Optical fiber coatings
US7169826B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2004 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Jan 14, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F290/067
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Optical fiber coating compositions which compriseat least one ethylenically unsaturated polymerizable compound anda photoinitiator blend, wherein the blend comprises(a) bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and (b) 2,4,6,-trimethylbenzoylethoxyphenylphosphine oxide in an (a):(b) weight:weight ratio of between about 1:10 and about 1:8; or (c) bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, (d) 2,4,6,-trimethylbenzoylethoxyphenylphosphine oxide and (e) 2-hydroxy-2-methyl-1-phenyl-1-propanone in a (c):(d):(e) weight:weight:weight ratio between about 3:1:14 and about 4:1:16; or (f) bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and (g) 2-hydroxy-2-methyl-1-phenyl-1-propanone in a (f):(g) weight:weight ratio of between about 1:3 and about 1:5 exhibit fast photospeed, very low color and fast photobleaching. The photoinitiator blends have low volatility, high shelf life stability and high compatibility with resins and monomers. The photoinitiator blends are for example liquid and easy to use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.