Recent Developments

Schwalm, Reinhold

doi:10.1016/b978-044452979-4/50009-3

Cited by 71 publications

(73 citation statements)

References 22 publications

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“…Considering the effects of the alkyl chain length on an increase in Tg, the cured ink prepared from OL-A with the longer chain length shows a higher increase in Tg. The increase in Tg of the cured inks after curing is also a consequence of the HDDA monomer, the crosslink film of which has Tg at around 60 °C [31]. The Tg results emphasize the physical properties such as moderate pencil hardness, high impact resistance, and high flexibility.…”

Section: Thermal Properties Of Lactide Oligomersmentioning

confidence: 83%

Effects of the Amount and Type of Diol Ring Openers on the Properties of Oligolactide Acrylates for UV-Curable Printing Inks

2017

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This study aimed to synthesize low viscosity oligolactide acrylates for UV-curable inks from oligolactide diols. Firstly, low molecular weight oligolactide diols were prepared by ring opening reaction of L-lactide with diols. Oligolactide acrylates were then synthesized by functionalizing the oligolactide diols with acrylic acid. In this study, three diol ring openers having short and long alkyl chain length were used to investigate the effects of the amount and type of diols on the properties of the oligolactide acrylates. The obtained oligomers were characterized, and the viscosities of oligolactide acrylates were measured. Results showed that oligolactide acrylates were successfully synthesized in all cases of ring openers, as confirmed by 1H-NMR (proton nuclear magnetic resonance spectroscopy) and FTIR (Fourier transform infrared spectroscopy). An increase in the alkyl chain length of the ring openers resulted in oligomers with lower viscosity and a decrease in Tg. Following that, the obtained oligolactide acrylates were employed for the formulation of UV-curable screen printing inks and their properties were investigated. Results showed that the inks formulated from oligomers with lower molecular weight exhibited better ink flow. Additionally, all ink films cured by UV radiation were very flexible with excellent adhesion, high impact resistance, and excellent water resistance.

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Section: Thermal Properties Of Lactide Oligomersmentioning

confidence: 83%

Effects of the Amount and Type of Diol Ring Openers on the Properties of Oligolactide Acrylates for UV-Curable Printing Inks

2017

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“…Our research group has focused on developing a platform of polymer building blocks derived from soybean oil for coatings and related applications (7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19). Polymeric and oligomeric materials used for UV-cure systems must meet stringent requirements of functionality, reactivity, viscosity, thermo-mechanical properties of their films, and cost for their successful deployment as film formers (20). In the present study we have designed, developed, and demonstrated application of some novel soy-based oligomers and reactive diluents as alternative sustainable materials for UV-cure systems.…”

Section: Introductionmentioning

confidence: 98%

Soy-Based Building Blocks for Advanced Photocure Coating Systems

Mannari

Patel

et al. 2015

ACS Symposium Series

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Phone: +1 734-487-1235.Photocuring technology is among the fastest-growing advanced coating technologies primarily due to their sustainability features, potential for enabling new products, and economy. Despite these benefits, the materials used in the current photocure systems are predominantly derived from petrochemical sources, making them unsustainable over the long term. Development of renewable resource-based alternate materials tailored for photocure applications is, therefore, critical to future sustainable development of photocure coating technology.This presentation highlights our research efforts in developing a platform of soybean oil-based value-added building blocks and demonstration of their suitability as alternative raw materials in advanced UV-curing coating compositions. A hyper-branched soy urethane acrylate (HSPU) has been developed and used as the primary component of UV-curable composition. Coatings based on HSPU with varying acrylate content (using reactive diluent) and high bio-based content have been characterized and compared. Due to hyperbranched structure and large free volume in their inherent structure, they exhibited interesting properties for many potential industrial applications. Another group of soy-based derivatives-low viscosity and high-functionality acrylate monomers-have been designed and used as reactive diluent in UV-cure formulation. The study demonstrates potential of these low odor and bio-based reactive diluents as partial or full replacement of conventional reactive diluents.

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“…1,2 Photoinitiators that are applied in a small percentage in formulations play a key role in UV curing process as well the properties of end product. However, the commercially supplied conventional photoinitiators with low-molecular weights exhibit some inherent disadvantages, such as odor or migration of photolysis species from cured films.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and photoinitiating activity study of polymeric photoinitiators bearing BP moiety based on hyperbranched poly(ester‐amine) via thiol‐ene click reaction

Xie

Shi

2011

J of Applied Polymer Sci

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A series of polymeric photoinitiators (BPHPEAs) bearing BP moiety based on hyperbranched poly(ester-amine) were synthesized via the thiol-ene click reaction of 3-(4-benzoylphenoxy)propyl 2-mercaptoacetate (BPPM) with acrylated HPEA. BPPM was obtained by the esterification of (4-(3-hydroxypropoxy) phenyl) phenyl methanone (HPPM) with mercaptoacetic acid in the presence of p-toluene sulphonic acid as a catalyst. HPEA was prepared through Michael addition of piperazine with tri(hydroxymethyl)propane triacrylate. Their molecular structures were confirmed by the 1 H NMR, 13 C NMR, and FTIR analysis. The UV-vis spectrum analysis results showed that BP-HPEAs exhibit the stronger n-p* absorption at $ 340 nm with over two times higher molar extinction coefficients than BP at the concentration of 1.00 Â 10 À3M. The photoinitiating activity study showed that the maximum photopolymerization rates of 1,6-hexanediol diacrylate initiated by BP-HPEAs in the absence of coinitiator were obtained by two times higher than that by BP in the presence of triethylamine as a coinitiator. Moreover, the excellent miscibility of BP-HPEAs with the commercial bisphenol A epoxy diacrylate was achieved according to the T s /T g ratios of over 9.0 from DMTA.

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Recent Developments

Cited by 71 publications

References 22 publications

Effects of the Amount and Type of Diol Ring Openers on the Properties of Oligolactide Acrylates for UV-Curable Printing Inks

Effects of the Amount and Type of Diol Ring Openers on the Properties of Oligolactide Acrylates for UV-Curable Printing Inks

Soy-Based Building Blocks for Advanced Photocure Coating Systems

Synthesis and photoinitiating activity study of polymeric photoinitiators bearing BP moiety based on hyperbranched poly(ester‐amine) via thiol‐ene click reaction

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