2023
DOI: 10.1021/acsapm.3c00191
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Evaluation of Sulfonium Borate Initiators for Cationic Photopolymerization and Their Application in Hot Lithography

Abstract: Sulfonium hexafluorophosphates and perfluorinated tetraphenylborates are well established initiators in the field of cationic photopolymerization and have already been applied in 3D-printing at elevated temperatures, named hot lithography. The cyanide-ligated borane-based photoinitiator B2 shows lower molecular weight compared to state-of-the-art borates and is less expensive to synthesize from commercial starting materials. By comparing reactivity in the epoxy monomer BADGE, B2 outperforms commercial initiato… Show more

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Cited by 3 publications
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“…By using anions such as 2,2-difluoro-2-sulfoethyl tricyclo [3.3.1.13,7]decane-1-carboxylate or 1,1,2,2,3,3,4,4,4-nonafluoro-1-butanesulfonate anions, hydrophobic sulfonium salts could be prepared [161]. Sulfonium salts bearing perfluorinated tetraphenylborates were also designed as photoinitiators for 3D printing experiments performed at high temperatures which are also named hot lithography [162]. The general initiation mechanism proposed for the cationic polymerization (CP) of epoxides upon irradiation is depicted in Scheme 2 [154,[163][164][165].…”
Section: Introductionmentioning
confidence: 99%
“…By using anions such as 2,2-difluoro-2-sulfoethyl tricyclo [3.3.1.13,7]decane-1-carboxylate or 1,1,2,2,3,3,4,4,4-nonafluoro-1-butanesulfonate anions, hydrophobic sulfonium salts could be prepared [161]. Sulfonium salts bearing perfluorinated tetraphenylborates were also designed as photoinitiators for 3D printing experiments performed at high temperatures which are also named hot lithography [162]. The general initiation mechanism proposed for the cationic polymerization (CP) of epoxides upon irradiation is depicted in Scheme 2 [154,[163][164][165].…”
Section: Introductionmentioning
confidence: 99%