Aqueous dispersions of polytetrafluoroethylene particles

Details Aqueous dispersions of polytetrafluoroethylene particles Aqueous dispersions of polytetrafluoroethylene particles

2008-03-11

2008-03-11

Wu, David W. (Department: 1713)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S545000, C526S242000, C526S250000

Reexamination Certificate

active

10957898

ABSTRACT:
The present invention provides an aqueous non-melt processible polytetrafluoroethylene dispersion comprising non-melt processible polytetrafluoroethylene particles in an amount between 30 and 70% by weight based on the total weight of the dispersion and one or more non-ionic surfactants and wherein at least a part of said non-melt processible polytetrafluoroethylene particles comprise polytetrafluoroethylene polymer chains having repeating units comprising ionic groups. The invention further provides a method for obtaining the dispersions.

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Fluoroplastics, vol. 1, “Non-Melt Processible Fluoroplastics”, p. 168-184, Sina Ebnesajjad, Plastics Design Library, Norwich, NY 2000.

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