Both sides coated automotive paint compatible liner for structural adhesive film
Assignee3M Innovative Properties Company
InventorsStefan B. M. Luebbe, Elisabeth Cura, Kanta Kumar, Michael A. Semonick
Life of this patent
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Abstract
An adhesive film liner comprising (a) a polymeric layer having a first and a second surface, the second surface being opposed to the first surface; (b) a first release layer located on top of the first surface of the polymeric layer, the first release layer comprising at least one polyurethane acrylate oligomer and/or at least one polyurethane methacrylate oligomer; and (c) a second release layer located on top of the second surface layer of the polymeric layer, the second release layer comprising at least one acrylate polymer.
Claims15
A liner for an adhesive film, the liner comprising:
- (a) a polymeric layer having a first and a second surface, the second surface being opposed to the first surface;
- (b) a first release layer located on top of the first surface of the polymeric layer, the first release layer being obtained from a composition consisting essentially of:
- (b1) at least one difunctional aliphatic urethane acrylate;
- (b2) at least one monoacrylate or at least one monomethacrylate;
- and
- (b3) at least one diacrylate and/or at least one triacrylate, or at least one dimethacrylate and/or at least one trimethacrylate;
- and
- (b4) optionally a photoinitiator;
- and
- (c) a second release layer located on top of the second surface layer of the polymeric layer, the second release layer comprising a copolymer of at least a first alkyl (meth)acrylate monomer and at least one second alkyl (meth)acrylate monomer,
- wherein the first alkyl (meth)acrylate monomer is a (meth)acrylate having C12-30 alkyl group and wherein the second alkyl (meth)acrylate monomer is a (meth)acrylate having a C1-12 alkyl group,
- wherein the first release layer is a homogeneous layer, and
- wherein the first release layer exhibits a higher peel force than the second release layer.
Dependencies are inferred from the claim text.