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Copolymer, rubber composition, rubber composition for tire side use, crosslinked rubber composition, and tire

A technology of rubber composition and copolymer, applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of low crack growth resistance and poor compatibility of conjugated dienes, and achieve crack growth resistance. excellent effect

Inactive Publication Date: 2013-12-25
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these techniques have drawbacks such as poor compatibility with conjugated dienes, low crack growth resistance, etc. (see, for example, JP2000-063639A (Patent Document 7))
However, it is difficult to provide efficient copolymerization of olefins and dienes using such polymerization systems

Method used

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  • Copolymer, rubber composition, rubber composition for tire side use, crosslinked rubber composition, and tire
  • Copolymer, rubber composition, rubber composition for tire side use, crosslinked rubber composition, and tire
  • Copolymer, rubber composition, rubber composition for tire side use, crosslinked rubber composition, and tire

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[0118] by [A] + Examples of represented cations include carbonium cations, oxonium cations, ammonium cations, phosphonium cations, cycloheptatrienyl cations, and transition metal-containing ferrocenium cations. Examples of the carbenium cation include trisubstituted carbenium cations such as triphenylcarbenium cation and tri(substituted phenyl)carbenium cation. Specific examples of tri(substituted phenyl)carbenium cations include tris(tolyl)carbenium cations. Examples of ammonium cations: trialkylammonium cations such as trimethylammonium cations, triethylammonium cations, tripropylammonium cations and tributylammonium cations; N,N-dialkylanilinium cations such as N,N- Dimethylanilinium cations, N,N-diethylanilinium cations, and N,N-2,4,6-pentamethylanilinium cations; and dialkylammonium cations such as diisopropylammonium cations and bicyclic Hexylammonium cation. Examples of the phosphonium cation include triarylphosphonium cations such as triphenylphosphonium cation, tri...

Embodiment 1

[0265] 160 mL of toluene solution was added to a fully dried 400 mL pressure-resistant glass reactor, and then ethylene was introduced into it at 0.8 MPa. Meanwhile, in a glove box under a nitrogen atmosphere, 28.5 μmol of bis(2-phenylindenyl)gadolinium bis(dimethylsilylamide)[(2-PhC 9 h 6 ) 2 GdN(SiHMe 2 ) 2 ], 34.2 μmol dimethylanilinium tetrakis (pentafluorophenyl) borate [Me 2 NHPhB(C 6 f 5 ) 4 ] and 1.43 mmol of diisobutylaluminum hydride were dissolved in 8 mL of toluene, thereby obtaining a catalyst solution. Then, the catalyst solution was taken out from the glove box, and 28.2 μmol of the catalyst solution in terms of gadolinium was added to the monomer solution, which was then subjected to polymerization at room temperature for 5 minutes. Thereafter, while the introduction pressure of ethylene was decreased at a rate of 0.2 MPa / min, 100 mL of a toluene solution containing 15.23 g (0.28 mol) of 1,3-butadiene was added, and polymerization was performed for anot...

Embodiment 2

[0267] 700 mL of a toluene solution containing 28.0 g (0.52 mol) of 1,3-butadiene was added to a sufficiently dried 2 L stainless steel container, and then ethylene was introduced thereinto at 0.8 MPa. Meanwhile, in a glove box under a nitrogen atmosphere, 400.0 μmol of dimethylaluminum (μ-dimethyl)bis(2-phenylindenyl)neodymium [(2-PhC 9 h 6 ) 2 Nd(μ-Me) 2 Al Me 2 ] and 200.0 μmol triphenylcarbenium tetrakis (pentafluorophenyl) borate [Ph 3 CB(C 6 f 5 ) 4 ], which was dissolved in 80 mL of toluene, thereby obtaining a catalyst solution. Then, the catalyst solution was taken out from the glove box, and 390.0 μmol of the catalyst solution in terms of neodymium was added to the monomer solution, which was then subjected to polymerization at 60° C. for 60 minutes. After the polymerization, 1 mL of an isopropanol solution containing 5% by mass of 2,2′-methylene-bis(4-ethyl-6-tert-butylphenol) (NS-5) was added to terminate the reaction. Then, a large amount of methanol was ...

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Abstract

Provided is a copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer being used for producing a rubber that is excellent in terms of low heat buildup, heat resistance, and ozone resistance (weather resistance). Also provided are a rubber composition containing said copolymer, a crosslinked rubber composition prepared by cross-linking said rubber composition, and a tire made by using said rubber composition or said crosslinked rubber composition. The copolymer of a conjugated diene compound and a non-conjugated olefin is characterized in that the content of 1,2 adduct moieties (including 3,4 adduct moieties) in a moiety originating from the conjugated diene compound is less than or equal to 5%.

Description

technical field [0001] The present invention relates to a copolymer of a conjugated diene compound and a non-conjugated olefin (conjugated diene compound / non-conjugated olefin copolymer), a rubber composition, a rubber composition for a tire sidewall, a crosslinked rubber composition, and a tire , and particularly to a copolymer of a conjugated diene compound and a non-conjugated olefin for producing rubber having low heat generation and excellent heat resistance, ozone resistance (weather resistance), and crack growth resistance (crack growth resistance) , a rubber composition containing the copolymer, a rubber composition for a tire sidewall using the rubber composition for a tire sidewall member, a crosslinked rubber composition obtained by crosslinking the rubber composition, and a rubber composition using the rubber composition or the tire of the crosslinked rubber composition. Background technique [0002] At least two different monomers can be polymerized in the same...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/04B60C1/00C08K3/04C08L9/00
CPCB60C1/0025C08F236/04C08L15/00C08L101/00C08K2201/006C08K3/04C08L7/00C08L9/00C08F236/06C08F4/545C08L23/16
Inventor 堀川泰郎会田昭二郎奥利弗·塔迪芙松下纯子
Owner BRIDGESTONE CORP
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