A kind of lightweight polypropylene micro-foaming composite material and preparation method thereof

A composite material, polypropylene technology, applied in the field of polymers, can solve the problems of poor foaming performance, restricting the development of polypropylene micro-foaming materials, cell collapse, etc.

Active Publication Date: 2020-10-30
ORINKO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polypropylene is a semi-crystalline polymer, and its softening point is close to its melting point. After the processing temperature exceeds the melting point, the melt strength drops sharply, and the cell wall cannot withstand the tensile force generated by the gas generated by decomposition, resulting in cell collapse and foaming. Poor performance restricts the development of polypropylene micro-foaming materials in the automotive industry

Method used

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  • A kind of lightweight polypropylene micro-foaming composite material and preparation method thereof
  • A kind of lightweight polypropylene micro-foaming composite material and preparation method thereof
  • A kind of lightweight polypropylene micro-foaming composite material and preparation method thereof

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preparation example Construction

[0032] The present invention also provides a preparation method of lightweight polypropylene microfoam composite material, comprising the following steps:

[0033] (1) After the sepiolite fiber is purified, it is mixed with an anionic surfactant under water-containing conditions, stirred for 24 to 48 hours, and then washed and dried to obtain surface-activated sepiolite fiber;

[0034] (2) stirring the surface-activated sepiolite fiber and the quaternary ammonium intercalation agent at 60-80°C for 24-48 hours under water-containing conditions, and then washing and drying to obtain organically modified sepiolite fiber;

[0035] (3) Put the organically modified sepiolite fiber, copolymerized polypropylene, compatibilizer, antioxidant, lubricant and auxiliary agent into the twin-screw extruder, melt extrude, and granulate to obtain polypropylene composite materials;

[0036] (4) After uniformly mixing the polypropylene composite material and the foaming agent, perform secondary ...

Embodiment 1

[0042] A lightweight polypropylene micro-foaming composite material is made of the following substances in parts by weight:

[0043]

[0044]

[0045] The preparation method of described lightweight polypropylene microfoam composite material, comprises the following steps:

[0046] (1) Add 2 parts by weight of sepiolite fiber to 200mL of 10wt% hydrochloric acid, then stir at 50°C for 48h, then centrifuge and wash to neutral, and vacuum dry at 50°C for 36h to obtain purified sepiolite fiber ;

[0047] (2) Stir the purified sepiolite fiber and 0.2 parts by weight of sodium dodecylsulfonate in 2000 mL of water at 60°C for 24 hours, then centrifugally wash with deionized water for 3 times, and then vacuum-dry at 50°C for 36 hours , to obtain surface-activated sepiolite fibers;

[0048] (3) Stir the surface-activated sepiolite fibers and 0.6 parts by weight of cetyltrimethylammonium bromide in 200 mL of water at 60°C for 24 hours, then centrifugally wash with deionized wate...

Embodiment 2

[0052] A lightweight polypropylene micro-foaming composite material is made of the following substances in parts by weight:

[0053]

[0054]

[0055] The preparation method of described lightweight polypropylene microfoam composite material, comprises the following steps:

[0056] (1) Add 4 parts by weight of sepiolite fiber to 200mL of 10wt% hydrochloric acid, then stir at 60°C for 24h, then centrifuge and wash to neutral, and vacuum dry at 50°C for 36h to obtain purified sepiolite fiber ;

[0057] (2) Stir the purified sepiolite fiber and 0.4 parts by weight of sodium dodecylbenzenesulfonate in 2000 mL of water at 80°C for 48 hours, then centrifugally wash with deionized water for 3 times, and then vacuum-dry at 50°C 36h, obtain the sepiolite fiber of surface activation;

[0058] (3) Stir the surface-activated sepiolite fiber and 1.2 parts by weight of octadecyltrimethylammonium bromide in 200 mL of water at 80°C for 48 hours, then centrifugally wash with deionized ...

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Abstract

The invention relates to the technical field of high polymers and in particular relates to a lightweight polypropylene micro-foamed composite material and a preparation method thereof. The lightweightpolypropylene micro-foamed composite material is prepared from a raw material composition; the raw material composition is prepared from the following components in parts by weight: 89 to 93 parts ofcopolymerized polypropylene, 1 to 3.5 parts of a foaming agent, 2 to 6 parts of sepiolite fiber, 0.2 to 0.6 part of an anionic surfactant, 0.6 to 1.8 parts of a quaternary ammonium salt intercalationagent, 5 to 10 parts of a compatilizer, 0.2 to 0.4 part of an antioxidant, 0.5 to 1 part of a lubricant and 0 to 2 parts of a selective auxiliary agent. According to the lightweight polypropylene micro-foamed composite material, the modified sepiolite fibers are added into polypropylene, so that the mechanical strength of the polypropylene is remarkably increased and a pore diameter of foam poresis thinned; the utilization requirements of manufacturing parts including automobile door plates, air channels, central channels, stand columns and the like can be met, and the lightweight polypropylene micro-foamed composite material has profound significance in automobile weight reduction.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a lightweight polypropylene micro-foaming composite material and a preparation method thereof. Background technique [0002] The fuel consumption index for the fourth stage proposed in the "Energy Saving and New Energy Automobile Industry Development Plan (2012-2020)" is 5L / 100km. Automobile lightweight plays an important role in the national implementation of the "energy saving and emission reduction" strategy. Safety, energy saving and environmental protection have already Become the trend of automobile development. Polypropylene has the advantages of excellent mechanical properties, low price, and easy processing and molding. It is widely used in automobile dashboards, bumpers, door panels, pillars, fenders and other components. 10% or more. Injection foaming technology is an innovative precision injection molding technology. After foaming, the polypropylene material forms ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L51/06C08K13/04C08K7/10C08K5/42C08K5/134C08K5/098C08K5/526C08K5/372C08K3/04C08K5/103C08K5/19C08J9/08
CPCC08J9/08C08J2323/14C08J2451/06C08L23/14C08L2203/14C08L51/06C08K13/04C08K7/10C08K5/42C08K5/1345C08K5/098C08K5/526C08K5/372C08K3/04C08K5/103C08K5/19
Inventor 石阳阳周海李飞夏洋李荣群
Owner ORINKO NEW MATERIAL CO LTD
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