# US 10,865,293 B2 · Cross-linkable rubber composition, rubber crosslinked product, and complex

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,865,293 B2
- Document ID: US10865293B2
- Status: Granted
- Kind: B2
- Application number: 16/342,827
- Filed: 2017-10-24
- Published: 2019-08-22
- Granted: 2020-12-15
- Earliest claimed: 2016-10-31
- Assignees: Zeon Corporation
- Applicants: Zeon Corporation
- Inventors: Yoshio Fukumine
- Web page: https://patentgrep.com/patent/US10865293B2

## CPC

- C08F 220/1804: {C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate}
- C08F 222/26: of unsaturated alcohols {(C08F222/1006 takes precedence)}
- C08F 236/08: Isoprene
- C08F 236/12: with nitriles
- C08F 236/18: containing chlorine
- C08K 3/12: Hydrides
- C08K 3/22: of metals
- C08K 3/26: Carbonates; Bicarbonates
- C08K 5/17: Amines; Quaternary ammonium compounds
- C08L 9/02: Copolymers with acrylonitrile
- C08L 13/00: Compositions of rubbers containing carboxyl groups
- C08L 15/005: {Hydrogenated nitrile rubber}
- C08K 2003/2227: {of aluminium}
- C08K 2003/262: {Alkali metal carbonates}
- C08K 2003/267: {Magnesium carbonate}
- C08L 2312/00: Crosslinking
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A disclosed crosslinkable rubber composition includes a carboxyl group-containing nitrile rubber (A) containing a halogen or a halogen compound, and having an iodine value of 120 or less; a polyamine-based crosslinking agent (B); and a metal-based acid acceptor (C).

## Claims

### Claim 1

A crosslinkable rubber composition comprising:
a carboxyl group-containing nitrile rubber (A) containing a residual halogen or a halogen compound derived from a coagulant, the carboxyl group-containing nitrile rubber (A) having an iodine value of 120 or less;
a polyamine-based crosslinking agent (B); and
a metal-based acid acceptor (C) selected from aluminum hydroxide and hydrotalcite.

### Claim 2 (depends on 1)

The crosslinkable rubber composition according to claim 1, wherein:
the carboxyl group-containing nitrile rubber (A) includes, based on 100 wt % of total monomer units in the carboxyl group-containing nitrile rubber (A):
5 to 60 wt % of α,β-ethylenically unsaturated nitrile monomer unit (a1),
0.5 to 12 wt % of α,β-ethylenically unsaturated dicarboxylic acid monoester monomer unit (a2), and
20 to 90 wt % of conjugated diene monomer unit (a3), and
at least a part of the conjugated diene monomer unit (a3) is hydrogenated.

### Claim 3 (depends on 1)

The crosslinkable rubber composition according to claim 1, wherein
the content of the metal-based acid acceptor (C) is 0.1 to 20 parts by weight with respect to 100 parts by weight of the carboxyl group-containing nitrile rubber (A).

### Claim 4 (depends on 1)

The crosslinkable rubber composition according to claim 1, wherein
the content of the metal-based acid acceptor (C) is 1 to 5 parts by weight with respect to 100 parts by weight of the carboxyl group-containing nitrile rubber (A).

### Claim 5 (depends on 1)

A rubber crosslinked product prepared by crosslinking the crosslinkable rubber composition according to claim 1.

### Claim 6 (depends on 5)

A complex comprising the rubber crosslinked product according to claim 5 complexed with metal.