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Open AccessArticle

UV-Curable Urethane Acrylate Resin from Palm Fatty Acid Distillate

Chemistry Department, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Polymers 2018, 10(12), 1374; https://doi.org/10.3390/polym10121374
Received: 15 November 2018 / Revised: 5 December 2018 / Accepted: 6 December 2018 / Published: 11 December 2018
Palm fatty acid distillate (PFAD), is a by-product of the crude palm oil refining process. It comprises mainly of free fatty acids—around 45% palmitic and 33% oleic acids—as the major components. Ultra-violet (UV) curable urethane acrylate (UA) oligomers could be synthesized from PFAD, by the following procedure. A hydroxyl terminated macromer was first prepared by reacting PFAD with a mixture of isophthalic acid, phthalic anhydride, neopentagylcol (NPG), and pentaerythritol. The macromer was then reacted with 2-hydroxylethylacrylate (2HEA) and toluene diisocynate (TDI) to generate a resin, containing acrylate side chains for UV curable application. A series of UA resins were prepared by using 15, 25, 45, 55, and 70% of PFAD, respectively. The UA resin has Mw in the range of 3,200 to 27,000. They could be cured by UV irradiation at an intensity of 225 mW/cm2. Glass transition temperature (Tg) of the cured film was measured by differential scanning calorimeter (DSC), and hardness of the film was determined by a pendulum hardness tester, according to American Society for Testing and Materials (ASTM)4366. The resins were used in a wood-coating application. All of the cured films showed good adhesion, hardness, and chemical resistance except for the one using the 70% PFAD, which did not cure properly. View Full-Text
Keywords: PFAD; urethane acrylate; crosslinking; UV curing; chemical resistance; Tg; pendulum hardness PFAD; urethane acrylate; crosslinking; UV curing; chemical resistance; Tg; pendulum hardness
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MDPI and ACS Style

Teo, K.T.; Hassan, A.; Gan, S.N. UV-Curable Urethane Acrylate Resin from Palm Fatty Acid Distillate. Polymers 2018, 10, 1374.

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