Invention Grant
- Patent Title: One-component toughened epoxy adhesives with improved adhesion to oily surfaces and high wash-off resistance
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Application No.: US16936628Application Date: 2020-07-23
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Publication No.: US11034869B2Publication Date: 2021-06-15
- Inventor: Andreas Lutz , Daniel Schneider , Jeannine Flueckiger
- Applicant: DDP SPECIALTY ELECTRONIC MATERIALS US, LLC
- Applicant Address: US DE Wilmington
- Assignee: DDP SPECIALTY ELECTRONIC MATERIALS US, LLC
- Current Assignee: DDP SPECIALTY ELECTRONIC MATERIALS US, LLC
- Current Assignee Address: US DE Wilmington
- Agent Hong Xu
- Main IPC: C09J163/04
- IPC: C09J163/04 ; C08G59/40 ; C08G18/10 ; C09J163/00 ; C08G65/333 ; C08G18/80 ; A61N1/05 ; C08G59/68 ; C08G18/12 ; C08G18/48 ; A61B5/00 ; C08G18/69 ; C08G18/67 ; C08L75/08 ; C08G18/73 ; A61B5/24 ; A61B5/296 ; C08G18/24 ; C08G18/32 ; C08G18/62 ; C08G18/75 ; C01B32/182
Abstract:
Epoxy adhesives include a latent curing agent, a reactive toughener having capped isocyanate groups, and certain urea compounds. The toughener is made by chain extending and capping a mixture of isocyanate-terminated prepolymers. The prepolymers include an isocyanate-terminated polyether and an isocyanate-terminated diene polymer. The adhesives have excellent wash-off resistance and excellent ability to adhere to oily substrates.
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