Fluoroelastomer containing polyethylene composition and process

Details Fluoroelastomer containing polyethylene composition and process Fluoroelastomer containing polyethylene composition and process

1985-06-11

1986-04-08

Lilling, Herbert J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524495, 525199, C08K 304

Patent

active

045814066

ABSTRACT:
A composition comprising 2-3 wt. % carbon black, 25-1000 ppm and preferably 75-250 ppm of a fluoroelastomer and the remainder polyethylene is disclosed. The fluoroelastomer prevents die buildup during extrusion of the composition which is believed to be caused by moisture associated with the carbon black. Alternatively, the die may be conditioned by extruding polyethylene containing 0.5-5 wt. % of the fluoroelastomer and then carbon black containing polyethylene without the fluoroelastomer can be extruded for a substantial period before die buildup begins to occur.

REFERENCES:
patent: 3125547 (1964-03-01), Blatz
patent: 3851018 (1974-11-01), Kelly
patent: 3898361 (1975-08-01), Bjerk
patent: 4045402 (1977-08-01), Bjerg
patent: 4252858 (1981-02-01), Chao et al.
Chem. Abs. 101-('84) 193414y, Stevens "Rubber World" 1984 190(6).
C. K. Shih, "Rheological Properties of Incompatible Blends of Two Elastomers", Nov. 1976.
R. C. Kanu and M. T. Shaw, "Rheology of Polymer Blends: Simultaneous Slippage and Entrance Pressure Loss in the Ethylene-Propylene-Diene (EPDM)/Viton System", Jun. 1982.

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