Invention Grant
- Patent Title: Process for the preparation of polyisocyanates and use thereof
- Patent Title (中): 制备多异氰酸酯的方法及其用途
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Application No.: US14509202Application Date: 2014-10-08
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Publication No.: US09458097B2Publication Date: 2016-10-04
- Inventor: Frank Richter , Martin Brahm
- Applicant: Bayer MaterialScience AG
- Applicant Address: DE Leverkusen
- Assignee: Covestro Deutschland AG
- Current Assignee: Covestro Deutschland AG
- Current Assignee Address: DE Leverkusen
- Agency: Drinker Biddle & Reath LLP
- Priority: DE102010038845 20100803
- Main IPC: C07C263/16
- IPC: C07C263/16 ; C07D273/04 ; C07D251/34 ; C07F9/54 ; C08G18/02 ; C08G18/16
Abstract:
The invention relates to a process for isocyanate modification which includes reacting a) at least one organic isocyanate having an NCO functionality greater than or equal to 1, b) a catalyst comprising at least one phosphonium salt comprising at least one cycloalkyl substituent bonded directly to a P atom of a phosphonium cation, c) optionally a solvent, and d) optionally additives. The present invention also relates to a catalyst for isocyanate modification comprising at least one phosphonium salt comprising at least one cycloalkyl substituent bonded directly to a P atom of a phosphonium cation.
Public/Granted literature
- US20150025268A1 PROCESS FOR THE PREPARATION OF POLYISOCYANATES AND USE THEREOF Public/Granted day:2015-01-22
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