Use Of Carbon Black For Reducing Shrinkage Of Polyolefin Composition
Patent No. EP3960800 (titled "Use Of Carbon Black For Reducing Shrinkage Of Polyolefin Composition") was filed by Borealis on Aug 27, 2020. The application was issued on Oct 23, 2024.
Patent Summary
This invention provides the use of carbon black to reduce the shrinkage of a polyolefin composition to below 0.9%, measured according to specification. The composition comprises a polyolefin polymer and carbon black in an amount from 0.05 to 2 wt.% based on the total composition weight. The polyolefin polymer may be a multimodal ethylene copolymer, such as a bimodal high-density ethylene 1-butene copolymer. These compositions are intended for use as cable layers, specifically for jacketing communication cables like fiber optic cables, where minimizing shrinkage is critical to prevent fiber attenuation and signal loss. The invention specifically identifies that reducing the carbon black content within the specified range decreases shrinkage while maintaining the melt flow rate (MFR2) of the composition.
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Date
Description
EP3960800
- Application Number
- EP20193052A
- Filing Date
- Aug 27, 2020
- Status
- Granted And Under Opposition
- Sep 19, 2024
- Publication Date
- Oct 23, 2024
- External Links
- Slate, Register , Google Patents