Halogen-free flame retardant thermoplastic compositions for wire and cable applications
US9321912B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 2009 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Jan 19, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a halogen-free, flame retardant thermoplastic resin composition based on polypropylene and one or more thermoplastic elastomers with an organic nitrogen- and/or phosphorus-based intumescent flame retardant comprising a piperazine component. The composition is processed easily to make a wire and cable sheath exhibiting a balance of high flame retardancy, good flexibility, high wet electrical resistance and excellent heat deformation properties, and which passes the VW-I flame retardancy test, the UL1581 heat deformation test at 150° C. and the wet electrical resistance test, and also exhibits good tensile and flexibility properties. Also disclosed is a wire and cable sheath made from the composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.