SYNOPSISTen different formulations are prepared with a urethane acrylate oligomer in combination with two monofunctional monomers (EHA with low TB and NVP with a carboamide group) and a difunctional acrylate monomer (TPGDA) in the presence of a plasticizer. Polymer films are prepared with these formulated solutions under UV radiation. Their properties (gel, hardness, tensile characters, etc.) are determined. These solutions are coated on leather substrates and cured under UV radiation. The improvement of quality of leather is manifested through the enhancement of tensile strength and elongation of the coated leather. The coating also imparts high gloss on the leather surface as well as high wear resistance. It also protects the leather from the damage of weathering effect. The best formulation is determined to be the one containing NVP with a carboamide group and a plasticizer. 0
Several UV-curable formulations containing epoxydiacrylate (EB-600) oligomer with a tri-functional monomer, trimethylol propane triacrylate (TMPTA), and photoinitiator Irgcure-369 were developed to improve the surface of Partex. Filler or extender CaCO 3 was incorporated into the solution. Thin polymer films were prepared on glass plate with these formulated solutions and finally applied on polished Partex surface, and both were cured under UV-radiation. The properties of UV-cured thin films were studied as a function of CaCO 3 concentration. Pendulum hardness and gel content were found to decrease on glass plate with the increase of CaCO 3 concentration. Pendulum hardness, scratch hardness, and abrasion resistance of the cured Partex were found to be higher with the increase of CaCO 3 content up to 4%. Thus, the formulation containing 4% CaCO 3 showed the best performance over all formulations containing CaCO 3 .
SYNOPSISTwelve different formulations were developed with urethane acrylate oligomer in combination with a number of functional monomers in the presence of different additives, fillers, and plasticizers. Hessian cloth (jute product) was coated with these formulated solutions and cured under UV radiation. Enhancement of tensile strength and elongation was determined. Loss of these properties due to simulating weathering was also measured. The treated Hessian cloths were buried in soil, water, and mud for a long period and it was found that the samples put in mud were completely degradable while those treated in water and soil retained their tensile properties.
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