Polypropylene composition and preparation method thereof

A technology of polypropylene composition and polypropylene resin, which is applied in the field of polypropylene composition and its preparation, can solve problems such as high processing temperature, pitting on the surface of the material, and reduce gloss, and achieve good mechanical properties, increase toughness, and reduce gloss Effect

Inactive Publication Date: 2019-03-22
GUANGDONG ALDEX NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 102807703 A discloses a method of reducing the gloss of polypropylene by using nitrile powder rubber and maleic anhydride grafted polypropylene. This method can reduce the gloss of polypropylene to a certain extent, but the reduction is limited. The smell of rubber and maleic anhydride is strong, which will affect the comfort and cannot meet the requirements very well
Chinese patent CN 105647001 A discloses a method of reducing the gloss of polypropylene by grafting ethylene-octene copolymer with maleic anhydride. This method can reduce the gloss while adding no or less toughening agent, and the gloss of the material will decrease. It is obvious, but still not satisfactory and needs to be further reduced, and there is also an odor problem
Chinese patent CN102532774 A discloses a method for reducing the gloss of polypropylene by using a styrene-acrylonitrile cross-linked copolymer. This styrene-acrylonitrile cross-linked copolymer is a commercially available product in the United States (trade name is Blendex BMAT). The method can effectively reduce the gloss of polypropylene, but the styrene-acrylonitrile copolymer is incompatible with polypropylene, the processing temperature is relatively high, and the cost is high
Chinese patent CN 107541002 A discloses a method of using cross-linked polyethylene to reduce the gloss of polypropylene. This method can greatly reduce the gloss of polypropylene. However, polyethylene is uncontrollable during the cross-linking process and is prone to excessive gelation. It is not easy to disperse in polypropylene, causing defects such as pitting and bright spots on the surface of the material
The above existing matting agents have a limited reduction in the gloss of polypropylene materials, and it is difficult to meet the requirements of automotive interior materials

Method used

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  • Polypropylene composition and preparation method thereof
  • Polypropylene composition and preparation method thereof
  • Polypropylene composition and preparation method thereof

Examples

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preparation example Construction

[0041] Among the raw materials for the preparation of the above-mentioned organic matting masterbatch, preferably, the Mooney viscosity of the EPDM rubber is greater than 60 under the test condition of ML(1+4)125°C, which can realize the organic matting masterbatch to a certain extent It has a greater gel content, better reduce the gloss of polypropylene, and better toughen polypropylene; preferably, the molecular weight of high-density polyethylene is greater than 500,000; high-density polyethylene at 190 ° C, 2.16KG The melt flow rate under the test conditions is less than 2g / 10min, which can achieve a better synergistic effect with EPDM rubber, better reduce gloss, and toughen polypropylene at the same time.

[0042] In some of the embodiments, the gel content of the organic matting masterbatch is 50-60%.

[0043] In some of these embodiments, the crosslinking agent is dicumyl peroxide.

[0044] In some of the embodiments, the polypropylene resin is copolymerized polypropy...

Embodiment 1

[0073] Preparation of organic matting masterbatch:

[0074] Mix 75 parts of high-density polyethylene (Lanzhou Petrochemical 5000S), 25 parts of EPDM rubber (Mitsui 3092), 0.15 parts of crosslinking agent, 0.1 part of lubricant, and 0.3 part of antioxidant, and mix them evenly through an extruder. The organic matt masterbatch can be obtained by melt blending, extruding and pelletizing. The screw speed of the extruder is 550 rpm, and the extrusion temperature is 220°C. There are 18 shear blocks in the extruder screw, of which 13 are reverse shear blocks. The gel content of the prepared organic matting masterbatch was 56%.

[0075] The polypropylene composition described in this implementation consists of the following components by weight: 76 parts of polypropylene resin PP K7227, 20 parts of talcum powder KCM 6300, 3 parts of the above-mentioned organic matting masterbatch, 0.2 part of antioxidant 1010, 0.2 part Antioxidant 168, 0.1 part of lubricant zinc stearate, 0.3 part...

Embodiment 2

[0081] A polypropylene composition is made up of the following components by weight: 74 parts of polypropylene resin PP K7227, 20 parts of talcum powder KCM 6300, 5 parts of organic matting masterbatch prepared in Example 1, 0.2 part of antioxidant 1010, 0.2 part of antioxidant 168, 0.1 part of lubricant zinc stearate, 0.3 part of light stabilizer UV-3808PP5, 0.3 part of carbon black.

[0082] See Example 1 for the preparation method.

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Abstract

The invention relates to a polypropylene composition and a preparation method thereof. The polypropylene composition is prepared from the following components in parts by weight: 20 to 90 parts of polypropylene resin, 1 to 20 parts of organic extinction master batch, 1 to 40 parts of mineral filler and 0.5 to 5 parts of additive, wherein the organic extinction master batch is prepared from 10 to 40 parts of ethylene propylene diene monomer, 60 to 90 parts of high-density polyethylene, 0.1 to 0.3 part of cross-linking agent and 0.2 to 0.5 part of other auxiliary materials by crosslinking and extrusion. The polypropylene composition involved in the invention has the advantages of lower glossiness, good mechanical performance and good appearance, and is very suitable for automotive interior parts.

Description

technical field [0001] The invention relates to the field of polymer compositions, in particular to a polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a general-purpose thermoplastic resin with excellent processability and physical and chemical properties. Compared with other general-purpose thermoplastic resins, PP has the advantages of low density, low price, and easy processing. It is widely used in automobiles. Interior and exterior decoration industry. With the development of the automobile industry, people have higher and higher requirements for the interior of the car, especially for comfort and safety. Polypropylene without matting treatment has a high gloss, which leads to strong light reflection in the cab , Seriously affect comfort, and may even cause traffic accidents. [0003] In order to reduce the luster of polypropylene materials in automotive interiors, the traditional method is to spray a laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/16C08L23/06C08K3/34C08K5/134C08K5/526C08K5/098C08K13/02
CPCC08L23/12C08L2205/03C08L23/16C08L23/06C08K3/34C08K5/134C08K5/526C08K5/098C08K13/02
Inventor 王灿耀朱福朋易庆锋于海鸥方安平
Owner GUANGDONG ALDEX NEW MATERIAL CO LTD
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