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Modified polypropylene master batch and preparation method thereof

A technology of polypropylene and homopolypropylene, applied in the field of modified polypropylene masterbatch and its preparation, which can solve the problems of high price of imported materials, high production cost, and insufficient toughness

Pending Publication Date: 2021-11-12
山东鲁燕色母粒有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the thin-walled injection molding products in China rely on imports. Due to the high price of imported materials, the production cost is high. Therefore, researchers have been devoting themselves to the development of new materials suitable for thin-walled injection molding products.
[0003] Thin-wall injection molding products made directly from PP are too brittle and have insufficient toughness. After adding PE modification, the toughness is good but the transparency is too poor

Method used

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  • Modified polypropylene master batch and preparation method thereof

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preparation example Construction

[0047] The present invention also provides a preparation method of the above-mentioned modified polypropylene masterbatch, comprising the following steps:

[0048] A) after stirring and mixing the homopolypropylene and the nucleating agent, extrude and granulate to obtain pellets;

[0049] B) Stir and mix the pellets obtained in step A), the polypropylene mixed material, the low-pressure polyethylene resin and the styrene thermoplastic elastomer, and after cooling to 55-65° C., extrude and granulate to obtain a modified polypropylene master batch.

[0050] In the preparation method of the modified polypropylene master batch provided by the present invention, the raw material components and proportions used are the same as above, and are not repeated here.

[0051] In the present invention, the homopolypropylene and the nucleating agent are stirred and mixed, and then extruded and granulated to obtain pellets.

[0052]In some embodiments of the present invention, the rotationa...

Embodiment 1

[0064] A modified polypropylene masterbatch, comprising:

[0065] Polypropylene mixed material 80wt%;

[0066] Low pressure polyethylene resin 10wt%;

[0067] Styrene thermoplastic elastomer 10wt%;

[0068] The polypropylene mixed material includes homopolypropylene and a rare earth nucleating agent, and the mass ratio of the homopolypropylene and the rare earth nucleating agent is 95:5;

[0069] The melt index of the low pressure polyethylene resin is 7g / 10min;

[0070] The Shore hardness of the styrene thermoplastic elastomer is 32, the tensile strength is 28MPa, the elongation is 1000%, the use temperature of the styrene thermoplastic elastomer is 160° C., and the density is 1.03g / cm 3 .

[0071] The preparation method of the modified polypropylene master batch, comprising:

[0072] 1) After stirring and mixing the homopolypropylene and the nucleating agent at 200 r / min for 3 min in a high-speed mixing mixer, extruding and granulating to obtain pellets;

[0073] The e...

Embodiment 2

[0077] A modified polypropylene masterbatch, comprising:

[0078] Polypropylene mixed material 70wt%;

[0079] Low pressure polyethylene resin 5wt%;

[0080] Styrene thermoplastic elastomer 25wt%;

[0081] The polypropylene mixed material includes homopolypropylene and a rare earth nucleating agent, and the mass ratio of the homopolypropylene and the rare earth nucleating agent is 95:5;

[0082] The melt index of the low pressure polyethylene resin is 5g / 10min;

[0083] The Shore hardness of the styrene thermoplastic elastomer is 50, the tensile strength is 25MPa, and the elongation is 950%, the use temperature of the styrene thermoplastic elastomer is 150° C., and the density is 1.02g / cm 3 .

[0084] The preparation method of the modified polypropylene master batch, comprising:

[0085] 1) After stirring and mixing the homopolypropylene and the nucleating agent at 200 r / min for 3 min in a high-speed mixing mixer, extruding and granulating to obtain pellets;

[0086] The...

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Abstract

The invention relates to the technical field of high polymer materials, in particular to a modified polypropylene master batch and a preparation method thereof. The modified polypropylene master batch provided by the invention comprises the following components in percentage by weight: 50-80% of a polypropylene mixed material; 5-25% of low-pressure polyethylene resin; and 10-30% of a styrene thermoplastic elastomer; the sum of the dosages of the components is 100%. The polypropylene mixed material comprises homo-polypropylene and a nucleating agent. According to the modified polypropylene master batch, the specific polypropylene mixed material is matched with the low-pressure polyethylene resin and the styrene thermoplastic elastomer to achieve a synergistic effect under a certain matching condition, and the finally obtained modified polypropylene master batch is relatively excellent in transparency and mechanical property.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a modified polypropylene master batch and a preparation method thereof. Background technique [0002] Thin-walled injection molded products include high-density and ultra-thin injection molded parts, such as mobile phone back covers, DVD packaging boxes, etc., as well as disposable thin-walled fast food boxes, water cups and other consumer goods. At present, most domestic thin-walled injection molding products rely on imports. Due to the high price of imported materials, the production cost is high. For this reason, researchers have been committed to developing new materials suitable for thin-walled injection molding products. [0003] The thin-walled injection molding products directly made of PP are too brittle and have insufficient toughness. After adding PE modification, the toughness is good but the transparency is too poor. SUMMARY OF THE INVENTION [0004] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/22C08L23/12C08L23/06C08L53/02
CPCC08J3/226C08J2423/12C08J2423/06C08J2453/02
Inventor 童兵魏彬李磊
Owner 山东鲁燕色母粒有限公司