Rubber composition and pneumatic tire,申请号US201214126746-传众专利搜索

Rubber composition and pneumatic tire

申请公布号：US9284433(B2)

申请号：US201214126746

申请日期：2012.05.24

申请公布日期：2016.03.15

申请人：

SUMITOMO RUBBER INDUSTRIES, LTD.

发明人：Tokimune Ryuichi;Hinohara Yuko

分类号：C08K3/36;B60C1/00;C08C19/44

主分类号：C08K3/36

代理机构：

Birch, Stewart, Kolasch & Birch, LLP

代理人：Birch, Stewart, Kolasch & Birch, LLP

地址：Kobe-Shi JP

摘要：The present invention provides a rubber composition that enables to improve the fuel economy, wet-grip performance, abrasion resistance, and processability in a balanced manner, and a pneumatic tire including the rubber composition. The present invention relates to a rubber composition containing silica and a conjugated diene polymer, the conjugated diene polymer being obtained by reacting a compound containing a nitrogen atom and/or a silicon atom with an active end of a copolymer obtained by polymerizing a monomer component including a conjugated diene compound and a silicon-containing vinyl compound using a polymerization initiator represented by the following formula (I):; wherein an amount of the conjugated diene polymer is not more than 90% by mass based on 100% by mass of a rubber component of the rubber composition, and an amount of the silica is 10 to 150 parts by mass per 100 parts by mass of the rubber component.

主权项：1. A rubber composition, comprising silica and a conjugated diene polymer, the conjugated diene polymer being obtained by reacting a compound containing at least one of a nitrogen atom and a silicon with an active terminal of the copolymer, wherein the compound containing at least one of a nitrogen atom and a silicon atom is at least one compound selected from the group consisting of (i) a compound of formula (IIIb):wherein R32 represents a hydrocarbyl group and R36 represents a hydrocarbylene group or a group in which a hydrocarbylene group and a group represented by —NR35— are bonded, where R35 represents a hydrocarbyl group or a hydrogen atom, (ii) a compound of formula (IIId):wherein R31 and R32 each represents a hydrocarbyl group, R37 represents a hydrocarbylene group, A represents an oxygen atom or —NR35— wherein R35 represents a hydrocarbyl group or a hydrogen atom, and R34 represents a hydrocarbyl group or a hydrogen atom, (iii) a compound of formula (IV):wherein R41 represents a hydrocarbyl group, R42 and R43 each represents a hydrocarbyl group or a hydrocarbyloxy group, R44 and R45 each represents a hydrocarbyl group, and j represents an integer of 1 to 5, (iv) a tris[(alkoxysilyl)alkyl]isocyanurate compound, and (v) an N,N-dialkyl-substituted carboxylic acid amide dialkyl acetal compound, wherein said copolymer is obtained by polymerizing a monomer component including a conjugated diene compound and a silicon-containing vinyl compound using a polymerization initiator represented by the following formula (I):wherein i represents 0 or 1; R11 represents a C7-80 hydrocarbylene group; R12 and R13 each represent a hydrocarbyl group, or R12 and R13 can be joined together to represent a hydrocarbylene group; and M represents an alkali metal atom, wherein the silicon-containing vinyl compound is represented by the formulawherein X1, X2, and X3 each represents a hydrocarbyl group or a group of the formula —NR22R23 wherein R22 and R23 are each an alkyl group, provided that at least one of X1, X2, and X3 is a group of the formula —NR22R23, wherein an amount of the conjugated diene polymer is 25 to 80% by mass based on 100% by mass of a rubber component of the rubber composition, and an amount of the silica is 10 to 150 parts by mass per 100 parts by mass of the rubber component.