Initiators for optical coating formulations with reduced yellowness
US8048974B2 · kind B2 · utility
0Cited by
4References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 19, 2008 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Mar 14, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/104
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a acrylated-based optical coating composition containing an organic peroxide initiator which presents a low yellowness level. The initiator has a range of free radical energy that is below a predetermined level. The cure process is controlled by the use a catalyst and a low energy initiator to avoid deleterious reactions that can increase yellowness. The composition is well suited to be applied to a lens and cured in the mold to form a coating with reduced yellowness having high adhesion and abrasion-resistant properties. A dye can be introduced into the composition to form a tinted lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.