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Modified conjugated diene polymer composition and tire

A conjugated diene, polymer technology, used in special tires, tire parts, transportation and packaging, etc., can solve the problems of reduced handling stability, insufficient effect, and reduced rigidity, and achieve a balance of handling stability excellent effect

Active Publication Date: 2019-02-26
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, it is well known that if inorganic fillers such as silica are used, the storage modulus, fracture resistance, abrasion resistance, etc. will decrease.
In order to improve this disadvantage, the compounding of silane coupling agent is usually carried out, but sufficient effect has not yet been obtained
[0007] In particular, the storage modulus is an important physical property of rubber. For example, when the rubber is used for tire treads, etc., if the storage modulus is insufficient, the rigidity will decrease, which will lead to a decrease in steering stability.

Method used

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  • Modified conjugated diene polymer composition and tire
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  • Modified conjugated diene polymer composition and tire

Examples

Experimental program
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Effect test

preparation example Construction

[0079] As polyvinylaromatic compounds used in the preparation of polyfunctional anionic polymerization initiators, the following can be mentioned, but not limited to: for example, o-, m- and p-divinylbenzene, o-, m- and p-diisopropenylbenzene, 1,2,4-trivinylbenzene, 1,2-vinyl-3,4-dimethylbenzene, 1,3-divinylnaphthalene, 1,3,5- Trivinylnaphthalene, 2,4-divinylbiphenyl, 3,5,4'-trivinylbiphenyl, 1,2-divinyl-3,4-dimethylbenzene, 1,5,6 - Trivinyl-3,7-diethylnaphthalene and the like.

[0080] These substances may be used alone or in combination of two or more.

[0081] Particular preference is given to divinylbenzene, diisopropenylbenzene and also mixtures of their ortho-, meta- and para-isomers.

[0082] In the preparation of the polyfunctional anionic polymerization initiator, a conjugated diene compound and / or a monoaromatic vinyl compound can be used together with the above-mentioned polyvinyl aromatic compound.

[0083]Examples of conjugated diene compounds include, but are ...

Embodiment

[0440] Hereinafter, specific examples and comparative examples will be given to describe this embodiment in more detail, but this embodiment is not limited to the following examples at all.

[0441] In addition, in Examples and Comparative Examples, the measurement of the structure and physical property of a polymer was performed by the method shown below.

[0442] (Physical property 1) Amount of bonded styrene

[0443] Using the modified conjugated diene polymer as a sample, 100 mg of the sample was adjusted to 100 mL with chloroform, and dissolved to prepare a measurement sample.

[0444] Based on the absorption of the phenyl group of styrene at the ultraviolet absorption wavelength (around 254 nm), the amount of bonded styrene (mass %) relative to 100 mass % of the sample, that is, the modified conjugated diene polymer (manufactured by Shimadzu Corporation) was measured. Spectrophotometer "UV-2450" manufactured by our company).

[0445] (Physical property 2) Microstructur...

manufacture example 1-1

[0487] Using a temperature-controllable autoclave with an internal volume of 10 L equipped with a stirrer and a jacket as a reactor, 777 g of 1,3-butadiene, 273 g of styrene, 4,800 g of cyclohexane, and 2,2 - 0.81 g of bis(2-tetrahydrofuryl)propane was charged into the reactor, and the inner temperature of the reactor was kept at 42°C.

[0488] A cyclohexane solution containing 9.5 mmol of n-butyllithium as a polymerization initiator was supplied to the reactor.

[0489] After the polymerization reaction started, the temperature inside the reactor started to rise due to the heat generated by the polymerization, and finally the temperature inside the reactor reached 73°C. After reaching the peak of the reaction temperature for 2 minutes, add 4.3 mmol of tetraglycidyl-1,3-bisaminomethylcyclohexane to the reactor, and stir at 72°C for 2 minutes to carry out the modification reaction. Add 30 g (30 parts by mass) of high-density oil with the trade name "Vivamax 5000" manufactured ...

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Abstract

The invention relates to a modified conjugated diene polymer composition and a tire. The modified conjugated diene polymer composition is excellent in the balance of the rolling resistance characteristic, driving stability, and wet grip nature. The modified conjugated diene polymer composition comprises a rubber composition and oil (ii). The rubber composition contains a modified conjugated dienepolymer (i). The modified conjugated diene polymer (i) has a ratio Mw / Mn of the weight average molecular weight Mw obtained by gel permeation chromatography (GPC) to number average molecular weight Mnless than 1.5, and has adsorptivity to a silica system column. The density of the oil (ii) is greater than 1.0 g / cm3.

Description

technical field [0001] The present invention relates to a modified conjugated diene polymer composition and a tire. Background technique [0002] In recent years, with emphasis on resource saving and environmental strategies, the level of demand for automotive tires with excellent fuel efficiency is increasing. [0003] As a method of manufacturing a tire excellent in fuel consumption, the following method is known: the tread is made into a two-layer structure of a crown on the contact surface side and a tread base on the opposite side, and the rubber constituting the tread As the material, in order to reduce the rolling resistance and suppress the energy loss of the tire, a rubber material that can form a cross-linked rubber with excellent rolling resistance characteristics is used. [0004] In view of the strong demand for fuel-efficient tires, in order to obtain tires with more excellent fuel-efficient properties, techniques for improving the rolling resistance character...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/00C08L91/00C08L91/06C08K13/02C08K3/04C08K3/36C08F236/10C08F212/08C08C19/25B60C1/00
CPCB60C1/0016C08C19/25C08F236/10C08L15/00C08L2205/02C08L2205/035C08F212/08C08L91/00C08L91/06C08K13/02C08K3/04C08K3/36Y02T10/86C08L9/00C08L21/00C08L47/00C08L53/025C08K3/013
Inventor 齐藤齐
Owner ASAHI KASEI KK
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