Pressure-sensitive adhesives photoinitiator

In the past, electron beam radiation was applied to produce PSA exclusively however, recent improvements in UV curing technology (precise UV dose control, suitable photoinitiators) permit UV to be used to produce pressure-sensitive adhesives. PSA formulations can vary in consistency from low-viscosity liquids up to solids melting at 80°C (176°F). Therefore, applications may vary from screen printing to roll coating to melt extrusion. Coat weights for most PSA materials vary from 1 to 10 g/m. ... 

A number of reviews have appeared on the function of different types of photoinitiators and their future development and applications. A number of articles have targeted interest in photosensitive polyelectrolyte diazo systems," pressure sensitive adhesives and coatings, bonding of epoxy resins, electrodeposition materials, heat transfer in thick films, ring opening metathesis and curing for microelectronics. ... 

Dimethoxy-2-phenylacetophenone photoinitiator, pressure-sensitive adhesives... 

The papers presented in the following chapters represent advances in pressure sensitive adhesives (ultraviolet light activated acrylate monomer - low Tg polyether formulations) photoinitiated cationic polymerization (light activated aryliodonium and arylsulfonium salts of lewis acids in epoxy resin formulations) polymer and formulation design criteria for radiation curable adhesives radiation curable composites (dynamic thermal analysis characterization of electron beam cured... 

Keywords Acrylates Crosslinking Dual cure Epoxides Glass laminates Interpenetrating polymer networks Isocyanates Photo initiated cationic polymerisation Photoinitiators Photopolymerisation Pressure sensitive adhesives Release coatings Structural adhesives Thiol/polyene UV radiation curing Vinyl ethers. 

FTIR spectra are also benehcial in establishing the optimum conditions for curing acrylic adhesives by exposure to UV radiation. The degree of UV polymerization of acrylic adhesives can be followed by the decay of the ethylenic ( CH=CH2) absorption band at 810 cm. Scherzer et al. studied the UV-induced crossUnking of a pressure-sensitive acrylic resin with copolymerized benzophenone groups using variable UV doses and intensities. Real time FTIR spectroscopy was also used to study the effect of various photoinitiators in accelerating the photopolymerization of acrylate resins. ... 

Chem. Descrip. Ben ldimethyl ketal with 100 ppm MEHQ CAS 2465042-8 EINECS/ELINCS 246-386-6 Uses Photoinitiator tor UV-cured adhesives (pressure sensitive, structural), coatings (metal, optical, paper, plastic, PVC floor, textile, wood), photopolymers, electronics (photoresists, conformal, encapsulants, solder maste), iniffi (flexo, gravure, litho, offset, screen)... 

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