RUBBER COMPOSITION AND CROSS-LINKED RUBBER

• US 20130280459A1
• Filed: 12/26/2011
• Published: 10/24/2013
• Est. Priority Date: 12/27/2010
• Status: Abandoned Application

• Current Assignee: ZEON Corporation
• Original Assignee: ZEON Corporation
• Inventors: Nakashima, Tomonori, Sakamoto, Masato, Emori, Nobuyoshi, Mori, Kentarou
• Application Number:
  US13/976,211
• Publication Number:
  US 20130280459A1
• Time in Patent Office: Days
• US Class Current: 428/36.8
• CPC Class Codes: C08G 77/04 Polysiloxanes
• CPC Class Codes: C08L 13/00 Compositions of rubbers containing carboxyl groups
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: Y10T 428/1386 Natural or synthetic rubber or rubber-like compound containing

Abstract

A nitrile rubber composition containing a carboxyl group-containing nitrile rubber and a reactive silicone oil and cross-linked rubber obtained by using that nitrile rubber composition are provided. Further, a rubber composition for sliding member use containing a carboxyl group-containing rubber which contains carboxyl group-containing monomer units in a ratio of 0.1 to 20 wt %, a content ratio of monomer units which have unsaturated carbon-carbon double bonds of 20 wt % or less, and a content ratio of monomer units which have halogen atoms of 5 wt % or less and a reactive silicone oil is provided.

Claims

1. A nitrile rubber composition containing a carboxyl group-containing nitrile rubber and a reactive silicone oil.

2. The nitrile rubber composition as set forth in claim 1, wherein said carboxyl group-containing nitrile rubber has an iodine value of 120 or less.

3. The nitrile rubber composition as set forth in claim 1, wherein said carboxyl group-containing nitrile rubber contains α

,β

-ethylenically unsaturated nitrile monomer units 5 to 60 wt %, carboxyl group-containing monomer units 0.1 to 20 wt %, and conjugated diene monomer units 15 to 94.9 wt %.

4. The nitrile rubber composition as set forth in claim 1, wherein said reactive silicone oil has at least one reactive group which is selected from the group consisting of a hydroxyl group, amino group, mercapto group, epoxy group, carboxyl group, acrylic group, and methacryl group.

5. The nitrile rubber composition as set forth in claim 1 further containing silica.

9. A cross-linked rubber obtained by cross-linking the nitrile rubber composition as set forth in claim 1.

10. The cross-linked rubber as set forth in claim 9, which is a seal member, belt, hose, or gasket.

6. A rubber composition for sliding member use containing

a carboxyl group-containing rubber which has carboxyl group-containing monomer units in a ratio of 0.1 to 20 wt %, a content ratio of monomer units which have unsaturated carbon-carbon double bonds of 20 wt % or less, and a content ratio of monomer units which have halogen atoms of 5 wt % or less and

a reactive silicone oil.

7. The rubber composition for sliding member use as set forth in claim 6, wherein said carboxyl group-containing rubber is a highly saturated nitrile rubber which contains α

,β

-ethylenically unsaturated nitrile monomer units in a ratio of 5 to 60 wt %.

8. The rubber composition for sliding member use as set forth in claim 6, wherein said reactive silicone oil has at least one reactive group which is selected from the group consisting of a hydroxyl group, amino group, mercapto group, epoxy group, carboxyl group, acrylic group, and methacryl group.

11. A cross-linked rubber for sliding member use obtained by cross-linking the rubber composition for sliding member use as set forth in claim 6.

12. The cross-linked rubber for sliding member use as set forth in claim 11, which is a seal member for sliding parts.