کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
693016 889862 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A photo-curing study of a pigmented UV-curable alkyd
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
A photo-curing study of a pigmented UV-curable alkyd
چکیده انگلیسی

The photo-curing of a pigmented UV-curable tung oil alkyd system (UVTA) was investigated. The UV-curable alkyd was a Diels–Alder Adduct of trimethylolpropane trimethacrylate with a tung oil-based alkyd. A mixture of yellow iron oxide, red iron oxide, titanium dioxide and lamp black pigments were chosen to obtain an observed yellow color. The pigment mixture, UV-curable alkyd and a reactive diluent were formulated together and photo-cured via a free radical mechanism. The through and surface cure was assessed by thumb twist, blocking resistance and MEK single rub. The through cure and surface cure assessment showed that optimum cure was achieved using UV-A as a source with two photoinitiators: phenylbis(2,4,6-trimethylbenzoyl-phosphine oxide) at 2 wt% and 1-hydroxy-cyclohexyl-phenyl-ketone at 4 wt%. The effect of reactive diluent was also investigated. Ten different reactive diluents were used. After curing, pencil hardness, conical mandrel, impact resistance, cross cut adhesion and gloss were measured. In addition, dynamic mechanical thermal analysis (DMTA) was used to evaluate selected systems. The coatings tests showed that the use of long chain linear structure diluents, such as isodecyl methacrylate, provided UV-curable paint films with better impact resistance, flexibility, and adhesion over other reactive diluents.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Organic Coatings - Volume 73, Issue 4, April 2012, Pages 392–400
نویسندگان
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