公开(公告)号：JPH1095825A

公开(公告)日：1998-04-14

申请号：JP22324797

申请日：1997-08-20

Applicant: BASF AG

Inventor： JESCHKE TORSTEN ,  KRIESMANN ARNE ,  BRUNS UTE ,  SCHOLZ WOLFGANG ,  LUEDERWALD MICHAEL-CHRISTIAN ,  PEUKER HARTMUT

IPC: C08J9/12 ,  C08G18/06 ,  C08G18/10 ,  C08G18/42 ,  C08G18/48 ,  C08G18/64 ,  C08G18/65 ,  C08G18/76 ,  C08G101/00 ,  C08J9/33 ,  C08L75/04

Abstract: PROBLEM TO BE SOLVED: To provide a method for recycling polyurethane wherein polyurethane to be recycled for the production thereof can be introduced again into the production process without the necessity for resigning to the loss of quality. SOLUTION: A ground polyurethane in an amount of 0.1-40wt.% is reacted with a substance having two or more isocyanate groups (a) and active hydrogen atoms (b) and reactive with isocyanates and, in some cases, a polyaddition mixture (c) containing a chain extender and/or a crosslinking agent, a catalyst, a foaming agent and commonly used additives to produce a prepolymer in the first reaction step, and this prepolymer is reacted with water and, in some cases, the polyaddition mixture (c) to form polyurethane in the second reaction step.

公开(公告)号：CA2212117A1

公开(公告)日：1998-02-22

申请号：CA2212117

申请日：1997-08-18

Applicant: BASF AG

Inventor： SCHOLZ WOLFGANG ,  PEUKER HARTMUT ,  BRUNS UTE ,  JESCHKE TORSTEN ,  LUEDERWALD MICHAEL-CHRISTIAN ,  KRIESMANN ARNE

IPC: C08J9/12 ,  C08G18/06 ,  C08G18/10 ,  C08G18/42 ,  C08G18/48 ,  C08G18/64 ,  C08G18/65 ,  C08G18/76 ,  C08G101/00 ,  C08J9/33 ,  C08L75/04 ,  C08G18/08 ,  C08J11/04

Abstract: Polyurethanes are recycled by comminution to particle sizes of from 0.01 to 2 mm and addition to the polyaddition mixture for preparing polyurethanes from (a) polyisocyanates, (b) substances reactive toward isocyanates and having active hydrogens, and, if desired, (c) chain extenders and/or crosslinkers, catalysts, blowing agents and customary additives in an amount of from 0.1 to 40% by weight, based on the polyaddition mixture.

公开(公告)号：DE59711696D1

公开(公告)日：2004-07-15

申请号：DE59711696

申请日：1997-08-11

Applicant: BASF AG

Inventor： JESCHKE TORSTEN ,  KRIESMANN ARNE ,  BRUNS UTE ,  SCHOLZ WOLFGANG ,  LUEDERWALD MICHAEL-CHRISTIAN ,  PEUKER HARTMUT

IPC: C08G18/06 ,  C08G18/10 ,  C08G18/42 ,  C08G18/48 ,  C08J9/12 ,  C08G18/64 ,  C08G18/65 ,  C08G18/76 ,  C08G101/00 ,  C08J9/33 ,  C08L75/04

Abstract: A process for recycling polyurethanes (PUR), in which the PUR (I) is finely chopped and added in amounts of 0.1-40 wt.% to a reaction mixture for the production of PUR by the polyaddition reaction of (a) polyisocyanates, (b) isocyanate-reactive substances with active hydrogen atoms and optionally (c) chain extenders and/or crosslinkers, catalysts, blowing agents and other normal additives.

公开(公告)号：DE19633891A1

公开(公告)日：1998-02-26

申请号：DE19633891

申请日：1996-08-22

Applicant: BASF AG

Inventor： JESCHKE TORSTEN ,  KRIESMANN ARNE ,  BRUNS UTE ,  SCHOLZ WOLFGANG ,  LUEDERWALD MICHAEL-CHRISTIAN ,  PEUKER HARTMUT

IPC: C08G18/06 ,  C08G18/10 ,  C08J9/12 ,  C08G18/42 ,  C08G18/48 ,  C08G18/64 ,  C08G18/65 ,  C08G18/76 ,  C08G101/00 ,  C08J9/33 ,  C08L75/04 ,  C08G18/00 ,  C08J11/04

Abstract: A process for recycling polyurethanes (PUR), in which the PUR (I) is finely chopped and added in amounts of 0.1-40 wt.% to a reaction mixture for the production of PUR by the polyaddition reaction of (a) polyisocyanates, (b) isocyanate-reactive substances with active hydrogen atoms and optionally (c) chain extenders and/or crosslinkers, catalysts, blowing agents and other normal additives.

公开(公告)号：AT268789T

公开(公告)日：2004-06-15

申请号：AT97113931

申请日：1997-08-11

Applicant: BASF AG

Inventor： JESCHKE TORSTEN ,  KRIESMANN ARNE ,  BRUNS UTE ,  SCHOLZ WOLFGANG ,  LUEDERWALD MICHAEL-CHRISTIAN ,  PEUKER HARTMUT

IPC: C08J9/12 ,  C08G18/06 ,  C08G18/10 ,  C08G18/42 ,  C08G18/48 ,  C08G18/64 ,  C08G18/65 ,  C08G18/76 ,  C08G101/00 ,  C08J9/33 ,  C08L75/04

Abstract: A process for recycling polyurethanes (PUR), in which the PUR (I) is finely chopped and added in amounts of 0.1-40 wt.% to a reaction mixture for the production of PUR by the polyaddition reaction of (a) polyisocyanates, (b) isocyanate-reactive substances with active hydrogen atoms and optionally (c) chain extenders and/or crosslinkers, catalysts, blowing agents and other normal additives.