UV curing water-based hyperbranched polyurethane acrylic ester and preparation method thereof

Abstract

The invention discloses UV curing water-based hyperbranched polyurethane acrylic ester and a preparation method thereof. The preparation method comprises the following steps: mixing diisocyanate and dihydric alcohol into an aprotic solvent, performing reaction to obtain an intermediate, adding a single amino polyhydroxyl monomer to obtain a 'core'; performing reaction on the diisocyanate and the single amino polyhydroxyl monomer in the aprotic solvent to obtain an AB2 monomer, performing mixed reaction on the AB2 monomer and the 'core' to obtain hyperbranched polyurethane; adding the hyperbranched polyurethane into maleic anhydride to perform terminal group modification, performing reaction on hydroxyl-containing acrylic ester and diisocyanate to generator a monomer, and adding a catalyst;mixing the products of the above reaction and adding a catalyst; and adding a neutralizing agent, reacting, separating and drying to obtain white powdered UV curing water-based hyperbranched polyurethane acrylic ester. The UV curing water-based hyperbranched polyurethane acrylic ester can be dispersed into an aqueous phase and can be rapidly cured after UV illumination.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a UV-curable water-based hyperbranched polyurethane acrylate and a preparation method thereof. Background technique [0002] As early as 1952, Flory theoretically proposed that ABn(n>2) monomers form highly branched polymers through self-condensation, but they did not receive much attention in the following decades. Until the 1980s, Kim et al. of DuPont synthesized a hyperbranched polymer, and applied for the first patent (U.S.Pat.4857630, 1987.) on this direction of science, and at the same time in the United States in 1988 The results were announced at the National Chemistry Conference held in Los Angeles. Since then, hyperbranched polymers have entered the field of vision of scientists from all over the world. Their special structures and properties have attracted great interest from scholars from all over the world and become a research hotspot. [0003] Compared with den...

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Problems solved by technology

Chinese patent CN1791621 (2006) reacts with acrylate hydroxyl ester and monoaminodihydroxyl to generate AB2 or A2B monomer, and then synthesizes hyperbranched polyurethane with these monomers. These resins do not contain hydrophilic groups, cannot be dispersed into water, and are hard High segment content, poor flexibility

Chinese patent CN1996544 (2007) reacts with oligomer diol to generate A2 type macromolecular monomer, and then synthesizes hyperbranched polyurethane with bB2 type monomer, thereby increasing the content of soft segment wherein, flexibility increases, but cannot be dispersed in in the water

Chinese patent CN101440150 (2009) generates hydrophilic monomer A2 by reacting diisocyanate with carboxyl-containing diol, and then synthesizes hydrophilic hyperbranched polyurethane with bB2 type monomer, but this type of resin is still poor in flexibility

Chinese patent CN101445697 (2009) reacts diisocyanate, dibasic alcohols and hydroxyl diols to synthesize linear polyurethane prepolymers, and then reacts linear polyurethane prepolymers with hydroxyl-terminated hyperbranched polymers to obtain hyperbranched polyurethanes, but still cannot achieve dispersion in water requirements

Chinese patent CN102030884A (2010) utilizes diisocyanate-hydroxyethyl methacrylate monomer to modify hyperbranched polyester to prepare hyperbranched polyurethane acrylate; Chinese patent CN102234268A (2011) uses self-made diisocyanate-hydroxypropyl acrylate monomer Modify the hyperbranched polyester obtained by reacting trimethylolpropane and phthalic anhydride to prepare hyperbranched polyurethane acrylate; Chinese patent CN1382739 utilizes diisocyanate and diethanolamine to prepare hyperbranched polyurethane, and then uses diisocyanate- It is modified by hydroxyethyl acrylate monomer, but the hyperbranched urethane acrylate hard segment content prepared by these methods is too high, the flexibility is poor, and it cannot be dispersed in the water phase

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