Terpolymers of tetrafluoroethylene, ethylene and perfluoroalkyl vinyl monomer and process for producing the same
US4123602A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1978 |
| Grant date | Oct 31, 1978 |
| Priority date | — |
| Expiry date | Jan 9, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymers of tetrafluoroethylene and ethylene essentially consist of components of from 40 to 60 mole % of tetrafluoroethylene, 40 to 60 mole % of ethylene and 0.1 to 10 mole % of perfluoroalkyl vinyl component having the formula EQU CH.sub.2 .dbd. CH--C.sub.n F.sub.2n + 1 wherein n is an integer of 2 to 10. Said copolymer has a volumetric flow rate of 10 to 500 mm.sup.3 /sec. defined in the specification. The copolymers of tetrafluoroethylene and ethylene are produced by copolymerizing tetrafluoroethylene and ethylene with a molar ratio of C.sub.2 F.sub.4 /C.sub.2 H.sub.4 being kept essentially higher than 40/60 in the reactor in the presence of a small amount of a perfluoroalkyl vinyl monomer having the formula EQU CH.sub.2 .dbd. CH--C.sub.n F.sub.2 + 1 wherein n is an integer of 2 to 10. This is a continuation of application Ser. No. 689.526, filed May 24, 1976, now abandoned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.