Dover Chemical Corporation

Nina Bersaglini

Donald R Stevenson

Michael Jakupca

Jacob M Lance

A process is described which reduces the amount of bloom and/or plate-out of phosphite antioxidants during polymer processing by the addition of at least one polyethylene glycol (or blends thereof) or polycaprolactones (or blends thereof) having an average molecular weight of approximately 1,000 to 20,000, most preferably between 4,000 to 10,000.

Method for reducing plate-out of solid phosphites in polymers

A process to stabilize a polymer is described utilizing the step of adding a phosphite reaction product of a triphenyl phosphite or lower molecular weight trialkyl phosphite (e.g., trimethyl phosphite) or triaryl phosphite, with from approximately 1 to 2 moles of preferably a paracumyl phenol, and with from approximately 1 to 2 moles of at least Ccarbon alkyl or Calkenyl alcohol. In one embodiment of the invention, the phosphite reaction product is formula (I) 

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Magnolia, OH, United States of America

Nina Bersaglini