Janice E Sanders

US Patent:

53247981, Jun 28, 1994

Filed:

Dec 28, 1992

Appl. No.:

7/997527

Inventors:

Janice E. Sanders - Bound Brook NJ
George N. Foster - Bloomsbury NJ
Edgar C. Baker - Bridgewater NJ

Assignee:

Union Carbide Chemicals & Plastics Technology Corporation - Danbury CT

International Classification:

C08F 234

US Classification:

526123

Abstract:

A finishing process for a polymer containing an active catalyst residue. Starting polymer has a crystallinity of less than 10 percent by weight and is maintained in an essentially oxygen free reaction zone at a temperature less than polymer sticking temperature. The polymer is stabilized and acids neutralized by adding 2, 6-di-tert-butyl-4-alkyl phenol and/or alkyl -3-(3-5 -di-tert-butyl-4-hydroxy phenyl)- propionate and zinc oxide, hydrotalcite, or a zeolite. Resulting polymer is then treated with catalyst deactivators including water, and then mixed with photo-oxidative stabilizers.