Invention Grant
- Patent Title: Polyester polyols with long-chain polyether polyol building blocks and use thereof in rigid pur/pir foams
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Application No.: US14782857Application Date: 2014-04-08
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Publication No.: US09701805B2Publication Date: 2017-07-11
- Inventor: Hartmut Nefzger , Uwe Kuenzel , Lutz Brassat
- Applicant: BAYER MATERIALSCIENCE AG
- Applicant Address: DE Leverkusen
- Assignee: Covestro Deutschland AG
- Current Assignee: Covestro Deutschland AG
- Current Assignee Address: DE Leverkusen
- Agent Donald R. Palladino
- Priority: EP13163407 20130411
- International Application: PCT/EP2014/056976 WO 20140408
- International Announcement: WO2014/166898 WO 20141016
- Main IPC: C08G18/42
- IPC: C08G18/42 ; C08G63/672 ; C08J9/14 ; C08G18/76 ; C08G18/09 ; C08G18/40 ; C08G101/00
Abstract:
The invention relates to a polyester polyol which contains building units which are derived from ethylene glycol and/or diethylene glycol and which is characterized in that the polyester polyol furthermore comprises building units which are derived from at least one long-chain polyester polyol with a number-average molar mass of 1500 to 8000 Da. The invention further relates to a process for the production thereof and use thereof, in particular for the production of rigid PUR/PIR foams.
Public/Granted literature
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