RUBBER CROSSLINKED PRODUCT

• US 20190330454A1
• Filed: 08/21/2017
• Published: 10/31/2019
• Est. Priority Date: 08/23/2016
• Status: Active Grant

• Current Assignee: ZEON Corporation
• Original Assignee: ZEON Corporation
• Inventors: UEDA, Eijun, ASADA, Misako, YAMAGISHI, Hidenori
• Granted Patent: US 10,968,335 B2
• Time in Patent Office: Days
• CPC Class Codes: B60C 1/00 Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
• CPC Class Codes: C08C 19/22 Incorporating nitrogen atoms into the molecule
• CPC Class Codes: C08C 19/25 Incorporating silicon atoms into the molecule
• CPC Class Codes: C08C 19/44 of polymers containing metal atoms exclusively at one or both ends of the skeleton
• CPC Class Codes: C08F 212/08 Styrene
• CPC Class Codes: C08F 236/06 Butadiene
• CPC Class Codes: C08F 236/10 with vinyl-aromatic monomers
• CPC Class Codes: C08G 77/442 containing vinyl polymer sequences
• CPC Class Codes: C08J 5/00 Manufacture of articles or shaped materials containing macromolecular substances manufacture of semi-permeable membranes B01D67/00 - B01D71/00
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08L 15/00 Compositions of rubber derivatives C08L11/00, C08L13/00 take precedence
• CPC Class Codes: C08L 2312/02 with dienes
• CPC Class Codes: C08L 2312/08 by silane
• CPC Class Codes: C08L 83/10 Block- or graft-copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00
• CPC Class Codes: C08L 9/00 Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
• CPC Class Codes: C08L 9/06 Copolymers with styrene

Abstract

A cross-linked rubber obtained by crosslinking a rubber composition containing a conjugated diene rubber and an inorganic filler, wherein when a loss tangent value of a non-interface component forming, of the cross-linked rubber ingredient, a portion other than an interface with the inorganic filler is represented as L(m) and a loss tangent value of an interface component forming, of the cross-linked rubber ingredient, an interface portion with the inorganic filler is represented as L(i), each loss tangent value being measured using an atomic force microscope in a state in which sinusoidal vibrations of 5 kHz are applied to the cross-linked rubber, the cross-linked rubber has a ratio L(i)/L(m) of 0.85 or less.

Claims

1. A cross-linked rubber obtained by crosslinking a rubber composition containing a conjugated diene rubber and an inorganic filler, wherein when a loss tangent value of a non-interface component forming, of the cross-linked rubber ingredient, a portion other than an interface with the inorganic filler is represented as L(m) and a loss tangent value of an interface component forming, of the cross-linked rubber ingredient, an interface portion with the inorganic filler is represented as L(i), each loss tangent value being measured using an atomic force microscope in a state in which sinusoidal vibrations of 5 kHz are applied to the cross-linked rubber, the cross-linked rubber has a ratio L(i)/L(m) of 0.85 or less.

2. The cross-linked rubber according to claim 1, wherein the conjugated diene rubber is a modified conjugated diene rubber having a modifying group.

3. The cross-linked rubber according to claim 2, wherein the conjugated diene rubber is a modified conjugated diene rubber having a modifying group derived from a silicon atom-containing modifying agent.

4. The cross-linked rubber according to claim 3, wherein the conjugated diene rubber is a modified conjugated diene rubber having a modifying group derived from a siloxane compound or a nitrogen-containing silane compound.

5. The cross-linked rubber according to claim 1, wherein the conjugated diene rubber has a glass transition temperature (Tg) of −

40 to −

10°

C.

6. The cross-linked rubber according to claim 1, wherein the conjugated diene rubber has a vinyl bond content in a conjugated diene monomer unit of 0 to 70 mol %.

7. The cross-linked product according to claim 1, wherein the inorganic filler has a content of 10 to 200 parts by weight with respect to 100 parts by weight of the rubber ingredient including the conjugated diene rubber in the rubber composition.

8. The cross-linked rubber according to claim 1, wherein the inorganic filler is silica.

9. A tire comprising the cross-linked rubber according to claim 1.