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Preparation method of modified kaolin reinforced polypropylene material

A polypropylene material and kaolin technology, applied in the field of plastics, can solve the problems of poor low temperature impact toughness of PP, and achieve the effects of enhanced interface adhesion, improved compatibility and improved mechanical properties

Inactive Publication Date: 2016-08-24
林建君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polypropylene (PP) has the characteristics of low price, easy processing, good chemical stability, and excellent mechanical properties, but PP has disadvantages such as poor low-temperature impact toughness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method of the modified kaolin reinforced polypropylene material of embodiment 1 may further comprise the steps:

[0016] S1: Add the silane coupling agent, water, and ethanol into the reactor at a volume ratio of 1:1:18, and perform a hydrolysis reaction at 40° C. for 1 hour to obtain a hydrolyzed solution of the silane coupling agent;

[0017] S2: Under an infrared lamp, add dropwise the silane coupling agent hydrolyzate obtained in S1 while grinding kaolin, grind for 1 hour, then react and dry in an oven at 70°C for 5 hours, wash with ethanol centrifuge three times, and dry at 110°C;

[0018] S3: blend the solid obtained in S2 with isophorone diisocyanate dispersed in acetone, and grind it under an infrared lamp for 1 hour; then dry it in an oven at 70°C for 5 hours, wash it centrifugally with acetone three times, and dry it at 60°C;

[0019] S4: Mix the solid obtained in S3 with octadecylamine and grind it under an infrared lamp for 50 minutes, then d...

Embodiment 2

[0023] The preparation method of the modified kaolin reinforced polypropylene material of embodiment 2 comprises the following steps:

[0024] S1: Add the silane coupling agent, water, and ethanol into the reactor at a volume ratio of 1:1:18, and perform a hydrolysis reaction at 43° C. for 1.5 hours to obtain a hydrolyzed solution of the silane coupling agent;

[0025] S2: Under an infrared lamp, add dropwise the silane coupling agent hydrolyzate obtained in S1 while grinding kaolin, grind for 1 hour, then react and dry in an oven at 70°C for 5 hours, wash with ethanol centrifuge three times, and dry at 110°C;

[0026] S3: blend the solid obtained in S2 with isophorone diisocyanate dispersed in acetone, and grind it under an infrared lamp for 1 hour; then dry it in an oven at 70°C for 5 hours, wash it centrifugally with acetone three times, and dry it at 60°C;

[0027] S4: Mix the solid obtained in S3 with octadecylamine and grind it under an infrared lamp for 50 minutes, then...

Embodiment 3

[0031] The preparation method of the modified kaolin reinforced polypropylene material of embodiment 3 comprises the following steps:

[0032] S1: Add the silane coupling agent, water, and ethanol into the reactor at a volume ratio of 1:1:18, and perform a hydrolysis reaction at 45° C. for 2 hours to obtain a hydrolyzed solution of the silane coupling agent;

[0033] S2: Under an infrared lamp, add dropwise the silane coupling agent hydrolyzate obtained in S1 while grinding kaolin, grind for 1 hour, then react and dry in an oven at 70°C for 5 hours, wash with ethanol centrifuge three times, and dry at 110°C;

[0034] S3: blend the solid obtained in S2 with isophorone diisocyanate dispersed in acetone, and grind it under an infrared lamp for 1 hour; then dry it in an oven at 70°C for 5 hours, wash it centrifugally with acetone three times, and dry it at 60°C;

[0035] S4: Mix the solid obtained in S3 with octadecylamine and grind it under an infrared lamp for 50 minutes, then d...

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PUM

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Abstract

The invention discloses a preparation method of a modified kaolin reinforced polypropylene material. The preparation method comprises the steps of kaolin grafting, kaolin modification, composite material preparation, and the like. The preparation method has the advantages and beneficial effects that by forming a long alkyl chain on the surface of grafted kaolin, the surface of modified kaolin becomes hydrophobic instead of being hydrophilic, so that the compatibility of modified kaolin and a PP matrix is improved and modified kaolin can be uniformly dispersed in the PP matrix; and a long-chain organic matter grafted on the surface of kaolin tangles with a PP long chain to form strong interfacial action, so that the interface adhesion is reinforced and the mechanical properties of the polypropylene material are obviously improved.

Description

technical field [0001] The invention relates to the field of plastics, in particular to a preparation method of a modified kaolin reinforced polypropylene material. Background technique [0002] Kaolin widely exists in clay minerals in nature and is an important chemical raw material. Because of its good plasticity, easy dispersibility, high whiteness, high cohesion and electrical insulation, it is widely used in industries such as rubber, plastics, cement, paper, coatings, and cables. my country's kaolin is rich in reserves and cheap. When used as a polymer filler, due to the difference in polarity, it is easy to agglomerate in the polymer and reduce the performance of the polymer. Therefore, the modification of kaolin has attracted the attention of researchers. Polypropylene (PP) has the characteristics of low price, easy processing, good chemical stability, and excellent mechanical properties, but PP has disadvantages such as poor low-temperature impact toughness. Inorg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/06C08K9/04C08K3/34
Inventor 林建君
Owner 林建君