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Propylene-butylene random copolymer as well as preparation method and application thereof

A technology of random copolymers and copolymers, applied in the field of olefin polymerization, can solve the problems of low melt flow index, low xylene soluble content, and low market competitiveness.

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are not many commercial propylene-butylene copolymers, and most of them are products with low melt flow index and high xylene soluble content, and the market competitiveness is not strong.

Method used

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  • Propylene-butylene random copolymer as well as preparation method and application thereof
  • Propylene-butylene random copolymer as well as preparation method and application thereof
  • Propylene-butylene random copolymer as well as preparation method and application thereof

Examples

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preparation example Construction

[0022] The present invention also provides a method for preparing a propylene-butene random copolymer, comprising the following steps: under olefin polymerization reaction conditions, in the presence of a catalyst and hydrogen, propylene and butene are polymerized to obtain the propylene-butene Olefin random copolymer; in the olefin polymerization reaction system, the hydrogen concentration is ≥1200ppm, preferably 1800-8000ppm, more preferably 2300-6000ppm;

[0023] Wherein, the catalyst is a Ziegler Natta catalyst containing a solid catalyst component, an aluminum alkyl compound and an optional external electron donor compound;

[0024] The solid catalyst component contains the reaction product of:

[0025] (i) magnesium-containing compounds;

[0026] (ii) titanium-containing compounds; and

[0027] (iii) internal electron donors;

[0028] Wherein, the internal electron donor contains phosphate compounds and diether compounds;

[0029] The amount of propylene and butene i...

Embodiment approach

[0048] According to a preferred embodiment of the present invention, the external electron donor compound is at least one of the organosilicon compounds represented by formula X,

[0049] (R 17 ) m’ (R 18 ) p’ Si(OR 19 ) q’ Formula Ⅹ

[0050] In formula X, R 17 , R 18 and R 19 each independently for C 1 -C 18 The hydrocarbon group optionally contains halogen; m' and p' are each independently an integer of 0-2, q' is an integer of 1-3, and the sum of m', p' and q' is 4;

[0051] Preferably, R 17 and R 18 each independently for C 3 -C 10 Straight chain or branched chain alkyl, C 3 -C 10 Alkenyl, C 3 -C 10 Cycloalkyl or C 6 -C 10 Aryl, optionally containing halogen; R 19 for C 1 -C 10 straight or branched chain alkyl, preferably C 1 -C 4 straight-chain or branched-chain alkyl, more preferably methyl.

[0052] Specifically preferably, the organosilicon compound is selected from cyclohexylmethyldimethoxysilane, diisopropyldimethoxysilane, di-n-butyldimeth...

Embodiment 1

[0067] This example is used to illustrate the acrylonitrile-butadiene random copolymer and its preparation method according to the present invention.

[0068] (1) Catalyst component preparation

[0069] In a 300ml glass reaction bottle, add 90ml of titanium tetrachloride and cool to -20°C, add 37mmol of magnesium halide carrier (prepared according to the method disclosed in CN1330086A Example 1) in terms of magnesium element, and then heat up to 110°C, and add 0.8mmol of tributyl phosphate and 7.9mmol of 2-isopropyl-2-isopentyl-1,3-dimethoxypropane during the heating process, and maintain at 110°C for 30min The liquid was filtered off, washed with titanium tetrachloride, then washed with hexane, and the catalyst component Cat-1 was obtained after vacuum drying.

[0070] (2) Preparation of acrylonitrile-butadiene random copolymer

[0071] Pass into propylene, butene and hydrogen in the reactor, catalyst component (Cat-1), triethylaluminum and cyclohexylmethyldimethoxysilane (...

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Abstract

The invention belongs to the field of olefin polymerization and relates to a propylene-butylene random copolymer as well as a preparation method and application thereof. Based on the total mole of the copolymer structure unit, the copolymer contains 92-99 mol% of propylene structure unit and 1-8 mol% of butylene structure unit; the melt flow index of the copolymer at 230 DEG C under the load of 2.16 kg is greater than or equal to 20g / 10min; the xylene soluble substance content of the copolymer is less than or equal to 5wt%. The propylene-butylene random copolymer disclosed by the invention has the advantages of high melt flow index and few xylene soluble substances, and does not contain a plasticizer. The characteristics are beneficial to application in the fields of food, medical treatment and public health and the like.

Description

technical field [0001] The invention belongs to the field of olefin polymerization, and in particular relates to a propylene-butene random copolymer, a method for preparing a propylene-butene random copolymer, and a propylene-butene random copolymer prepared by the method , and the application of the propylene-butene random copolymer in food and / or medical hygiene products. Background technique [0002] Polypropylene (PP) is a colorless and translucent thermoplastic resin. It has the advantages of low relative density, easy processing, high impact strength, corrosion resistance, good electrical insulation and low price. It is the fastest growing material among general plastics. , are widely used in chemical industry, construction, household appliances, agriculture, automobile industry and many other fields. At present, new PP products are concentrated on copolymerization products. Copolymers in developed countries in Europe and the United States account for 40% of the total...

Claims

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Application Information

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IPC IPC(8): C08F210/06C08F210/08C08F4/646C08F4/649C08L23/14
CPCC08F210/06C08L23/142C08L2203/02C08L2207/10C08F210/08C08F4/646C08F4/6497C08F4/6494Y02P20/52
Inventor 赵瑾周俊领夏先知刘月祥谭扬刘涛陈龙任春红凌永泰高富堂李威莅
Owner CHINA PETROLEUM & CHEM CORP
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