UV crosslinking of acrylate based oriented anisotropic contact adhesive composition useful for double sided adhesive strips avoiding the high cost and possible damage to the adhesive strips of electron beam irradiation

摘要

Preoriented anisotropic contact adhesive compositions based on acrylate and/or methacrylate can be oriented on crosslinking with UV radiation. A contact adhesive composition (CAC) is based on at least 50 wt.% of acrylic monomer from a group of compounds of formula (I): R1 = H or Me; and R2 = H or Me or is selected from a group of optionally branched 2-30C alkyl hydrocarbons of mean Mw = at least 200,000 g/mole. which on application to a support as a hot melt has a preferred direction, which in accordance with the D test via the back-shrinkage (sic) can be determined in a free film and is at least greater than 3% (sic), where the CAC is crosslinked by UV irradiation. An Independent claim is included for a contact adhesive composition (CAC) obtained as below.