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    Production of microcellular polyurethane elastomers with good static and dynamic mechanical properties
    56.
    发明专利
    Production of microcellular polyurethane elastomers with good static and dynamic mechanical properties 未知

    公开(公告)号：DE19628146A1

    公开(公告)日：1998-01-15

    申请号：DE19628146

    申请日：1996-07-12

    Applicant: BASF AG

    Inventor： GENZ MANFRED DR ,  MERGER ROLAND DR ,  BOLLMANN HEINZ ,  THAERIGEN RAINA

    IPC: C08G18/77 ,  C08J9/00 ,  C08G18/42 ,  C08G18/44 ,  C08G18/48 ,  C08G18/66 ,  C08G18/32 ,  C08G18/10 ,  C08J9/06

    Abstract: Production of microcellular polyurethane elastomers is claimed by reacting (A) high mol. polyhydroxy compounds and optionally (B) low. mol. chain extenders and/or crosslinkers with (C) 3,3'-dimethoxy-4,4'- diisocyanato-diphenyl in presence or absence of (D) catalysts, foaming agents etc.. Preferably the polyhydroxy component (A) is of functionality 2-3 and mol. wt. 500-6,000 and is especially a difunctional polyester polyol, OH-containing polycarbonate or polyoxybutylene glycol of mol. wt. 800-3,500 while the chain extender is an alkane diol, dialkylene glycol or polyoxyalkylene glycol of mol. wt. up to 800 and the crosslinker is also of mol. wt. up to 800 and is a tri-or tetra-hydric alcohol or polyoxyalkylene polyol of functionality 3-4. Preparation of the elastomer is by: (1) first preparing a prepolymer of NCO content 2-20 wt.% by reacting (C) with (A) and optionally (B) and then reacting this prepolymer with water and optionally also (B); or (2) first reacting (C) with part of (A) and optionally also (B) and then reacting the prepolymer obtained with a mixture of water, the remainder of (A) and optionally also (B).

    Microcellular urea-containing polyurethane elastomer
    57.
    发明专利
    Microcellular urea-containing polyurethane elastomer 未知

    公开(公告)号：AU1372597A

    公开(公告)日：1997-07-17

    申请号：AU1372597

    申请日：1996-12-16

    Applicant: BASF AG

    Inventor： KRECH RUDIGER ,  ROTERMUND UDO ,  BOLLMANN HEINZ ,  HEMPEL RENATE ,  SCHOLZ WOLFGANG ,  GENZ MANFRED

    IPC: C08J9/36 ,  C08G18/08 ,  C08G18/40 ,  C08G18/76 ,  C08G101/00

    Abstract: PCT No. PCT/EP96/05639 Sec. 371 Date Nov. 18, 1998 Sec. 102(e) Date Nov. 18, 1998 PCT Filed Dec. 16, 1996 PCT Pub. No. WO97/23534 PCT Pub. Date Jul. 3, 1997A microcellular PU elastomer having improved dynamic-mechanical properties and based on an isocyanate component consisting essentially of 4,4'-MDI and also further customary constituents has, after heating at from 100 to 120 DEG C. for from 8 to 24 hours, a melting range of from 130 DEG C. as the minimum lower limit to 230 DEG C. as a minimum upper limit, measured by differential scanning calorimetry (DSC) at a heating rate of 20 DEG C./min, and a urea content of from 14 to 18% by weight. A process is also provided for preparing such a microcellular PU elastomer having improved dynamic mechanical properties. The microcellular PU elastomers can be used for producing damping elements.

    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
    60.
    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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