An adhesive article including: a coextruded polymeric backing that includes: a first layer including an amorphous polyamide, the first layer having first and second opposing major surfaces; and a second layer including a polar-modified polyolefin, the second layer having first and second opposing major surfaces; wherein the first major surface of the second layer is in contact with the second major surface of the first layer; and an acrylic pressure sensitive adhesive layer in contact with the first major surface of the first layer of the backing.

Films including solvent barriers and primer layers are described. In particular, films including a substrate, the substrate including polylactic acid, a primer layer disposed on the substrate, a barrier layer disposed on the surface of the primer layer opposite the substrate, and an adhesive layer disposed on a surface of the barrier layer opposite the primer layer. The barrier layer includes an amorphous aliphatic polyamide with a glass transition temperature of at least 40 #C. Such films can provide acceptable adhesion and barrier performance to polylactic acid based graphics film systems.

Barrier adhesive compositions include at least one polyisobutylene-containing polymer and a copolymeric additive that is a polyisobutylene-polysiloxane copolymer. The polyisobutylene-polysiloxane copolymers are prepared by the reaction of a hydridosilane-functional polysiloxane and an ethylenically unsaturated polyisobutylene oligomer. Barrier film articles include the barrier adhesive compositions and a film. The barrier film articles can be used to encapsulate organic electronic devices.

An adhesive film can include a barrier layer and an adhesive layer. In an embodiment, the barrier layer can have a melting temperature of at least 230 C. and the adhesive layer having a melting temperature of no greater than 200 C. In an embodiment, an article can include the adhesive film bonded to a substrate.

Separating film, comprising at least one layer(s) having a foamed structure of at least one thermoplastic polymer, at least one of the surfaces of the separating film being provided with a release layer (b) of at least one cured polysiloxane as an outer layer, the use thereof as a detachable protective and covering film, and roofing membrane provided with the separating film as a detachable protective and covering film.

Films including solvent barriers and primer layers are described. In particular, films including a substrate, the substrate including polylactic acid, a primer layer disposed on the substrate, a barrier layer disposed on the surface of the primer layer opposite the substrate, and an adhesive layer disposed on a surface of the barrier layer opposite the primer layer. The barrier layer includes an amorphous aliphatic polyamide with a glass transition temperature of at least 40 #C. Such films can provide acceptable adhesion and barrier performance to polylactic acid based graphics film systems.