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Method for preparing modified dienopolymer rubber

A technology of diene polymer and active polymer, which is applied in the field of diene polymer rubber with both ends modified, and can solve problems such as difficult to meet

Inactive Publication Date: 2004-09-22
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in recent years, due to environmental considerations, the standard for saving the fuel cost of automobile tires has become higher and higher, so that it is difficult for any of the aforementioned synthetic rubbers to meet such requirements

Method used

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  • Method for preparing modified dienopolymer rubber
  • Method for preparing modified dienopolymer rubber
  • Method for preparing modified dienopolymer rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A stainless steel polymerization reactor having an internal volume of 20 liters was cleaned and dried, then purged with dry nitrogen. Next, 11.2 mmol of two isoprene monomer units and 3-(N,N-dimethylamino)-1-propyllithium (AI-200 CE, prepared from FMC lithium and cyclohexylamine solution) were added thereto. Prepared) Active saturated or unsaturated hydrocarbons obtained by polymerization reaction, 1420g 1,3-butadiene, 580g styrene, 324g tetrahydrofuran and 10.2kg hexane were polymerized under stirring at 65°C for 3 hours.

[0075] 0.4 mol of tin tetrachloride (coupling agent) was added to the obtained polymerization reaction mixture, and the reaction was continued for 30 minutes under stirring at 65°C. Further, 9.6 mmol of 1,1-dimethoxytrimethylamine (amine compound) was added to the obtained reaction mixture, and the reaction was continued for another 30 minutes under stirring at 65°C.

[0076] To the resulting reaction mixture was added 10 ml of methanol, and stirri...

Embodiment 2

[0078] Except (1) will be polymerized from two isoprene monomer units and 3-(N,N dimethylamino)-1-propyllithium (AI-200CE, prepared from FMC lithium and cyclohexylamine solution) The amount of active saturated or unsaturated hydrocarbons added by the reaction is changed to 10.3mmol, and the amount of (2) 1,1-dimethoxytrimethylamine (amine compound) added is changed to 8.68mmol, and the example is repeated 1 Obtain a polymer rubber in which both ends have been modified.

Embodiment 3

[0080] Except (1) will be produced by two isoprene monomer units and 3-(N,N-dimethylamino)-1-propyllithium (AI-200CE, prepared from FMC lithium, cyclohexylamine solution) The amount of active saturated or unsaturated hydrocarbons that the polymerization reaction obtains is changed to 14.9mmol, and (2) 1,1-dimethoxytrimethylamine (amine compound) is changed to 14.9mmol, and the embodiment is repeated 1 Obtain a polymer rubber in which both ends have been modified.

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Abstract

There is provided a process for producing a both end-modified diene polymer rubber comprising the steps of: (1) polymerizing a conjugated diene monomer or a combination thereof with an aromatic vinyl monomer in the presence of a compound represented by the following formula (1) to produce an alkali metal end-carrying active polymer, and (2) reacting the alkali metal end-carrying active polymer with an amine compound, a ketone compound, an acrylamide compound, a heterocyclic compound or a silyl compound represented by specific formulas, respectively: R-(CH2)n-X-M (1) wherein R is a functional group containing a substituent group-carrying nitrogen atom, X is a saturated or unsaturated hydrocarbon group comprising from 0 to 10 conjugated diene monomer units or aromatic vinyl monomer units, n is an integer of from 1 to 10, and M is an alkali metal.

Description

technical field [0001] The invention relates to a method for preparing a diene polymer rubber with good impact elasticity and both ends are modified. The polymer rubber obtained according to this method is most suitable for automobile tires, which can save fuel costs very well. Background technique [0002] Styrene-butadiene copolymers obtained by emulsion polymerization are recognized as rubbers for automobile tires. However, such copolymers have a problem that automobile tires containing such copolymers cannot meet the demand for saving fuel costs because such copolymers do not have good impact elasticity. [0003] In order to obtain a rubber with good impact elasticity, JP-B 5-46365 discloses a method comprising the following steps: using an organolithium compound as an initiator, and a Lewis acid such as an ether as a microstructure control agent, converting butadiene Copolymerization with styrene in hydrocarbon solvents. [0004] In addition, Japanese Patent No. 2540...

Claims

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Application Information

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IPC IPC(8): C08F8/00C08F236/10C08K3/34C08L25/10
Inventor 大岛真弓间部诚一稻垣胜成
Owner SUMITOMO CHEM CO LTD
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