Hot melt adhesive
View Patent ↗A hot melt adhesive based on ethylene-2-ethylhexyl acrylate copolymer finds use in packaging applications where high heat resistance, as well as good cold tolerance, is required.
1. A hot melt adhesive comprising an ethyelene-2-ethylhexyl acrylate copolymer and a maleic modified polyethylene.
2. The hot melt adhesive of claim 1 further comprising a tackifier and a wax.
3. The adhesive of claim 1 further comprising an ethylene vinyl acetate copolymer and/or an ethylene n-butyl acrylate copolymer.
4. The adhesive of claim 2 wherein the wax is a polyethylene wax.
5. The adhesive of claim 2 wherein the tackifier is a hydrogenated aliphatic hydrocarbon tackifier.
6. The adhesive of claim 2 comprising from about 5 to about 50 wt % ethylene-2-ethylhexyl acrylate copolymer, from about 5 to about 40 wt % of a wax, from about 5 to about 60 wt % of a tackifier, from about 5 to about 30 wt % of a functionalized polyethylene additive, up to about 30 wt % of an ethylene vinyl acetate copolymer, up to about 30 wt% of an ethylene n-butyl acrylate copolymer and up to about 1 wt % of an antioxidant.
7. The adhesive of claim 6 wherein the wax is a Fischer-Tropsch wax.
8. The adhesive of claim 7 comprising from about 15 to about 35 wt % of a polyethylene wax.
9. The adhesive of claim 1 comprising an ethylene-2-ethylhexyl acrylate copolymer, a maleic modified polyethylene, a hydrogenated aliphatic hydrocarbon tackifier, and a polyethylene wax.
10. The adhesive of claim 9 further comprising an ethylene vinyl acetate copolymer and/or an ethylene n-butyl acrylate copolymer.
11. The adhesive of claim 1 which comprises from about 5 to 25 wt % of said ethylene-2-ethylhexyl acrylate copolymer.
12. The adhesive of claim 11 which comprises from about 5 to 15 wt % of said ethylene-2-ethylhexyl acrylate copolymer.
13. The adhesive of claim 12 which further comprises a tackifier, a wax and an ethylene copolymer selected from the group consisting of ethylene vinyl acetate copolymers and ethylene n-butyl acrylate copolymers.
14. The adhesive of claim 1 which is applied at a temperature of from 300° F. to about 200° F.
15. The adhesive of claim 14 which is applied at a temperature of from 300° F. to about 250° F.
16. The adhesive of claim 14 which has a heat stress value of above about 150° F.
17. The adhesive of claim 14 which gives partial to full fiber tear at temperatures between about −20° F. to about 160° F.
18. The adhesive of claim 14 which further comprises an ethylene n-butyl acrylate copolymer, a tackifier and/or a wax.