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Catalyst composition and method for preparing polyisobutene by using same

A polyisobutylene and catalyst technology, applied in the field of polyisobutylene preparation, can solve the problems of corrosion, product quality deterioration, difficult treatment, etc., and achieve the effect of solving a large amount of waste water and excellent polymerization conversion rate

Active Publication Date: 2021-11-30
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] For the polymerization of highly reactive polybutene, boron-based catalysts such as BF 3 , but this catalyst is poisonous and has a gas type, and is difficult to handle
In addition, in order to improve reactivity and selectivity, boron-alcohol or boron-ether complexes are prepared and used, but there is a problem that the activity of the catalyst decreases with time
[0009] At the same time, according to the solvent-bonded organometallic catalyst (Macromol.Rapid Commun., vol.20, no.10, pp.555-559) researched by Professor Kuhn of the Technical University of Munich, although it can solve the problem of boron-type Lewis due to, for example, traditional technology. The toxic components of the acid catalyst lead to deterioration of product quality and related problems of corrosion, but since the reaction time is 16 hours and quite long in order to obtain a high conversion rate, as the time increases, structural isomerization occurs by a part of the product reacting with the catalyst, Reduced exo-content and therefore less competitive than Lewis acid catalysts

Method used

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  • Catalyst composition and method for preparing polyisobutene by using same
  • Catalyst composition and method for preparing polyisobutene by using same
  • Catalyst composition and method for preparing polyisobutene by using same

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Experimental program
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Effect test

preparation example Construction

[0064] The preparation method of polyisobutylene

[0065] The method for producing polyisobutene of the present invention is characterized by comprising the step of polymerizing isobutene in the presence of the catalyst composition.

[0066] In the present invention, the polymerization of isobutylene can be carried out at 10°C to 50°C, specifically above 10°C, above 15°C, above 25°C, and below 50°C, below 40°C, below 35°C, for example at 30°C.

[0067] If the polymerization temperature is above 0°C, appropriate catalyst activity can be obtained, the polymerization conversion rate can be shown to be excellent, and a small amount of catalyst can be used, while if the polymerization temperature is below 50°C, the chain transfer reaction can be controlled, the molecular weight of polyisobutylene and The exo content can be shown to be high and polyisobutylene with high quality can be produced.

[0068] In addition, the polymerization needs to meet the above temperature condition...

Embodiment

[0091] Hereinafter, the present invention will be described in more detail with reference to the embodiments. However, the following embodiments are only examples, and the scope of the present invention is not limited thereto.

[0092] Preparation of catalyst

preparation Embodiment 1

[0094] [Formula 1-1]

[0095]

[0096] In the glove box, 1 g of [H(Et 2 O) 2 ][B(C 6 f 5 ) 4] was added to a round bottom flask, and 10 mL of dichloromethane was added. At room temperature, 5 equivalents of anhydrous butyl ether (Sigma-Aldrich Co.) were added and stirred for 30 minutes. After stirring, all solvent was removed under vacuum. The white powder thus obtained was washed with anhydrous hexane by 5 mL x three times, and then dried again under vacuum to obtain [H(nBu 2 O) 2 ][B(C 6 f 5 ) 4 ].

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Abstract

The present invention relates to: a catalyst composition comprising an oxonium ion-based catalyst and an additive; and a method for preparing polyisobutene by using same.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of priority based on Korean Patent Application No. 2019-0162054 filed on December 6, 2019 and Korean Patent Application No. 2019-0162055 filed on December 6, 2019. Their entire contents are incorporated into this specification by reference. technical field [0003] The invention relates to a catalyst composition comprising an oxonium ion catalyst and a nitrile additive, and a method for preparing polyisobutene using the catalyst composition. Background technique [0004] Typically, during the preparation of oligomers or polymers by cationic polymerization of monomers, the growing polymer chain contains reactive moieties with a positive charge. For example, the active moiety can be a carbocation (carbocation) or an oxonium ion. [0005] As a catalyst or initiator for such cationic polymerization, aluminum-based or boron-based Lewis acids are generally used. Examp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/10C08F4/54
CPCC08F10/10C08F4/54C08F6/02C08F2410/01C08F110/10C08L23/22C08F4/52C08F2500/02C08F2500/03C08F2/06C07F5/027
Inventor 曹东铉许成范金元熙李真崔景信金姬贞
Owner LG CHEM LTD
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