A process for the preparation of Schiff's bases which contain amino groups, of the formula ##STR1## wherein n is 3 to 12, by reacting cyclic lactams of the formula ##STR2## wherein n is 3 to 12, or of their ring-opened polymers of the formula ##STR3## wherein n is 3 to 12 and m is 1 to 100,000, with inorganic bases at elevated temperature, the reaction being carried out in the presence of inert, high-boiling suspending agents.
A novel aliphatic triisocyanate, a method for producing the same and a polyurethane coating composition prepared therefrom
申请人:TORAY INDUSTRIES, INC.
公开号:EP0013493A1
公开(公告)日:1980-07-23
There is provided a novel aliphatic triisocyanate, 1,6,11-undecanetriisocyanate having the formula,
and a method for production of the same. The novel triisocyanate is produced by reacting 1,6,11-undecanetriamine or one of its salts with phosgene. A non-yellowing polyurethane prepared therefrom provides an excellent coating composition.
Die Herstellung von aminogruppenhaltigen Schiff'- schen Basen durch Umsetzung von cyclischen Lactamen oder deren ringgeöffneten Polymeren mit anorganischen Basen bei erhöhter Temperatur wird bewerkstelligt, indem man die Umsetzung in Gegenwart von inerten hochsiedenden Suspensionsmitteln durchführt.