Patent ID: 9315647
Filing Date: 2016-04-19
CPC Classification: B60C,C08C,C08F,C08K,C08L,Y02T

Claim Text:
1. A rubber composition, comprising a rubber component, silica, and a processing aid compound represented by formula (1) below, wherein the rubber component contains, based on 100% by mass of the rubber component, not less than 5% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, at least one terminal of the polymer being modified with at least one compound selected from the group consisting of a compound represented by formula (II) below, a compound containing a group represented by formula (III) below, a compound represented by formula (IV) below, a silicon compound containing at least one of a group represented by formula (V) below and a group represented by formula (VI) below, and a compound containing a group represented by formula (VII) below, wherein the silica is present in an amount of 5 to 150 parts by mass per 100 parts by mass of the rubber component, formula (I): wherein X 1 , X 2 , and X 3 each independently represent a group represented by formula (Ia) below, a hydroxy group, a hydrocarbyl group, or a substituted hydrocarbyl group, and at least one of X 1 , X 2 , and X 3 is a hydroxy group or a group represented by the following formula (Ia): wherein R 1 and R 2 each independently represent a C 1-6 hydrocarbyl group, a C 1-6 substituted hydrocarbyl group, a silyl group, or a substituted silyl group, and R 1 and R 2 may be bonded to each other to form a cyclic structure together with the nitrogen atom; formula (II): wherein n represents an integer of 1 to 10; R 11 , R 12 , and R 13 each independently represent a C 1-4 hydrocarbyl group or a C 1-4 hydrocarbyloxy group, and at least one of R 11 , R 12 , and R 13 is the hydrocarbyloxy group; and A 1 represents a nitrogen atom-bearing functional group; formula (III): wherein p represents an integer of 0 or 1; T represents a C 1-20 hydrocarbylene group or a C 1-20 substituted hydrocarbylene group; and A 2 represents a nitrogen atom-bearing functional group; formula (IV): wherein g represents an integer of 1 to 10; R 21 represents a hydrogen atom, a C 1-6 hydrocarbyl group, or a C 1-6 substituted hydrocarbyl group; A 3 represents an oxygen atom or the following group: —NR 22 — where R 22 represents a hydrogen atom or a C 1-10 hydrocarbyl group; and A 4 represents a functional group bearing at least one of a nitrogen atom and an oxygen atom; formulas (V), (VI) and (VII): wherein w represents an integer of 1 to 11, and A 5 represents a nitrogen atom-bearing functional group; formula (1): wherein R 101 represents a hydrogen atom, a branched or unbranched C 1-30 alkyl group, a branched or unbranched C 2-30 alkenyl group, a branched or unbranched C 6-30 aryl group, or a hydroxy group; R 102 and R 103 are the same as or different from each other and each represent a hydrogen atom, a branched or unbranched C 1-30 alkyl group, a branched or unbranched C 2-30 alkenyl group, a branched or unbranched C 2-30 alkynyl group, a branched or unbranched C 6-30 aryl group, or a group represented by formula (2) below, wherein a hydrogen atom of the alkyl group, alkenyl group, alkynyl group, or aryl group may be substituted by a hydroxy group or a carboxyl group; a pair of R 101 and R 102 , a pair of R 101 and R 103 , or a pair of R 102 and R 103 may form a cyclic structure; and d 1 is zero, wherein R 104 represents a branched or unbranched C 1-30 alkylene group; R 105 represents a hydrogen atom, a branched or unbranched C 1-30 alkyl group, a branched or unbranched C 2-30 alkenyl group, a branched or unbranched C 6-30 aryl group, or a hydroxy group; and d 2 represents an integer of 0 to 10.