Polymer cleaning compositions and methods

Details Polymer cleaning compositions and methods Polymer cleaning compositions and methods

1997-03-31

2000-05-09

Johnson, Jerry D.

Cleaning compositions for solid surfaces, auxiliary compositions

Cleaning compositions or processes of preparing

Specific organic component

510476, 510188, C11D 337

Patent

active

06060445&

ABSTRACT:
This invention pertains to cleaning compositions and methods for cleaning a first polymer composition from polymer processing apparatus. The cleaning compositions generally comprise a second polymer composition and at least one metal salt composition wherein the respective metal is selected from alkaline earth and transition metals. The second polymer composition has an affinity, for the first polymer, of "Ad" between 50 and about 1500, where "Ad" is adhesive strength, grams/15 mm width, between the first and second polymer compositions in a multiple layer cast coextruded film. The cleaning composition comprises about 0.001 to about 10 weight percent metal salt composition based on total weight of the cleaning composition. A 50/50 weight percent mixture of the second polymer composition, and a third polymer composition which can be processed in polymer processing apparatus suitable for processing the first polymer composition, preferably has a melt index ratio MI-mix.sub.60 /MI-mix.sub.6 of 0.3/1 to 5/1.

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