Modified polypropylene composite material and preparation method of same

A composite material, polypropylene technology, applied in the field of modified polypropylene composite material and its preparation, can solve the problem of inability to meet the use requirements of automotive materials, tensile strength and flexural modulus of polypropylene materials, thermal deformation temperature resistance to humidity and heat aging performance, low scratch resistance and other problems, to achieve the effects of excellent heat and humidity aging resistance, excellent tensile strength and flexural modulus, and excellent heat distortion temperature

Active Publication Date: 2018-05-15
WUHAN JINFA TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polypropylene material prepared by this method has low tensile strength, flexural modulus, heat distortion temperature, damp heat aging resistance, and scratch resistance, which cannot meet the harsh requirements of automotive materials in various complex environments. Requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] Preparation of embodiment 1-6 modified polypropylene composite material and various performance tests:

[0042] According to the ratio in Table 1, dry the polypropylene resin and basalt fiber in an oven at 100°C / 2-4 hours for later use; prepare the polypropylene resin, antioxidant, compatibilizer, scratch-resistant agent and processing aid Put the agent into the mixer and mix evenly; put the mixed material into the extruder, the temperature setting of the extruder: 1 zone 80-120 ℃, 2-5 zone 180-200 ℃, other zones 180-230 ℃, a total of 12 zone; add coupling agent in zone 2-4, side feed chopped basalt fiber in zone 4-6 or main feed untwisted continuous basalt fiber from the exhaust port in zone 6-9; the length-to-diameter ratio of the extrusion screw is 40- 48:1, through kneading, melting, homogenization and extrusion granulation to obtain modified polypropylene composite materials. The performance test results are shown in Table 3.

Embodiment 7-12

[0043] Preparation of embodiment 7-12 modified polypropylene composite material and various performance tests:

[0044] Acetic acid pretreatment: soak the basalt fiber in 2.5mol / L acetic acid aqueous solution for 2 hours, remove, rinse with water, and dry to obtain basalt fiber after acetic acid pretreatment.

[0045]According to the ratio in Table 2, dry the polypropylene resin and acetic acid pretreated basalt fiber in an oven at 100°C / 2-4 hours for later use; combine polypropylene resin, antioxidant, compatibilizer, scratch-resistant Put the agent and processing aid into the mixer and mix evenly; put the mixed material into the extruder, the temperature setting of the extruder: 1 zone 80-120 ℃, 2-5 zone 180-200 ℃, other zones 180-230 ℃, 12 zones in total; add coupling agent in zone 2-4, side feed chopped basalt fiber pretreated by acetic acid in zone 4-6 or main feed untwisted continuous basalt fiber pretreated by acetic acid from exhaust port in zone 6-9 Basalt fiber; the...

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Abstract

The invention discloses a modified polypropylene composite material which includes, by weight, 35-90 parts of polypropylene resin, 8-35 parts of basalt fibers, 0.1-5 parts of a scratch resistant agent, 0.5-5 parts of a coupling agent, and 0.2-5 parts of a compatibilizer. The basalt fibers are selected from at least one of non-twist continuous basalt fibers and short-cut basalt fibers. The non-twist continuous basalt fibers are 1200-2400 tex non-twist continuous basalt fibers and the short-cut basalt fibers are 0.2-10 mm short-cut basalt fibers; preferably, the basalt fibers are pre-treated inacetic acid being 1.0-3.0 mol/L for 1-3 h. The modified polypropylene composite material has low cost, high thermal deformation temperature, good tensile strength, high bending modulus and excellent damp-heat-resistance, anti-aging property and scratch resistance, and can satisfy demands on vehicle-use modified polypropylene composite materials.

Description

technical field [0001] The invention relates to polymer materials and technologies, in particular to a modified polypropylene composite material and a preparation method thereof. Background technique [0002] With the continuous improvement of the demand for lightweight vehicles, polypropylene materials are widely used in automotive parts, including bumpers, dashboards, door panels, columns, etc., due to their low specific gravity, excellent mechanical properties, low cost, and easy processing. Fiber reinforced composites are widely used in aerospace, automobile, sports and other fields due to their excellent mechanical properties. Basalt fiber (BF) is composed of basalt rock (volcanic rock ore) composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, iron oxide and titanium dioxide. The continuous fiber drawn by bushing board at high speed has the same strength as high-strength S glass fiber. It is a new type of inorganic environmental pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L51/06C08L23/08C08K9/04C08K7/10C08K5/134C08K5/526C08K5/20C08K13/06C08K13/04B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704C08L23/14C08L2201/08C08L2205/03C08L51/06C08L23/0869C08K9/04C08K7/10C08K5/1345C08K5/526C08K5/20C08K13/06C08K13/04
Inventor 陈胜杰周英辉程文超余启生陈瑶李禹函王传新熊值
Owner WUHAN JINFA TECH CO LTD
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