SELF-ADHESIVE TAPE AND ARTICLES MADE THEREFROM Russian patent published in 2017 - IPC C09J7/02 C09J133/08 B32B37/12 B41C1/00 

FIELD: chemistry.

SUBSTANCE: group of inventions related to self-adhesive tapes for mounting flexographic printing plates, and to tools made using these tapes and the methods for mounting and demounting printing plates using these tapes. Self-adhesive tapes have a foamy substrate and two adhesive layers on each side of the substrate, where the adhesive material contains a polymer component. Polymer component is a product of free-radical polymerization reaction between the following monomers: a) linear or branched acrylic esters containing at least 2 aliphatic radical C atoms, 50% or higher mass fraction; b) linear, cyclic or branched acrylic esters containing 1 to 20 aliphatic radical C atoms, 22.5 to 46.5% mass fraction; and c) from 3.5 to 27.5% mass fraction of high polar vinyl-substituted monomers. Glass transition temperature of the polymer component between minus 22°C and minus 7°C according to the Fox method and based on measurement of the homopolymers of the monomers in (a), (b) and (c) by modulated DSC. The polymer component has a solubility parameter between 9.58 (cal/cm³)^1/2 and 99.9 (cal/cm³)^1/2 according to the Fedors method. In a preferred embodiment, the linear or branched acrylic esters in (a) are selected from at least one of isooctyl acrylate, 2-ethylhexyl acrylate, n-butyl acrylate, ethyl acrylate, and combinations thereof; wherein the linear or branched acrylic esters in (b) are represented by isobornyl acrylate, and wherein the highly polar vinyl-substituted monomers in (c) are represented by acrylic acid. A tool comprises a printing plate, self-adhesive tape and tool base. A process for mounting printing plates comprises providing an adhesive tape, applying the second adhesive layer of the adhesive tape to a tool base, placing the mounted tool base on a printing press, and printing images.

EFFECT: invention provides printing quality using double coated low strength foam backed tapes also on ink residue contaminated plates.

17 cl, 2 dwg, 7 tbl, 14 ex