Retroflective article having a colored layer containing reflective flakes and a dye covalently bonded to a polymer
US6306459A · kind A · utility
20Cited by
24References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Dec 2, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA41D31/325
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Exposed lens retroreflective article 10 that comprises a colored layer 14 and a layer of optical elements 12 that are partially embedded in the colored layer 14. The colored layer 14 comprises reflective flakes 16 and a dye that is covalently bonded to a polymer 18. The articles can retain their color after multiple industrial wash cycles. The use of a reactive dye, reflective flakes, and/or polymer precursor during the preparation of the colored layer enables a launderably-durable colored retroreflective article to be made without the use of a solvent and without the use of a temporary carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.