Reactive purge compound for polymer purging

Details Reactive purge compound for polymer purging Reactive purge compound for polymer purging

2009-07-14

2011-12-20

Webb, Gregory (Department: 1761)

Cleaning compositions for solid surfaces, auxiliary compositions

Cleaning compositions or processes of preparing

For cleaning a specific substrate or removing a specific...

C510S245000, C510S445000, C134S007000, C134S022100, C134S022120, C134S022170

Reexamination Certificate

active

08080506

ABSTRACT:
The present invention relates to reactive purge compound for cleaning polymer processing equipment wherein the reactive purge compound that includesi) at least about 50 wt.% of a polymeric carrier component based on the total weight of the reactive purge compound; andii) a chain scission catalyst component dispersed in the polymeric carrier component;whereina) the chain scission catalyst component includes a chain scission catalyst selected from the group consisting of at least one alkali metal hydroxide, at least one alkaline earth metal hydroxide, and any combination thereof;b) the reactive purge compound further comprises a water generating component; orc) both (a) and (b);wherein the reactive purge compound is a feedstock material in the form of a plurality of pellets, granules, rods, powder or other particles.

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International Search Report and Written Opinion of the International Searching Authority for copending international patent application PCT/US2010/040646, mailed on Sep. 23, 2010.
Written Opinion of the International Preliminary Examining Authority for copending international patent application PCT/US2010/040646, mailed on Sep. 7, 2011.

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