OBC Based Packaging Adhesive
First Claim
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1. ) A hot melt adhesive composition comprising:
- a) about 20 to 70 percent by weight of a polyolefin polymer having a melt index of greater than about 5 g/10 minutes using ASTM 1238 at 190°
C. with a 2.16 kg weight;
b) about 2 to 50 percent by weight of an olefin block copolymer with a density of from about 0.86 g/cc to about 0.89 glee;
c) about 10 to 60 percent by weight of a tackifying resin with a softening point of from about 95°
to about 140°
C.; and
d) about 0.1 to about 5 percent by weight of an antioxidant;
and wherein the adhesive composition has a Brookfield viscosity equal to or less than about 50,000 centipoise at 177°
C.
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Abstract
A hot melt adhesive formulation utilizing a blend of polymers which include a polyolefin polymer and an olefinic block copolymer (OBC). The hot melt formulations demonstrate improved hot tack, adhesion, and bond line flexibility over other traditional hot melt adhesives.
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Citations
24 Claims
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1. ) A hot melt adhesive composition comprising:
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a) about 20 to 70 percent by weight of a polyolefin polymer having a melt index of greater than about 5 g/10 minutes using ASTM 1238 at 190°
C. with a 2.16 kg weight;b) about 2 to 50 percent by weight of an olefin block copolymer with a density of from about 0.86 g/cc to about 0.89 glee; c) about 10 to 60 percent by weight of a tackifying resin with a softening point of from about 95°
to about 140°
C.; andd) about 0.1 to about 5 percent by weight of an antioxidant; and wherein the adhesive composition has a Brookfield viscosity equal to or less than about 50,000 centipoise at 177°
C.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification