Polyetrafluoroethylene micropowder compositions

Details Polyetrafluoroethylene micropowder compositions Polyetrafluoroethylene micropowder compositions

2005-10-27

2009-08-25

Zimmer, Marc S. (Department: 1796)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S209000, C524S423000, C524S425000, C524S430000, C524S437000, C524S445000, C524S463000, C524S520000, C524S574000, C526S250000, C526S253000, C526S254000, C526S348800

Reexamination Certificate

active

07579409

ABSTRACT:
A micropowder composition containing a granular PTFE micropowder, a fine powder PTFE micropowder, and a fine powder molding resin provides mixtures with fluoroelastomers containing copolymerized and alternating units of tetrafluoroethylene and propylene that provide molded articles having improved surface smoothness characteristics and tear resistance on molding. Processes for mixing additives with fluoroelastomers by adding or mixing the fluoroelastomer with the additives in the presence of micropowder PTFE compositions.

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