TFE-based thermoprocessable copolymers

Details TFE-based thermoprocessable copolymers TFE-based thermoprocessable copolymers

2005-07-28

2009-06-09

Keys, Rosalynd (Department: 1621)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C568S674000

Reexamination Certificate

active

07544752

ABSTRACT:
TFE-based thermoprocessable copolymers having the following composition, expressed in percentage by moles on the total of the monomers:A) from 0.01 to 15% of the monomer of formula:in-line-formulae description="In-line Formulae" end="lead"?CF2═CFOCF2OCF3  (a);in-line-formulae description="In-line Formulae" end="tail"?A1) tetrafluoroethylene from 99.99 to 85%; optionallyB) one or more (per)fluorinated comonomers having at least one unsaturation of ethylene type, different from TFE;the sum of the molar percentages A)+B) being such as to give polymers showing at least one melting peak at the thermogravimetric analysis (DSC).

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