Title:
PRODUCTION OF ISOCYANATE SHOWING LIGHT COLOR
Document Type and Number:
Japanese Patent JPH10306068
Kind Code:
A
Abstract:
To obtain isocyanate showing light color that is useful for production of polyurethane by reaction of phosgene with a specifically treated amine.
An amine as a raw material is treated with an inorganic solid substance that has the Lewis acid and/or Broensted acid centers (points) and the treated amine is allowed to react with phosgene to produce an isocyanate showing light color. This inorganic solid substance is, for example, an artificially modified natural or synthetic oxide and/or silicate salt, particularly aluminum silicate is preferred. The amine is preferably diphenylmethyldiamine and its higher homologues. The amine is preferably treated at 10-50°C under 0.1-10 bar.
Inventors:
KRAUS RUPERT DR
REIF MARTIN DR
BRUCHMANN BERND DR
TESCH HELMUT DR
REIF MARTIN DR
BRUCHMANN BERND DR
TESCH HELMUT DR
Application Number:
JP7019498A
Publication Date:
November 17, 1998
Filing Date:
March 19, 1998
Export Citation:
Assignee:
BASF AG
International Classes:
C07C263/10; C07C265/14; C08G18/76; (IPC1-7): C07C265/14; C07C263/10; C08G18/76
Attorney, Agent or Firm:
Tajiro Taiji (1 person outside)