Thermoplastic compositions improved fire performance containing alkenyl aromataic polymers
US5369157A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1993 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Dec 27, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/521
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermoplastic compositions containing, per 100 parts by weight of a thermoplastic material containing at least one alkenyl aromatic hydrocarbon polymer or copolymer and, if required, at least one other thermoplastic of elastomeric resin: PA1 (a) from 5 to 30 parts by weight of melamine and melamine isocyanurate, PA1 (b) from 2 to 10 parts by weight of at least one polyol containing at least 4 hydroxyl functions per molecule, and PA1 (c) from 0 to 14 parts by weight of at least one organic ester of phosphoric acid. A process for their preparation consists of mixing the various constituents at a temperature higher than the softening point of the alkenyl aromatic hydrocarbon polymer or copolymer, between 150.degree. and 200.degree. C., for a duration between 1 and 5 minutes in an internal mixer or extruder. Articles obtained by transformation of the above compositions are formed having low combustion rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.