Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1992-08-28
1993-11-30
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525199, 526254, C08F21426, C08F21428
Patent
active
052666395
ABSTRACT:
Copolymers of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP) having high HFP content and end-of-melting temperature, T.sub.m (end), as low as 200.degree. C. are disclosed. Exceptional performance as a processing aid in polyolefins results from having T.sub.m (end) of the TFE/HFP copolymer close to the processing temperature of the polyolefin. These TFE/HFP copolymers are soluble in fluorinated cyclic solvents. Copolymer/solvent systems copolymer at significant concentrations in selected solvents are fluid and stable at room temperature.
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Dissolution of Poly(tetrafluoroethylene) by Paul Smith and K. H. Gardner from Macromolecules, 1985, 18, 1222.
Chapman, Jr. George R.
Crenshaw Lewis E.
McMinn Rita S.
Morgan Richard A.
Priester Donnan E.
E. I. Du Pont de Nemours and Company
Sarofin N.
Schofer Joseph L.
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