Composition and method relating to a hot melt adhesive
View Patent ↗The present invention includes compositions relating to a hot melt adhesive that includes a copolymer of butene-1, a wax, and a tackifying resin. The present invention further relates to adhesives initially exhibiting adhesion properties and subsequently non-adhesion qualities. Methods of using these adhesives are also part of the claimed invention.
1. A method of using a composition to temporarily bond two or more containers comprising:
a. providing a first container and a second container;
b. applying the composition to a first surface of the first container creating a first bonding surface; and
c. contacting the first bonding surface to the second container forming a bond;
wherein the composition initially exhibits adhesion qualities and subsequently exhibits non-adhesion qualities such that when subjected to a Coupon Test results in Fiber Tear after about 5 minutes and no Fiber Tear after about 8 hours; and wherein the composition comprises:
(a) from about 10% by weight to about 80% by weight of an isotactic copolymer of butene-1 and a member selected from the group consisting of ethylene, propylene and mixtures thereof;
(b) from about 5% by weight to about 60% by weight of a wax; and
(c) from about 5% by weight to about 70% by weight of a tackifying resin.
2. The method of claim 1 wherein the first and second container comprise paperboard.
3. The method of claim 1 wherein the composition, when subjected to a Modified Coupon Test using the first container and the second container, results in Fiber Tear after 2 minutes and no Fiber Tear after 12 hours.
4. A method according to claim 1 wherein said composition has a Loop Tack after about 12 hours of less than about 5 ounces per inch.
5. The method according to claim 1 wherein the composition has a viscosity at 350° F. of from about 40 CPS to about 1830 CPS.
6. The method according to claim 1 wherein the composition is extruded through a nozzle in step b.
7. The method according to claim 1 wherein the composition has a Set Time of from about 0.5 seconds to about 30 seconds.
8. The method according to claim 1 wherein the composition consists essentially of
(a) from about 10% by weight to about 80% by weight of an isotactic copolymer of butene-1and a member selected from the group consisting of methylene, ethylene, propylene and mixtures thereof;
(b) from about 5% by weight to about 60% by weight of a wax; and
(c) from about 5% by weight to about 70% by weight of a tackifying resin.
9. The method according to claim 1 wherein the isotactic copolymer is in an amount of from about 20% by weight to about 70% by weight.
10. The method according to claim 1 wherein the isotactic copolymer is in an amount of from about 30% by weight to about 45% by weight.
11. The method according to claim 1 wherein the wax is in an amount of from about 10% by weight to about 40% by weight.
12. The method according to claim 1 wherein the wax is chosen from paraffin wax, microcrystalline wax, synthetic wax, functionalized versions thereof, or mixtures thereof.
13. The method according to claim 1 wherein the tackifying resin is in an amount of from about 25% by weight to about 55% by weight.
14. The method according to claim 8 wherein the composition has a viscosity at 350° F. of from about 40 cps to about 1830 cps.