Hot melt adhesive compositions that include semi-crystalline propylene polymer and wax and articles including the same
A hot melt adhesive composition that includes at least 40% by weight of an unmodified, semi-crystalline propylene polymer that includes at least 50% by weight propylene, and at least 15% by weight wax.
1. A hot melt adhesive composition comprising:
at least 40% by weight of an unmodified, semi-crystalline propylene polymer comprising at least 50% by weight propylene;
at least 15% by weight non-functionalized wax selected from the group consisting of polyethylene wax, Fischer Tropsch wax, and combinations thereof;
from 0% by weight to no greater than 10% by weight functionalized wax; and
from 1% by weight to 10% by weight elastomeric block copolymer comprising styrene.
2. The hot melt adhesive composition of claim 1 wherein the elastomeric block copolymer is selected from the group consisting of styrene-ethylene/butylene-styrene block copolymer, styrene-ethylene/propylene-styrene block copolymer, and combinations thereof.
3. The hot melt adhesive composition of claim 1 comprising at least 45% by weight of the unmodified, semi-crystalline propylene polymer.
4. The hot melt adhesive composition of claim 1 comprising at least 50% by weight of the unmodified, semi-crystalline propylene polymer.
5. The hot melt adhesive composition of claim 1 comprising at least 55% by weight of the unmodified, semi-crystalline propylene polymer.
6. The hot melt adhesive composition of claim 1 , wherein the first non-functionalized wax is polyethylene wax.
7. The hot melt adhesive composition of claim 1 , wherein the first non-functionalized wax has a melting point greater than 100° C.
8. The hot melt adhesive composition of claim 7 , wherein the second non-functionalized wax has a melting point greater than 115° C.
9. The hot melt adhesive composition of claim 1 further comprising a functionalized wax.
10. The hot melt adhesive composition of claim 9 , wherein the functionalized wax comprises maleated polyethylene wax, maleated polypropylene wax, or a combination thereof.
11. The hot melt adhesive composition of claim 1 comprising greater than 20% by weight wax.
12. The hot melt adhesive composition of claim 1 , wherein the unmodified, semi-crystalline propylene polymer has a heat of fusion of from 15 J/g to no greater than 50 J/g.
13. The hot melt adhesive composition of claim 1 , wherein the composition exhibits a set time no greater than 2 seconds.
14. The hot melt adhesive composition of claim 1 , wherein the composition exhibits a heat stress resistance of greater than 60° C. and a set time no greater than 1 second.
15. The hot melt adhesive composition of claim 1 , wherein the composition exhibits a heat stress resistance of greater than 60° C., greater than 50% fiber tear at 4° C., greater than 50% fiber tear at 60° C., and a set time of no greater than 1.5 seconds.
16. The hot melt adhesive composition of claim 1 , wherein the composition exhibits a heat stress resistance of greater than 71° C., greater than 50% fiber tear at 4° C. and greater than 50% fiber tear at 71° C., and a set time of no greater than 1.5 seconds.
17. The hot melt adhesive composition of claim 1 further comprising oil, polybutene, or a combination thereof.
18. The hot melt adhesive composition of claim 1 , wherein the composition exhibits a viscosity of no greater than 2000 centipoise at 177° C.
19. The hot melt adhesive composition of claim 1 comprising:
from 45% by weight to about 70% by weight unmodified, semi-crystalline propylene polymer;
from about 20% by weight to about 35% by weight non-functionalized wax; and
from about 1% by weight to about 10% by weight functionalized wax.
20. The hot melt adhesive composition of claim 19 , comprising from 50% by weight to about 65% by weight unmodified, semi-crystalline polypropylene polymer.
21. The hot melt adhesive composition of claim 19 , wherein the unmodified, semi-crystalline propylene polymer comprises an unmodified, metallocene-catalyzed semi-crystalline propylene copolymer, an unmodified, non-metallocene heteroaryl-catalyzed, semi-crystalline propylene copolymer, or a combination thereof.
22. The hot melt adhesive composition of claim 19 , wherein the unmodified, semi-crystalline propylene polymer exhibits a viscosity of no greater than 1200 cP at 190° C.
23. The hot melt adhesive composition of claim 19 , wherein the composition exhibits a heat stress resistance of greater than 60° C., greater than 50% fiber tear at −18° C., and greater than 50% fiber tear at 60° C.
24. The hot melt adhesive composition of claim 19 , wherein the composition exhibits a viscosity of no greater than 1500 centipoise at 149° C.
