Fire retardant polyester-polytetrafluoroethylene compositions
US4191678A · kind A · utility
14Cited by
2References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 1977 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | Aug 24, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for the production of thermoplastic polyester compositions comprising mixing a normally flammable thermoplastic polyester, preferably containing at least 80% by weight of repeating units of ethylene terephthalate, tetramethylene, terephthalate or ethylene-1:2-diphenoxyethane-4,4'-dicarboxylate units, an effective amount of fire-retardant additives and an aqueous colloidal dispersion of PTFE, subjecting the mixture to conditions under which the polyester becomes molten and removing volatile materials from the melt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.