公开(公告)号：JP2001213936A

公开(公告)日：2001-08-07

申请号：JP2001028091

申请日：2001-02-05

Applicant: BASF AG

Inventor： BRUCHMANN BERND ,  MOHRHARDT GUNTER ,  RENZ HANS ,  JAHME JOACHIM

IPC: C08G18/79 ,  C08G18/72 ,  C08G18/78 ,  C08G18/80 ,  C09D175/04

Abstract: PROBLEM TO BE SOLVED: To provide a polyisocyanate storable for a longer time without undergoing substantial changes in its characteristics. SOLUTION: A polyisocyanate-containing mixture comprises (a) a polyisocyanate (polyisocyanate A) obtained from an aliphatic or alicyclic diisocyanate (diisocyanate C) and having a structural unit selected from an isocyanurate group and a biuret group, and (b) a polyisocyanate (polyisocyanate B) other than A having a structural unit selected from an allophanate group and a urethane group obtained from (b1) an aliphatic or alicclic diisocyanate (diisocyanate C) and (b2) a polyvalent aliphatic or alicyclic alcohol (alcohol A). At this time, the molar ratio of the polyisocyanarte A to the polyisocyanate B is caused to be 200:1 to 5:1.

公开(公告)号：ES2119567T3

公开(公告)日：1998-10-01

申请号：ES96903959

申请日：1996-02-01

Applicant: BASF AG

Inventor： BRUCHMANN BERND ,  WOLFF STEFAN ,  HEIDER WOLFGANG ,  JAHME 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：ES2167018T3

公开(公告)日：2002-05-01

申请号：ES97938925

申请日：1997-08-18

Applicant: BASF AG

Inventor： BRUCHMANN BERND ,  REIF MARTIN ,  HOFSCHEUER WERNER ,  JAHME JOACHIM ,  LANGER WERNER ,  RENZ HANS

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

Abstract: A process for preparing biuret-functional polyisocyanates from at least one aliphatic or cycloaliphatic diisocyanate and from at least one amine or water or a mixture thereof as reactants involves mixing the reactants with one another in a mixing unit having a high shear action.