Study of the polymerization of acrylic resins by photocalorimetry

Artificial ageing of wood finishes monitored by IR analysis and color measurements

“…These photoinitiators have an absorption band that extends into the visible region of the electromagnetic spectrum and thus can initiate polymerization under visible light 13, 18…”

“…These photoinitiators have an absorption band that extends into the visible region of the electromagnetic spectrum and thus can initiate polymerization under visible light. 13,18 Two different organic and inorganic UV absorbers were tested. The UV absorber Tinuvin 1130 is an organic compound based on 2-hydroxyphenyl triazole which was provided by Ciba Specialty Chemicals Inc. Inorganic absorber Rhodigard S100 was furnished by Rhodia Electronics and Catalysis as a nanodispersion of cerium oxide with a diameter of particles comprised between 5 and 100 nm.…”

“…Thus solutions have to be found to increase the durability of UV curable finishes, particularly for outdoor joinery which is submitted to severe climatic conditions. In our previous work18 we sought to develop clear photocurable formulations containing specific photoinitiators able to initiate the curing process under visible light so that UV absorbers could be incorporated into the finish. The curing process was studied by means of photocalorimetry and it was observed that the addition of UV absorbers did not inhibit the initiation phase when photopolymerization occurred at wavelengths above 400 nm 19.…”