PROCESSING AID FOR THERMOPLASTIC POLYURETHANES
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United States of America Patent
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Issued Date -
Sep 19, 2013
app pub date -
May 13, 2013
filing date -
Oct 15, 2008
priority date (Note) -
Abandoned
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Abstract
A processing aid is used in the processing of thermoplastic polyurethanes to give various articles including a self-supporting film. The processing aid contains a) 10-50% by weight of hydrophobized, at least partially aggregated, metal oxide particles selected from the group consisting of aluminium oxide, silicon dioxide and mixtures thereof, b) 20-75% by weight of one or more thermoplastic polyurethanes, c) 0.5-25% by weight of one or more isocyanates, d) 0.5-15% by weight of one or more compounds which act as lubricant and dispersant, the sum of the constituents a) to d) amounting to at least 90% by weight, based on a total weight of said processing aid.
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