NITRILE COPOLYMER RUBBER COMPOSITION

• US 20170101498A1
• Filed: 03/24/2015
• Published: 04/13/2017
• Est. Priority Date: 03/26/2014
• Status: Active Application

• Current Assignee: ZEON Corporation
• Original Assignee: ZEON Corporation
• Inventors: TSUKADA, Akira, NAKAMURA, Tadashi
• Granted Patent: US 10,266,628 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 2305/30 Fillers, e.g. particles, powders, beads, flakes, spheres, chips
• CPC Class Codes: B32B 2305/72 Cured, e.g. vulcanised, cross-linked
• CPC Class Codes: B32B 2307/7265 Non-permeable
• CPC Class Codes: B32B 2439/00 Containers; Receptacles closures therefor B32B2435/00
• CPC Class Codes: B32B 25/14 comprising synthetic rubber copolymers B32B25/18 and B32B25/20 take precedence
• CPC Class Codes: B32B 2581/00 Seals; Sealing equipment; Gaskets
• CPC Class Codes: B32B 2597/00 Tubular articles, e.g. hoses, pipes
• CPC Class Codes: C08C 19/02 Hydrogenation
• CPC Class Codes: C08F 220/46 with carboxylic acids, sulfonic acids or salts thereof
• CPC Class Codes: C08F 220/48 with nitrogen-containing monomers
• CPC Class Codes: C08F 236/12 with nitriles
• CPC Class Codes: C08F 2500/17 Viscosity
• CPC Class Codes: C08F 2800/20 as weight or mass percentages
• CPC Class Codes: C08F 2810/20 leading to a crosslinking, either explicitly or inherently
• CPC Class Codes: C08K 2003/2296 of zinc
• CPC Class Codes: C08K 2201/016 Additives defined by their aspect ratio
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 3/346 Clay
• CPC Class Codes: C08L 27/06 : Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C08L 33/04 : Homopolymers or copolymers of esters C08L43/04 takes precedence
• CPC Class Codes: C08L 33/10 : Homopolymers or copolymers of methacrylic acid esters
• CPC Class Codes: C08L 33/18 : Homopolymers or copolymers of nitriles
• CPC Class Codes: C08L 33/20 : Homopolymers or copolymers of acrylonitrile C08L55/02 takes precedence
• CPC Class Codes: C08L 35/04 : Homopolymers or copolymers of nitriles C08L35/06, C08L35/08 take precedence
• CPC Class Codes: C08L 9/02 : Copolymers with acrylonitrile
• CPC Class Codes: C08L 9/04 : Latex
• CPC Class Codes: F16L 11/04 : made of rubber or flexible plastics

Abstract

A nitrile copolymer rubber composition including a nitrile copolymer rubber (A) containing 35 to 80 wt % of α,β-ethylenically unsaturated nitrile monomer units (a1), 19.5 to 64.5 wt % of conjugated diene monomer units (a2), and 0.5 to 20 wt % of α,β-ethylenically unsaturated carboxylic acid monomer units (a3) and an inorganic filler (B) with an aspect ratio of 30 to 2,000, wherein a content of the inorganic filler (B) with respect to 100 parts by weight of the nitrile copolymer rubber (A) is 1 to 200 parts by weight is provided.

Claims

1. A nitrile copolymer rubber composition comprising a nitrile copolymer rubber (A) containing 35 to 80 wt % of α

,β

-ethylenically unsaturated nitrile monomer units (a1), 19.5 to 64.5 wt % of conjugated diene monomer units (a2), and 0.5 to 20 wt % of α

,β

-ethylenically unsaturated carboxylic acid monomer units (a3) and an inorganic filler (B) with an aspect ratio of 30 to 2,000,

wherein a content of the inorganic filler (B) with respect to 100 parts by weight of the nitrile copolymer rubber (A) is 1 to 200 parts by weight.

2. The nitrile copolymer rubber composition according to claim 1, wherein the α

,β

-ethylenically unsaturated carboxylic acid monomer units (a3) are α

,β

-ethylenically unsaturated monocarboxylic acid monomer units having 3 to 8 carbon atoms and/or butenedioic acid mono chain alkyl ester monomer units having 5 to 15 carbon atoms.

3. The nitrile copolymer rubber composition according to claim 1, wherein the nitrile copolymer rubber (A) is a hydrogenated nitrile copolymer rubber where at least part of the carbon-carbon unsaturated bond parts is hydrogenated.

4. The nitrile copolymer rubber composition according to claim 1, further comprising 10 to 150 parts by weight of a vinyl chloride resin and/or acrylic resin with respect to 100 parts by weight of the nitrile copolymer rubber (A).

5. A cross-linkable nitrile copolymer rubber composition comprising the nitrile copolymer rubber composition according to claim 1 and a cross-linking agent.

6. A cross-linked rubber obtained by cross-linking the cross-linkable nitrile copolymer rubber composition according to claim 5.

7. The cross-linked rubber according to claim 6 which is a hose, seal, packing, or gasket.

8. A laminate comprised of two or more layers, at least one layer of which is comprised of the cross-linked rubber according to claim 6.