Hot melt adhesive compositions including non-single she catalyzed amorphous poly alpha-olefin polymer, and articles including the same
The invention features hot melt adhesive compositions including from 50% by weight to 95% by weight of a non-single site catalyzed amorphous poly alpha-olefin copolymer derived from propylene and at least one monomer selected from the group consisting of butene and hexene and having a viscosity of no greater 10,000 cP at 190° C. and from 5% by weight to 45% by weight of a polybutene-1 polymer.
1. A hot melt adhesive composition comprising:
a. from 50% by weight to 95% by weight of a non-single site catalyzed amorphous poly alpha-olefin copolymer derived from propylene and at least one monomer selected from the group consisting of butene and hexene and having a viscosity of no greater 10,000 cP at 190° C.; and
b. from 5% by weight to 45% by weight of a polybutene-1 polymer, wherein the hot melt adhesive composition comprises no greater than 10% by weight of an oil.
2. The hot melt adhesive composition of claim 1 wherein the hot melt adhesive composition comprises no greater than 10% by weight of a liquid plasticizer.
3. The hot melt adhesive composition of claim 1 wherein the hot melt adhesive composition is free of tackifying agent.
4. The hot melt adhesive composition of claim 1 comprising from 5% by weight to 25% by weight of a tackifying agent.
5. The hot melt adhesive composition of claim 1 wherein components a.) and b.) comprise at least 90% by weight of the composition.
6. The hot melt adhesive composition of claim 1 wherein components a.) and b.) comprise at least 95% by weight of the composition.
7. The hot melt adhesive composition of claim 1 wherein the hot melt adhesive composition comprises no greater than 10% by weight of a wax.
8. The hot melt adhesive composition of claim 1 wherein the non-single site catalyzed amorphous poly alpha-olefin copolymer is derived from butene and propylene.
9. The hot melt adhesive composition of claim 1 wherein the non-single site catalyzed amorphous poly alpha-olefin copolymer has a viscosity of no greater 5,000 cP at 190° C.
10. The hot melt adhesive composition of claim 1 comprising from 60% by weight to 90% by weight of the non-single site catalyzed amorphous poly alpha-olefin copolymer.
11. The hot melt adhesive composition of claim 1 wherein the polybutene-1 polymer is single-site catalyzed.
12. The hot melt adhesive composition of claim 1 wherein the polybutene-1 polymer has a density of greater than 0.89.
13. The hot melt adhesive composition of claim 1 wherein the polybutene-1 polymer is a copolymer of polybutene-1 and ethylene.
14. The hot melt adhesive composition of claim 1 wherein the polybutene-1 polymer has a viscosity of 3000 cP to 50,000 cP at 190° C.
15. The hot melt adhesive composition of claim 1 comprising from 5% by weight to 40% by weight of the polybutene-1 polymer.
16. The hot melt adhesive composition of claim 1 further comprising from 1% by weight to 7% by weight of a wax selected from a group consisting of Fischer-Tropsch wax and polyethylene wax or a combination thereof.
17. The hot melt adhesive composition of claim 1 having an Initial Static Peel of from 10 min to 100 min.
18. A disposable absorbent article comprising:
a.) a body fluid impermeable back sheet,
b.) a nonwoven top sheet, and
c.) the hot melt adhesive composition of claim 1 , wherein the body fluid impermeable back sheet is adhered to the nonwoven top sheet through the hot melt adhesive composition.
19. A hot melt adhesive composition comprising:
a. from 50% by weight to 95% by weight of a non-single site catalyzed amorphous poly alpha-olefin copolymer derived from propylene and at least one monomer selected from the group consisting of butene and hexene and having a viscosity of no greater 10,000 cP at 190° C.; and
b. from 5% by weight to 25% by weight of a polybutene-1 polymer, wherein the hot melt adhesive composition is free of liquid plasticizer.