Importance

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Abstract

Compositions are provided including a free-radically reactive component, a photoradical generator, and either a crosslinker having a photodegradable linkage or a chemical blowing agent, an epoxy component, and a photoacid generator. Polymeric films including reaction products of the compositions are also provided. A debondable article including a polymeric film containing a crosslinker having a photodegradable linkage is further provided, as well as a method of debonding the article. Foam compositions are also provided, including foamed matrices including the reaction products of the compositions. Further, articles and foam adhesives are provided including a substrate and a composition or foam composition disposed on the substrate. A method is additionally provided, including dispensing a composition onto a substrate; subjecting the composition to light radiation having a wavelength band of 50 nanometers or less to initiate polymerization of the composition; and subjecting the composition to light and/or heat radiation, wherein the light radiation has at least one wavelength that is outside the wavelength band of the light radiation of step b) to initiate foaming of the composition. A crosslinker is further provided, including a photodegradable linkage.

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First Claim