Organosilicon compounds and rubber compositions made by using the same

• US 7,732,517 B2
• Filed: 11/21/2006
• Issued: 06/08/2010
• Est. Priority Date: 11/25/2005
• Status: Active Grant

• Current Assignee: Bridgestone Corporation
• Original Assignee: Bridgestone Corporation
• Inventors: Fukushima, Yasuo
• Primary Examiner(s): Jagannathan; Vasu
• Assistant Examiner(s): Sheh; Anthony H
• Application Number:
  US12/094,562
• Publication Number:
  US 20090247683A1
• Time in Patent Office: 1,295 Days
• Field of Search: 528/33, 528/35, 528/30, 528/32, 528/38, 556/427, 524/262
• US Class Current: 524/262
• CPC Class Codes: B60C 1/0016 Compositions of the tread
• CPC Class Codes: C07F 7/1804 Compounds having Si-O-C linkages Si-O-acyl linkages C07F7/1896
• CPC Class Codes: C08K 2003/2227 of aluminium
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08K 5/5415 containing at least one Si—O bond
• CPC Class Codes: C08K 5/544 containing nitrogen
• CPC Class Codes: C08K 5/548 containing sulfur C08K5/5477 takes precedence
• CPC Class Codes: C08L 21/00 Compositions of unspecified rubbers
• CPC Class Codes: C08L 7/00 Compositions of natural rubber
• CPC Class Codes: C08L 9/06 Copolymers with styrene
• CPC Class Codes: Y10T 152/10495 Pneumatic tire or inner tube

Abstract

An organosilicon compound having a structure represented by following general formula:

R¹: methyl group or ethyl group, R²: a branched or linear, saturated or unsaturated aliphatic hydrocarbon group having 3 to 8 carbon atoms, n: 0.5˜2.5 (an average composition), R³: a divalent hydrocarbon group of —CH₂—, —CH₂CH₂—, —CH₂CH₂CH₂—, —CH₂CH₂CH₂CH₂—, —CH₂CH₂CH₂CH₂CH₂—, —CH(CH₃)—, —CH₂CH(CH₃)—, —C(CH₃)₂—, —CH(C₂H₅)—, —CH₂CH₂CH(CH₃)— or —CH₂CH(CH₃)CH₂—, X: S, S(C═O)—R⁴, SH or NH_(3−p), and R⁴: a branched or linear, saturated or unsaturated aliphatic hydrocarbon group having 1 to 30 carbon atoms. When X═S, p=2 and m=1˜10. When X═S(C═O)—R⁴, p=1 and m=1. When X═SH, p=1 and m=1. When X═NH_(3−p), p=1˜3 and m=1. The organosilicon compound simultaneously suppresses discharge of volatile alcohols generated during the reaction with an inorganic filler and exhibits great reactivity with the inorganic filler.

Claims

1. An organosilicon compound having a structure represented by following general formula:

2. A rubber composition which comprises a rubber component comprising at least one rubber selected from natural rubber and synthetic rubbers, an inorganic filler in an amount of 1 to 150 parts by mass based on 100 parts by mass of the rubber component and the organosilicon compound described in claim 1 in an amount of 1 to 30% by mass based on the amount of the inorganic filler.

3. A rubber composition according to claim 2, wherein the inorganic filler is silica and/or aluminum hydroxide.

4. A pneumatic tire prepared by using the rubber composition described in claim 2.

5. A pneumatic tire prepared by using the rubber composition described in claim 3.