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US 12,516,184 B2Granted
Adhesive composition
AssigneeDow Global Technologies LLC
InventorsWanfu Ma, Allan Walter McLennaghan, Jozef J.I. Van Dun
Life of this patent
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Abstract
A composition contains (A) an ethylene/a-olefin copolymer having a density from 0.855 g/cc to 0.895 g/cc and a melt viscosity, at 177° C., from 5,000 mPa-s to 50,000 mPa-s; (B) a functionalized propylene-based polymer containing from 1 wt % to 10 wt % functional groups, the functionalized propylene-based polymer having a melt viscosity, at 190° C., from greater than 10,000 mPa-s to 50,000 mPa-s and a weight average molecular weight, Mw, greater than 30,000 g/mol; (C) a tackifier; and (D) a wax.
Claims12
A composition comprising:
- (A) from 20 to 50 wt % of an ethylene/α-olefin copolymer consisting of (i) ethylene and (ii) C4-C8 α-olefin comonomer, ethylene/α-olefin copolymer having
- a density from 0.855 g/cc to 0.895 g/cc
- a melt viscosity, at 177° C., from 5,000 mPa·s to 50,000 mPa·s;
- (B) from 5 to 10 wt % of a functionalized propylene-based polymer that is a maleic anhydride-grafted propylene/α-olefin copolymer comprising from 1 wt % to 10 wt % functional groups, the functionalized propylene-based polymer having
- a melt viscosity, at 190° C., from greater than 10,000 mPa·s to 50,000 mPa·s;
- a weight average molecular weight, Mw, from 31,000 g/mol to 40,000 g/mol;
- a Mw/Mn from 2.0 to 3.0;
- a melt index from 100 g/10 min to 1000 g/10 min;
- (C) from 20 to 60 wt % of a tackifier;
- (D) from 10 to 40 wt % of a wax;
- and
- (E) from 0 wt % to 3 wt % additive, and
- (A)-(E) amount to 100 wt % of the composition, and the composition has
- a melt viscosity at 177° C. from 500 mPa·s to 2,000 mPa·s;
- and
- a fiber tear greater than 80% at a temperature range from −20° C. to 60° C.
13 more elements
A composition comprising:
- (A) from 25 to 40 wt % of an ethylene/α-olefin copolymer consisting of (i) ethylene and (ii) C4-C8 α-olefin comonomer, ethylene/α-olefin copolymer having
- a density from 0.855 g/cc to 0.895 g/cc
- a melt viscosity, at 177° C., from 5,000 mPa·s to 50,000 mPa·s;
- (B) from 5 to 10 wt % of a functionalized propylene-based polymer comprising from 1 wt % to 10 wt % functional groups, the functionalized propylene-based polymer having
- a melt viscosity, at 190° C., from greater than 10,000 mPa·s to 50,000 mPa·s;
- a weight average molecular weight, Mw, from 31,000 g/mol to 40,000 g/mol;
- a z-average molecular weight, Mz, from 50,000 g/mol to 70,000 g/mol;
- (C) from 20 to 60 wt % of a tackifier;
- (D) from 10 to 40 wt % of a wax;
- and
- (E) from 0 wt % to 3 wt % additive;
- and
- the composition has
- (i) a melt viscosity at 177° C. from 500 mPa·s to 2,000 mPa·s, and
- (ii) a fiber tear greater than 90% at a temperature range from −20° C. to 60° C.
12 more elements
Dependencies are inferred from the claim text.