Method for manufacturing hydrogenated nitrile rubber
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United States of America Patent
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Oct 5, 2021
Grant Date -
N/A
app pub date -
Nov 2, 2018
filing date -
Nov 10, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A method produces a hydrogenated nitrile rubber having an iodine value of 120 or less, the method having a first coagulation step of adding a halogen atom-free metal salt as a coagulant to a nitrile rubber latex to form a nitrile rubber coagulum; a solution preparation step of dissolving the nitrile rubber coagulum in an organic solvent to prepare a nitrile rubber solution; a hydrogenation step of subjecting the nitrile rubber solution to a hydrogenation reaction to afford a hydrogenated nitrile rubber solution; and a second coagulation step of adding a divalent metal salt as a coagulant to the hydrogenated nitrile rubber solution to form a hydrogenated nitrile rubber coagulum.
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