Radiation-curable laminating adhesives

摘要

A radiation-curable laminating adhesive is provided which contains a) at least one urethane (meth)acrylate oligomer and b) at least one additional (meth)acrylate-functionalized component selected from the group consisting of carboxylic acid-functionalized ester-containing (meth)acrylate monomers and polybutadiene poly(meth)acrylates. The adhesive may also contain other components such as (meth)acrylic polyol (meth)acrylates. Flexible packaging laminates may be obtained by using the aforedescribed adhesive to adhere thin polymeric and/or metallic films together, the adhesive being exposed to an amount of radiation effective to cure the adhesive.

主权项

1. A radiation-curable adhesive for laminating films together to form a flexible packaging laminate,
wherein the adhesive is free of water and tackifier and is prepared from a) about 5% to about 70% by weight of adhesive of: a1) at least one aliphatic urethane acrylate oligomer and a2) a polyester-urethane acrylate oligomer different from the a1) at least one aliphatic urethane acrylate oligomer; b) about 50% to about 70% by weight of adhesive of at least one carboxylic acid-functionalized ester-containing (meth)acrylate monomer; and c) about 1% to about 25% by weight of adhesive of at least one (meth)acrylic polyol (meth)acrylate that is the reaction product of a (meth)acrylate monomer, an allylic alcohol, optionally an alkoxylated allylic alcohol and optionally an ethylenic monomer, the (meth)acrylic polyol (meth)acrylate having a Mw greater than 4000 and an average functionality of about 2 to about 8 hydroxy groups per molecule.