Flame retardant compositions for buffer tubes and method of making same
US12265270B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2022 |
| Grant date | Apr 1, 2025 |
| Priority date | — |
| Expiry date | Dec 28, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/441
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Embodiments of the disclosure relate to a flame retardant composition. The flame retardant composition includes 70 wt % to 90 wt % of at least one polybutylene terephthalate (PBT) resin, 15 wt % to 25 wt % of a flame retardant additive, an ethylene vinyl alcohol (EVOH), an organoclay synergist, and at least one of a PBT chain extender having epoxide functional groups or a reactive compound including at least two functional groups selected from the group consisting of an epoxide, a maleic anhydride, an isocyanate, an acrylate, and an acetate. The flame retardant composition is particularly suitable for buffer tubes of optical fiber cables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.