Patent · US Active

Process for preparing polyurethanes

US8592497B2 · kind B2 · utility

1Cited by

3References

26Claims

0Family size

Assignee

BASF SE

Inventors

Hans-Juergen Reese · Olching, DE
Imbridt Murrar · Senftenberg - Zły Komorow, DE
Ralf Fritz · Bohmte, DE
Andres Cabrera · Osnabrück, DE
Birgit Magg · Damme, DE

Key dates

Filing date	Apr 3, 2007
Grant date	Nov 26, 2013
Priority date	—
Expiry date	Jun 8, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L83/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of polyurethanes by reacting polyisocyanates a) with compounds having at least two hydrogen atoms reactive with isocyanate groups b), wherein a polyisocyanate a) used is at least one polyisocyanate ai) having an average functionality of greater than 2, a content of diisocyanates of not more than 2% by weight and a content of uretonimines of not more than 4% by weight, based in each case on the weight of the polyisocyanate ai).

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