Modified polytetrafluoroethylene fine powder and preparation the

Details Modified polytetrafluoroethylene fine powder and preparation the Modified polytetrafluoroethylene fine powder and preparation the

1989-01-27

1990-03-13

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...

523201, 526247, C08F 2500, C08F 1624, C08L 8300

Patent

active

049084100

ABSTRACT:
A modified fine powder polytetrafluoroethylene, and the process for preparing the polymer, in which the modifying copolymerizable monomer is a selected dioxole monomer. The composition is dispersion-process-produced and includes a core portion having a copolymer comprising repeat units provided by tetrafluoroethylene monomer and dioxole monomer, and a shell portion that is substantially free of dioxole units. The core and shell portions may contain perfluoro (n-propylvinyl) ether. The composition is useful for paste extrusion, such as in wire coating and tubing applications.

REFERENCES:
patent: 3978030 (1976-08-01), Rosnick
patent: 4399264 (1983-08-01), Squire
patent: 4565855 (1986-01-01), Anderson et al.
patent: 4594399 (1986-06-01), Anderson et al.
patent: 4639497 (1987-01-01), Knight et al.
patent: 4748217 (1988-05-01), Malhotra
patent: 4754009 (1988-06-01), Squire

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