PRODUCTION OF THERMOPLASTIC POLYURETHANE

    公开(公告)号:JPH11322887A

    公开(公告)日:1999-11-26

    申请号:JP10806299

    申请日:1999-04-15

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To obtain a method for producing a polyisocyanate addition polymerized product having increased resistance to heat distortion, especially a thermoplastic polyisocyanate addition polymerized product (thermoplastic polyurethane, also called as TPU). SOLUTION: This thermoplastic polyurethane is obtained by reacting (a) isocyanate with (b) a compound reactive to the isocyanate and having a molecular weight of 451-8,000 in the presence of (c) a chain extender and further (d) a crosslinking agent and (e) a catalyst and/or (f) a usual auxiliary and/or an additive, as necessary. As the extender, 1,3-and/or 1,2-propane diol is used. Furthermore, the reaction is performed under the condition of >=104 isocyanate index [(a real amount of the isocyanate/a total amount of diisocyanate group theoretically required to completely the whole OH group)×100].

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