Environment-friendly UV-curable alkyd-based non-isocyanate urethanes

Synthesis and properties of linseed oil-based waterborne non-isocyanate polyurethane coating

“…Moreover, the unsaturation and triglyceride groups of vegetable oil make it possible to be modified for PU synthesis and structure design. 20 For example, the double bonds in vegetable oil can be epoxied followed by a ring opening to obtain bio-based polyol for the preparation of conventional PU. [21][22][23] In an alternative process, vegetable oil could first be epoxied and then carbonated by CO 2 under catalysis to produce vegetable oil-based cyclic carbonate for the synthesis of NIPU.…”

To Shed Light on the UV Curable Coating Technology: Current State of the Art and Perspectives

“…Coating with superior mechanical property and crosslink density was obtained compared to those of petroleum-based precursors, but the cure time for the formulation was 45 min [90]. Further research into UV curable coatings has been performed by Soucek and coworkers, wherein modified derivatives of vegetable/seed oils like tung oil, linseed oil and soybean oil were used as alkyds, non-isocyanate polyurethanes, epoxy derivatives and reactive functional precursors, both in free radical and cationic UV polymerization [12,66,93,94]. Li and coworkers used castor oil to develop a polyurethane acrylate-based UV coating with a 40 sec cure time with the help of a mercury lamp.…”