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Polypropylene modified composition and modified polypropylene

A technology of polypropylene and composition, applied in the field of polypropylene modified composition, which can solve the problems of poor thermal stability and achieve good thermal stability and good comprehensive performance

Active Publication Date: 2021-09-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide polypropylene modified composition and modified polypropylene material in order to overcome the problem of poor thermal stability of polypropylene, use mixed olefin-maleic anhydride copolymerized microspheres to fill polypropylene in this composition, provide the prepared The modified polypropylene material has better thermal stability

Method used

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  • Polypropylene modified composition and modified polypropylene
  • Polypropylene modified composition and modified polypropylene
  • Polypropylene modified composition and modified polypropylene

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Experimental program
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Embodiment approach

[0026] According to a preferred embodiment of the present invention, the composition content of the mixed C4 may be 5-10% by weight of 1-butene, 5-15% by weight of isobutene, 10-20% by weight of 1,3-butadiene, 1 , 5-15% by weight of 2-butadiene, 0.5-5% by weight of n-butane, 0.5-2% by weight of isobutane, 20-40% by weight of cis-2-butene, 2-10% by weight of trans-2-butene %, vinyl acetylene 5 to 20% by weight.

[0027] According to another preferred embodiment of the present invention, the composition content of the mixed C4 may be 0.1-2% by weight of 1-butene, 10-30% by weight of isobutene, 0.01-0.1% by weight of 1,3-butadiene, 0.5 to 5% by weight of n-butane, 30 to 40% by weight of isobutane, 20 to 40% by weight of cis-2-butene, and 5 to 20% by weight of trans-2-butene.

[0028] According to another preferred embodiment of the present invention, the composition content of the mixed C4 may be 5-15% by weight of 1-butene, 0.5-3% by weight of isobutene, 20-30% by weight of n-b...

Embodiment 1-5

[0065] Embodiment 1-5, optimization example 1-3

[0066] (1) Preparation of butene-maleic anhydride copolymerized microspheres:

[0067] Under nitrogen protection, 14kg of mixed C4A is passed into a 200L reactor containing 20kg of maleic anhydride, 2.4kg of azobisisobutyronitrile and 100L of isoamyl acetate to carry out a copolymerization reaction. The reaction pressure is 0.9MPa, the copolymerization reaction temperature is 70°C, and the copolymerization reaction time is 6h;

[0068] Pass the copolymerization reaction product into the flash separator for gas-liquid separation at 25°C and 0MPa. The obtained liquid-solid mixture continues to be separated in the centrifuge at 4000rpm and centrifuged for 20min to obtain a solid product. Wash with hexane, filter the obtained filter cake through a sand core funnel and vacuum dry at 90° C. for 8 hours to obtain a copolymer powder. The copolymer powder was tested, wherein the content of maleic anhydride structural units was 48 mol ...

Embodiment 6-9

[0071] Embodiment 6-9, optimization example 4-5

[0072] (1) Preparation of butene-maleic anhydride copolymerized microspheres:

[0073] Under nitrogen protection, 13.5kg of mixed C4B is passed into a 200L reactor containing 20kg of maleic anhydride, 4kg of dibenzoyl peroxide and 100L of isoamyl acetate in an organic reaction tank for copolymerization. The reaction pressure is 1MPa, the copolymerization reaction temperature is 80°C, and the copolymerization reaction time is 6h;

[0074]Pass the copolymerization reaction product into the flash separator to carry out gas-liquid separation at 30°C and 0MPa conditions, and the obtained liquid-solid mixture continues to carry out liquid-solid separation in the centrifuge at 4000rpm and centrifugation for 20min to obtain a solid product, which is then used After washing with hexane, the filter cake was vacuum-dried at 90° C. for 8 hours to obtain a copolymer powder. The copolymer powder was tested, wherein the content of maleic an...

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Abstract

The invention relates to the field of modified polypropylene and discloses a modified polypropylene composition and modified polypropylene. The composition contains: 100 parts by weight of polypropylene, 0.1-0.3 parts by weight of antioxidant, 0.25-10 parts by weight of butene-maleic anhydride copolymer microspheres and optional additives; wherein, the butene-maleic anhydride copolymer microspheres are optional; The particle size of the ene-maleic anhydride copolymerized microspheres is 0.05-2 μm. The prepared modified polypropylene filled butene-maleic anhydride copolymer microspheres can have better thermal stability, the oxidation induction period is 37-62min, and the heat distortion temperature at 0.45MPa is 96-141°C. The overall performance is good.

Description

technical field [0001] The invention relates to the field of modified polypropylene, in particular to a polypropylene modified composition and modified polypropylene prepared from the composition. Background technique [0002] Polypropylene is the most widely used plastic, which has the advantages of excellent mechanical properties, non-toxic, odorless and tasteless, and light weight. In an oxygen-free state, polypropylene has good stability. However, the tertiary carbon atoms on the main chain of polypropylene are highly sensitive to oxygen. During processing, storage, transportation and use, it is very easy to react with oxygen to form a tert-butyl peroxide, which degrades and ages polypropylene. Therefore, polypropylene modification is required to have good aging resistance, especially good thermal stability. [0003] In the prior art, the anti-aging performance of polypropylene is usually modified by adding an antioxidant, but this method cannot improve the thermal sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L35/00C08L23/08C08K5/103
Inventor 解娜张师军初立秋尹华邵静波宋文波刘振杰郭鹏吕芸侴白舸
Owner CHINA PETROLEUM & CHEM CORP