Fluoroelastomer having excellent processability

Details Fluoroelastomer having excellent processability Fluoroelastomer having excellent processability

1989-07-20

1991-01-15

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C08F 1418

Patent

active

049855204

ABSTRACT:
A fluoroelastomer is disclosed which comprises vinylidene fluoride units and hexafluoropropylene units, optionally together with tetrafluoroethylene units, and wherein the amount of tetrafluoroethylene units is 35 to 0% by weight and the weight ratio of vinylidene fluoride units to hexafluoropropylene units is in the range of 80:20 to 40:60. The fluoroelastomer has a relatively low limiting viscosity number and a specific molecular weight distribution. The fluoroelastomer has excellent processability, e.g., excellent roll processability, mold release characteristics and metal-adhesion properties, and is capable of providing a vulcanized rubber having excellent mechanical strength and compression set resistance. The vulcanized rubber is advantageous in the manufacture of O-rings, oil seals, packings, gaskets, diaphragm materials and the like.

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