25. A package comprising:
the hot melt adhesive composition of claim 1 ;
a first substrate comprising fibers; and
a second substrate comprising fibers, the second substrate bonded to the first substrate through the adhesive composition.
26. A hot melt adhesive composition comprising:
at least 40% by weight of an unmodified, semi-crystalline propylene polymer comprising at least 50% by weight propylene;
at least 15% by weight non-functionalized wax, the non-functionalized wax being selected from the group consisting of polyethylene wax, Fischer Tropsch wax, and combinations thereof, the non-functionalized wax comprising a first non-functionalized wax and a second non-functionalized wax different from the first non-functionalized wax; and
no greater than 8% by weight of an ethylene-ethylenically unsaturated ester copolymer,
the hot melt adhesive composition exhibiting a heat stress resistance of greater than 60° C. and a set time no greater than 1 second.
27. A hot melt adhesive composition comprising:
at least 40% by weight of an unmodified, semi-crystalline propylene polymer comprising at least 50% by weight propylene;
at least 15% by weight non-functionalized wax, the non-functionalized wax being selected from the group consisting of polyethylene wax, Fischer Tropsch wax, and combinations thereof, the non-functionalized wax comprising a first non-functionalized wax and a second non-functionalized wax different from the first non-functionalized wax; and
no greater than 8% by weight of an ethylene-ethylenically unsaturated ester copolymer,
the hot melt adhesive composition exhibiting a heat stress resistance of greater than 60° C., greater than 50% fiber tear at 4° C., greater than 50% fiber tear at 60° C., and a set time of no greater than 1.5 seconds.
28. A hot melt adhesive composition comprising:
at least 40% by weight of an unmodified, semi-crystalline propylene polymer comprising at least 50% by weight propylene;
at least 15% by weight non-functionalized wax, the non-functionalized wax being selected from the group consisting of polyethylene wax, Fischer Tropsch wax, and combinations thereof, the non-functionalized wax comprising a first non-functionalized wax and a second non-functionalized wax different from the first non-functionalized wax; and
no greater than 8% by weight of an ethylene-ethylenically unsaturated ester copolymer,
the hot melt adhesive composition exhibiting a heat stress resistance of greater than 71° C., greater than 50% fiber tear at 4° C. and greater than 50% fiber tear at 71° C., and a set time of no greater than 1.5 seconds.
29. A hot melt adhesive composition comprising:
from 45% by weight to about 70% by weight unmodified, semi-crystalline propylene polymer comprising at least 50% by weight propylene;
from about 20% by weight to about 35% by weight non-functionalized wax;
at least 15% by weight non-functionalized wax selected from the group consisting of polyethylene wax, Fischer Tropsch wax, and combinations thereof,
the non-functionalized wax comprising a first non-functionalized wax and a second non-functionalized wax different from the first non-functionalized wax;
from about 1% by weight to about 10% by weight functionalized wax; and
no greater than 8% by weight of an ethylene-ethylenically unsaturated ester copolymer,
the composition exhibiting a heat stress resistance of greater than 60° C., greater than 50% fiber tear at −18° C., and greater than 50% fiber tear at 60° C.
30. A hot melt adhesive composition comprising:
from 45% by weight to about 70% by weight unmodified, semi-crystalline propylene polymer comprising at least 50% by weight propylene;
from about 20% by weight to about 35% by weight non-functionalized wax;
at least 15% by weight non-functionalized wax selected from the group consisting of polyethylene wax, Fischer Tropsch wax, and combinations thereof,
the non-functionalized wax comprising a first non-functionalized wax and a second non-functionalized wax different from the first non-functionalized wax;
from about 1% by weight to about 10% by weight functionalized wax; and
no greater than 8% by weight of an ethylene-ethylenically unsaturated ester copolymer,
the hot melt adhesive composition exhibiting a viscosity of no greater than 1500 centipoise at 149° C.
31. A hot melt adhesive composition comprising:
at least 40% by weight of an unmodified, semi-crystalline propylene polymer comprising at least 50% by weight propylene;
at least 15% by weight non-functionalized wax, the non-functionalized wax being selected from the group consisting of polyethylene wax, Fischer Tropsch wax, and combinations thereof, the non-functionalized wax comprising a first non-functionalized wax and a second non-functionalized wax different from the first non-functionalized wax;
no greater than 8% by weight of an ethylene-ethylenically unsaturated ester copolymer; and
an elastomeric block copolymer selected from the group consisting of styrene-ethylene/butylene-styrene block copolymer, styrene-ethylene/propylene-styrene block copolymer, and combinations thereof,
the hot melt adhesive composition exhibiting a set time no greater than 1 second.