Study on Photopolymerization Performance of Waterborne UV Cured Ink

2010 ◽  
Vol 174 ◽  
pp. 401-404
Author(s):  
Rui Xin Xu ◽  
Guang Xue Chen
Keyword(s):  
Infrared Spectroscopy ◽  
Uv Curing ◽  
Yellow Pigment ◽  
Water Soluble ◽  
Pigment Content ◽  
Toluene Diisocyanate ◽  
Polyurethane Acrylate ◽  
Optimum Content ◽  
Drying Technology ◽  
Dihydroxy Compound

The anion UV-curing water soluble prepolymer was synthesized with toluene diisocyanate, dihydroxy compound, dihydroxyalkyl carboxylic acid and polyurethane acrylate. The structure of the prepolymer was characterized by infrared spectroscopy. The effect of different photoinitiators, pigment content, drying technology on the curing speed of ink was also researched. The results shown that the photoinitiator system 819DW and MBF was best matched with the yellow pigment, cyan pigment and black pigment, the optimum content of the pigment was about 10 percent, 10 percent and 11 percent. The photoinitiator system 819DW and 500 was best matched with the magenta pigment, the optimum content of the pigment was about 10 percent．Under the conditions of this experiment, the best pigment content of the yellow, magenta, cyan, black was about 6 percent, 7 percent, 6 percent and 7 percent. The curing rate without pre-drying increased.

Research on the Modification of Waterborne UV-Curable Polyurethane Acrylate

2013 ◽  
Vol 864-867 ◽  
pp. 698-701
Author(s):  
Jian Yun He ◽  
Yong Liu ◽  
Li Chen He ◽  
Qiang Wang
Keyword(s):  
Uv Curing ◽  
Acrylic Resin ◽  
Ethyl Acrylate ◽  
Toluene Diisocyanate ◽  
Polypropylene Glycol ◽  
Hyperbranched Polyester ◽  
Uv Curable ◽  
Polyurethane Acrylate ◽  
Overall Performance ◽  
Influent Factors

In this study, waterborne UV-curable polyurethane acrylic resin was synthesized using polypropylene glycol, toluene diisocyanate, dimethylol propionic acid and hydroxyl ethyl acrylate, and modified by hyperbranched polyester acrylate. The influent factors on hydrophilic properties and UV curing speed of the resin were discussed, and the modified resin has compared with that of unmodified resin. Results showed that the overall performance and UV curing speed of the resin modified by hyperbranched polyester was greatly enhanced, the hydrophilic property of the resin was proportional to hydrophilic group content.

scholarly journals Comparative Study of Aromatic and Cycloaliphatic Isocyanate Effects on Physico-Chemical Properties of Bio-Based Polyurethane Acrylate Coatings

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1494
Author(s):  
Nurul Huda Mudri ◽  
Luqman Chuah Abdullah ◽  
Min Min Aung ◽  
Mek Zah Salleh ◽  
Dayang Radiah Awang Biak ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Uv Curing ◽  
Toluene Diisocyanate ◽  
Gravimetric Analysis ◽  
Jatropha Oil ◽  
Clear Coat ◽  
Polyurethane Acrylate ◽  
Physico Chemical ◽  
Degradation Pattern ◽  
Coating Formulation

Crude jatropha oil (JO) was modified to form jatropha oil-based polyol (JOL) via two steps in a chemical reaction known as epoxidation and hydroxylation. JOL was then reacted with isocyanates to produce JO-based polyurethane resin. In this study, two types of isocyanates, 2,4-toluene diisocyanate (2,4-TDI) and isophorone diisocyanate (IPDI) were introduced to produce JPUA-TDI and JPUA-IPDI respectively. 2,4-TDI is categorised as an aromatic isocyanate whilst IPDI is known as a cycloaliphatic isocyanate. Both JPUA-TDI and JPUA-IPDI were then end-capped by the acrylate functional group of 2-hydroxyethyl methacrylate (HEMA). The effects of that isocyanate structure were investigated for their physico, chemical and thermal properties. The changes of the functional groups during each synthesis step were monitored by FTIR analysis. The appearance of urethane peaks was observed at 1532 cm−1, 1718 cm−1 and 3369 cm−1 while acrylate peaks were detected at 815 cm−1 and 1663 cm−1 indicating that JPUA was successfully synthesised. It was found that the molar mass of JPUA-TDI was doubled compared to JPUA-IPDI. Each resin showed a similar degradation pattern analysed by thermal gravimetric analysis (TGA). For the mechanical properties, the JPUA-IPDI-based coating formulation exhibited a higher hardness value but poor adhesion compared to the JPUA-TDI-based coating formulation. Both types of jatropha-based polyurethane acrylate may potentially be used in an ultraviolet (UV) curing system specifically for clear coat surface applications to replace dependency on petroleum-based chemicals.

