RAPID COMMUNICATION: Application of novel unsaturated organosilane ethers in cationic
UV-crosslinkable acrylic PSA systems (in English)
Polimery 2004, No 11-12, 837
This paper describes application possibilities of applying novel unsaturated - allyl and 1-propenyl butane-1,4-diol derivatives containing a trimethylsilane group [TMSAlE and DMSAlE, respectively] or a dimethylsilane group (TMSPnE and DMSPnE] as cationic-crosslinking, reactive in result of UV radiation activity monomers in polyacrylate systems containing oxirane groups. Terpolymerization of 2-ethylhexyl acrylate with acrylic acid and glycidyl acrylate or metacrylate (GA and GMA, respectively) led to formation of pressure-sensitive adhesives (PSAs). Compositions containing such polyacrylates, unsaturated organosilane ethers (OE) and a Irgacure 261 as a were crosslinked at ambient temperature using a UV lamp. Adhesion to glass and cohesion of unmodified self-adhesives, as well as effect of OE on those properties were investigated. The best cohesion and adhesion levels for PSAs were achieved at approx. 3 wt. % of propenyl ethers (TMSPnE and DMSPnE). Those ethers also exhibited better crosslinking properties than TMSAlE and DMSAlE.
Keywords: pressure-sensitive adhesives, cationic initiated UV-crosslinking, modification, unsaturated organosilane ethers, adhesion to glass, cohesion
Application of novel unsaturated organosilane ethers in cationic UV-crosslinkable acrylic PSA systems (in English)