Transparent coating systems for improving the environmental durability of transparency substrates
US5939188A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Nov 6, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31612
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Transparent substrates having at least one surface coated with a transparent coating system to improve their environmental durability are described. The transparent coating system consists of a combination of components having different properties applied as separate layers to the transparent substrate. A thin layer of a silica-based adhesion promoter is applied directly to at least one surface of the substrate, followed by an organosilane primer layer, then a low modulus polyurethane layer, and, lastly, a thermoset aliphatic polyurethane layer. Alternatively, the low modulus polyurethane may also contain silanol groups or functional groups that can be hydrolyzed to silanol, thereby making a separate primer layer unnecessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.