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    Preparing polyurethane foam, useful as a cleaning sponge for e.g. cleaning tubes, comprises mixing and reacting polyisocyanate, blowing agent (water) and optionally chain extenders, catalyst, and other auxiliaries and/or additives
    2.
    发明专利
    Preparing polyurethane foam, useful as a cleaning sponge for e.g. cleaning tubes, comprises mixing and reacting polyisocyanate, blowing agent (water) and optionally chain extenders, catalyst, and other auxiliaries and/or additives 未知

    公开(公告)号：DE102009028631A1

    公开(公告)日：2010-02-25

    申请号：DE102009028631

    申请日：2009-08-19

    Applicant: BASF SE

    Inventor： MOHMEYER NILS ,  FRITZ RALF ,  HABICHT ANNIKA ,  TEPE DANIELA ,  PRISSOK FRANK ,  HARMS MICHAEL

    IPC: C08L75/08 ,  C08J9/08

    Abstract: Preparation of a polyurethane foam (I) with a density of 70-300 g/dm 3>and 1-20 cells/cm, comprises mixing and reacting polyisocyanate obtained by reacting diisocyanates e.g. methanediisocyanate, with non-polar polyetherols obtained by alkoxylation of 2 to 4-hydric alcohols with propylene oxide and/or butylene oxide, and/or polytetrahydrofuran, and polar polyetherols obtained by alkoxylation of 2- to 4-hydric alcohols with ethylene oxide and propylene oxide, a blowing agent comprising water, and optionally chain extenders, a catalyst, and other auxiliaries and/or additives to form (I). Preparation of a polyurethane foam (I) with a density of 70-300 g/dm 3>and 1-20 cells/cm, comprises mixing and reacting polyisocyanate obtained by reacting diisocyanates comprising methanediisocyanate and/or naphthalene diisocyanate, with non-polar polyetherols obtained by alkoxylation of 2 to 4-hydric alcohols with propylene oxide and/or butylene oxide and/or polytetrahydrofuran, and polar polyetherols obtained by alkoxylation of 2- to 4-hydric alcohols with ethylene oxide and propylene oxide, where the proportion of oxyethylene units, based on all oxyalkylene units, is at least 15 wt.%, and the isocyanate content of the polyisocyanate is 3-14%, a blowing agent comprising water, and optionally chain extenders, a catalyst, and other auxiliaries and/or additives to form (I) An independent claim is included for the polyurethane foam made by the method.

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