2022
DOI: 10.1177/17475198221136063
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A polymerizable difunctional photoinitiator featuring a bio-based group and its photoinitiating properties

Abstract: A polymerizable difunctional photoinitiator 2-methylene-succinic acid bis-{2-[4-(2-hydroxy-2-methylpropionyl)phenoxy]ethyl} ester (IAHHMP) based on the commercial photoinitiator 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methylpropanone (HHMP) and a biorenewable itaconic acid is synthesized by esterification. The structure is confirmed by ultraviolet spectroscopy, Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy (1H NMR, 13C NMR) and thermogravimetric analysis. The photopolymeriz… Show more

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“…The monomers have different functionalities in order to control the degree of crosslinking in combination with given oligomer, while they have a lower viscosity for better processing and variable molecular structures for adapting rigidity or flexibility. The bio-based photointiators have lately been synthesized, 16,17 but they are almost unavailable at industrial scale even if they are only used for 2% to 4% in a final acrylate formulation. In parallel, several trials have been launched for the synthesis of biobased acrylic acid, 18 however, without success yet in further industrial upscaling: acrylic acid can be alternatively produced from renewable resources, either by oxidation of acrolein, which is derived from glycerol, or through direct dehydration of lactic acid and 3-hydroxypropionic acid.…”
Section: Introductionmentioning
confidence: 99%
“…The monomers have different functionalities in order to control the degree of crosslinking in combination with given oligomer, while they have a lower viscosity for better processing and variable molecular structures for adapting rigidity or flexibility. The bio-based photointiators have lately been synthesized, 16,17 but they are almost unavailable at industrial scale even if they are only used for 2% to 4% in a final acrylate formulation. In parallel, several trials have been launched for the synthesis of biobased acrylic acid, 18 however, without success yet in further industrial upscaling: acrylic acid can be alternatively produced from renewable resources, either by oxidation of acrolein, which is derived from glycerol, or through direct dehydration of lactic acid and 3-hydroxypropionic acid.…”
Section: Introductionmentioning
confidence: 99%