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    Composite formed article comprising vulcanized rubber and thermoplastic elastomer and use thereof
    2.
    发明专利
    Composite formed article comprising vulcanized rubber and thermoplastic elastomer and use thereof 未知

    公开(公告)号：GB2417489A

    公开(公告)日：2006-03-01

    申请号：GB0523284

    申请日：2004-04-05

    Applicant: MITSUI CHEMICALS INC

    Inventor： IMAI TADASHI

    IPC: C08J5/12 ,  B29C45/00 ,  B29C45/14 ,  B29C70/84 ,  B29K19/00 ,  B32B25/04 ,  B60R13/06 ,  C08L21/00

    Abstract: A formed vulcanized rubber article (1) which comprises 2 to 10 wt % of an olefinic resin exhibiting a crystallinity of 10 % or more as measured with a differential scanning calorimeter (DSC); and a composite formed article which comprises said formed vulcanized rubber article (1) and, joined thereto, a formed article (2) comprising a thermoplastic elastomer containing more than 10% of an olefinic resin exhibiting a crystallinity of 10 % or more as measured with a differential scanning calorimeter (DSC) and having a gel content of 30 wt % or less. The formed vulcanized rubber article can form, through melt adhesion and without the use of an adhesive layer, a composite formed article which exhibits satisfactory adhesion strength and causes the parent material failure upon pealing. The above composite formed article is advantageously used for an interior or exterior material for an automobile, in particular, for a weatherstrip material.

    3.
    发明专利
    未知

    公开(公告)号：DE60016642T2

    公开(公告)日：2005-12-08

    申请号：DE60016642

    申请日：2000-02-02

    Applicant: MITSUI CHEMICALS INC

    Inventor： IMAI TADASHI ,  HASHIMOTO MIKIO ,  HARIMA SHIGERU

    IPC: C08L23/12 ,  C08F4/658 ,  C08F10/06 ,  C08F110/06 ,  C08F210/06 ,  C08K3/00 ,  C08L23/10

    Abstract: A polypropylene resin composition comprising 5-25% by weight of a higher molecular weight polypropylene (A) having an intrinsic viscosity Ä eta Ü, determined in decalin at 135 DEG C, of from 6 to 11 dl/g and 95 - 75% by weight of a lower molecular weight polypropylene (B) having an intrinsic viscosity Ä eta Ü, determined in decalin at 135 DEG C of from 0.6 to 1.6 dl/g, wherein the said resin composition has the following characteristic features (1) and (2), namely, (1) an isotactic pentad fraction (mmmm-fraction), determined by C-NMR, of at least 96.5% and (2) a molecular weight distribution expressed by Mw/Mn (weight-average molecular weight/number-average molecular weight), determined by gel permeation chromatography (GPC), of at least 8.

    4.
    发明专利
    未知

    公开(公告)号：DE60016642D1

    公开(公告)日：2005-01-20

    申请号：DE60016642

    申请日：2000-02-02

    Applicant: MITSUI CHEMICALS INC

    Inventor： IMAI TADASHI ,  HASHIMOTO MIKIO ,  HARIMA SHIGERU

    IPC: C08L23/12 ,  C08F4/658 ,  C08F10/06 ,  C08F110/06 ,  C08F210/06 ,  C08K3/00 ,  C08L23/10

    Abstract: A polypropylene resin composition comprising 5-25% by weight of a higher molecular weight polypropylene (A) having an intrinsic viscosity Ä eta Ü, determined in decalin at 135 DEG C, of from 6 to 11 dl/g and 95 - 75% by weight of a lower molecular weight polypropylene (B) having an intrinsic viscosity Ä eta Ü, determined in decalin at 135 DEG C of from 0.6 to 1.6 dl/g, wherein the said resin composition has the following characteristic features (1) and (2), namely, (1) an isotactic pentad fraction (mmmm-fraction), determined by C-NMR, of at least 96.5% and (2) a molecular weight distribution expressed by Mw/Mn (weight-average molecular weight/number-average molecular weight), determined by gel permeation chromatography (GPC), of at least 8.

    5.
    发明专利
    未知

    公开(公告)号：DE60314895D1

    公开(公告)日：2007-08-23

    申请号：DE60314895

    申请日：2003-08-26

    Applicant: MITSUI CHEMICALS INC

    Inventor： IMAI TADASHI

    IPC: C08L21/00 ,  C08K5/14 ,  C08L23/06 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  C08L91/00

    Abstract: A thermoplastic elastomer excellent in rubber elasticity and extrudability and a molded object thereof. The thermoplastic elastomer comprises a partly or wholly crosslinked rubber (A), an isotactic polypropylene (B) having an isotactic pentad content of 0.8 or higher, a syndiotactic polypropylene (C) having a syndiotactic pentad content of 0.6 or higher, and a softener (D), the content of the syndiotactic of the syndiotactic polypropylene (C) being in the range of 0.5 to 10 wt.% based on the sum of the crosslinked rubber (A), isotactic polypropylene (B), syndiotactic polypropylene (C), and softener (D), the thermoplastic elastomer having a melt flow rate of 0.01 to 1000 g/10min as measured in accordance with ASTMD 1238 at 230 DEG C under a load of 10 kg. The molded object is obtained by extrusion-molding the elastomer.

