Enhanced dye durability through controlled dye environment
US6498218B2 · kind B2 · utility
1Cited by
40References
8Claims
0Family size
Inventors
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/903
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An interpenetrating polymer network (IPN) or semi-interpenetrating polymer network (semi-IPN) comprises a first phase which is continuous and comprises a flexible polymer and a second phase which is a fluorescent or nonfluorescent durable dispersed or continuous phase and comprises a dye and a polymer, wherein the polymer enhances durability of the dye. Such networks are particularly useful in fluorescent traffic signs or safety devices or in pavement marking tape or paint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.