Transparent polyurethane protective coating, film and laminate compositions with enhanced electrostatic dissipation capability, and methods for making same
US9580564B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2010 |
| Grant date | Feb 28, 2017 |
| Priority date | — |
| Expiry date | Dec 10, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31609
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention is embodied in a transparent, polyurethane laminate or multi-layer coating comprising a first transparent polyurethane layer, a middle conductive material layer disposed on the first transparent polyurethane layer, and a second transparent polyurethane layer disposed on the conductive layer. In one embodiment, the subject invention addresses the problem of static charge buildup on aircraft transparencies by allowing charge to drain through the second transparent polyurethane layer to the conductive material layer and then to the edge of the conductive material layer, where it is mated to the airframe. The present invention is also embodied in a method for forming a transparent polyurethane laminate on a transparent substrate and a method for forming a free-standing laminate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.