Amide functional ultraviolet light absorbers for polyurethanes and polyureas
US6291586A · kind A · utility
15Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1997 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Oct 31, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/132
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ultraviolet light absorbing material that resists blooming and migration is made up of a polyurethane or polyurea polymer and an amide functional ultraviolet light absorbing compound, wherein the polymer and the amide functional ultraviolet light absorbing compound are hydrogen bonded to one another. Polymeric films that contain a polymeric matrix and the ultraviolet light absorbing material are useful as the top layer in multilayer constructions such as retroreflective sheetings and conformable marking sheets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.