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Transparent polypropylene material and preparation method thereof

A transparent polypropylene and polypropylene resin technology, which is applied in the field of transparent polypropylene materials and its preparation, can solve problems such as optimization, transparency, poor impact resistance, and restrictions on the industrial application of high added value of polypropylene, so as to improve transparency , Improve the effect of impact resistance

Active Publication Date: 2021-02-19
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polypropylene materials are not satisfactory in terms of transparency and impact resistance, which limits the industrial application of polypropylene with high added value
At present, most of the transparent nucleating agents in the market are used to improve the optical properties of polypropylene, but they cannot take into account the optimization of mechanical properties.

Method used

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  • Transparent polypropylene material and preparation method thereof
  • Transparent polypropylene material and preparation method thereof
  • Transparent polypropylene material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a transparent polypropylene material, comprising the following steps:

[0032] (1) Using the sphripol polymerization process, propylene is pre-polymerized under the combined action of DQ-Ⅲ catalyst, triethylaluminum and dicyclopentyldimethoxysilane;

[0033] (2) the pre-polymerization product of step 1) gained and propylene, hydrogen are sent into the first loop reactor to carry out polymerization reaction, the hydrogen concentration of controlling the first loop reactor is 1800ppm, and ethylene / propylene is 25kg / t, reacts The temperature is 68°C to obtain polypropylene powder;

[0034] (3) Send the polypropylene powder material of step (2) gained and propylene, hydrogen into the second loop reactor to continue polymerization, control the hydrogen concentration of the second loop reactor to be 1800ppm, and ethylene / propylene is 25kg / t , the reaction temperature is 68°C to obtain polypropylene resin powder;

[0035] (4) The polypropylene resin p...

Embodiment 2

[0038] A preparation method of a transparent polypropylene material, comprising the following steps:

[0039] (1) Using the sphripol polymerization process, propylene is pre-polymerized under the combined action of DQ-Ⅲ catalyst, triethylaluminum and dicyclopentyldimethoxysilane;

[0040] (2) the prepolymerized product of step (1) gained and propylene, hydrogen are sent into the first loop reactor and carry out polymerization reaction, the hydrogen concentration of controlling the first loop reactor is 2000ppm, and ethylene / propylene is 27kg / t, The reaction temperature is 68°C to obtain polypropylene powder;

[0041] (3) Send the polypropylene powder material of step (2) gained and propylene, hydrogen into the second loop reactor to continue polymerization, control the hydrogen concentration of the second loop reactor to be 1800ppm, and ethylene / propylene is 25kg / t , the reaction temperature is 68°C to obtain polypropylene resin powder;

[0042] (4) The polypropylene resin p...

Embodiment 3

[0045] A preparation method of a transparent polypropylene material, comprising the following steps:

[0046] (1) Using the sphripol polymerization process, propylene is pre-polymerized under the combined action of DQ-Ⅲ catalyst, triethylaluminum and dicyclopentyldimethoxysilane;

[0047] (2) the prepolymerized product of step (1) gained and propylene, hydrogen are sent into the first loop reactor and carry out polymerization reaction, the hydrogen concentration of controlling the first loop reactor is 1900ppm, and ethylene / propylene is 30kg / t, The reaction temperature is 68°C to obtain polypropylene powder;

[0048] (3) The polypropylene powder material of step (2) gained and propylene, hydrogen are sent into the second loop reactor to continue polymerization, the hydrogen concentration of the control second loop reactor is 1900ppm, and ethylene / propylene is 27kg / t , the reaction temperature is 68°C to obtain polypropylene resin powder;

[0049](4) The polypropylene resin p...

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Abstract

The invention discloses a transparent polypropylene material and a preparation method thereof. The transparent polypropylene material provided by the invention has a melt mass flow rate of 6-10g / 10minand an ethylene content of 1-5wt%, and comprises the following components in percentage by mass: 98.7-99.8% of polypropylene resin powder, 0.05-0.3% of a main antioxidant, 0.05-0.3% of an auxiliary antioxidant, 0.05-0.2% of a halogen absorbent and 0.05-0.5% of a nucleating agent, wherein the nucleating agent is bis (p-ethyldibenzylidene) sorbitol. According to the transparent polypropylene material and the preparation method thereof of the invention, by optimizing the dosages of the polypropylene resin powder, the main antioxidant, the auxiliary antioxidant, the halogen absorbent and the nucleating agent and selecting the bis (p-ethyldibenzylidene) sorbitol as the nucleating agent, the transparency and impact resistance of the transparent polypropylene resin are significantly improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a transparent polypropylene material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the automobile industry, high-speed trains, construction industry, electronic telecommunications industry and the high performance of polypropylene products, the output and demand of polypropylene have increased significantly, becoming the fastest growing general-purpose plastic in the past ten years. Random copolymerized polypropylene is an important polypropylene material. In actual production, different types of comonomers are usually added to the basic structure of polypropylene molecular chains to improve the physical properties of polypropylene. Among them, ethylene is polypropylene. The most commonly used comonomer in propylene materials. However, polypropylene materials are not satisfactory in terms of transparency ...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K5/00C08K5/053C08F210/16C08F210/06
CPCC08K5/00C08K5/053C08F210/16C08L2201/10C08F210/06C08L23/14Y02P20/52
Inventor 周小群蒋文军封水彬李国飞周丹东
Owner CHINA PETROLEUM & CHEM CORP