Invention Grant
- Patent Title: Self-healing laminate composition, related articles and related methods
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Application No.: US17419781Application Date: 2020-01-29
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Publication No.: US11529648B2Publication Date: 2022-12-20
- Inventor: Muhammad Rabnawaz , Ajmir Khan
- Applicant: BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY
- Applicant Address: US MI East Lansing
- Assignee: BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY
- Current Assignee: BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY
- Current Assignee Address: US MI East Lansing
- Agency: Marshall, Gerstein & Borun LLP
- International Application: PCT/US2020/015581 WO 20200129
- International Announcement: WO2020/160089 WO 20200806
- Main IPC: B05D7/00
- IPC: B05D7/00 ; C09D175/12 ; C09D167/04 ; C09D167/02 ; C09D131/04 ; C09D183/04 ; B05D5/00

Abstract:
The disclosure relates to a self-healing laminate composition. The composition includes a first, self-healing layer with a self-healing polymer and a second, mechanical layer adjacent to the first layer. The second layer includes any desired polymer, for example a crosslinked polymer, a thermoplastic polymer, or a functional thermoset polymer. Self-healing polymers with dynamic covalent bonds are suitable, for example those with dynamic urea bonds and/or dynamic urethane bonds. A self-healing polymer that is damaged can undergo autonomous repair when separated surfaces re-contact each other due to the soft nature of the self-healing polymer, whereupon reversible bonds can reform to rejoin and repair the damaged self-healing polymer. When the self-healing laminate according to the disclosure is damaged, the self-healing mechanism of the first layer can cause the repair of both layers. The self-healing laminate composition can be used as a coating on any of a variety of substrates to provide self-healing properties to a surface of the substrate.
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