Phosphorescent highway paint composition
US5874491A · kind A · utility
Inventor
Key dates
| Filing date | Apr 11, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Apr 11, 2017 |
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 marking road surfaces. The compositions contain a moisture sensitive luminescent substance (for example a phosphorescent substance having increased brightness and longer lasting afterglow) and an epoxy resin or a polyurethane resin which is water miscible or soluble, and which impart moisture stability to the luminescent substance. The luminescent substance-resin mixtures may be mixed with water-based highway paints. As a result, these novel compositions impart an extended road surface life, and are environmentally friendly because they do not contaminate the surrounding environment with organic hydrocarbon products via vaporization or runoffs. In addition these compositions may be used both indoors and outdoors for nighttime marking and in other marking applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.