Thioxanthone ester derivatives: efficient triplet sensitizers for photopolymer applications

“…In the present work, we employed the sodium salt of thioxanthone disulfonate. The sulfonate groups only act in terms of increasing the water solubility without affecting the spectral properties significantly [59,66].…”

Section: Theoretical Background and Strategy For The Present Workmentioning

confidence: 99%

Hydrogel formation by photocrosslinking of dimethylmaleimide functionalized polyacrylamide

Seiffert

Oppermann

Saalwächter

2007

Polymer

100

View full text Add to dashboard Cite

“…On the other hand, when CBI and MDBZ which produce Lewis acids 18 upon UV irradiation were used as the catalysts, the reaction did not proceed at all. MDBZ contains a morpholino group that would be expected to interfere with cationic polymerization.…”

Section: Synthesis Of Phosphorus-containing 1-propenyl Ether Monomersmentioning

confidence: 99%

Synthesis and Photoinitiated Cationic Polymerization of Polyfunctional 1-Propenyl Ether Monomers and Polymers Containing Phosphonate Linkage in the Main Chain

Otsuka

Minegishi

Wakabayashi

et al. 2004

Polym J

View full text Add to dashboard Cite

ABSTRACT:Polyfunctional 1-propenyl ether monomers (1a-c) were synthesized by the regioselective addition reaction of 1-propenyl glycidyl ether (PGE) with certain phosphonic dichlorides using quaternary onium salts as catalysts. The reaction of PGE with phenylphosphonic dichloride (PPDC) gave bis[1-(chloromethyl)-2-(propenyloxy)-ethyl]phenylphosphonate (1a) in 82% yield. Polycondensation of 1a with terephthalic acid (TPC) was also carried out using 1, 8-diazabicyclo[5.4.0]undecene-7 (DBU) as a base to afford the corresponding polymer containing 1-propenyl ether groups (2a). A multifunctional monomer (3a) containing both 1-propenyl ether groups as Vc and methacrylate groups as Vr was prepared by the reaction of 1a with methacrylic acid (MA) using DBU. Photoinitiated cationic polymerization of these 1-propenyl ether compounds proceeded rapidly using bis[4-(diphenylsulfonio)phenyl]sulfide bis(hexafluorophoshate) (DPSP), as a cationic photoinitiator without solvent upon UV irradiation.

show abstract

“…It has been known for years [8,16] that (arene)(cyclopentadienyl)iron(II) complexes are strong UV absorbers with the spectra extending even to the visible range (i.e., typically more than 100 nm further towards longer wavelengths than iodonium salts). Therefore, photosensitization in a FP/iodonium salt system is plausible.…”

Section: Blends Of Ferrocenium and Iodonium Or Sulfonium Salts (Fp/iamentioning

confidence: 99%

“…It is known that a Brønsted acid is released during the photolysis of iodonium [6] and sulfonium [7] salts, whereas a Lewis acid is generated during the photolysis of ferrocenium salts [8]. Cationic polymerization of ECHC with five different types of photoinitiators capable of generating different acids was evaluated at various reaction temperatures using photo-DSC.…”

Section: Effect Of Initiator Typementioning

confidence: 99%

Cationic polymerization using mixed cationic photoinitiator systems

Kostanski

Kim

MacGregor

et al. 2007

Designed Monomers and Polymers

View full text Add to dashboard Cite

Abstract-Photoinitiated cationic polymerization is useful wherever the lack of oxygen inhibition, low shrinkage and formation of polymers with good adhesion properties are essential. Rates and conversions for cationic polymerizations of epoxycyclohexylmethyl-epoxycyclohexane carboxylate (ECHC) with various cationic photoinitiators and their blends were compared. Glass-transition temperatures of polymers were determined by dynamic mechanical analysis. When photopolymerizations of ECHC with initiator blends were compared with single-initiator systems, strong synergies leading to high polymerization rates and conversions were discovered for blends of diaryliodonium hexafluoroantimonate (IA) with tolylcumyliodonium tetrakis(pentafluorophenyl)borate (IB), and cumenecyclopentadienyliron(II) hexafluorophosphate with IA and IB. Mechanisms responsible for the discovered synergies are proposed.

show abstract

Thioxanthone ester derivatives: efficient triplet sensitizers for photopolymer applications

Cited by 56 publications

References 9 publications

Hydrogel formation by photocrosslinking of dimethylmaleimide functionalized polyacrylamide

Hydrogel formation by photocrosslinking of dimethylmaleimide functionalized polyacrylamide

Synthesis and Photoinitiated Cationic Polymerization of Polyfunctional 1-Propenyl Ether Monomers and Polymers Containing Phosphonate Linkage in the Main Chain

Cationic polymerization using mixed cationic photoinitiator systems

Contact Info

Product

Resources

About