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Metallocene catalyst, preparation method and application

A technology of metallocene catalysts and compounds, applied in the field of olefin coordination polymerization catalysts, can solve the problems of high price and poor performance

Active Publication Date: 2020-09-04
浙江链科科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The comonomers in Tafmer products contain 1-butene and 1-hexene, and their performance is not as good as that of mPE produced by limited geometry metallocene catalysts. In addition, the price of Mitsui's mPE is relatively high, so it has not been sold in the Chinese market. become a mainstream product

Method used

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  • Metallocene catalyst, preparation method and application
  • Metallocene catalyst, preparation method and application
  • Metallocene catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] After fully replacing the 2-liter stainless steel autoclave with nitrogen, add 1L of n-hexane to the reaction kettle, add 3mg of metallocene catalyst (1), 3mL of MAO (10% toluene solution), fill with 0.1L of hydrogen, and fill with ethylene to pressure 0.7MPa, stirred, raised the temperature to 125°C for 2 hours, and collected 286 grams of polymerization product.

Embodiment 2

[0058]After the 2-liter stainless steel autoclave was fully replaced by nitrogen, 1 L of n-heptane was added to the reaction kettle, 5 mg of catalyst (2), 2 mL of modified MAO (10% toluene solution), 60 mL of 1-hexene, and 0.05 L was filled with ethylene to a pressure of 0.8 MPa, stirred, heated to 135°C for 2 hours, and 262 grams of polymerization products were collected.

Embodiment 3

[0060] After fully replacing the 2-liter stainless steel autoclave with nitrogen, add 1 L of n-hexane, 2 mg of metallocene catalyst (3), 2 mL of modified MAO (10% toluene solution), 60 mL of 1-hexene into the reaction kettle, and fill with hydrogen 0.1L, add 0.5kg of propylene, fill with ethylene until the pressure is 0.7MPa, stir, raise the temperature to 110°C for 2 hours, and collect 275g of polymerization product.

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Abstract

The invention relates to a metallocene catalyst and a preparation method and application thereof. The metallocene catalyst is a compound conforming to the following general formula: the formula is show in the description, wherein R8 or R9 is selected from H, F; C1-C10 aliphatic group and the like; X is halogen and the like; the formula as shown in the description is C5-C30 cyclopentadiene or derivatives thereof and the like; M is selected from Ti, Zr and the like; A is selected from C, Si and the like. In the invention, the catalyst is added in the process of homopolymerization of olefins andcopolymerization of binary or more than binary monomers to prepares polyolefins, and the preparation method has simple process and low cost. The catalyst is suitable for a solution polymerization process, gas phase polymerization process or the like or combined polymerization process.

Description

technical field [0001] The invention belongs to the field of olefin coordination polymerization catalysts, and specifically relates to a metallocene catalyst and a preparation method and application of polyolefins. Background technique [0002] Metallocene polyethylene (mPE) has been used in many fields since its industrial production in 1991. mPE is mainly used to produce various films (such as heat shrinkable films, high-quality garbage bags, industrial outer packaging bags, agricultural films, composite packaging films, stretch stretch films, etc.). With the advancement of catalyst and process technology, the application of metallocene high-density polyethylene (HDPE) and medium-density polyethylene (MDPE) in the fields of hollow, rotational molding, injection molding and pipelines has gradually increased in recent years; the metallocene linearity is low. Density polyethylene (LLDPE) is mainly used for high-quality films, moldings, pipes and wires and cables; metallocene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/02C08F110/06C08F210/02C08F10/00C08F210/06C08F210/14C08F236/20C08F4/642C08F4/68C08F4/70
CPCC08F10/00C08F110/02C08F110/06C08F210/02C08F210/06C08F210/14C08F220/14C08F236/20C08F4/642C08F4/6423C08F4/68C08F4/70
Inventor 黄启谷付瑶时子海张少蒙王秋璨于洪超杨万泰
Owner 浙江链科科技有限公司
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