US9683067B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9683067-B2 |
| Application number | US-201414777652-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 20, 2014 |
| Priority date | Mar 22, 2013 |
| Publication date | Jun 20, 2017 |
| Grant date | Jun 20, 2017 |
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A nitrile group-containing copolymer rubber which has a hydroxyl group, carboxyl group, or carbon-carbon double bond at an end carbon atom or on a carbon atom which bonds with the end carbon atom is provided. The nitrile group-containing copolymer rubber is preferably obtained by a metathesis reaction. A nitrile group-containing copolymer rubber which is excellent in cross-linkability can be provided.
Opening claim text (preview).
The invention claimed is: 1. A method of production of a nitrile group-containing copolymer rubber, wherein the nitrile group-containing copolymer rubber has a carboxyl group at an end carbon atom or a carbon atom which is bonded with the end carbon atom or the nitrile group-containing copolymer rubber has carbon-carbon double bond at an end carbon atom or a carbon atom which is bonded with the end carbon atom, the method comprising: causing a metathesis reaction of a raw nitrile group-containing copolymer rubber in the presence of a chain transfer agent which has at least one double bond and at least one carboxyl group or in the presence of a chain transfer agent which has two or more double bonds to form the nitrile group-containing copolymer rubber. 2. The method according to claim 1 , wherein the metathesis reaction of the raw nitrile group-containing copolymer rubber is performed using a ruthenium catalyst or osmium catalyst as a metathesis catalyst. 3. The method according to claim 1 , wherein the nitrile group-containing copolymer rubber has an iodine value of 120 or less. 4. The method according to claim 1 , wherein the nitrile group-containing copolymer rubber has a weight average molecular weight (Mw) of 300,000 or less.
with hydroxy radicals · CPC title
Hydrogenation · CPC title
Depolymerisation · CPC title
Catalysts comprising hydrides, coordination complexes or organic compounds (catalyst compositions used only in polymerisation reactions C08 {; catalytic antibodies C12N9/0002}) · CPC title
Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition · CPC title
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