Synthesis and photopolymerization of hyperbranched polyurethane acrylates applied to UV curable flame retardant coatings

Abstract

A series of hyperbranched polyurethane acrylates containing phosphorus were prepared by reaction of a phosphorus‐containing triol with toluene‐2,4‐diisocyanate and hydroxylethyl acrylate at given ratios. The resins obtained were found to polymerize rapidly in the presence of a photofragmenting initiator under UV irradiation, and the maximum polymerization rate increased with temperature up to 125 °C, then decreased quickly. The UV cured films have flame retardancy with a limiting oxygen index of 27.0. © 2002 Society of Chemical Industry

Kinetic Evaluation of Hyperbranched A2 + B3 Polycondensation Reactions

“…Since the reactivity at the different reaction sites is usually given by the system and cannot be influenced, this observation is more directed towards understanding polycondensation reactions, where the ratio of structural units does not fit the expected scheme. It will be of special interest to compare a detailed structure analysis of the newly developed AA* þ B*B 2 systems [49][50][51][52][53] having different reaction rates of the functional groups with the predicted structure development in this theoretical work. This particular system will be discussed in a forthcoming paper.…”

UV curable EA-Si hybrid coatings prepared by combination of radical and cationic photopolymerization

“…Generally, UV curable coating consists of multifunctional monomer, reactive diluent, photoinitiator and other auxiliaries. Most of the compositions can participate in the formation of solid film, thus it is regarded as a green product with great potential for further development [2][3][4][5][6][7].…”

Thermal properties and combustion behaviors of UV‐cured phosphate triacrylate/star poly(urethane acrylate) oligomer blends

“…A series of phosphate acrylate has been reported. [8][9][10][11][12] These resins can form clear and hard films after UV irradiation in the presence of a photoinitiator. However, little work has been reported on the degradation mechanism of the intumescent UV curable resin.…”