Patent · US Active

Method for producing isocyanates

US8026387B2 · kind B2 · utility

2Cited by

1References

11Claims

0Family size

Assignee

BASF SE

Inventors

Matthias Kloetzer · Kröppen, DE
Eckhard Stroefer · Mannheim, DE
Heinrich-Josef Blankertz · Hamm (Sieg), DE

Key dates

Filing date	Jan 9, 2007
Grant date	Sep 27, 2011
Priority date	—
Expiry date	Jan 13, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2601/14
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a multiple-stage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic poly-amines with ureas to form low-molecular monomeric polyureas, and the thermal decomposition thereof.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.