Synthetic resins or natural rubbers -- part of the class 520 ser – Antistatic compositions – Contains metal – boron – phosphorus – or silicon
Reexamination Certificate
2007-10-09
2008-09-30
Zucker, Paul A (Department: 1621)
Synthetic resins or natural rubbers -- part of the class 520 ser
Antistatic compositions
Contains metal, boron, phosphorus, or silicon
C562S030000
Reexamination Certificate
active
07429628
ABSTRACT:
A method for preparing a thermoplastic composition containing an antistatic agent is described. The antistatic agent is a phosphonium sulfonate salt that is prepared by a method that includes combining in an aqueous medium sodium hydroxide and/or lithium hydroxide, a sulfonyl fluoride compound, and a phosphonium halide compound; and separating the phosphonium sulfonate from the aqueous medium. The phosphonium sulfonate salt is then combined with a thermoplastic resin.
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Hoeks Theodorus Lambertus
Leenders Chiel Albertus
van de Grampel Robert Dirk
SABIC Innovative Plastics IP B.V.
Zucker Paul A
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