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Copolymer, Rubber Composition And Pneumatic Tire

一种共聚物、化合物的技术，应用在特殊轮胎、轮胎零部件、运输和包装等方向，能够解决分子量高、降低、不容易抑制低温特性等问题，达到改良tanδ的平衡、抑制硬度的降低的效果

Inactive Publication Date: 2016-06-29
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this copolymer is used as a rubber component, it has a high molecular weight, and it is not easy to suppress a decrease in low-temperature characteristics

Method used

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  • Copolymer, Rubber Composition And Pneumatic Tire
  • Copolymer, Rubber Composition And Pneumatic Tire
  • Copolymer, Rubber Composition And Pneumatic Tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0056] Examples are shown below, but the present invention is not limited to these Examples.

[0057] The components used in Examples and Comparative Examples are as follows.

[0058] ・SBR: "SL563" manufactured by JSR Co., Ltd.

[0059] ・Modified SBR: Alkoxy and amino terminal modified SBR, "HPR350" manufactured by JSR Co., Ltd.

[0060] NR: RSS#3

[0061] BR: "UBEPOL BR150B (ウベポル BR150B)" manufactured by Ube Industries Co., Ltd.

[0062] ・Silica: "NipsilAQ (ニツプシルAQ)" manufactured by Tosoh Silica Co., Ltd.

[0063] ・Carbon black: "Seast3 (シ一スト3)" manufactured by Tokai Tanso Co., Ltd.

[0064] - Silane coupling agent 1: Bis(3-triethoxysilylpropyl) tetrasulfide, "Si69" manufactured by Evonik Degussa Co., Ltd.

[0065] ・Silane coupling agent 2: Mercaptosilane, "Si363" manufactured by Evonik Degussa

[0066] ・Zinc white: "Zinc white 1 type" manufactured by Mitsui Metal Mining Co., Ltd.

[0067] ・Anti-aging agent: "Nocrac 6C (ノクラツク6C)" manufactured by Ouchi Shinko Chemical C...

Synthetic example 1

[0079] [Synthesis Example 1: Synthesis of Polymer 1 (Liquid Copolymer)]

[0080] 60 g of 4-tert-butylstyrene, 12.8 g of β-myrcene (manufactured by Tokyo Chemical Industry Co., Ltd.), 0.77 g of azobisisobutyronitrile, and 50 mL of toluene were mixed, nitrogen was bubbled for 1 hour, and the reaction solution was placed in Hold at 70°C for 24 hours. The resulting solution was purified by reprecipitation in methanol to obtain 66 g of Polymer 1 . The polymerization conversion rate (percentage of "amount produced / amount charged") was 91%. The obtained polymer 1 had Mw of 22,000, Mn of 12,000, and Mw / Mn of 1.83, and was a fluid copolymer at normal temperature. In addition, Tg is -5 degreeC.

[0081] through 13 C-NMR (400MHzCDCl 3 ) measurement confirms that polymer 1 is a random copolymer having monomer units represented by the following formula (3-1), formula (4-1), formula (5-1) and formula (6-1), according to Each content obtained by the integral ratio of each peak is: the ...

Synthetic example 2

[0085] [Synthesis Example 2: Synthesis of Polymer 2 (Liquid Copolymer)]

[0086] The molar ratio of 4-tert-butylstyrene and β-myrcene used in the synthesis of Polymer 1 was set to 4-tert-butylstyrene / β-myrcene=50 / 50. Polymer 2 was obtained in the same manner as in Synthesis Example 1. The polymerization conversion rate was 88%. The obtained polymer 2 had Mw of 20,000, Mn of 12,000, and Mw / Mn of 1.67, and was a fluid copolymer at normal temperature. In addition, Tg was -16 degreeC. The content of each monomer unit of polymer 2 is: the monomer unit of formula (3-1) is 40 mol%, the monomer unit of formula (4-1) is 45 mol%, the unit of formula (5-1) The monomer unit is 3 mol%, the monomer unit of the formula (6-1) is 12 mol%, and the total of the formulas (4-1), (5-1) and (6-1) is 60 mol%.

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Abstract

The invention provides a copolymer, which is used for improving balance between tan delta at 0 DEG C and tan delta at 60 DEG C when the copolymer is used for a rubber composition. The copolymer includes a monomer unit (a) derived from a compound represented by the formula (1) and a monomer unit (b) derived from a compound represented by the formula (2), and having a weight average molecular weight (Mw) of from 1,000 to 50,000 wherein R1 represents a hydrogen atom or a methyl group, R2 represents a hydrogen atom, a linear alkyl group having from 1 to 8 carbon atoms, or a branched alkyl group having from 3 to 8 carbon atoms, R3, R4, R5, R6, R7 and R8 may be the same or different, at least one of those groups represents an aliphatic hydrocarbon group having from 3 to 8 carbon atoms, and the remainder represents a hydrogen atom or an aliphatic hydrocarbon group having 1 or 2 carbon atoms.

Description

technical field [0001] The present invention relates to a copolymer containing a monomer unit derived from an aromatic vinyl compound and a monomer unit derived from a compound containing a conjugated diene, a rubber composition containing the copolymer, and an inflator using the rubber composition tire. Background technique [0002] Conventionally, for example, rubber compositions used in tires have required a high level of balance between grip performance on wet road surfaces (wet grip performance) and rolling resistance performance contributing to low fuel consumption. Generally, the wet grip performance uses tan δ at 0° C. as an index, and the larger the performance, the better the performance. For the rolling resistance performance, tan δ at 60° C. is used as an index, and the smaller the performance, the better the performance. Since wet grip performance and rolling resistance performance have opposite characteristics, it is not easy to simultaneously improve them. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/12C08F236/10C08F212/08C08L9/06C08L9/00C08L25/10C08L25/16C08L47/00C08K13/02B60C1/00
CPCC08L9/06C08F212/12C08F236/22C08L7/00C08L9/00C08L25/16B60C1/00C08F212/08C08F236/10C08L2205/02C08L2205/03C08K13/02C08L47/00C08L25/10
Inventor 福西智史由里贵史
Owner TOYO TIRE & RUBBER CO LTD