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    1.
    发明专利
    未知

    公开(公告)号：DE68904255D1

    公开(公告)日：1993-02-18

    申请号：DE68904255

    申请日：1989-06-23

    Applicant: BRIDGESTONE CORP

    Inventor： ISHIWAKA TAKUMI ,  HASEGAWA HAJIME ,  OHASHI TAKASHI

    IPC: C08J9/04 ,  C08G18/00 ,  C08G18/32 ,  C08G18/40 ,  C08G18/65 ,  C08J9/00 ,  C08K5/34 ,  C08K5/3492 ,  C08L75/00 ,  C08L75/04

    Abstract: A process for producing a flexible polyurethane foam by reacting a polyhydroxy compound and a polyisocyanate compound in the presence of a blowing agent. The polyhydroxy compound is one in which an aldehyde condensation polymer has been formed by polycondensation and dispersed such that it accounts for, preferably, from 5 to 30 wt% of the total amount of the polyhydroxy compound, and adding as a flame retardant a melamine powder preferably in an amount of from 5 to 100 parts by weight per 100 parts by weight of polyhydroxy compound. The resulting foams combine good flame retardance with high hardness and compressive strength.

    4.
    发明专利
    未知

    公开(公告)号：DE69410693D1

    公开(公告)日：1998-07-09

    申请号：DE69410693

    申请日：1994-03-03

    Applicant: BRIDGESTONE CORP

    Inventor： HASEGAWA HAJIME ,  USAMI KAZUYOSHI

    IPC: C08G18/62 ,  C08G18/69 ,  C08J9/06 ,  C08J9/30 ,  C09K3/10

    Abstract: A sealing material is prepared by furnishing a liquid composition comprising a polydiene or polyolefin polyol, a polyisocyanate compound, a foam stabilizer, and a blowing agent, uniformly dispersing an inert gas in the liquid composition by mechanical agitation to form a bubbled composition, shaping the bubbled composition into a sheet shape, and heat curing the bubbled shape at a temperature below the decomposition temperature of the blowing agent. The sealing material is lightweight and has a high blowing magnification. On use, the sealing material is disposed in a cavity of an automotive pillar or similar member and heated for foaming to fill the cavity with the foamed product.

    5.
    发明专利
    未知

    公开(公告)号：DE68904255T2

    公开(公告)日：1993-06-03

    申请号：DE68904255

    申请日：1989-06-23

    Applicant: BRIDGESTONE CORP

    Inventor： ISHIWAKA TAKUMI ,  HASEGAWA HAJIME ,  OHASHI TAKASHI

    IPC: C08J9/04 ,  C08G18/00 ,  C08G18/32 ,  C08G18/40 ,  C08G18/65 ,  C08J9/00 ,  C08K5/34 ,  C08K5/3492 ,  C08L75/00 ,  C08L75/04

    Abstract: A process for producing a flexible polyurethane foam by reacting a polyhydroxy compound and a polyisocyanate compound in the presence of a blowing agent. The polyhydroxy compound is one in which an aldehyde condensation polymer has been formed by polycondensation and dispersed such that it accounts for, preferably, from 5 to 30 wt% of the total amount of the polyhydroxy compound, and adding as a flame retardant a melamine powder preferably in an amount of from 5 to 100 parts by weight per 100 parts by weight of polyhydroxy compound. The resulting foams combine good flame retardance with high hardness and compressive strength.

    7.
    发明专利
    未知

    公开(公告)号：DE69410693T2

    公开(公告)日：1999-01-07

    申请号：DE69410693

    申请日：1994-03-03

    Applicant: BRIDGESTONE CORP

    Inventor： HASEGAWA HAJIME ,  USAMI KAZUYOSHI

    IPC: C08G18/62 ,  C08G18/69 ,  C08J9/06 ,  C08J9/30 ,  C09K3/10

    Abstract: A sealing material is prepared by furnishing a liquid composition comprising a polydiene or polyolefin polyol, a polyisocyanate compound, a foam stabilizer, and a blowing agent, uniformly dispersing an inert gas in the liquid composition by mechanical agitation to form a bubbled composition, shaping the bubbled composition into a sheet shape, and heat curing the bubbled shape at a temperature below the decomposition temperature of the blowing agent. The sealing material is lightweight and has a high blowing magnification. On use, the sealing material is disposed in a cavity of an automotive pillar or similar member and heated for foaming to fill the cavity with the foamed product.

    PRODUCTION OF FLEXIBLE POLYURETHANE FOAM
    9.
    发明专利
    PRODUCTION OF FLEXIBLE POLYURETHANE FOAM 失效

    公开(公告)号：JPH10176073A

    公开(公告)日：1998-06-30

    申请号：JP19652697

    申请日：1997-07-07

    Applicant: BRIDGESTONE CORP

    Inventor： KINOSHITA HIDEYA ,  YAMAGUCHI NORIYUKI ,  HASEGAWA HAJIME

    IPC: B08B11/04 ,  C08G18/62 ,  C08G101/00 ,  C08J9/02

    Abstract: PROBLEM TO BE SOLVED: To produce a flexible polyurethane foam having high water absorptivity at a low cost. SOLUTION: A polyol containing a metallic salt of an organic acid having hydrophilicity and/or its polymer is used in 20-100wt.% of the polyol and the resultant polyurethane foam is compressed to 5-80% of the original thickness when expanding a composition consisting essentially of the polyol, an isocyanate and water, and producing a flexible polyurethane foam.

    PAPER FEEDING MEMBER AND PAPER FEEDER
    10.
    发明专利
    PAPER FEEDING MEMBER AND PAPER FEEDER 失效

    公开(公告)号：JPH1072135A

    公开(公告)日：1998-03-17

    申请号：JP23109896

    申请日：1996-08-30

    Applicant: BRIDGESTONE CORP

    Inventor： ANDO YUKIO ,  HASEGAWA HAJIME

    IPC: B65H5/06 ,  B65H27/00

    Abstract: PROBLEM TO BE SOLVED: To attain low hardness, and reduce contamination to paper sheets by setting tackiness in a surface of a paper feeding member using thermoplastic elastomer to a specific value. SOLUTION: A paper feeding member is used for at least one or more of a pickup roller 2, a feed roller 3 and a reverse roller 4, and an elastic layer 5 is formed of thermoplastic elastomer. When tackiness in a surface of the thermoplastic elastomer is set not more than 30g, preferably, not more than 20g, contamination to paper sheets 1 can be reduced while maintaining a constant friction coefficient. The thermoplastic elastomer is composed mainly of a high polymer organic material and a softening agent, and for example, a thermoplastic high polymer material having number average molecular weight not less than 20,000 is used as the high polymer organic material, and a low molecular weight material having number average molecular weight less than 20,000 is used as the softening agent. A blending amount of the softening agent is adjusted, and JIS-A hardness is set not more than 60 deg.. Therefore, low hardness is attained, and contamination to the paper sheets 1 such as paper, a film or photographic printing paper can be reduced.

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