Patent · US Active

Process for the preparation of liquid, storage-stable organic isocyanates of low color number containing carbodiimide and/or uretonimine groups

US8022200B2 · kind B2 · utility

3Cited by

9References

10Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Stefan Wershofen · Mönchengladbach, DE
Manfred Schmidt · Krefeld, DE
Hans-Georg Pirkl · Leverkusen, DE
Nobuhiro Kamiyama · Kasai, JP
Shinichi Murakami · Osaka, JP
Tetsuo Harada · Moriguchi, JP

Key dates

Filing date	Jul 1, 2005
Grant date	Sep 20, 2011
Priority date	—
Expiry date	May 3, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/089
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of liquid, storage-stable isocyanate mixtures which are characterized by a low color number and which contain carbodiimide (CD) and/or uretonimine (UI) groups. This invention also relates to the isocyanate mixtures obtained by this process, to their use for the preparation of blends with further isocyanates, and to the preparation of prepolymers containing isocyanate groups and of polyurethane plastics, preferably polyurethane foams from these isocyanate mixtures.

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