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High-modulus low-shrinkage low-filling polypropylene composite material

A technology of low shrinkage and composite materials, applied in the field of polymer materials, can solve the problems of reduced impact strength, high hardness and modulus, and low shrinkage, and achieve the effects of low shrinkage, high modulus, and low cost

Inactive Publication Date: 2013-04-17
SUZHOU RUNJIA ENGINEER PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the above-mentioned defects in the prior art, the present invention provides a high modulus, low shrinkage and low filling polypropylene composite material and its preparation method, the method disperses and contacts nanomaterials in the polypropylene material well, nano The advantages of the material are well utilized. The polypropylene composite material not only has the advantages of high hardness, high modulus and low shrinkage brought by ordinary fillers, but also overcomes the shortcomings of decreased impact strength and increased density, and obtains a high modulus The low-filling polypropylene composite material with high volume and low shrinkage greatly broadens the application range of polypropylene materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] A preparation method of high modulus, low shrinkage and low filling polypropylene composite material, comprising the following steps:

[0041](1) Modified nanofiller masterbatch: In the solution, swell the nanofiller organized with stearyl ammonium salt with maleic anhydride and a small amount of auxiliary swelling agent; the swollen organic nanofiller is mixed with powdered High-fluidity polypropylene and an appropriate amount of initiator are melted and reacted in a mixer, so that the nano-filler and grafted polypropylene are fully dispersed and contacted, and a polypropylene / nano-filled grafted intercalation blend is obtained, which is the improved Non-toxic nano filler masterbatch;

[0042] (2) Weigh the raw materials according to the weight ratio;

[0043] (3) Dry-mix polypropylene, modified nanofiller masterbatch, toughener, heat stabilizer DSTP, antioxidant 1010, and antioxidant 168 in a high-speed mixer for 3-5 minutes;

[0044] (4) Put the mixed raw materials...

Embodiment 1

[0047] First, prepare the modified montmorillonite masterbatch, the specific steps are: swell the montmorillonite organized with octadecyl ammonium salt in solution with maleic anhydride and a small amount of auxiliary swelling agent; the organic montmorillonite after swelling Soil and powdered high-fluidity polypropylene weight ratio of 85:15, 0.5% initiator in the mixer for melting reaction, so that montmorillonite and grafted polypropylene fully dispersed and contacted to obtain a polypropylene / Montmorillonite graft intercalation blend, that is, modified nano-montmorillonite masterbatch.

[0048] Then prepare materials according to the group distribution ratio in the following table:

[0049] Types of name Content (parts) Polypropylene Blends of homo- and copolymer polypropylenes with different flow properties 68 Modified montmorillonite masterbatch Polypropylene / montmorillonite graft intercalation blend 6 Toughener POE8842 25 Ther...

Embodiment 2

[0052] Prepare materials according to the group distribution ratio in the following table:

[0053] Types of name Content (parts) Polypropylene Blends of homo- and copolymer polypropylenes with different flow properties 74 Modified montmorillonite masterbatch Polypropylene / montmorillonite graft intercalation blend 6 Toughener POE8842 19 Thermal Oxygen Stabilizer DSTP octadecyl thiodipropionate 0.5 Antioxidant 1010 Tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester 0.3 Thermal Oxygen Stabilizer 168 Tris(2,4-di-tert-butylphenyl)phosphite 0.2

[0054] Dry mix the above materials in a high-speed mixer for 3-5 minutes, then melt and extrude them in a twin-screw extruder, and granulate. Zone 200~210℃, Zone 4 210~215℃, Zone 5 210~215, Zone 6 210~215, Zone 7 215~225, Zone 8 215~225, Zone 9 215~225, Zone 10 215~225; stay The time is 1-2 minutes, and the pressure is 12-18MPa.

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Abstract

The invention discloses a high-modulus low-shrinkage low-filling polypropylene composite material. The composite material comprises the following materials in parts by weight: 68-97 parts of polypropylene, 2-10 parts of modified filler master batch, 0.1-1.0 part of heat stabilizer DSTP (Disteaxyl Thiodipropionate), 0.1-1.0 part of antioxidant 1010, and 0.1-0.5 part of antioxidant 168. The preparation method for the high-modulus low-shrinkage low-filling polypropylene composite material comprises the following steps of: (1), preparing modified nanometer filler master batch; (2), weighing the materials in parts by weight; (3), carrying out dry-mixing on the polypropylene, the modified nanometer filler master batch, a flexibilizer, the heat stabilizer DSTP, the antioxidant 1010 and the antioxidant 168 in a high-speed mixer for 3-5 minutes; and (4), putting the mixed materials to a double-screw compressor for fusing, extruding and pelleting. The composite material has the advantages of small usage amount of the filling material, high modulus and low shrinkage; and the process for preparing the polypropylene composite material is simple and low in cost.

Description

technical field [0001] The invention relates to a polymer material, more specifically, to a high-modulus, low-shrinkage and low-filling polypropylene composite material. Background technique [0002] As a new type of artificial material, plastic has been widely used in all walks of life of the national economy and people's lives. Usually the raw materials for the production of plastic products are pure resins, such as PE, PP, ABS, etc., which are directly processed and formed. With the acceleration of the industrial application of polymer materials and composite materials, various industrial sectors continue to put forward higher requirements, such as higher tensile strength, modulus, thermal conductivity, thermal distortion temperature, lower thermal expansion and cost, etc. , pure resin seems powerless. Adding various non-metallic and metal powder fillers to pure resin can improve various properties of plastic resin and make it meet the required technical indicators and ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/16C08L23/08C08L51/06C08K13/06C08K3/34C08K3/04C08K3/22C08K3/30C08F255/02C08J3/22B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/926
Inventor 翁永华汪理文丁贤麟
Owner SUZHOU RUNJIA ENGINEER PLASTIC
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