公开(公告)号：US10968287B2

公开(公告)日：2021-04-06

申请号：US16476403

申请日：2018-01-18

Applicant: ZEON CORPORATION

Inventor： Kentaro Ono ,  Chikara Katano ,  Yasuaki Watanabe

IPC: C08C19/02

Abstract: A method for producing a hydrogenated conjugated diene polymer latex includes: a hydrogenation step of dissolving or dispersing a hydrogenation catalyst containing a platinum group element in a latex of a conjugated diene polymer to hydrogenate a carbon-carbon unsaturated bond in the polymer; an insoluble complex formation step of complexing the platinum group element with a complexing agent to form an insoluble complex; and an insoluble complex removing step of continuously feeding the latex which has undergone the insoluble complex formation step to a centrifuge machine and continuously performing a centrifugation operation to continuously remove the insoluble complex from the latex and continuously discharge the insoluble complex out of the centrifuge machine. In the insoluble complex removal step the feed rate of the latex to the centrifuge machine is adjusted to 0.5 to 15 m3/hour, and the centrifugal force in the centrifugation operation is adjusted to 200 to 10,000 G.

公开(公告)号：US12110348B2

公开(公告)日：2024-10-08

申请号：US17419166

申请日：2019-12-25

Applicant: ZEON CORPORATION

Inventor： Sayaka Inoue ,  Kentaro Ono

IPC: C08C19/02

CPC classification number: C08C19/02

Abstract: A carboxyl group-containing nitrile rubber having an iodine value of 120 or less, wherein the content of sodium is 1500 ppm by weight or less, the total content of calcium, magnesium, and aluminum is 350 ppm by weight or less, and the storage elastic modulus at 140° C. is 350 kPa or more.

公开(公告)号：US11225566B2

公开(公告)日：2022-01-18

申请号：US16979571

申请日：2019-03-12

Applicant: ZEON CORPORATION

Inventor： Kentaro Ono

IPC: C08L9/04 ,  C08L33/08 ,  C08F8/04 ,  C08F236/12 ,  C09J109/04 ,  C08K5/37 ,  C08C19/00 ,  C08C3/02 ,  C08C1/15

Abstract: A latex including: a nitrile rubber containing an α,β-ethylenically unsaturated nitrile monomer unit in a content of 8 to 50 wt % and an α,β-ethylenically unsaturated dicarboxylic acid monoester monomer unit in a content of 1 to 10 wt %, and having an iodine value of 120 g/100 g or less; and a benzisothiazoline-based compound represented by the following general formula (1), wherein the content of the benzisothiazoline-based compound is 50 ppm by weight or more, with respect to the nitrile rubber, and a redox potential of the latex is 80 to 800 mV. In the general formula (1) mentioned above, R1 represents a hydrogen atom, or a substituted or unsubstituted organic group, R2 each independently represents a hydrogen atom, or a substituted or unsubstituted organic group, and “n” represents an integer of 0 to 4.