Tetrafluoroethylene/fluoroalkoxy trifluoroethylene copolymer com

Details Tetrafluoroethylene/fluoroalkoxy trifluoroethylene copolymer com Tetrafluoroethylene/fluoroalkoxy trifluoroethylene copolymer com

1994-06-22

1995-12-05

Seccuro, Jr., Carman J.

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

Synthetic resins

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

428 357, C08L 2718

Patent

active

054730180

ABSTRACT:
A tetrafluoroethylene/fluoroalkoxy trifluoroethylene copolymer (PFA) composition which has finer spherulite diameters compared to a conventional PFA is provided, so as to give fabricated articles having excellent surface smoothness, and which are free from problems, such as process contamination and the like, caused by leaching. This effect is obtained by incorporating into the composition prior to fabrication a polytetrafluoroethylene having a crystallization temperature of at least 305.degree. C. and a heat of crystallization of at least 50 J/g.

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patent: 5132368 (1992-07-01), Chapman et al.
patent: 5208293 (1993-05-01), Oki et al.
patent: 5317061 (1994-05-01), Chu et al.

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