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    Preparation of cylindrical molded bodies, useful in automobiles e.g. springs, comprises reaction of prepolymers based on methylenediphenyldiisocyanate with cross linking components based on polyetheralcohol, diols, water and catalysts
    1.
    发明专利
    Preparation of cylindrical molded bodies, useful in automobiles e.g. springs, comprises reaction of prepolymers based on methylenediphenyldiisocyanate with cross linking components based on polyetheralcohol, diols, water and catalysts 未知

    公开(公告)号：DE102005008263A1

    公开(公告)日：2006-08-24

    申请号：DE102005008263

    申请日：2005-02-22

    Applicant: BASF AG

    Inventor： HANSEN RALF ,  JACKISCH PETER ,  MARTEN ELKE

    IPC: C08G18/76 ,  B29C44/02 ,  C08G18/48 ,  C08J9/228 ,  F16F1/36

    Abstract: Preparation of cylindrical molded bodies (I) based on cellular polyurethane elastomers with determined density, tensile strength, elongation and a tear resistance, comprises reaction of prepolymers (i) with cross linking components (ii) in a molded form, where (i) are isocyanate groups based on methylenediphenyldiisocyanate and polyetherdiol; and (ii) contains polyetheralcohol with a nominal functionality of 2-3; diol with a molecular weight of 62-499 g/mol; water; and catalysts. Preparation of cylindrical molded bodies (I) based on cellular polyurethane elastomers with a density of 350-900 kg/m 3> according to DIN EN ISO 1798, a tensile strength of >= 2 N/mm 2> according to DIN EN ISO 1798, elongation of >= 200% according to DIN EN ISO 1798 and a tear resistance of >= 8 N/mm according to DIN ISO 34-1 B, comprises reaction of prepolymers (i) with cross linking components (ii) in a molded form, where (i) are isocyanate groups based on methylenediphenyldiisocyanate and polyetherdiol with a molecular weight of 1500-3000 g/mol based on propylene oxide and/or ethyleneoxide; and (ii) contains polyetheralcohol with a nominal functionality of 2-3 in relation to isocyanates and a molecular weight of 1500-6000 g/mol based on propylene oxide and/or ethyleneoxide; diol with a molecular weight of 62-499 g/mol; water; and catalysts, where (i) and (ii) are filled in a molded form by means of a high pressure machine, which exhibits a mixing head, into which (i) and (ii) are mixed and obtained product amounts to 15-60 g/s.

    Cylindrical molded bodies, useful in automobile parts e.g. auxiliary springs, buffer, short arm-bearing, comprises cellular polyurethane elastomers with determined density, tensile strength, breach extension and tear resistance
    2.
    发明专利
    Cylindrical molded bodies, useful in automobile parts e.g. auxiliary springs, buffer, short arm-bearing, comprises cellular polyurethane elastomers with determined density, tensile strength, breach extension and tear resistance 未知

    公开(公告)号：DE102005008242A1

    公开(公告)日：2006-08-24

    申请号：DE102005008242

    申请日：2005-02-22

    Applicant: BASF AG

    Inventor： MARTEN ELKE ,  HEIDEMANN ANDREAS ,  SCHUETTE MARKUS ,  STRAUS MICHAEL ,  BOLLMANN HEINZ ,  HANSEN RALF

    IPC: C08G18/10 ,  B29C44/02 ,  C08G18/48 ,  C08J9/22 ,  F16F9/32

    Abstract: Cylindrical molded bodies (I) comprises cellular polyurethane elastomers with a density of 300-900 kg/m 3>, a tensile strength of >= 2 N/mm 2>, a breach extension of >= 200% and a tear resistance of >= 8 N/mm, where the cellular polyurethane elastomers are based on reaction of: (i) isocyanate groups of prepolymers based on methylenediphenyldiisocyanate and polyetherdiol; with (ii) cross linking components containing polyetheralcohol; diol with a molecular weight of 62-499 g/mol; water; and catalysts. Cylindrical molded bodies (I) comprises cellular polyurethane elastomers with a density of 300-900 kg/m 3>according to DIN EN ISO 845, a tensile strength of >= 2 N/mm 2>according to DIN EN ISO 1798, a breach extension of >= 200% according to DIN EN ISO 1798 and a tear resistance of >= 8 N/mm according to DIN ISO 34-1 B, where the cellular polyurethane elastomers are based on reaction of: (i) prepolymers exhibiting isocyanate groups based on methylenediphenyldiisocyanate and polyetherdiol with a molecular weight of 1500-3000 g/mol based on propylene oxide and/or ethyleneoxide; with (ii) cross linking components containing polyetheralcohol with a nominal functionality of 2-3 in relation to isocyanates and a molecular weight of 1500-6000 g/mol based on propylene oxide and/or ethyleneoxide; diol with a molecular weight of 62-499 g/mol; water; and catalysts, where the polyol exhibits an average molecular mass of smaller than 3900 g/mol, where the average polyol molecular mass (M(polyol)) is calculated by (M b11xm b11+...+M b1nxm b1n)xW p+(M b21xm b21+...+M b2nxm b2n)xW v/(m b11+...+m b1n)xW p+(m b21+...+m b2n)xW v, where M (polyol) is average polyol molecular mass in g/mol; M b11(and/or M b1n) is molecular mass of polyol b11 (and/or polyol b1n) in (i) in g/mol; m b11(and/or m b1n) is mass proportion of polyol b11 (and/or polyol b1n) in (i) in g/g; W pis mass proportion of (i) in the cylindrical molded article in g/g; M b21(and/or M b2n) is molecular mass of polyol b21 and/or (polyol b2n) in (ii) in g/mol; m b21(and/or m b2n) is mass proportion of polyol b21 (and/or polyol b2n) in (ii) in g/g; and W vis mass proportion of (ii) in the cylindrical molded article in g/g. Independent claims are included for: (1) automobile chassis containing shock absorbers, a hollow cylindrical molded bodies, which is placed on its piston rod; and (2) the preparation of (I).

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