Process for producing plastic lens
US5310577A · kind A · utility
38Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Feb 21, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2075/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a plastic lens, which comprises: PA1 (1) applying a primer coating composition composed mainly from a blocked polyisocyanate and a polyol onto a surface of a plastic lens substrate and heating the primer coating composition to form a primer layer of a thermoset polyurethane, the blocked polyisocyanate being a polyisocyanate blocked with a .beta.-diketone, PA1 (2) forming a hard coating layer on the primer layer, and PA1 (3) vapor-depositing an inorganic material or inorganic materials on the hard coating layer to form a single-layered or multi-layered anti-reflection coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.