High transparency and high flexibility elastoplastic polyolefin compositions
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United States of America Patent
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Jun 21, 2005
Grant Date -
Jun 5, 2003
app pub date -
Nov 27, 2002
filing date -
Jun 24, 1996
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Abstract
Highly transparent and flexible elastoplastic polyolefin compositions which contain A) 10-20 parts by weight of a propylene homopolymer or copolymer with ethylene and/or one or more CH2═CHR α-olefins, the copolymer containing at least 95% by weight of propylene; B) 5-20 parts by weight of propylene copolymer fraction containing ethylene and insoluble in xylene at room temperature; and C) 60-80 parts by weight of a propylene copolymer fraction containing a comonomer selected from ethylene and mixtures of ethylene with one or more CH2═CHR α-olefin and soluble in xylene at room temperature, the fraction containing from 15 to 25% by weight of the comonomer, the percent by weight of the sum of the B and C components with respect to the total polyolefin composition being from 80% to 90%.
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