Optical fibre having a crosslinked polyester coating
US11834367B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 19, 2018 |
| Grant date | Dec 5, 2023 |
| Priority date | — |
| Expiry date | Jan 27, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D133/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An optical fibre comprising: an optical waveguide comprising a glass core surrounded by a glass cladding; a coating surrounding said optical waveguide comprising a polymer material comprising a cured polyester obtained by: (a) esterification of a reactant (A) selected from carboxylic acids, triglycerides, and mixtures thereof, having a C16-C24 aliphatic chain comprising at least two conjugated double bonds, with a reactant (B) selected from polyols having at least 3 hydroxyl groups, the polyols being thermally stable up to 300° C.; (b) curing of the 10 so obtained polyester, in the presence of a transition metal salt, the transition metal being selected from Mn, Fe, Co, Cu, and Ni. Preferably, the step of curing is a thermal curing, preferably up to 300° C. The transition metal salt acts as curing accelerator, i.e. it increases the curing rate so as to match the optical fibre drawing speed, the temperature of the glass exiting the drawing step and the drawing tower height commonly used in industrial plants for optical fibre production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.