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High-melt-strength polypropylene micro-foaming material and preparation method thereof

A technology of high melt strength and polypropylene, which is applied in the field of polymer materials, can solve the problems affecting the mechanical properties of foam materials, the decrease of melt strength, and the collapse of cells, so as to promote stability, improve melt strength, and foam Dense and delicate effect

Inactive Publication Date: 2018-05-22
ORINKO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polypropylene is a highly crystalline polymer. Once the processing temperature is higher than the melting point, the melt strength will drop sharply, and it is difficult for the melt to support cell growth, resulting in cell collapse and rupture.
In the process of stress, the unevenly distributed cells will become the origin of cracks and affect the mechanical properties of foamed materials

Method used

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  • High-melt-strength polypropylene micro-foaming material and preparation method thereof
  • High-melt-strength polypropylene micro-foaming material and preparation method thereof
  • High-melt-strength polypropylene micro-foaming material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The polypropylene micro-foaming material with high melt strength in this embodiment is composed of 98wt% polypropylene composite material and 2wt% chemical blowing agent;

[0023] The polypropylene composite material is prepared from the following raw materials in parts by weight:

[0024]

[0025] Concrete preparation method comprises the following steps:

[0026] (1) 76 parts of copolymerized polypropylene, 10 parts of sodium ion type ethylene-methacrylic acid ionomer, 10 parts of talcum powder, 2 parts of compatibilizer, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168, 0.5 parts of calcium stearate were mixed in a high-speed mixer for 10 minutes, then put into a co-rotating twin-screw extruder, melted and extruded, and granulated to obtain a polypropylene composite material; wherein the extrusion temperature of the extruder was 180- 200°C, the screw speed is 350-400r / min, and the vacuum degree is -0.06—-0.08MPa.

[0027] (2) After mixing evenly the pol...

Embodiment 2

[0029] The polypropylene micro-foaming material with high melt strength in this embodiment is composed of 97wt% polypropylene composite material and 3wt% chemical blowing agent;

[0030] The polypropylene composite material is prepared from the following raw materials in parts by weight:

[0031]

[0032] Concrete preparation method comprises the following steps:

[0033] (1) 61 parts of copolymerized polypropylene, 15 parts of ethylene-methacrylic acid ionomer, 20 parts of talcum powder, 4 parts of compatibilizer, 0.1 part of antioxidant 1010, 0.1 part of antioxidant 168, and 1 part of PE wax Parts are mixed in a high-speed mixer for 10 minutes, then put into a co-rotating twin-screw extruder, melted and extruded, and granulated to obtain a polypropylene composite material; the extrusion temperature of the extruder is 180-200 ° C, the screw speed It is 350-400r / min, and the vacuum degree is -0.06—-0.08MPa.

[0034] (2) After mixing evenly the polypropylene composite mate...

Embodiment 3

[0036] The polypropylene micro-foaming material with high melt strength in this embodiment is composed of 97wt% polypropylene composite material and 3wt% chemical blowing agent;

[0037] The polypropylene composite material is prepared from the following raw materials in parts by weight:

[0038]

[0039] Concrete preparation method comprises the following steps:

[0040] (1) 54 parts of copolymerized polypropylene, 20 parts of lithium-ion type ethylene-methacrylic acid ionomer, 20 parts of talcum powder, 6 parts of compatibilizer, 0.15 part of antioxidant 1010, 0.15 part of antioxidant 168, 1 part of calcium stearate, 0.5 part of ultraviolet light absorber, 0.5 part of light stabilizer, and 1 part of coloring agent were mixed in a high-speed mixer for 10 minutes, then put into a co-rotating twin-screw extruder, melted and extruded, granulated, The polypropylene composite material is obtained; the extrusion temperature of the extruder is 180-200°C, the screw speed is 350-4...

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Abstract

The invention provides a high-melt-strength polypropylene micro-foaming material and a preparation method thereof. The polypropylene micro-foaming material comprises a polypropylene composite materialand a chemical foaming agent, wherein the polypropylene composite material comprises co-polypropylene, talcum powder, a vinyl-methacrylate ionic bond polymer, a compatilizer, an antioxidant, a lubricating agent and other auxiliaries; the vinyl-methacrylate ionic bond polymer is subjected to blend to modify polypropylene; maleic anhydride grafted polypropylene is treated as an interface compatibilizer for improving the interface bonding force of polypropylene and the vinyl-methacrylate ionic bond polymer, and the vinyl-methacrylate ionic bond polymer is promoted to be uniformly dispersed in apolypropylene substrate, and thus the melt strength of polypropylene can be effectively improved, and the micro-foaming material with dense cells can be obtained. The polypropylene micro-foaming material is low in density, high in mechanical strength, low in low-temperature toughness, high in scraping resistance, capable of being directly injected to realize foaming, and simple in processes; and an effective light-weight material is provided for realizing light weight of automobiles.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polypropylene micro-foaming material with high melt strength and a preparation method thereof. Background technique [0002] With the continuous deepening of the concept of energy saving and environmental protection, safety, comfort, light weight, and energy saving have become the main trends in the future development of automobiles. Lightweight automobiles play a vital role in reducing fuel consumption and reducing emissions. Studies have shown that every 100% reduction in automobile weight kg, the fuel consumption per 100 kilometers can be reduced from 0.3 liters to 0.6 liters. Replacing steel with plastic has become the most realistic choice for lightweight, energy-saving and emission-reducing vehicles. Polypropylene is widely used in the automotive industry due to its light weight, low price, excellent mechanical properties, heat resistance, and corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/08C08L51/06C08K13/02C08K3/34C08K5/134C08K5/372C08K5/526C08J9/08
CPCC08J9/08C08J2203/02C08J2323/14C08J2423/08C08J2451/06C08K3/34C08K5/1345C08K5/372C08K5/526C08K13/02
Inventor 石阳阳周海李飞夏洋李荣群
Owner ORINKO NEW MATERIAL CO LTD
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