6674-22-2Relevant articles and documents
Photoinduced redox initiation for fast polymerization of acrylaytes based on latent superbase and peroxides
He, Minghui,Huang, Xun,Huang, Yugang,Zeng, Zhaohua,Yang, Jianwen
, p. 3172 - 3177 (2012)
The article presents a highly effective strategy for photopolymerization of acrylates via photolatent redox-accelerated reaction based on the synergistic photoinitiating systems containing photolatent superbase and readily available peroxides. Polymerization of acrylates could be instantly initiated with the effective interaction between the photogenerated amine and peroxides. Due to the persistent interaction of produced longeval amine with peroxides, remarkable post conversion after irradiation, which is significant for radiation crosslinking of photo-screened materials, was thus initially achieved in photoinitiated free radical polymerization. To explore the synergistic interactions of the photoinitiating systems, the effect of peroxide structures and QA-DBU:BPO ratios had been examined by RTIR, showing that all peroxides are applicable as the final conversion rate of acrylates is concerned. Further, BPO and CHP significantly accelerated the photopolymerization rate in air atmosphere. The synergistic efficiency of QA-DBU and BPO as a photopolymerization initiatiation system was close to that of the conventional D-1173 photoinitiator.
Photoinduced Proton-Transfer Polymerization: A Practical Synthetic Tool for Soft Lithography Applications
Khan, Anzar,Yeo, Hyunki
, p. 3479 - 3488 (2020/02/27)
Proton-transfer photopolymerization through the thiol-epoxy click reaction is shown to be a versatile new method for the fabrication of micro- A nd nanosized polymeric patterns. In this approach, complexation of a guanidine base, diazabicycloundecene (DBU), with benzoylphenylpropionic acid (ketoprofen) generates a photolabile salt. Under illumination at a wavelength of 365 nm, the salt undergoes a photodecarboxylation reaction to release DBU as a base. The base-catalyzed ring opening reaction then creates cross-linked poly(β-hydroxyl thio-ether) patterns. The surface chemistry of these patterns can be altered through alkylation of the thio-ether linkages. For example, a reaction with bromoacetic acid produces a hitherto unknown sulfonium/carboxylate-based zwitterionic motif that endows antibiofouling capacity to the micropatterns.
A 1, 8 - diazabicyclo synthetic method (by machine translation)
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Paragraph 0014-0017, (2019/06/27)
The present invention provides a 1, 8 - diazabicyclo synthetic method, the technical scheme of the DBU synthetic route to an innovative design. Specific perspective, the invention first of all the use of ε-caprolactam, acrylonitrile and hydroquinone reaction generating N - (β - cyanoethyl) - ε-caprolactam, on this basis, will it and to toluene sulfonic acid in catalytic reaction under the condition, and then carry on ice bath, and then under the protection of nitrogen with benzyl chloride reaction, the resulting product to EDTA as the catalyst with high sodium borate reaction, the product of the reaction 3 - phenylpropanoic acid mixed with 4 - nitro benzyl chloride reaction to obtain the product. For the reaction product, filtered and the filtrate is extracted with ethyl acetate, the combined solid-liquid separation after solid phase, then the solid phase for reducing the drying to obtain the final product. The invention adopts the brand new synthetic route, its mild reaction conditions, material cost is relatively low, promotion prospect. (by machine translation)
MANUFACTURING METHOD OF DIAZABICYCLO COMPOUND
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Paragraph 0018; 0042; 0044; 0048, (2018/06/08)
PROBLEM TO BE SOLVED: To provide a manufacturing method for providing a diazabicyclo compound from hydrochloric acid having a diazabicyclo group, which is suitable for industrial production. SOLUTION: There is provided a method for manufacturing a diazabicyclo compound by neutralization with using 20 wt.% to 50 wt.% of an alkali metal hydroxide solution or 10 wt.% to 50 wt.% of an alcohol solution of alkali metal alkoxide of 2.0 times molar equivalent to 3.5 times molar equivalent to hydrochloric acid having a diazabicyclo group. SELECTED DRAWING: None COPYRIGHT: (C)2018,JPO&INPIT