Polymer finishing process

Details Polymer finishing process Polymer finishing process

1992-12-28

1994-06-28

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526212, 526213, 528490, 528492, 528499, C08F 234

Patent

active

053247981

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.

REFERENCES:
patent: 4701504 (1987-10-01), Mitchell et al.
patent: 4711923 (1987-12-01), Zboril
patent: 4818799 (1989-04-01), Chatterjee et al.
patent: 4879141 (1989-11-01), Chatterjee
patent: 5064878 (1991-11-01), Chatterjee

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