Photoinitiators that are polymeric or polymerizable for use in UV curable pressure sensitive adhesives
US10526426B2 · kind B2 · utility
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3References
8Claims
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Key dates
| Filing date | Sep 12, 2017 |
| Grant date | Jan 7, 2020 |
| Priority date | — |
| Expiry date | Jan 13, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2037/1215
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are photoinitiators that are ultra violet (UV) reactive. The photoinitiators can be polymerized into polymeric backbones for use in UV curable hot melt pressure sensitive adhesives. The preferred polymeric backbones are acrylic-based polymers. The photoinitiators are very UVC sensitive and have excellent hot melt viscosity stability that is many fold higher than existing photoinitiators. The subject photoinitiators feature aryl ketones linked through an ether linkage to a variety of connector sequences that allow for polymerization of the photoinitiators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.