公开(公告)号：CA2163405A1

公开(公告)日：1996-06-10

申请号：CA2163405

申请日：1995-11-21

Applicant: BASF AG

Inventor： WOLFF STEFAN ,  HEIDER WOLFGANG ,  LANGER WERNER ,  RENZ HANZ

IPC: C07C273/18 ,  C07C275/62 ,  C08G18/78 ,  C08G18/79

Abstract: the invention relates to a process for the preparation of biuret-containing polyisocyanates by catalytic reaction of aliphatic and/or cycloaliphatic diisocyanates with a biuretizing agent, where the biuretizing agent employed is water in finely disperse form and the reaction is carried out in the presence of OH-acidic compounds.

公开(公告)号：ZA9707399B

公开(公告)日：1999-02-18

申请号：ZA9707399

申请日：1997-08-18

Applicant: BASF AG

Inventor： BRUCHMANN BERND ,  REIF MARTIN ,  HOFSCHEUER WERNER ,  JAEHME JOACHIM ,  LANGER WERNER ,  RENZ HANS ,  MOHRHARDT GUENTER ,  SCHIESSL MICHAEL

IPC: C07C273/18 ,  C07C275/62 ,  C08G18/08 ,  C08G18/30 ,  C08G18/32 ,  C08G18/78 ,  C08G ,  C08J ,  C09D

CPC classification number: C08G18/7831 ,  C07C273/1827 ,  C08G2101/0008 ,  C08G2101/0025 ,  C07C275/62

公开(公告)号：AT169042T

公开(公告)日：1998-08-15

申请号：AT96903959

申请日：1996-02-01

Applicant: BASF AG

Inventor： BRUCHMANN BERND ,  WOLFF STEFAN ,  HEIDER WOLFGANG ,  JAEHME JOACHIM ,  LANGER WERNER ,  RENZ HANS

IPC: C08G18/02 ,  C07C265/14 ,  C07C273/18 ,  C07C275/62 ,  C08G18/30 ,  C08G18/78

Abstract: A process for the preparation of polyisocyanates which contain one or more biuret groups, by reacting a) an aliphatic or cycloaliphatic isocyanate containing two or more isocyanate groups (isocyanate a) with b) a tertiary alcohol or a mixture of water and a tertiary alcohol (biuretizing agent b) at from 100 to 250° C., which comprises carrying out the reaction in the presence c) of a stabilizer (c) which constitutes a catalytic amount of urea, ammonia, biuret, a urea derivative of the formula I in which R 1 , R 2 , R 3 and R 4 are hydrogen, C 1 to C 10 alkyl or C 5 to C 10 aryl, or a carboxamide of the formula II in which R 5 is C 1 to C 12 alkyl which is unsubstituted or in which 1, 2 or 3 hydrogen atoms are replaced by a radical

公开(公告)号：AU5119798A

公开(公告)日：1998-05-22

申请号：AU5119798

申请日：1997-10-16

Applicant: BASF AG

Inventor： HOKAMA TAKEO ,  CLOUDSDALE IAN S ,  LANGER WERNER ,  SCHNEIDER HERMANN DR

IPC: C07D405/04 ,  C07D239/52

Abstract: A process for preparation of substituted phthalides, heterocyclic phthalides and derivatives thereof by reacting an aromatic carboxylic acid mono- or di-anion with a reactive derivative of a pyrimidine carboxylic acid.

公开(公告)号：ZA961170B

公开(公告)日：1997-08-14

申请号：ZA961170

申请日：1996-02-14

Applicant: BASF AG

Inventor： BRUCHMANN BERND ,  WOLFF STEFAN ,  HEIDER WOLFGANG ,  JAEHME JOACHIM ,  LANGER WERNER ,  RENZ HANS

IPC: C08G18/02 ,  C07C265/14 ,  C07C273/18 ,  C07C275/62 ,  C08G18/30 ,  C08G18/78 ,  C07C ,  C08G

Abstract: A process for the preparation of polyisocyanates which contain one or more biuret groups, by reacting a) an aliphatic or cycloaliphatic isocyanate containing two or more isocyanate groups (isocyanate a) with b) a tertiary alcohol or a mixture of water and a tertiary alcohol (biuretizing agent b) at from 100 to 250° C., which comprises carrying out the reaction in the presence c) of a stabilizer (c) which constitutes a catalytic amount of urea, ammonia, biuret, a urea derivative of the formula I in which R 1 , R 2 , R 3 and R 4 are hydrogen, C 1 to C 10 alkyl or C 5 to C 10 aryl, or a carboxamide of the formula II in which R 5 is C 1 to C 12 alkyl which is unsubstituted or in which 1, 2 or 3 hydrogen atoms are replaced by a radical