Invention Application
- Patent Title: FILM COMPRISING POLYAMIDE POLYURETHANE LAYER
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Application No.: PCT/IB2021/052785Application Date: 2021-04-02
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Publication No.: WO2021205311A1Publication Date: 2021-10-14
- Inventor: LU, Yongshang , HO, Charlie C.
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: 3M Center
- Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee Address: 3M Center
- Agency: FISCHER, Carolyn A. et al.
- Priority: US63/008,029 2020-04-10
- Main IPC: B32B7/12
- IPC: B32B7/12 ; B32B27/08 ; B32B27/18 ; B32B27/34 ; B32B27/36 ; B32B27/40 ; B32B27/42
Abstract:
A multilayer film is described comprising a first film layer comprising an organic polymeric material, wherein the first film layer has an elongation of at least 250%; and a second film layer comprising a crosslinked polyurethane wherein the polyurethane comprises polymerized units of a polyamide. In some embodiments, the organic polymeric material of the first film layer comprises polyurethane. Also described is a method of protecting a surface of a motor vehicle and a method of making a multilayer protective film.
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