Process for the stabilization of a stabilizer mixtures for recycled plastic mixtures
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United States of America Patent
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Feb 25, 2003
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Sep 17, 1997
filing date -
Sep 25, 1992
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Abstract
Recycled mixtures of plastics, predominantly thermoplastics, as predominantly produced in the household, in commerce and also in industry and useful material collections, can be stabilized against thermooxidative degradation by adding a combination of a sterically hindered phenol with an organic phosphite or phosphonite and an inorganic compound from the series consisting of metal oxides, hydroxides and carbonates.
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