Unlock instant, AI-driven research and patent intelligence for your innovation.

Transition metal catalyst composition and applications thereof

A metallocene compound, transition metal technology, applied in the field of transition metal catalyst compositions, can solve the problems of difficult high molecular weight polymers, reduced polymerization activity, unsuitable for preparing high molecular weight polymers, etc., and achieves low gel content and high VNB. The effect of content

Active Publication Date: 2017-02-01
CHINA PETROLEUM & CHEM CORP +1
View PDF13 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to obtain high-molecular-weight polymers with the above-mentioned catalyst system, and when solution polymerization is carried out at 100°C or higher, the polymerization activity decreases rapidly
Therefore, this system is not suitable for the preparation of high-molecular-weight polymers with a weight-average molecular weight Mw of 100,000 or more

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Transition metal catalyst composition and applications thereof
  • Transition metal catalyst composition and applications thereof
  • Transition metal catalyst composition and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] This example is used to illustrate the transition metal catalyst composition of the present invention and its application in the preparation of VNB type ethylene-alpha olefin-non-conjugated diene polymer.

[0066] Specifically, the method for preparing VNB type ethylene-alpha olefin-non-conjugated diene polymer is:

[0067] In the 1L CSTR reactor (purchased from Yantai Shuguang Precision Instrument Co., Ltd., model 1KCF, the same below), hexane is mixed with ethylene monomer, propylene monomer and VNB monomer, and then transported to the polymerization reaction via a raw material pump. In the device, the consumption of ethylene monomer, propylene monomer and VNB monomer is shown in Table 1. Then, bis-(cyclohexyl-cyclopentadienyl) di-p-tolyl titanium, trityl tetrakis (pentafluorophenyl) sodium borate and triisobutyl aluminum were added into the polymerization reactor through a metering pump to carry out Polymerization reaction, wherein, bis-(cyclohexyl-cyclopentadienyl)...

Embodiment 2

[0074] This example is used to illustrate the transition metal catalyst composition of the present invention and its application in the preparation of VNB type ethylene-alpha olefin-non-conjugated diene polymer.

[0075] Present embodiment adopts the method identical with embodiment 1 to carry out, difference is:

[0076] The transition metal catalyst composition used is bis-(cyclohexyl-cyclopentadienyl) di-m-cresyl titanium and N,N-dimethylanilinium tetrakis(pentafluorophenyl) sodium borate, wherein, bis- Molar ratio of (cyclohexyl-cyclopentadienyl) two m-cresyl titanium (calculated as titanium element) and N,N-dimethylanilinium tetrakis (pentafluorophenyl) sodium borate (calculated as boron element) is 1:0.5, and the molar ratio of the composition to ethylene monomer is 1.5×10 -6 :1. The conditions of the polymerization reaction are listed in Table 1.

[0077] Continuously collect the polymer solution on the discharge line of the reactor to remove the solvent to obtain a ...

Embodiment 3

[0079] This example is used to illustrate the transition metal catalyst composition of the present invention and its application in the preparation of VNB type ethylene-alpha olefin-non-conjugated diene polymer.

[0080] Present embodiment adopts the method identical with embodiment 1 to carry out, difference is:

[0081] The transition metal catalyst composition used is two-(methyl-cyclopentadienyl) two-p-tolyl titanium and triethylaluminum, wherein, two-(cyclohexyl-cyclopentadienyl) two-m-tolyl The molar ratio of titanium (calculated as titanium element) and triethylaluminum (calculated as aluminum element) is 1:1, and the molar ratio of the composition and ethylene monomer is 1.5×10 -6 :1. The conditions of the polymerization reaction are listed in Table 1.

[0082] Continuously collect the polymer solution on the discharge line of the reactor to remove the solvent to obtain a solid polymer, dry it in vacuum and weigh it to obtain the polymer yield data. According to the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a transition metal catalyst composition, which comprises a main catalyst and an activator, wherein the main catalyst comprises a metallocene compound represented by a formula (I), and the activator comprises an aluminum compound and / or a boron compound. The present invention further discloses applications of the transition metal catalyst composition in preparation of polymers. According to the present invention, the storage stability and the high-temperature resistance of the composition are good, and the high molecular weight copolymer can be prepared with the composition; and with the application of the composition to prepare ethylene-alpha-olefin-non-conjugated diolefin, particularly a VNB type polymer, the ethylene-alpha-olefin-non-conjugated diolefin with characteristics of low gel content and high VNB content can be obtained. The formula (I) is defined in the specification.

Description

technical field [0001] The invention relates to a transition metal catalyst composition and its application. Background technique [0002] Olefin copolymers obtained by copolymerization of ethylene and one or more α-olefins and one or more dienes. By controlling the crystallization of polyethylene, elastic copolymers can be obtained. Among them, ethylene, propylene or other higher α-olefins , The elastomeric copolymer obtained by copolymerization of non-conjugated dienes is usually called EPDM. [0003] EPDM is usually prepared industrially from ethylene, propylene or other higher alpha olefins and non-conjugated dienes through a Ziegler-Natta catalytic system by solution or suspension polymerization. After the polymerization of ethylene propylene monomer, a saturated copolymer main chain is formed to form a random rubber elastomer. In order to make the rubber products vulcanized or crosslinked, a non-conjugated diene is introduced into the saturated main chain of the ethyl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/18C08F4/6592
Inventor 陈建军邵明波徐一兵唐正伟李传清王雪常学工
Owner CHINA PETROLEUM & CHEM CORP