QTL mapping for flour and noodle colour components and yellow pigment content in common wheat

Euphytica ◽  
2008 ◽  
Vol 165 (3) ◽  
pp. 435-444 ◽  
Author(s):  
Yelun Zhang ◽  
Yunpeng Wu ◽  
Yonggui Xiao ◽  
Zhonghu He ◽  
Yong Zhang ◽  
...  
Keyword(s):  
Qtl Mapping ◽  
Common Wheat ◽  
Yellow Pigment ◽  
Pigment Content ◽  
Yellow Pigment Content

Study on the Synthesis of Waterborne UV Curable Polyurethane Acrylate

2016 ◽  
Vol 703 ◽  
pp. 256-260 ◽  
Author(s):  
Zhen Wen Liu ◽  
Jian Yun He ◽  
Wei Jia Kang ◽  
Xi Dan Luo ◽  
Yu Mei Ding ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Influencing Factors ◽  
Water Solubility ◽  
Uv Curing ◽  
Polypropylene Glycol ◽  
Waterborne Coating ◽  
Uv Curable ◽  
Polyurethane Acrylate ◽  
Hydrophilic Group

Water-brone UV-curable polyurethane acrylate was synthesized based on the toluene diisocynate, polypropylene glycol, dihydroxy methyl acrylic acid and hydroxyethyl acrylate. The structure and the influencing factors on the water solubility and photosensitivity of the waterbrone UV-curable polyurethane acrylate were analyzed. Results show that the water solubility of the resin is enhanced with the increasing of the content of hydrophilic group in the resin. The UV-curing rate of the waterborne coating is good by adding the 819-DW photoinitiator. Triethylamine is a good neutralizer in the waterbrone UV-curable system for having 90% neutralization degree.

scholarly journals Preparation and Mechanism of Flame-Retardant Cotton Fabric with Phosphoramidate Siloxane Polymer through Multistep Coating

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1538
Author(s):  
Denghui Xu ◽  
Shijie Wang ◽  
Yimin Wang ◽  
Yun Liu ◽  
Chaohong Dong ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Cotton Fabrics ◽  
Attenuated Total Reflection ◽  
Water Soluble ◽  
Cone Calorimetry ◽  
Siloxane Polymer ◽  
Coated Cotton

To improve the water solubility of phosphoramidate siloxane and decrease the amount of flame-retardant additives used in the functional coating for cotton fabrics, a water-soluble phosphoramidate siloxane polymer (PDTSP) was synthesized by sol-gel technology and flame-retardant cotton fabrics were prepared with a multistep coating process. A vertical flammability test, limited oxygen index (LOI), thermogravimetric analysis, and cone calorimetry were performed to investigate the thermal behavior and flame retardancy of PDTSP-coated fabrics. The coated cotton fabrics and their char residues after combustion were studied by attenuated total reflection infrared spectroscopy (FTIR-ATR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). All results presented that PDTSP-coated cotton fabrics had good flame retardancy and char-forming properties. PDTSP coating was demonstrated to posess gas-phase flame-retardant mechanism as well as a condensed phase flame-retardant mechanism, which can be confirmed by thermogravimetric analysis-Fourier transform infrared spectroscopy (TG-IR) and cone calorimetry test. Also, the preparation process had little effect on the tensile strength of cotton fabrics, although the air permeability and whiteness had a slight decrease. After different washing cycles, the coated samples still maintained good char-forming properties.

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