초록 ▼

Disclosed is a method of making a laminate that includes a) preparing an adhesive composition, where the preparing includes combining a first part that includes (meth)acrylate functional, polyisocyanate prepolymer, and polyisocyanate monomer, the first part including at least 10% by weight isocyanat

Disclosed is a method of making a laminate that includes a) preparing an adhesive composition, where the preparing includes combining a first part that includes (meth)acrylate functional, polyisocyanate prepolymer, and polyisocyanate monomer, the first part including at least 10% by weight isocyanate functional groups, and a second part that includes polyol, at least one of the first part and the second part includes photoinitiator, b) coating a first flexible substrate with the adhesive composition, c) exposing the adhesive composition to radiation to partially cure the adhesive composition, and d) contacting the adhesive composition with a second flexible substrate.

대표청구항 ▼

What is claimed is: 1. A method of making a laminate, said method comprising: a) preparing an adhesive composition, said preparing comprising combining a first part comprising (meth)acrylate functional, polyisocyanate prepolymer, and polyisocyanate monomer, said first part comprising at least 10% b

What is claimed is: 1. A method of making a laminate, said method comprising: a) preparing an adhesive composition, said preparing comprising combining a first part comprising (meth)acrylate functional, polyisocyanate prepolymer, and polyisocyanate monomer, said first part comprising at least 10% by weight isocyanate functional groups, a second part comprising polyol, and optionally, a third part, at least one of said first part, said second part and said optional third part comprising photoinitiator; b) coating a first flexible substrate with said adhesive composition; c) exposing the adhesive composition to radiation to partially cure said adhesive composition; and d) contacting said adhesive composition with a second flexible substrate. 2. The method of claim 1, wherein said first part comprises at least 15% by weight said polyisocyanate monomer. 3. The method of claim 1, wherein said first part comprises at least 30% by weight said polyisocyanate monomer. 4. The method of claim 1, wherein said exposing occurs prior to contacting said adhesive composition with said second flexible substrate. 5. The method of claim 1, wherein said exposing occurs after contacting said adhesive composition with said second flexible substrate. 6. The method of claim 1, wherein said adhesive composition exhibits a viscosity of from 250 centipoise to 5000 centipoise at a temperature from 65�� F. to 170�� F. 7. The method of claim 1, wherein said coating comprises coating said adhesive composition at a coating weight of from 0.5 pounds per 3000 square feet to 4 pounds per 3000 square feet. 8. The method of claim 1, wherein said adhesive composition exhibits a lap shear strength of at least 25 g/in2 after exposure to said radiation. 9. The method of claim 1, wherein said adhesive composition exhibits a lap shear strength of at least 100 g/in2 after exposure to said radiation. 10. The method of claim 1, wherein said adhesive composition comprises from 5% by weight to 70% by weight said (meth)acrylate functional, polyisocyanate prepolymer; at least 7% by weight said polyisocyanate monomer; from 30% by weight to 95% by weight said polyol; and from 0.2% by weight to 10% by weight said photoinitiator. 11. The method of claim 1, wherein said first part of said adhesive composition comprises from 40% by weight to 90% by weight said (meth)acrylate functional, polyisocyanate prepolymer, and from 10% by weight to 60% by weight said polyisocyanate monomer. 12. The method of claim 1, wherein said first part of said adhesive composition comprises from 10% by weight to about 20% by weight isocyanate functional groups. 13. The method of claim 1, wherein said first part comprises from about 0.5% by weight to about 20% by weight radiation polymerizable groups. 14. The method of claim 1, wherein said first part comprises from about 1% by weight to about 10% by weight radiation polymerizable groups. 15. The method of claim 1, wherein the first part and the second part are combined in amounts such that the stoichiometric ratio of isocyanate (NCO) to hydroxyl group (OH) (NCO:OH) is from about 1:1 to about 2:1. 16. The method of claim 1, wherein said (meth)acrylate polyisocyanate prepolymer comprises the reaction product of a) an isocyanate polyurethane prepolymer comprising the reaction product of i) polyol and ii) isocyanate; and b) hydroxy functional (meth)acrylate. 17. The method of claim 16, wherein said hydroxy functional acrylate comprises hydroxyalkyl(meth)acrylate. 