Stabilizer in solid form for organic polymers
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United States of America Patent
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May 2, 2000
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app pub date -
Feb 18, 1998
filing date -
Feb 20, 1997
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Abstract
Solid form of a stabilizer for organic polymers consisting of one or more tocopherols, as such or in formulation, absorbed on porous polypropylene with a high crystallinity, in a quantity ranging from 30% to 85% by weight. The above tocopherols, as such or in formulation, can also be used in a mixture with other stabilizers such as, for example, secondary antioxidants containing phosphorous or sulfur, sterically hindered phenols and sterically hindered amines.
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