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Low after-shrinkage polypropylene composite and preparation method thereof

A composite material and polypropylene technology, which is applied in the field of low post-shrinkage polypropylene composite material and its preparation, can solve the problems of easy shrinkage and the size of parts, and achieve the effects of easy mass production, reduced shrinkage rate and simple process

Inactive Publication Date: 2018-06-12
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polypropylene tends to shrink after processing and forming, which causes problems with the size of the part

Method used

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  • Low after-shrinkage polypropylene composite and preparation method thereof
  • Low after-shrinkage polypropylene composite and preparation method thereof
  • Low after-shrinkage polypropylene composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The first step: Weigh 15 parts of glass fiber powder in high-speed mixer A, then add 0.08 parts of lubricant zinc stearate and 0.12 parts of lubricant ethylene bis stearic acid amide and mix for 20 minutes to obtain mixture A; then take out the mixture 2 / 5 of the total weight of A is reserved; then weigh 10 parts of 8000-mesh glass fiber powder and continue mixing in high-speed mixer A for 20 minutes to obtain mixture B; wherein the speed of high-speed mixer A is 200 rpm, and the temperature is 50°C .

[0035] Step 2: Weigh 60 parts of polypropylene BX3900, 40 parts of polypropylene EP5077, 15 parts of high-density polyethylene, 15 parts of toughening agent POE 8150, 7 parts of toughening agent EM-500A, and 3 parts of toughening agent SEBS G1652 in In high-speed mixer B, add 0.25 parts of nucleating agent HPN-20E and 0.2 parts of coupling agent KH550 and mix for 20 minutes to obtain mixture C; the speed of high-speed mixer B is 200 rpm, and the temperature is 50°C.

[...

Embodiment 2

[0039] The first step: Weigh 45 parts of glass fiber powder in high-speed mixer A, then add 0.21 parts of lubricant zinc stearate and 0.19 parts of lubricant ethylene bis stearic acid amide and mix for 30 minutes to obtain mixture A; then take out the mixture 2 / 5 of the total weight of A is reserved; then weigh 35 parts of 11000-mesh glass fiber powder and continue mixing in high-speed mixer A for 30 minutes to obtain mixture B; wherein the speed of high-speed mixer A is 300 rpm and the temperature is 70°C .

[0040] Step 2: Weigh 58 parts of polypropylene BX3920, 42 parts of polypropylene EP5077, 30 parts of high-density polyethylene, 30 parts of toughening agent POE 8150, 10 parts of toughening agent EM-500A, and 5 parts of toughening agent SEBS G1652 in In high-speed mixer B, add 0.5 parts of nucleating agent HPN-20E and 0.3 parts of coupling agent KH550 and mix for 30 minutes to obtain mixture C; the speed of high-speed mixer B is 300 rpm, and the temperature is 70°C.

[...

Embodiment 3

[0044]The first step: Weigh 21 parts of glass fiber powder in high-speed mixer A, then add 0.09 parts of lubricant zinc stearate and 0.17 parts of lubricant ethylene bis stearic acid amide and mix for 23 minutes to obtain mixture A; then take out the mixture 2 / 5 of the total weight of A is reserved; then weigh 12 parts of 11000-mesh glass fiber powder and continue mixing in high-speed mixer A for 27 minutes to obtain mixture B; wherein the speed of high-speed mixer A is 234 rpm and the temperature is 57°C .

[0045] Step 2: Weigh 43 parts of polypropylene K7760H, 57 parts of polypropylene EP5077, 19 parts of high-density polyethylene, 19 parts of toughening agent POE 8150, 7 parts of toughening agent EM-500A, and 5 parts of toughening agent SEBS G1652 in In high-speed mixer B, add 0.29 parts of nucleating agent HPN-20E and 0.24 parts of coupling agent KH550 and mix for 24 minutes to obtain mixture C; the speed of high-speed mixer B is 209 rpm, and the temperature is 59°C.

[...

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Abstract

The invention discloses a low after-shrinkage polypropylene composite and a preparation method of the composite. The composite is prepared from the following ingredients in parts by weight: polypropylene, high-density polyethylene, glass fiber powder, high-mesh glass fiber powder, a flexibilizer, a nucleator, a lubricant, a coupling agent and an antioxidant. The glass fiber powder is added, fed through a main feed port and a side feed port and compounded with the high-mesh glass fiber powder and high-density polyethylene for use to form the PP (polypropylene) composite with excellent comprehensive performance; at the same time, a shrinkage rate of the PP composite is greatly reduced; and the composite can be used as a bumper in high-end automobiles.

Description

technical field [0001] The invention relates to the field of polymer material modification, in particular to a low-shrinkage polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is widely used due to its low price, easy processing and molding, low density, chemical corrosion resistance and excellent physical and mechanical properties, and it has become one of the fastest-growing general-purpose plastics. However, polypropylene tends to shrink after processing and forming, which causes problems with the size of the part. For automobile bumpers, high dimensional stability is required, that is, the shrinkage of the material is small after 24h to 48h of injection molding, and the post-shrinkage of the material should also be kept small after spraying, coating and other post-processing processes. At present, most automobile OEMs use polypropylene modified materials as PP+EPDM-TD15~TD30 materials. The shrinkage rate o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/06C08L23/08C08L51/04C08L53/02C08K13/04C08K7/14C08K5/098C08K5/20B29C47/92B29C47/60B29C48/92
CPCB29C48/505B29C48/92B29C2948/9258B29C2948/92704C08K2201/003C08K2201/016C08L23/14C08L2205/025C08L2205/035C08L2205/24C08L2207/062C08L23/06C08L23/0815C08L51/04C08L53/025C08K13/04C08K7/14C08K5/098C08K5/20
Inventor 杨桂生杨莺李术姚晨光
Owner HEFEI GENIUS NEW MATERIALS
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