Terpolymers of chlorotrifluoroethylene, or tetrafluoroethylene, ethylene and perfluoroisoalkoxy perfluoroalkyl ethylenes
AssigneeAusimont, U.S.A., Inc.
InventorsHerbert K. Reimschuessel, Forrest J. Rahl, Harry E. Ulmer
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Abstract
This invention relates to terpolymers of chlorotrifluoroethylene, ethylene and perfluoroalkoxyperfluoroalkyl ethylene which have improved resistance to thermal stress cracking and improved high temperature properties.
Claims21
A solid copolymer of from about 40 to 60 mole percent of chlorotrifluoroethylene or tetrafluoroethylene from about 40 to 60 mole percent of ethylene and an effective amount of one or more perfluoroisoalkoxy perfluoroalkyl ethylenes having the formula:
- ##STR4## wherein:
- n is an integer of from about 2 to about 5;
- R.sub.1 is perfluoroisoalkyl having from about 3 to about 8 carbon atoms;
- R.sub.2 and R.sub.3 are the same or different and are fluorine or perfluoroalkyl having from 1 to about 4 carbon atoms;
- and
- an effective amount is an amount sufficient to improve the thermal stress-cracking characteristics of copolymers of ehtylene and chlorotrifluoroethylene.
A solid copolymer of from about 40 to 60 mole percent of chlorotrifluoroethylene, from about 40 to 60 mole percent of ethylene and from about 0.1 to about 10 mole percent of at least one perfluoroisopropoxyperfluoroalkylethylene having the formula:
- ##STR5## wherein n is an integer of 2 to 5 and wherein R.sub.f is the same or different at each occurrence and is fluorine or trifluoromethyl.
A solid copolymer of about 40 to about 60 mole percent of tetrafluoroethylene, from about 40 to about 60 mole percent of ethylene and from about 0.1 to about 10 mole percent of at least one perfluoroisopropoxyperfluoroalkylethylene having the formula:
- ##STR7## wherein n is an integer of from about 2 to about 5 and wherein R.sub.f is the same or different at each occurrence and is fluorne or trifluoromethyl.
A solid copolymer which comprises:
- (a) from about 40 to about 60 mole percent of chlorotrifluoroethylene or trifluoroethylene;
- (b) from about 40 to about 60 mole percent of ethylene;
- and
- (c) from about 0.1 to about 10 mole percent of one or more perfluoroisoalkoxy perfluoroalkyl substituted ethylene moieties of the formula;
- ##STR9## wherein:
- n is an integer of from about 2 to about 5;
- R.sub.1 is perfluoroisoalkyl having from about 3 to about 8 carbon atoms;
- and
- R.sub.2 and R.sub.3 are the same or different, and are fluorine or perfluoroalkyl having from 1 to about 4 carbon atoms.
Dependencies are inferred from the claim text.