HOT MELT ADHESIVE COMPOSITIONS THAT INCLUDE A MODIFIED PROPYLENE-ALPHA-OLEFIN POLYMER AND EXHIBIT LOW BLEED THROUGH
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United States of America Patent
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Issued Date -
Dec 27, 2012
app pub date -
Jun 21, 2012
filing date -
Jun 27, 2011
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Abandoned
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Abstract
A hot melt adhesive composition that includes a propylene-alpha-olefin polymer including at least 50 mole % propylene and has a ratio of z average molecular weight (Mz) to number average molecular weight (Mn) (Mz/Mn) from greater than 20 and no greater than 50, a ratio of Mz to weight average molecular weight (Mw) (Mz/Mw) from greater than 2.5 to no greater than 6, a crystallinity of at least 5%, and a viscosity of no greater than 2,500 centipoise at 190° C., and from 10% by weight to no greater than 30% by weight tackifying resin, the adhesive composition having a viscosity no greater than 10,000 centipoise at 149° C.
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