Invention Grant
- Patent Title: Continuous production of a PPG-based TPU
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Application No.: US17309421Application Date: 2019-11-29
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Publication No.: US12168712B2Publication Date: 2024-12-17
- Inventor: Frank Schaefer , Michael Freese , Elmar Poeselt , Etsuhiro Yamamoto , Yasuyuki Suzuki , Dai Watanabe , Patrick Drawe
- Applicant: BASF SE
- Applicant Address: DE Ludwigshafen am Rhein
- Assignee: BASF SE
- Current Assignee: BASF SE
- Current Assignee Address: DE Ludwigshafen am Rhein
- Agency: Grüneberg and Myers PLLC
- Priority: EP18209089 20181129
- International Application: PCT/EP2019/083115 WO 20191129
- International Announcement: WO2020/109566 WO 20200604
- Main IPC: C08G18/10
- IPC: C08G18/10 ; C08G18/32 ; C08G18/48

Abstract:
A thermoplastic polyurethane having a glass transition temperature of the soft phase of not more than −25° C. measured using DMA and a heating rate of 2K/min at 1 Hz under torsion based on DIN EN ISO 6721: 2016; maximum G″ can be obtained by a process at least including the reaction of a polyol composition including a polypropylene glycol, wherein the proportion of the secondary terminal OH groups based on the total number of terminal OH groups of the polypropylene glycol is in the range of more than 90%, with a polyisocyanate to obtain a polyol composition including a prepolymer and the reaction of the polyol composition including the prepolymer with a polyisocyanate composition including at least one polyisocyanate and at least one chain extender having a molecular weight
Public/Granted literature
- US20220025097A1 CONTINUOUS PRODUCTION OF A PPG-BASED TPU Public/Granted day:2022-01-27
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