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

Inventor： FALKE PETER ,  ROTERMUND INGE ,  SCHMUTZER KLAUS ,  SCHMALER KIRSTEN

IPC: C08G18/48 ,  C08G18/72 ,  C08L75/08

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.

公开(公告)号：DE19811472A1

公开(公告)日：1999-09-23

申请号：DE19811472

申请日：1998-03-17

Applicant: BASF AG

Inventor： FALKE PETER ,  HENDREICH REGINA ,  SCHUSTER MARITA ,  OSWALD OTTO ,  SCHMUTZER KLAUS

IPC: C08G18/40 ,  C08G18/66 ,  D06N3/14 ,  C08G18/64 ,  C08G18/38 ,  C08G18/48 ,  C08G18/32 ,  C08L75/00 ,  C08J9/14 ,  B29C44/12

Abstract: The polyol component in a low-penetration polyurethane (PUR) reaction mixture used for foam-backing sheet materials comprises a polyol containing dispersed ureas obtained by reacting NH-functional compounds with isocyanates. A process for foam-backing sheet materials with PUR showing a reduced depth of penetration comprises coating porous sheet material with a reaction mixture containing (a) polyisocyanate(s), (b) compound(s) with at least 2 reactive hydrogen atoms, optionally (c) blowing agents, (d) catalysts and (e) other additives etc. and allowing the mixture to react on the substrate. Component (b) is a polyol containing dispersed ureas obtained by reacting NH-functional compounds with isocyanates. An Independent claim is also included for a PUR foam-backing system with a reduced depth of penetration, containing components (a)-(e) as above.