Dry apply adhesive graphic films
An adhesive composition includes a blend of a pressure sensitive adhesive and an additive. The pressure sensitive adhesive includes a (meth)acrylate polymer. The additive includes a copolymer with a vinyl polymeric backbone that includes at least one free radically polymerizable vinyl monomer A and at least one reinforcing comonomer B, wherein B is present at 0 to about 20% by weight of the copolymer, and a pendant polysiloxane monomer grafted to the backbone. The adhesive composition may optionally be crosslinked. The adhesive composition may be applied to a film to form a graphic article. These graphic articles may be applied to a substrate without liquid application aids.
1. An article comprising a polymeric film having thereon a layer of an adhesive composition, wherein the adhesive composition comprises a blend of: a pressure sensitive adhesive comprising a (meth)acrylate polymer; and, an additive comprising a copolymer, wherein the copolymer comprises: a vinyl polymeric backbone comprising a at least one free radically polymerizable vinyl monomer A and at least one reinforcing comonomer B, wherein B is present at up to about 20% by weight of the copolymer, and a pendant polysiloxane monomer grafted to the backbone, wherein the polysiloxane monomer is present at 0.01 to 50% by weight of the copolymer, and wherein the polysiloxane monomer has a number average molecular weight of 500 to 50,000; and wherein the blend comprises greater than zero and less than 1% by weight of the polysiloxane monomer, wherein the adhesive layer has a microstructured surface.
2. The article of claim 1 , wherein the adhesive composition further comprises a crosslinker.
3. The article of claim 1 , wherein the polymeric film is translucent, retroreflective or opaque.
4. The article of claim 1 , further comprising a release liner on the adhesive layer.
5. The article of claim 1 , wherein the microstructured surface comprises an array of pyramidal projections, wherein the projections extend away from the film.
6. The article of claim 5 , wherein the projections in array have a mean pitch of 180-300 micrometers, a mean height of 10 to 25 micrometers, and sidewall slopes of 5-10°.
7. The article of claim 1 , further comprising on the adhesive layer at least one of non-tacky pegs or beads.