21.
    发明专利
    未知

    公开(公告)号:DE19924802B4

    公开(公告)日:2008-02-28

    申请号:DE19924802

    申请日:1999-05-29

    Applicant: BASF AG

    Abstract: Sound-damping and energy-absorbing flexible PUR foams are produced by reacting organic and/or modified organic polyisocyanates (a) with a polyetherol mixture (b) and, if desired, further compounds (c) bearing hydrogen atoms which are reactive toward isocyanates, in the presence of water and/or other blowing agents (d), catalysts (e) and, if desired, further auxiliaries and additives (f).

    22.
    发明专利
    未知

    公开(公告)号:DE19519679B4

    公开(公告)日:2006-04-06

    申请号:DE19519679

    申请日:1995-05-30

    Applicant: BASF AG

    Abstract: Prepn. of rigid polyurethane foam with reduced after-expansion and decreased mould release times comprises reacting (a) organic and/or modified organic polyisocyanates with (b) high molecular cpd(s). contg. at least 2 reactive H atoms and opt. (c) low molecular chain extender and/or crosslinker in the presence of (d) blowing agent, (e) catalyst, (f) alkali metal salt (I) and opt. (g) other ancillaries and/or additives. (I) is dialkali H phosphate (IA) with an alkali content of 50-2500 ppm w.r.t. the amt. of components (b)-(g). Also claimed is the obtd. foam.

    Production of sound- and energy-absorbing flexible polyurethane foam, involves reacting polyisocyanate with a special polyol mixture containing at least three polyfunctional polyether-ol components

    公开(公告)号:DE19924802A1

    公开(公告)日:2000-11-30

    申请号:DE19924802

    申请日:1999-05-29

    Applicant: BASF AG

    Abstract: A polyether-ol (PEOL) mixture for the production of flexible polyurethane foam comprises (b1) 2- to 8-functional PEOL with more than 50% prim. OH groups based on propylene and/or butylene oxide (PO/BO) and ethylene oxide (EO), (b2) 2- to 6-functional PEOL based on PO and/or BO and (b3) other PEOL with more than 25% prim. OH groups, based on EO and PO. A process for the production of sound-damping and energy-absorbing flexible polyurethane (PUR) foam by reacting: (a) optionally modified polyisocyanates; with (b) a polyether-ol mixture; and optionally (c) other compounds with isocyanate-reactive hydrogen atoms; in presence of (d) water and/or other blowing agents; (e) catalysts; and optionally (f) other additives, etc.. Component (b) comprises (b1) di- to octa-functional polyether-ol(s) based on a mixture of PO and/or BO and more than 40 wt.% EO, with an OH number of 20-1000 mg KOH/g and a primary OH group content of more than 50%, with the proviso that (b1) contains at least one at least difunctional polyether-ol (b1.1) with an OH number of 20-100, (b2) di- to hexa-functional polyether-ol(s) with an OH number of more than 30, based on PO and/or BO, and (b3) other polyether-ol(s) based on EO and PO with a prim. OH group content of more than 25%, with the proviso that the content of (b1) in (b) is more than 30 wt%. An Independent claim is also included for PUR foam obtained by this process.

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