Title:
PRODUCTION OF SOLUTION CONTAINING AT LEAST ONE KIND OF ISOCYANATE
Document Type and Number:
Japanese Patent JPH1095763
Kind Code:
A
Abstract:
To obtain the subject solution which does not contain a noticable amount of coloration components at all and contain a relatively low amount of hydrolyzable chlorine by directly treating them with hydrogen at a relatively low temperature and pressure without additive temperature treatment and stress.
A solution containing at least one kind of isocyanate is phosgenated then treated with hydrogen before the perfect removal of the solvent. The treatment with hydrogen is carried out under the pressure of 0.5×105-2.8×105Pa at 70-150°C in the phosgenation reagent. In a preferred embodiment, at least one of the isocyanate is an isocyanate in the group of diphenylmethane diisocyanates.
Inventors:
KRAUS RUPERT DR
TESCH HELMUT DR
BRUCHMANN BERND DR
SEYFERT WILFRIED DR
NEVEJANS FILIP
VAN DEN ABEEL PETER
TESCH HELMUT DR
BRUCHMANN BERND DR
SEYFERT WILFRIED DR
NEVEJANS FILIP
VAN DEN ABEEL PETER
Application Number:
JP17038197A
Publication Date:
April 14, 1998
Filing Date:
June 26, 1997
Export Citation:
Assignee:
BASF AG
International Classes:
C07C263/10; C07C263/18; C07C263/20; C07C265/00; C08G18/70; C08G101/00; (IPC1-7): C07C265/00; C07C263/10; C07C263/18; C08G18/70
Attorney, Agent or Firm:
Tajiro Taiji (1 person outside)
Previous Patent: SUBSTITUTED BENZENE HAVING NOS SYNTHETASE-INHIBITORY ACTION
Next Patent: CYCLIC SULFONE DERIVATIVE
Next Patent: CYCLIC SULFONE DERIVATIVE