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    ACRYLIC RUBBER BALE EXCELLENT IN STORAGE STABILITY AND PROCESSABILITY
    1.
    发明申请
    ACRYLIC RUBBER BALE EXCELLENT IN STORAGE STABILITY AND PROCESSABILITY 有权

    公开(公告)号：US20220259345A1

    公开(公告)日：2022-08-18

    申请号：US17626067

    申请日：2020-07-17

    Applicant: ZEON CORPORATION

    Inventor： Hirofumi MASUDA ,  Takafumi KAWANAKA

    IPC: C08F220/10 ,  C08K3/02 ,  C08K3/04

    Abstract: Acrylic rubber bale excellent in storage stability and processability, a method for producing the same, a rubber mixture obtained by mixing the acrylic rubber bale, and a cross-linked product of the rubber mixture are provided. The acrylic rubber bale includes an acrylic rubber having a reactive group and a weight average molecular weight (Mw) of 100,000 to 5,000,000, wherein an amount of gel insoluble in methyl ethyl ketone is 60% by weight or less, and a specific gravity is 0.8 or more.

    ACRYLIC RUBBER EXCELLENT IN WATER RESISTANCE
    2.
    发明申请
    ACRYLIC RUBBER EXCELLENT IN WATER RESISTANCE 有权

    公开(公告)号：US20220259347A1

    公开(公告)日：2022-08-18

    申请号：US17625803

    申请日：2020-06-05

    Applicant: ZEON CORPORATION

    Inventor： Hirofumi MASUDA ,  Takafumi KAWANAKA

    IPC: C08F220/18 ,  C08K3/04

    Abstract: An acrylic rubber excellent in water resistance and a method for producing the same are provided. An acrylic rubber composed of: 70 to 99.9 wt % of a bonding unit derived from (meth) acrylic acid ester; 0.1 to 10 wt % of a bonding unit derived from a cross-linkable monomer; and if necessary, 0 to 20 wt % of a bonding unit derived from another monomer, wherein the ash content is 0.5 wt % or less, the total amount of magnesium and phosphorus in the ash is 30 wt % or more, a ratio of the magnesium to the phosphorus ([Mg]/[P]) by weight is 0.4 to 2.5, and Mooney viscosity (ML1+4, 100° C.) of the rubber is 10 to 150 is particularly excellent in water resistance, and a rubber cross-linked product using the same is also excellent in physical properties.

    ACRYLIC RUBBER SHEET EXCELLENT IN STORAGE STABILITY AND PROCESSABILITY
    3.
    发明申请
    ACRYLIC RUBBER SHEET EXCELLENT IN STORAGE STABILITY AND PROCESSABILITY 有权

    公开(公告)号：US20220235190A1

    公开(公告)日：2022-07-28

    申请号：US17626439

    申请日：2020-06-05

    Applicant: ZEON CORPORATION

    Inventor： Hirofumi MASUDA ,  Takafumi KAWANAKA

    IPC: C08J5/18 ,  C08L33/08 ,  C08F6/22 ,  C08F6/16 ,  C08F2/24 ,  C08K5/13 ,  B29C48/00

    Abstract: An acrylic rubber sheet excellent in storage stability and processability, a method for producing the same, an acrylic rubber bale obtained by laminating the sheets, a mixture obtained by mixing the acrylic rubber sheet and the acrylic rubber bale, a method for producing the mixture and a rubber cross-linking product obtained by cross-linking the mixture. The acrylic rubber sheet comprises, an acrylic rubber mainly composed of a (meth) acrylic acid ester and having a weight average molecular weight (Mw) of 100,000 to 5,000,000 and a ratio (Mz/Mw) of a Z-average molecular weight (Mz) and a weight average molecular weight (Mw) is 1.3 or more, and the acrylic rubber sheet contains a phenolic anti-aging agent, and a gel amount is 50 wt % or less. The acrylic rubber sheet is extremely excellent in storage stability and processability and the sheet can be easily produced by the claimed method.

    ACRYLIC RUBBER BALE EXCELLENT IN PROCESSABILITY AND WATER RESISTANCE
    8.
    发明申请
    ACRYLIC RUBBER BALE EXCELLENT IN PROCESSABILITY AND WATER RESISTANCE 有权

    公开(公告)号：US20220251265A1

    公开(公告)日：2022-08-11

    申请号：US17626402

    申请日：2020-06-05

    Applicant: ZEON CORPORATION

    Inventor： Hirofumi MASUDA ,  Takafumi KAWANAKA

    IPC: C08F220/12 ,  C08K11/00

    Abstract: Acrylic rubber bale having remarkably improved storage stability and water resistance without deteriorating cross-linking properties, a method of production, a rubber mixture obtained by mixing the acrylic rubber bale, a method of production, and a rubber cross-linked product obtained by cross-linking the same is provided. The acrylic rubber bale includes an acrylic rubber, and the acrylic rubber is mainly composed of (meth) acrylic acid ester, and has a weight average molecular weight of 100,000 to 5,000,000, and has a ratio of a Z-average molecular weight and a weight average molecular weight of 1.3 or more, where an ash content is 0.6% by weight or less, and the ash contains a periodic table group 2 metal and phosphorus, and a phosphorus content is 10% by weight or more, and the ratio of the periodic table group 2 metal to phosphorus is in the range of 0.6 to 2 molar ratio.

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