Method of preparing a shaped article having a photochromic coating thereon
US6068797A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1998 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Dec 11, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/934
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of preparing a shaped article having a photochromic coating thereon, and curable photochromic powder coating compositions are described. The method includes: applying at least one curable powder coating composition to at least a portion of the interior of a mold, e.g., a lens mold, wherein at least one of the applied powder coating compositions includes a photochromic amount of photochromic material; curing at least partially the applied photochromic powder coating; charging a polymerizable organic casting composition into the mold; polymerizing the casting composition; and removing a shaped article having a photochromic coating on at least a portion of its surface from the mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.