CYLINDRICAL MOULDINGS BASED ON CELLULAR POLYURETHA

专利名称：CYLINDRICAL MOULDINGS BASED ON

CELLULAR POLYURETHANE ELASTOMERS

发明人：MARTEN, ELKE,HEIDEMANN,

ANDREAS,SCHUETTE, MARKUS,STRAUSS,MICHAEL,BOLLMANN, HEINRICH,HANSEN,RALF

申请号：EP06743196.5申请日：20060221公开号：EP1856175B1公开日：20081203

摘要：Cylindrical moulding based on cellular polyurethane elastomers with a densityto DIN EN ISO 845 of between 300 and 900 kg/m3, a tensile strength to DIN EN ISO 1798of > 2.0 N/mm2, a breaking extension to DIN EN ISO 1798 of > 200 % and a tearpropagation resistance to DIN ISO 34-1 B (b) of ≥ 8 N/mm, characterized in that thecellular polyurethane elastomer is based on the reaction of (i) a prepolymer withisocyanate groups which is based on (a) methylenediphenyldiisocyanate (MDI) and (b1 )polyetherdiol having a molecular weight of between 1500 g/mol and 3000 g/mol andbased on propylene oxide and/or ethylene oxide, with (ii) a crosslinker componentcomprising (b2) polyether alcohol having a nominal functionality with respect to

isocyanates of 2 to 3 and a molecular weight of between 1500 g/mol and 6000 g/mol andbased on propylene oxide and/or ethylene oxide, (c2) diol having a molecular weight ofbetween 62 g/mol and 499 g/mol, (d) water and (e) catalysts, the polyols (b) contained inthe cylindrical moulding and comprising (b1) and (b2) possessing an average polyol molar

mass of less than 3900 g/mol, the average polyol molar mass M(polyol) being calculatedin accordance with the following formula (I) with the following definitions: M(polyol) :average polyol molar mass in g/mol Mb11 (or Mb1n): molar mass of polyol b11 (orpolyol bi n) in the prepolymer (i) in g/mol Mb11 (or mb1n): mass fraction of polyol b11(or polyol b1n) in the prepolymer (i) in g/g Wp: mass fraction of the prepolymer (i) in thecylindrical moulding in g/g Mb2i (or Mb2n): molar mass of polyol b21 (or polyol b2n) inthe crosslinker component (ii) in g/mol mb2i (or mb2n): mass fraction of polyol b21 (orpolyol b2n) in the crosslinker component (ii) in g/g Wc: mass fraction of the crosslinkercomponent (ii) in the cylindrical moulding in g/g.

申请人：BASF SE,BASF SE,BASF SE

地址：DE

国籍：DE

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