Invention Grant
- Patent Title: Method for producing light-coloured polyisocyanates
- Patent Title (中): 浅色多异氰酸酯的制造方法
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Application No.: US14352865Application Date: 2012-10-18
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Publication No.: US09279029B2Publication Date: 2016-03-08
- Inventor: Thomas Ernst Mueller , Christoph Guertler , Axel Scherer-Werke , Stefan Wershofen , Henning Vogt , Walter Leitner
- Applicant: Bayer Intellectual Property GmbH
- Applicant Address: DE Monheim
- Assignee: Bayer Intellectual Property GmbH
- Current Assignee: Bayer Intellectual Property GmbH
- Current Assignee Address: DE Monheim
- Agency: Drinker Biddle & Reath LLP
- Priority: DE102011084965 20111021
- International Application: PCT/EP2012/070613 WO 20121018
- International Announcement: WO2013/057165 WO 20130425
- Main IPC: C08G18/76
- IPC: C08G18/76 ; C07C263/10
Abstract:
The invention relates to a method for producing light-coloured polyisocyanates by phosgenation of mixtures comprising MDA and polycyclic aromatic polyamines that have o-phenylenediamine units incorporated via methylene bridges. The invention further relates to the polyisocyanate mixtures obtainable by this method.
Public/Granted literature
- US20140249289A1 METHOD FOR PRODUCING LIGHT-COLOURED POLYISOCYANATES Public/Granted day:2014-09-04
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