Extrusion powder

Details Extrusion powder Extrusion powder

1974-09-17

1976-04-20

Levin, Stanford M.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 86, 526229, 526250, 428379, C08F 216, C08F 438, C08F 1426

Patent

active

039519309

ABSTRACT:
A tetrafluoroethylene polymer or copolymer suitable e.g. for extrusion on to wire to give an insulated conductor is produced using a dual catalyst system. The first catalyst component is a catalyst giving a high molecular weight (low SSG) such as ammonium persulphate (APS). The second component is a dibasic acid peroxide e.g. disuccinic acid peroxide (DSAP) which is added after the polymerisation has reached 20% conversion. The latter catalyst is found to produce a copolymer powder which can be extruded on to wire to give faultfree coating.

REFERENCES:
patent: 3142665 (1964-07-01), Cardinal et al.

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