18. The method of claim 16, wherein said hydroxy functional acrylate comprises hydroxyethyl acrylate. 19. The method of claim 1, wherein said polyol comprises polyester polyol, polyether polyol, or a mixture thereof. 20. The method of claim 1, wherein said polyol has a functionality of at least 2. 21. The method of claim 1, wherein said polyol has a functionality of no greater than 3. 22. The method of claim 1, wherein said adhesive composition comprises from 20% by weight to 95% by weight said polyol. 23. The method of claim 1, wherein said adhesive composition comprises from 30% by weight to 70% by weight said polyol. 24. The method of claim 1, wherein said adhesive composition comprises from 30% by weight to 70% by weight said (meth)acrylate functional, polyisocyanate prepolymer. 25. The method of claim 1, wherein said adhesive composition comprises from 20% by weight to 60% by weight said (meth)acrylate functional, polyisocyanate prepolymer. 26. The method of claim 1, wherein said photoinitiator is selected from the group consisting of dialkoxy acetophenones, hydroxyalkyl phenyl ketones, benzoin ethers, benzoin acetals, acyl phosphine oxides, and combinations thereof. 27. The method of claim 1, wherein said photoinitiator comprises a hydroxyl functional photoinitiator. 28. The method of claim 1, wherein at least one of said first and second flexible substrates is a polymer film. 29. The method of claim 1, wherein at least one of said first and second flexible substrates is a metallized polymer film. 30. The method of claim 1, wherein at least one of said first flexible substrate and said second flexible substrate comprises polyethylene terephthalate, polypropylene, polyethylene, metallized polypropylene, metalized polyethylene terephthalate, Nylon, and metal foil. 31. A method of making a laminate, said method comprising: a) coating a first flexible substrate with a composition comprising (meth)acrylate functional, polyisocyanate prepolymer, at least 7% by weight polyisocyanate monomer, polyol, and photoinitiator; b) exposing said adhesive composition to radiation to partially cure said adhesive composition; and c) contacting said adhesive composition with a second flexible substrate. 32. A method of making a laminate, said method comprising: a) preparing an adhesive composition, said preparing comprising combining a first part comprising (meth)acrylate functional, polyisocyanate prepolymer, and at least 15% by weight polyisocyanate monomer, a second part comprising polyol, and optionally, a third part, at least one of said first part, said second part and said optional third part comprising photoinitiator; b) coating a first flexible substrate with said adhesive composition c) exposing said composition to radiation to partially cure said composition; and d) contacting said adhesive composition with a second flexible substrate. 33. A method of making a laminate, said method comprising: a) preparing an adhesive composition, said preparing comprising combining (meth)acrylate functional, polyisocyanate prepolymer, polyisocyanate monomer, the combination of said prepolymer and said monomer comprising at least 10% by weight isocyanate functional groups based on the combined weight of said prepolymer and said polyisocyanate monomer, polyol, and photoinitiator; b) coating a first flexible substrate with said adhesive composition; c) exposing the adhesive composition to radiation to partially cure said adhesive composition; and d) contacting said adhesive composition with a second flexible substrate. 34. A laminate comprising: an adhesive composition comprising the reaction product of (meth)acrylate functional, polyisocyanate prepolymer, polyisocyanate monomer, the combination of said prepolymer and said monomer comprising at least 10% by weight isocyanate functional groups based on the combined weight of said prepolymer and said polyisocyanate monomer, polyol, and photoinitiator; a first flexible substrate; and a second flexible substrate, said first flexible substrate being bonded to said flexible substrate through said adhesive composition. 35. A laminate comprising: an adhesive composition comprising the reaction product of a (meth)acrylate functional, polyisocyanate prepolymer, polyisocyanate monomer, polyol, and photoinitiator, a first flexible substrate; and a second flexible substrate, said first flexible substrate being bonded to said second flexible substrate through said adhesive composition, said adhesive composition exhibiting a destructive peel to at least one of said first and second substrates. 36. A package comprising: a) a food article; and b) the laminate of claim 34 at least partially surrounding said food article.