Process aid for melt processable polymers

  • US 7,001,951 B2
  • Filed: 02/11/2003
  • Issued: 02/21/2006
  • Est. Priority Date: 02/16/2001
  • Status: Expired due to Fees
First Claim
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1. A process aid composition for use in an extrudable non-fluorinated melt processable polymer at an extrusion temperature, said process aid composition comprising:

  • A) at least 1 weight percent, based on total weight of said process aid composition, of a fluoroelastomer having a Mooney viscosity, measured per ASTM D1646 at 121°

    C., large rotor, condition ML 1+10 minutes, of 60 to 80; and

    B) at least 1 weight percent, based on total weight of said process aid composition, of an interfacial agent in an amount no more than a 5;

    1 weight ratio of interfacial agent to fluoroelastomer, said interfacial agent being a thermoplastic polymer chemically distinct from said fluoroelastomer and said interfacial agent having a melting point less than said extrusion temperature.

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