公开(公告)号：DE3232461A1

公开(公告)日：1984-03-01

申请号：DE3232461

申请日：1982-09-01

Applicant: BAYER AG

Inventor： NIEDERDELLMANN GEORG DR ,  GRIGAT ERNST PROF DR

IPC: C08J11/00 ,  B29B11/00 ,  B29B17/00 ,  C08J11/04 ,  C08J11/24 ,  B29C29/00 ,  C08L75/00

Abstract: A process for the continuous glycolytic cleavage of polyurethane plastics waste in multi-shaft screw machines by the addition of optionally preheated diols, at a degradation temperature of 250 DEG C., while maintaining a pressure at least such that the polyurethane-diol mixture is in the liquid phase, by the discharge of the glycolysate mixture after short residence times of from 2 to 30 minutes in the reaction screw, and by rapid cooling of the glycolysate mixture.

公开(公告)号：DE3579992D1

公开(公告)日：1990-11-08

申请号：DE3579992

申请日：1985-10-01

Applicant: BAYER AG

Inventor： RASSHOFER WERNER DR ,  GRIGAT ERNST PROF DR ,  GROEGLER GERHARD DR ,  HESS HEINRICH DR ,  KOPP RICHARD DR

IPC: C08G18/00 ,  C08G18/10 ,  C08G18/40 ,  C08G18/46 ,  C08G18/50 ,  C08G18/65

Abstract: High molecular weight amines having reduced low molecular weight amine contents are obtained by reacting a mixture of (1) a high molecular weight amine and (2) a low molecular weight amine with (3) an isocyanate in quantities such that from 0.5 to 10 equivalents of isocyanate are present for each equivalent of low molecular weight amine. The product of high molecular weight amines is particualrly useful in the production of isocyanate addition products such as polyurethane plastics and foams.

公开(公告)号：DE3437632A1

公开(公告)日：1986-04-17

申请号：DE3437632

申请日：1984-10-13

Applicant: BAYER AG

Inventor： RASSHOFER WERNER DR ,  GRIGAT ERNST PROF DR ,  GROEGLER GERHARD DR ,  HESS HEINRICH DR ,  KOPP RICHARD DR

IPC: C08G18/00 ,  C08G18/10 ,  C08G18/40 ,  C08G18/46 ,  C08G18/50 ,  C08G18/65 ,  C08G63/76 ,  C08G65/32 ,  C08G65/48 ,  C08G59/50 ,  C08G14/06

Abstract: High molecular weight amines having reduced low molecular weight amine contents are obtained by reacting a mixture of (1) a high molecular weight amine and (2) a low molecular weight amine with (3) an isocyanate in quantities such that from 0.5 to 10 equivalents of isocyanate are present for each equivalent of low molecular weight amine. The product of high molecular weight amines is particualrly useful in the production of isocyanate addition products such as polyurethane plastics and foams.

公开(公告)号：DE3165071D1

公开(公告)日：1984-08-30

申请号：DE3165071

申请日：1981-08-31

Applicant: BAYER AG

Inventor： NIEDERDELLMANN GEORG DR ,  ROEMER NORBERT ING GRAD ,  SCHENK JURGEN ING GRAD ,  HETZEL HARTMUT DR ,  GRIGAT ERNST PROF DR

IPC: C08G18/00 ,  C08G18/82 ,  C08J11/00 ,  C08J11/10 ,  C08L75/08

公开(公告)号：DE2964320D1

公开(公告)日：1983-01-20

申请号：DE2964320

申请日：1979-12-05

Applicant: BAYER AG

Inventor： NIEDERDELLMANN GEORG DR ,  ROEMER NORBERT ING GRAD ,  GRIGAT ERNST PROF DR

IPC: C08G18/00 ,  C08G18/82 ,  C08J11/04 ,  C08J11/16 ,  C08L75/04