Phosphorescent highway paint composition
US5665793A · kind A · utility
Inventor
Key dates
| Filing date | Apr 1, 1996 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | Apr 1, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/524
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to novel compositions useful, for example, in water-based paints. The compositions contain a moisture sensitive luminescent substance (for example a phosphorescent substance having increased brightness and longer lasting afterglow) and a polyurethane resin which is water miscible or soluble, and which imparts moisture stability to the luminescent substance. As a result, this novel composition when used in, for example, water-based highway paints imparts an extended road surface life, and is environmentally friendly because it does not contaminate the surrounding environment with organic hydrocarbon products via vaporization or runoffs. In addition this paint composition may be used both indoors and outdoors for nighttime marking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.