Tintable coatings for glass ophthalmic lenses
US4977029A · kind A · utility
8Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1988 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Jul 5, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates to coatings for application to glass lenses to provide a tint thereto. The coatings at a thickness of no more than 10 microns in conjunction with organic dyes conventionally used to tint organic plastic lenses will impart a visible transmission of less than 50%, preferably less than 30%. The coatings consist essentially of an alkyl siloxane containing a dipolar silane selected from the group consisting of an ester-functional silane, a hydroxy-functional silane, amino-functional silane, a carboxylic acid-functional silane, and a halide form of those silanes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.