Preparation And Application Of Functional UV Curing Resin

Research and application of functional resin has been used to improve UV curable product performance and adjust to actual needs of various basic work with continuous application expansion of UV coatings, inks and adhesives. UV silicone shows excellent thermal stability and weather resistance, and also possesses excellent electrical insulation and chemical resistance. Hyperbranched polyester have the connectivity of multiple active end groups, high solid content low viscosity, no bands entangled and easy dissolved. By changing the materials and designing structural, it is possible to prepare UV resin with high performance.In this thesis,guided by the structure and composition design,based on chemical reactions, we prepared two types of unique performance UV curing resin, then used its composition as a sample, tested their major coating performance.This subject is composed of the following two parts:Part one:UV-curable silicone resin prepolymer was prepared by the transesterification method,with methoxymethyl-phenyl silicone resin and hydroxyethyl acrylate as raw materials.Then its light curing coating performance was evaluated.The results showed that, the optimal conditions for the transesterification reaction:0.3wt%of catalyst (the mixture of stannous octoate and aluminum acetylacetonate,1:1), and the hydroxyl and methoxy mole ratio is1.2, reaction temperature is100℃reaction time is6h.UV-curable silicone resin prepared in this condition has good storage stability,it can be stable more then28days,at60℃, which is equivalent to storage at room temperature sealed for90days.Coating test results show that the addition of silicone resin, the flexibility and adhesion of the film was obviously improved, but the hardness of the film was reducing instead with the increase of it. When added in an amount of20%, the film performance best.Part two:Used caprolactone, TMP, DMPA and AA as raw materials to synthesize UV-curable hyperbranched polycaprolactone acrylate (HBPEA). The results showed that, the optimum conditions for the synthesis of PCLs:0.2wt%stannous octoate as catalyst, caprolactone and hydroxyl mole ratio is3.6:1, the reaction temperature is140℃, reaction time is6h; The optimum reaction temperature to synthesis HBPEs is150℃, reaction time is8h; The optimum temperature to synthesis HBPEA is110℃, reaction time is8h.1HNMR and GPC analysis showed that, the branching degree of HBPE-2is0.4～0.5and the molecular weight distribution coefficient of HBPEs is 1.70～1.90. Which increases from1.82to1.9,after AA terminal groups modification. Coating test show that, HBPEA can obviously improve flexibility, adhesion and impact resistance of the film, but the hardness decreased instead. When added in an amount of30%, the hardness of film is2H,the adhesion is5B, the flexibility is1mm, the impact resistance is30cm, the film has best comprehensive performance.