Photoprotection of Copper-Amine-Treated Pine
Keywords:<i>Pinus pinaster</i>, copper-amine, HBT, PEG, Tinuvin, CIELAB, color, antioxidant, UV absorber, UV blocker
AbstractPhenolic UV absorbers containing 2-[(2"-benzotriazinyl)-4'-hydroxy-5'-tert-butylphenyl]ethyliso-cyanate (HBTNCO) and isocyanates of monosubstituted polyethylene glycol (350) as PEGNCO, and commercial Tinuvin 1130 (T1130) and Tinuvin precursor (PT1130) were evaluated for protection of copper-amine treated maritime pine against photodiscoloration. Treated wood was irradiated with UV (ultraviolet) light from a pressure mercury lamp of 400 watts for various periods of time. The color change after irradiation was estimated by using the CIELAB system. Grafting of HBTNCO+PEGNCO to wood surfaces using microwaves provided relatively good protection against discoloration.
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