PIPE LINING WITH HETEROPHASIC POLYOLEFIN COMPOSITIONS AND THERMOSETTING RESIN
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United States of America Patent
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Issued Date -
Jun 12, 2014
app pub date -
Jul 3, 2012
filing date -
Jul 25, 2011
priority date (Note) -
Abandoned
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Abstract
Liner for CIPP rehabilitation comprising a layer of thermoplastic polymer material, a resin absorbent layer, thermosetting hot curing-resin impregnating the absorbent layer; wherein said thermoplastic is a heterophasic polyolefin composition (I) having flexural modulus equal to or lower than 200 MPa, and comprising a crystalline propylene homopolymer (a); and a copolymer or a composition of copolymers of ethylene with other alpha-olefins (b) containing from 15% by weight to less than 40% by weight of ethylene.
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