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Highly filled low-density polypropylene composite material and preparation method thereof

A composite material and polypropylene technology, which is applied in the field of high-filling and low-density polypropylene composite materials and its preparation, can solve the problem of high density, the inability to effectively reduce the density of high-filling polypropylene materials, and the easy entry of polypropylene molecular chains into micropores Internal and other problems, to achieve the effect of reducing material weight, good rigidity and toughness, and excellent mechanical properties

Active Publication Date: 2017-05-24
重庆会通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the high density of traditional high-content talcum powder filled polypropylene materials. During the melting process of micropores in mesoporous materials, polypropylene molecular chains are easy to enter into the micropores, which cannot effectively reduce the density of high-filled polypropylene materials. Density defects, providing a high-filling low-density polypropylene composite material and its preparation method

Method used

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  • Highly filled low-density polypropylene composite material and preparation method thereof
  • Highly filled low-density polypropylene composite material and preparation method thereof
  • Highly filled low-density polypropylene composite material and preparation method thereof

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Effect test

Embodiment 1

[0027] The high-filling low-density polypropylene composite material in the present embodiment is made up of following raw materials by weight:

[0028]

[0029]

[0030] Concrete preparation method comprises the following steps:

[0031] (1) Preparation of modified diatomite: in 1m 3 Add 0.7m to the volumetric reactor 3 Purified water, adding excess sodium bicarbonate to make a saturated solution, adding 1% citric acid in the amount of sodium bicarbonate to the saturated sodium bicarbonate solution, stirring for 10 minutes, then adding diatomaceous earth, heating at 80°C and stirring for 2 hours, centrifuging, and The centrifuged product was placed in a vacuum drying oven at 80°C for 4 hours, and the dried product was crushed and ground to obtain modified diatomite;

[0032] (2) 20 parts of modified diatomite prepared in step (1), 50 parts of block copolymerized polypropylene, 10 parts of talcum powder, 20 parts of POE elastomer, 0.1 part of antioxidant 1010, 0.1 part...

Embodiment 2

[0034] The high-filling low-density polypropylene composite material in the present embodiment is made up of following raw materials by weight:

[0035]

[0036]

[0037] Concrete preparation method comprises the following steps:

[0038] (1) Preparation of modified calcium silicate: in 1m 3 Add 0.7m to the volumetric reactor 3 Pure water, add excess sodium bicarbonate to make a saturated solution, add sodium bicarbonate 1% citric acid to the saturated sodium bicarbonate solution, stir for 10 minutes, then add calcium silicate, heat at 80°C and stir for 2 hours, centrifuge, and The centrifuged product was placed in a vacuum drying oven at 80°C for 4 hours, and the dried product was crushed and ground to obtain modified calcium silicate;

[0039] (2) 10 parts of modified calcium silicate prepared in step (1), 35 parts of random copolymerized polypropylene, 40 parts of homopolypropylene, 5 parts of calcium carbonate, 10 parts of POE elastomer, 0.2 part of antioxidant 101...

Embodiment 3

[0041] The high-filling low-density polypropylene composite material in the present embodiment is made up of following raw materials by weight:

[0042]

[0043]

[0044] Concrete preparation method comprises the following steps:

[0045] (1) Preparation of modified zeolite powder: in 1m 3 Add 0.7m to the volumetric reactor 3Pure water, add excess sodium bicarbonate to make a saturated solution, add sodium bicarbonate 1% citric acid to the saturated sodium bicarbonate solution, stir for 10 minutes, then add zeolite powder, heat at 80°C and stir for 2 hours, centrifuge, and centrifuge The product was placed in a vacuum drying oven at 80°C for 4 hours, and the dried product was crushed and ground to obtain modified zeolite powder;

[0046] (2) 15 parts of modified zeolite powder prepared by step (1), 65 parts of block copolymerized polypropylene, 5 parts of barium sulfate, 15 parts of POE elastomer, 0.15 part of antioxidant 1010, 0.15 part of antioxidant 168, After putt...

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Abstract

The invention discloses a highly filled low-density polypropylene composite material and a preparation method of the highly filled low-density polypropylene composite material, wherein the highly filled low-density polypropylene composite material comprises the following raw materials in parts by weight: 50 to 75 parts of polypropylene, 5 to 10 parts of inorganic fillers, 10 to 20 parts of modified micro-mesoporous minerals, 10 to 20 parts of toughening agents, 0.2 to 0.4 part of an antioxidant, 0.5 to 1 part of a lubricant and 0 to 3 parts of other additives. According to the invention, sodium bicarbonate and citric acid are compounded to process opening micro-mesoporous minerals so as to replace a part of mineral filling; the modified micro-mesoporous minerals are heated to be decomposed in the process of injection moulding, so as to produce a large number of cells of which the sizes are several microns to tens of microns; the cells are adhered to channel surfaces with high specific surface energy inside the minerals; gases occupy micro-mesoporous channels, so that a matrix melt is unlikely to enter for filling. The method effectively reduces the density and weight of highly filled polypropylene, and performance and comprehensive properties of the highly filled polypropylene are not lost; and the material is endowed with good mechanical properties, and further has the functions of sound insulation, noise reduction and the like, and can be widely used in automotive interior materials.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a high-filling and low-density polypropylene composite material and a preparation method thereof. Background technique [0002] Lightweight, energy saving and environmental protection have become the development trend of automotive materials. The proportion of non-metallic materials mainly modified plastics in automobiles is constantly increasing. Modified plastic injection molded parts with low density and high filling as the modification direction have become a reality. One of the main ways to reduce the weight of automobiles; polypropylene is widely used in automobile exterior decoration because of its excellent mechanical properties and good processability. Filled polypropylene materials mainly use talcum powder to improve the high rigidity, heat resistance, and dimensional stability of the material, and rubber to increase the toughness and endow the material with a...

Claims

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Application Information

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IPC IPC(8): C08L53/00C08L23/12C08L23/14C08L23/08C08K13/06C08K9/10C08K9/04C08K9/02C08K7/26C08K3/34C08K3/26C08K3/30B29B9/06B29C47/92B29C48/92
CPCB29B9/06B29C48/92B29C2948/9258B29C2948/92704C08L23/12C08L53/00C08L2205/03C08L2205/035C08L2207/14C08L23/0815C08K13/06C08K9/10C08K9/04C08K9/02C08K7/26C08K3/34C08L23/14C08K2003/265C08K2003/3045
Inventor 石阳阳周海闫溥李荣群
Owner 重庆会通科技有限公司
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