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Modified conjugated diene polymer, method for producing same, and rubber composition comprising same

A technology of conjugated dienes and polymers, which is applied in transportation and packaging, tire parts, special tires, etc., and can solve the problems of poor processing performance and mixed processing performance reduction

Active Publication Date: 2021-09-03
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] At the same time, in the case of terminal-modified polymers, affinity with fillers can be improved, and there is an advantage that mixing properties such as tensile properties and viscoelastic properties are improved, but on the contrary, there is mixing processability Greatly reduce the problem of poor processability

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  • Modified conjugated diene polymer, method for producing same, and rubber composition comprising same
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  • Modified conjugated diene polymer, method for producing same, and rubber composition comprising same

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preparation example Construction

[0099] Preparation method of modified conjugated diene polymer catalyzed by neodymium

[0100] In addition, the present invention provides a preparation method of the neodymium-catalyzed modified conjugated diene polymer.

[0101] The production method according to one embodiment of the present invention is characterized by comprising: polymerizing a conjugated diene-based monomer in a hydrocarbon solvent in the presence of a catalyst composition containing a neodymium compound to prepare the active polymer (S1); and The living polymer is reacted with a modifier represented by Formula 1 below (S2).

[0102] [Formula 1]

[0103]

[0104] In formula 1, R 1 to R 8 Same as defined above.

[0105] The step (S1) is a step of preparing a living polymer comprising an activated organometallic moiety derived from the catalyst composition, and the conjugated diene-based monomer and the modified monomer can be polymerized in a hydrocarbon solvent in the presence of the catalyst c...

preparation Embodiment 1

[0200] (1) Preparation of 3-((3-morpholinopropyl) amino) ethyl propionate

[0201] 50 ml of an ethanol solution in which 10.3 g of ethyl acetate was dissolved was cooled to 0°C, and 15 g of (3-morpholinopropyl)amine was slowly injected so that the temperature did not rise above 30°C. After the injection was completed, the reaction solution was stirred at 0° C. for 3 hours, and further stirred at room temperature (23±3° C.) for 24 hours. After the reaction was finished, volatile substances were removed under reduced pressure to prepare ethyl 3-((3-morpholinopropyl)amino)propionate.

[0202] (2) Preparation of 3-((3-morpholinopropyl) (trimethylsilyl) amino) ethyl propionate

[0203] 2.5 g of ethyl 3-((3-morpholinopropyl) amino) propionate prepared above was dissolved in n-hexane solution, and 28.8 ml of triethylamine (Et 3 N), then, the temperature was lowered to 0°C. After that, 15.8 ml of a trimethylchlorosilane (TMSCl) solution was slowly injected thereinto, and the reacti...

preparation Embodiment 2

[0206] (1) Preparation of 3-((3-thiomorpholinopropyl) amino) ethyl propionate

[0207] 50 ml of an ethanol solution in which 10.3 g of ethyl acetate was dissolved was cooled to 0°C, and 16 g of (3-thiomorpholinopropyl)amine was slowly injected so that the temperature did not rise above 30°C. After the injection was completed, the reaction solution was stirred at 0°C for 3 hours, and further stirred at room temperature (23±3°C) for 24 hours. After the reaction was finished, volatile substances were removed under reduced pressure to prepare ethyl 3-((3-morpholinopropyl)amino)propionate.

[0208] (2) Preparation of 3-((3-thiomorpholinopropyl) (trimethylsilyl) amino) ethyl propionate

[0209] 2.6 g of ethyl 3-((3-thiomorpholinopropyl) amino) propionate prepared above was dissolved in n-hexane solution, and 28.8 ml of triethylamine (Et 3 N), then, the temperature was lowered to 0°C. After that, 15.8 ml of trimethylchlorosilane (TMSCl) was slowly injected thereinto, and the react...

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Abstract

The present invention relates to a neodymium-catalysis modified conjugated diene polymer having excellent filler affinity, a method for producing same, and a rubber composition comprising same, and provides a neodymium-catalysis modified conjugated diene polymer comprising: a repeating unit derived from a conjugated diene monomer; and, on at least one terminal of a polymer, a denaturant-derived functional group represented by chemical formula 1.

Description

technical field [0001] [Cross Reference to Related Application] [0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2019-0118069 filed on September 25, 2019, the entire contents of which are incorporated herein by reference. [technical field] [0003] The present invention relates to a neodymium-catalyzed modified conjugated diene-based polymer having excellent affinity with a filler, a preparation method thereof, and a rubber composition comprising the neodymium-catalyzed modified conjugated diene-based polymer . Background technique [0004] According to the recent demand for automobiles with low fuel consumption, modified conjugated diene-based polymers having modulation stability represented by wet skid resistance and low rolling resistance and excellent abrasion resistance and tensile properties are required As a rubber material for tires. [0005] In order to reduce rolling resistance of tires, there is a method of re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F136/06C08F8/32C08F8/34C08L15/00
CPCC08F8/32C08F8/34C08L15/00C08F136/06C08C19/22C08C19/25Y02T10/86C08F4/545C08F2/06C08F2/38C08L91/00C08L45/00C08K3/04C08K3/22C08K5/09C08K3/06C08K5/31C08K5/47C08F236/04C08F8/42C08F8/30C08L9/00C08L21/00B60C1/00C08F236/06C08K3/36
Inventor 姜锡錬裵珠良崔书愿李泰喆
Owner LG CHEM LTD
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