Claims
- 1. A process for the preparation of a non-free flowable, non-dusting molding powder having a bulk density of at least 450 g/l which comprises grinding a suspension polymer with units of tetrafluoroethylene and 0.01 to 1% by weight of units of at least one perfluoro(alkyl-vinyl) ether with an alkyl group of 1 to 4 carbon atoms to a particle diameter d.sub.50 of 10 to 50 .mu.m and agglomerating the particles in a medium of water without the presence of organic solvent to give an average agglomerate diameter d.sub.50 of about 30 to about 100 .mu.m.
- 2. The process as claimed in claim 1, wherein the polymer contains 0.02 to 0.5% by weight of the ether.
- 3. The process as claimed in claim 1, wherein the polymer is ground to a particle diameter d.sub.50 of 15 to 25 .mu.m.
- 4. The process as claimed in claim 1, wherein an agglomerate diameter of about 40 to about 90 .mu.m is established.
- 5. A process for compression molding which comprises shaping an article from a molding powder as claimed in claim 1 to form a preform and sintering this preform.
Priority Claims (1)
Number |
Date |
Country |
Kind |
195 47 907 |
Dec 1995 |
DEX |
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Parent Case Info
This is a division of Ser. No. 08/771,785 filed Dec. 20, 1996.
US Referenced Citations (13)
Divisions (1)
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Number |
Date |
Country |
Parent |
771785 |
Dec 1996 |
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