October 10, 2011

CAS databases provide millions of journal article references from more than 10,000 major scientific journals worldwide, patent and patent family references from 61 patent authorities around the world, and other reputable web sources.

The following patent record is from the CAplusSM database.


Patent Number: US 8026387
Title: Preparation of isocyanates from polyureas formed by polyamine and urea
Inventor(s): Kloetzer, Matthias; Stroefer, Eckhard; Blankertz, Heinrich-Josef
Patent Assignee(s): BASF A.-G., Germany
Source: PCT Int. Appl., 30pp. CODEN: PIXXD2
Language: German

Organic, distillable polyisocyanates, preferably diisocyanates, especially preferred aliphatic or cycloaliph. diisocyanates, are prepared continuously by reacting the corresponding organic polyamines with urea to give low-mol. monomeric polyureas, and subsequently thermally decomposing the polyureas.

Please note:
  Titles for patent records in CAplus are routinely enhanced to better describe the claimed invention. In this example, CAS enhanced the title using additional information found in the patent. The original title of the U.S. granted patent is Method for producing isocyanates. For the CAplus record, this title was enhanced to read Preparation of isocyanates from polyureas formed by polyamine and urea.

View the full-text U.S. patent from USPTO.

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