is 140-160°C, and the melting and mixing time of the...

Embodiment

[0047] Examples, comparative examples

[0048] In this embodiment, the components of Comparative Examples 1-12 and Examples 1-2 are detailed in Table 1 below, where the numbers in Table 1 represent mass percentages, such as PP in Comparative Example 1, and the data in the table It is 98.7, which means that in the polypropylene foam composition of Comparative Example 1, PP accounts for 98.7% of the total amount of the polypropylene foam composition.

[0049] Table 1: the formula table of comparative example 1-12, embodiment 1-2

[0050]

[0051]

experiment example

[0053] Get the polypropylene foam composition of embodiment 1-2, comparative example 1-12, then to the performance test of above-mentioned composition, test index comprises density, melt index, tensile strength, elongation at break density, heat distortion temperature and dielectric constant. Among them, density is tested according to ASTM D792 standard, melt index (230°C / 2.16KG) is tested according to ASTM D1238 standard, tensile strength is measured according to ASTM D638-2008 standard, elongation at break is measured according to ASTM D638-2008 standard, heat distortion temperature Measured according to ASTM D638 standard, dielectric constant and dielectric loss (1MHz) are tested according to ASTM 1531; specific test results are shown in Table 2 below:

[0054] Table 2: The performance test data table of the polypropylene foam composition of Examples 1-2 and Comparative Examples 1-12

[0055]

[0056]

[0057] Take the polypropylene foam compositions of Examples 1-4 ...

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Abstract

The invention discloses a flame-retardant physical foaming polypropylene composition, which is prepared from the following components in percentage by weight: 36.5 to 85.6 percent of polypropylene, 10 to 40 percent of high melt strength polypropylene, 1 to 5 percent of a composite flame retardant, 3 to 15 percent of an olefin elastomer, 0.1 to 0.5 percent of a composite nucleating agent, 0.1 to 1 percent of an antioxidant, 0.1 to 1 percent of a silane coupling agent and 0.1 to 1 percent of a lubricant, wherein the polypropylene is polypropylene of other types except the polypropylene with high melt strength. The invention also provides a preparation method of the polypropylene foam composition. The polypropylene foam composition disclosed by the invention has the advantages of uniform foam pores, high physical heat resistance, flame retardance and self-extinguishing.

Description

technical field [0001] The invention relates to the technical field of foam compositions, in particular to a flame-retardant physical polypropylene foam composition, especially a flame-retardant physical polypropylene foam composition and a preparation method thereof. Background technique [0002] In the past, smart electronic communication data lines such as USB 3.0, HDMI and VGA were mostly made of polyethylene foam composition, and the matrix was high-density polyethylene (HDPE) material. For example, Chinese Patent Publication No. CN02135233, the publication date is December 31, 2003, and the name of the invention is polyethylene foam insulation composition for communication cables and its preparation method. The application of this case discloses a polyethylene foam insulation composition for communication cables and preparation method. Its disadvantage is that the high-density polyethylene material is soft after foaming, and it is easy to deform under the increasingly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L27/18C08L23/08C08K13/02C08K5/3492C08K3/32C08K5/01C08K5/5425C08J9/10C08J9/12
CPCC08J9/0014C08J9/0028C08J9/0042C08J9/0061C08J9/0066C08J9/0095C08J9/103C08J9/12C08J2203/04C08J2203/184C08J2323/12C08J2323/14C08J2423/08C08J2427/18C08K3/32C08K5/01C08K5/34928C08K5/5425C08K13/02
Inventor 洪喜军陈娟林伟男
Owner 广州敬信高聚物科技有限公司
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