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Preparation process of polypropylene-modified montmorillonite nano composite material

A nano-composite material and a preparation process technology are applied in the field of preparation technology of polypropylene-modified montmorillonite nano-composite materials, and can solve the problems of poor flame retardancy of polypropylene materials, easy depression of thick-walled products, poor dimensional stability and the like, Achieve the effect of enhancing composite stability, excellent mechanical impact resistance, and high dispersibility

Inactive Publication Date: 2018-09-14
HEFEI OAKS NEW BUILDING MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the large shrinkage rate (1% to 2.5%), thick-walled products are easy to sag, and the dimensional stability is poor. For some parts with high dimensional accuracy, it is difficult to meet the requirements, and the flame retardancy of polypropylene itself is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation process of polypropylene-modified montmorillonite nanocomposite material, comprising the following steps:

[0027] (1) Add sodium-based montmorillonite and deionized water into the reaction kettle, stir and mix evenly to form a suspension, add an appropriate amount of surfactant to it, heat up to 65 degrees Celsius, and stir and mix for 7 Hour;

[0028] (2) Filtrate the suspension of step (1) while it is hot, and after cleaning the filter material 3 times with ethanol, put it in a drying box, dry it for 15 hours at 80 degrees Celsius, and send it to a ball mill for ball milling. 1000 mesh sieve to obtain modified montmorillonite;

[0029] (3) Put polypropylene, wood flour and filler into a vacuum oven for drying for 15 hours respectively, and control the moisture content below 1%;

[0030] (4) Add polypropylene, wood powder, filler and modified montmorillonite to the high-speed mixer according to the ratio, control the temperature to 60 degrees Celsius, ...

Embodiment 2

[0040] A preparation process of polypropylene-modified montmorillonite nanocomposite material, comprising the following steps:

[0041] (1) Add sodium-based montmorillonite and deionized water into the reaction kettle, stir and mix evenly to form a suspension, add an appropriate amount of surfactant to it, heat up to 80 degrees Celsius, and stir and mix for 9 Hour;

[0042] (2) Filtrate the suspension of step (1) while it is hot, clean the filter material 5 times with ethanol, put it into a drying box, dry it for 20 hours at 90 degrees Celsius, and send it to a ball mill for ball milling. 1500 mesh sieve to obtain modified montmorillonite;

[0043] (3) Putting polypropylene, wood powder and filler into a vacuum drying oven to dry for 20 hours respectively, and controlling the moisture content below 1%;

[0044] (4) Add polypropylene, wood powder, filler and modified montmorillonite into the high-speed mixer according to the proportion, control the temperature to 70 degrees C...

Embodiment 3

[0054] A preparation process of polypropylene-modified montmorillonite nanocomposite material, comprising the following steps:

[0055] (1) Add sodium-based montmorillonite and deionized water into the reaction kettle, stir and mix evenly to form a suspension, add an appropriate amount of surfactant to it, heat up to 70 degrees Celsius, and stir and mix for 70 minutes at 800 rpm -9 hours;

[0056](2) Filtrate the suspension of step (1) while it is hot, clean the filter material 4 times with ethanol, put it into a drying box, and dry it for 18 hours at 85 degrees Celsius, and send it to a ball mill for ball milling. 1300 mesh sieve to obtain modified montmorillonite;

[0057] (3) Polypropylene, wood powder and filler were put into a vacuum drying oven to dry for 18 hours respectively, and the moisture content was controlled below 1%;

[0058] (4) Add polypropylene, wood powder, filler and modified montmorillonite into the high-speed mixer according to the proportion, control ...

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Abstract

The invention discloses a preparation process of a polypropylene-modified montmorillonite nano composite material, and relates to the field of wood-plastic materials. The preparation process includesthe step of: preparing modified montmorillonite, drying materials, mixing the materials, performing extrusion molding and granulation on the mixed materials and the like. The composite material is prepared by performing mixing and granulation on polypropylene, wood powder, filler, the modified montmorillonite and a silane coupling agent, and has good weather resistance, corrosion resistance, excellent mechanical shock resistance, excellent fatigue resistance and excellent dimensional stability, and the modified montmorillonite has higher dispersibility, so that the composite stability of the material structure is enhanced.

Description

technical field [0001] The invention relates to the field of wood-plastic materials, in particular to a preparation process of a polypropylene-modified montmorillonite nanocomposite material. Background technique [0002] Polypropylene is a non-toxic, odorless, tasteless milky white highly crystalline polymer with a density of only 0.90--"0.91g / cm 3 , is currently one of the lightest varieties of all plastics. It is particularly stable to water, the water absorption rate in water is only 0.01%, and the molecular weight is about 80,000 to 150,000. Good formability, good surface gloss, good mechanical properties and chemical properties. [0003] However, due to the large shrinkage rate (1% to 2.5%), thick-walled products are easy to sag and have poor dimensional stability. For some parts with high dimensional accuracy, it is difficult to meet the requirements, and the flame retardancy of polypropylene itself is poor. [0004] Montmorillonite has strong adsorption capacity a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L97/02C08K13/06C08K9/04C08K3/34C08K3/22C08K7/10C08K3/30C08K3/04C08K5/5419C08K5/548C08K5/544
CPCC08K2003/2241C08K2003/3009C08K2201/011C08L23/12C08L2201/08C08L97/02C08K13/06C08K9/04C08K3/346C08K3/34C08K3/22C08K7/10C08K3/30C08K3/04C08K5/5419C08K5/548C08K5/544
Inventor 曹智远
Owner HEFEI OAKS NEW BUILDING MATERIAL CO LTD
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