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Method for preparing low-contraction high-fluidity high-toughness polypropylene

A high-fluidity, high-flow technology, applied in the field of low-shrinkage, high-flow and high-toughness polypropylene compositions, can solve the problems of difficult balance of fluidity, impact resistance and shrinkage rate

Inactive Publication Date: 2008-03-26
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-shrinkage, high-flow, high-toughness polypropylene composition to solve the problem of difficulty in balancing fluidity, impact resistance and shrinkage in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Table 1 Proportion of sample 1

[0031] raw material name

Dosage (weight)

High Flow Polypropylene

35phr

Polypropylene Alloy Hifax

35phr

POE

8phr

Ultrafine Talc Powder 3000

22phr

1010 / 168

0.1 / 0.2phr

770 / 944

0.2 / 0.2phr

Calcium stearate

0.2phr

[0032] Preparation:

[0033] (1) Put polypropylene resin, polypropylene alloy Hifax, 6-8 parts of superfine talc powder, toughening agent, antioxidant, weather resistance agent, and processing aid in a mixer and mix them for 3-8 minutes. obtain the mixture;

[0034] (2) Feed the remaining superfine talc powder and the mixture obtained in step (1) into twin-screw extrusion equipment through a precision metering system, melt and knead at a temperature of 195-215°C, extrude, granulate, and bake dry pack. The specific test results of the obtained products are shown in Table 2

[0035] Table 2 Test results of sample 1

[0036] ...

Embodiment 2

[0038] Table 3 Proportion of sample 2

[0039] raw material name

Dosage (weight)

High Flow Polypropylene

58phr

Polypropylene Alloy Hifax

12phr

SEBS

18phr

Ultrafine Talc Powder

12phr

1010 / 168

0.1 / 0.2phr

770 / 944

0.2 / 0.2phr

Zinc stearate

0.2phr

[0040] Preparation:

[0041] (1) Put polypropylene resin, polypropylene alloy Hifax, toughening agent, antioxidant, weather resistance agent, and processing aid in a mixer and stir and mix for 3-8 minutes to obtain a mixture;

[0042] (2) Send the superfine talc powder and the mixture obtained in step (1) into the twin-screw extrusion equipment through the precision metering system, melt and knead at a temperature of 195-215°C, extrude and granulate, and dry Bag. The specific test results of the obtained products are shown in Table 2

[0043] Table 4 Test results of sample 2

[0044] performance

Embodiment 3

[0046] Table 5 Proportion of sample 3

[0047] raw material name

Dosage (weight)

High Flow Polypropylene

50phr

Polypropylene Alloy Hifax

20phr

POE

13phr

Ultrafine Talc Powder

17phr

1010 / 168

0.1 / 0.2phr

770 / 944

0.2 / 0.2phr

Erucamide

0.2phr

[0048] Preparation:

[0049] (1) Put polypropylene resin, polypropylene alloy Hifax, toughening agent, antioxidant, weather resistance agent, and processing aid in a mixer and stir and mix for 3-8 minutes to obtain a mixture;

[0050] (2) Send the superfine talc powder and the mixture obtained in step (1) into the twin-screw extrusion equipment through the precision metering system, melt and knead at a temperature of 195-215°C, extrude and granulate, and dry Bag. The specific test results of the obtained products are shown in Table 2

[0051] Table 6 Test results of sample 3

[0052] performance

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PUM

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Abstract

The present invention is one kind of low shrinkage high flowability and high toughness polypropylene composition and its preparation process and use. The polypropylene composition consists of high flowability polypropylene 35-65 weight portions, thermoplastic polyolefin elastomer 10-40 weight portions, toughening agent 6-20 weight portions, inorganic stuffing 10-25 weight portions, antioxidant 0.2-1.0 weight portion, weather resisting agent 0.2-1.0 weight portion and machining assistant 0.1-1.0 weight portion. The toughening agent is one or composition of ethylene-octene copolymer, ethylene propylene diene copolymer, styrene-butadiene-styrene block copolymer and hydrogenated styrene-butadiene-styrene block copolymer. The polypropylene composition is prepared through the following steps: 1. mixing all the materials and 0-50 wt% of inorganic stuffing for 3-8 min to obtain mixture; and 2. smelting and mixing the rest inorganic stuffing and mixture at 180-235 deg.c, and pelletizing.

Description

technical field [0001] The invention relates to a method for preparing low-shrinkage, high-flow, high-toughness polypropylene, and relates to a low-shrinkage, high-flow, high-toughness polypropylene composition, its preparation method and application, and the polypropylene composition can be used for automobile bumpers and complex structures. Large thin-walled products with high fluidity and high impact resistance, and at the same time have low shrinkage. technical background [0002] In the automotive industry, there is a continued increase in the use of plastic materials for various automotive components as they reduce weight and improve performance. Compared with other plastic materials, the demand for polyolefin materials is growing rapidly due to its low specific gravity, easy recycling, and cheap price, etc. Among polyolefin resins, polypropylene resins are widely used in automobiles, for example, instrument panels, door panels, pillars, etc. as interior parts, and bu...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K5/524B29B9/12C08L23/08C08L23/16C08L53/02C08K3/34
Inventor 黄达周英辉罗忠富李永华丁超
Owner SHANGHAI KINGFA SCI & TECH
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