Process aid masterbatch for melt processable polymers

1. A process aid masterbatch composition comprising:

A) 0.05 to 25 weight percent, based on total weight of the masterbatch, of a fluoropolymer;

B) 0.2 to 10 weight percent, based on total weight of the masterbatch, of an organic soap selected from the group consisting of carboxylic acids having from 6 to 34 carbon atoms; salts thereof; hydrocarbon sulfonates having from 6 to 34 carbon atoms; and salts thereof;

C) at least 5 weight percent, based on total weight of the masterbatch, of mineral particulate; and

D) a non-fluorinated melt processable polymer.

2. The composition of claim 1 wherein said fluoropolymer is a semi-crystalline fluoropolymer.

3. The composition of claim 1 wherein said fluoropolymer is a fluoroelastomer.

4. The composition of claim 1 wherein said non-fluorinated melt processable polymer is selected from the group consisting of i) high density polyethylene; ii) linear low density polyethylene copolymers; iii) low density polyethylene; iv) polypropylene; and v) copolymers of propylene with other olefins.

5. The composition of claim 1 further comprising an interfacial agent selected from the group consisting of i) silicone-polyether copolymers; ii) aliphatic polyesters; iii) aromatic polyesters; iv) polyether polyols; v) amine oxides; vi) fatty acid esters; and vii) poly(oxyalkylene) polymers.

6. The composition of claim 1 wherein said organic soap is selected from the group consisting of carboxylic acids having from 12 to 28 carbon atoms; salts thereof; hydrocarbon sulfonates having from 12 to 28 carbon atoms; and salts thereof.

7. The composition of claim 6 wherein said organic soap is selected from the group consisting of stearic acid, zinc stearate, calcium stearate, magnesium stearate, montanic acid and metal salts of montanic acid.