    6.
    发明专利
    未知

    公开(公告)号：DE60201872D1

    公开(公告)日：2004-12-16

    申请号：DE60201872

    申请日：2002-08-30

    Applicant: MITSUI CHEMICALS INC

    Inventor： IMAI TADASHI ,  UCHIYAMA AKIRA

    IPC: C08L23/04 ,  B29C65/70 ,  C08L23/06 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16

    Abstract: The olefin thermoplastic elastomer of the invention has an islands-sea structure, in which the average particle diameter of the islands phases is not more than 2 mu m, and has a gel fraction ranging from 0.5 to 15% by weight and a quantity of heat of melt at a temperature of 125 DEG C or below, as measured in a different scanning calorimeter (DSC), of 40% or more of the total quantity of heat of melt. The olefin thermoplastic elastomer can be obtained by melt blending in the presence of a crosslinking agent of a specific amount a blend that contains specific amounts of: a high density polyethylene having a density of 0.940g/cm or more, or a crystalline ethylene polymer having a crystallinity determined by a DSC method of 10% or more and a density of less than 0.940g/cm , an ethylene/ alpha -olefin(/non-conjugated polyene) copolymer rubber comprising ethylene, an alpha -olefin of 3 to 20 carbon atoms and optionally a non-conjugated polyene, and a polypropylene. The molded product of the invention is constructed by bonding, preferably hot melt bonding the above thermoplastic elastomer to a molded product of a vulcanized rubber. According to the present invention, there can be provided a thermoplastic elastomer capable of forming a molded product that can be bonded to a vulcanized rubber (substrate) with sufficient bonding strength without an adhesive layer to allow for destruction by body rupture, a thermoplastic elastomer excellent in moldability and economic efficiency that can form a light molded product having a hardness and a rubber elasticity sufficient for a thermoplastic elastomer, a process for production thereof, and a molded product constructed by melt bonding either of the elastomers to a vulcanized rubber.

    7.
    发明专利
    未知

    公开(公告)号：DE60314895T2

    公开(公告)日：2008-03-13

    申请号：DE60314895

    申请日：2003-08-26

    Applicant: MITSUI CHEMICALS INC

    Inventor： IMAI TADASHI

    IPC: C08L21/00 ,  C08K5/14 ,  C08L23/06 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  C08L91/00

    Abstract: A thermoplastic elastomer excellent in rubber elasticity and extrudability and a molded object thereof. The thermoplastic elastomer comprises a partly or wholly crosslinked rubber (A), an isotactic polypropylene (B) having an isotactic pentad content of 0.8 or higher, a syndiotactic polypropylene (C) having a syndiotactic pentad content of 0.6 or higher, and a softener (D), the content of the syndiotactic of the syndiotactic polypropylene (C) being in the range of 0.5 to 10 wt.% based on the sum of the crosslinked rubber (A), isotactic polypropylene (B), syndiotactic polypropylene (C), and softener (D), the thermoplastic elastomer having a melt flow rate of 0.01 to 1000 g/10min as measured in accordance with ASTMD 1238 at 230 DEG C under a load of 10 kg. The molded object is obtained by extrusion-molding the elastomer.

    9.
    发明专利
    未知

    公开(公告)号：DE60201872T2

    公开(公告)日：2005-10-20

    申请号：DE60201872

    申请日：2002-08-30

    Applicant: MITSUI CHEMICALS INC

    Inventor： IMAI TADASHI ,  UCHIYAMA AKIRA

    IPC: C08L23/04 ,  B29C65/70 ,  C08L23/06 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16

    Abstract: The olefin thermoplastic elastomer of the invention has an islands-sea structure, in which the average particle diameter of the islands phases is not more than 2 mu m, and has a gel fraction ranging from 0.5 to 15% by weight and a quantity of heat of melt at a temperature of 125 DEG C or below, as measured in a different scanning calorimeter (DSC), of 40% or more of the total quantity of heat of melt. The olefin thermoplastic elastomer can be obtained by melt blending in the presence of a crosslinking agent of a specific amount a blend that contains specific amounts of: a high density polyethylene having a density of 0.940g/cm or more, or a crystalline ethylene polymer having a crystallinity determined by a DSC method of 10% or more and a density of less than 0.940g/cm , an ethylene/ alpha -olefin(/non-conjugated polyene) copolymer rubber comprising ethylene, an alpha -olefin of 3 to 20 carbon atoms and optionally a non-conjugated polyene, and a polypropylene. The molded product of the invention is constructed by bonding, preferably hot melt bonding the above thermoplastic elastomer to a molded product of a vulcanized rubber. According to the present invention, there can be provided a thermoplastic elastomer capable of forming a molded product that can be bonded to a vulcanized rubber (substrate) with sufficient bonding strength without an adhesive layer to allow for destruction by body rupture, a thermoplastic elastomer excellent in moldability and economic efficiency that can form a light molded product having a hardness and a rubber elasticity sufficient for a thermoplastic elastomer, a process for production thereof, and a molded product constructed by melt bonding either of the elastomers to a vulcanized rubber.

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