Preparation and properties of green <scp>UV</scp>‐curable itaconic acid cross‐linked modified waterborne polyurethane coating

Dong, Xiangbin; Ren, Jingyu; Duan, Yanjie; Wu, Dandan; Lin, Lin; Shi, Jichao; Jia, Runping; Xu, Xiaowei; He, Xinyao

doi:10.1002/app.52042

Cited by 21 publications

(12 citation statements)

References 61 publications

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“…16 Therefore, it could be inferred that the nanoindentation hardness of WPU and WPU-g-PDMS 2 coatings matches the pencil hardness of 6H. However, the introduction of PDMS would decrease the nanoindentation hardness to a certain extent due to the lower cross-linking degree of the coating 51 and the higher phase separation degree of the WPU-g-PDMS 2 coating than the WPU coating. 52,53 The result indicates that the waterborne NP-GLIDE coating of WPU-g-PDMS has high hardness, which could resist external damage.…”

Section: Transparency Hardness and Adhesion Of Wpu-g-pdms Coatingmentioning

confidence: 97%

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

Lei

Zhou

et al. 2023

ACS Appl. Mater. Interfaces

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Green and environment-friendly preparation are of the utmost relevance to the development of transparent antismudge coatings. To prepare a waterborne polyurethane (WPU) coating with antismudge property, it is challenging to balance the stability of dispersion and the antismudge property of coating. Herein, we prepare a transparent bio-based WPU coating grafted with a minor proportion of poly(dimethylsiloxane) (WPU-g-PDMS) using renewable castor oil, monocarbinol-terminated PDMS, hexamethylene diisocyanate trimer, and 2,2-bis(hydroxymethyl)propionic acid as raw materials. Effects of the dosage of monocarbinol-terminated PDMS, the curing temperature, and the curing time on the antismudge performance were studied. Results showed that rigorous stirring (3000 rpm) is necessary to obtain a stable WPU-g-PDMS dispersion with a storage time longer than 6 months. A high curing temperature (>160 °C) and a period of curing time (>1 h) are indispensable to obtain the excellent antismudge property because they would facilitate the grafted low-surface-tension PDMS chains to migrate from the interior to the coating surface. The facts that simulated contaminated liquids such as water, HCl solution, NaOH solution, artificial blood, and tissue fluid could slide off easily and cleanly, and marker ink lined on the coating surface could shrink, indicated that the WPU-g-PDMS coating has good antismudge properties, which could be self-compensated shortly after deterioration. Due to the high cross-linking degree caused by multifunctional polyol and isocyanate, the WPU-g-PDMS coating has high hardness and good anticorrosive performance. The antismudge functionalization and waterborne technology of bio-based polyurethane coatings proposed in this work could be a promising contribution to the green and sustainable development of functional coatings. This kind of WPU-g-PDMS coating is expected to protect and decorate electronic screens, vehicles, and buildings, especially endoscopes.

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Section: Transparency Hardness and Adhesion Of Wpu-g-pdms Coatingmentioning

confidence: 97%

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

Lei

Zhou

et al. 2023

ACS Appl. Mater. Interfaces

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“…After drying for 12 h at 40 °C under vacuum, the WPR films and THF were added into the Soxhlet extractor and heated to reflux for 24 h . Afterward, the remaining WPR films were dried at 40 °C for 12 h. We compared the residual mass with the initial mass to obtain the gel content value by Equation ( 2) [32]:…”

Section: The Conversion Of Acrylate Double Bondsmentioning

confidence: 99%

Synthesis and properties of a novel waterborne photosensitive resin for 3D printing

Luo¹,

Zhang²,

Xu³

et al. 2023

Express Polym. Lett.

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A series of novel waterborne photosensitive resins were prepared successfully with poly(propylene oxide) bis(2-aminopropyl ether), tricyclodecane dimethanol diacrylate, 2-isocyanatoethyl acrylate, and hydrochloric acid by Michael addition reaction. The results show that with the increasing double bonds content, the double bonds conversion increases from 78.7, 85.6 to 92.8% in the photopolymerization, respectively, and the gel content of the UV-cured film increases from 48.05, 69.10 to 83.28%. In addition, the glass transition temperature and tensile strength of the UV-cured film follow the same increasing trend. Moreover, the content of hydrochloride has a great influence on the hydrophilicity of the waterborne photosensitive resins. The studies indicated that as the hydrochloride content decreases, the surface water contact angle of the UV-cured film increases from 10.8, 22.9 to 51.5°, and water absorption decreases from 26.55, 16.20 to 11.06%, respectively. Moreover, the waterborne photosensitive resins exhibited a high printing accuracy together with a good effect of washing and are promising for 3D printing.

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“…The reason might be that the hard segment urethane bonds formed after cross-linking, which reduced the migration of the chain segments. The thermal stability of the material was enhanced after cross-linking [61].…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

A New Approach Utilizing Aza-Michael Addition for Hydrolysis-Resistance Non-Ionic Waterborne Polyester

Gong

Zhu

2022

Polymers

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This work first synthesized a series of linear polyesters by step-growth polycondensation, then an amino-terminated hydrophilic polyether was grafted to the polyester as side-chains through aza-Michael addition to prepare a self-dispersible, non-ionic waterborne comb-like polyester (NWCPE). In contrast to traditional functionalization methods that usually require harsh reaction conditions and complex catalysts, the aza-Michael addition proceeds efficiently at room temperature without a catalyst. In this facile and mild way, the NWCPE samples with number-average molecular weight (Mn) of about 8000 g mol−1 were obtained. All dispersions showed excellent storage stability, reflected by no delamination observed after 6 months of storage. The NWCPE dispersion displayed better hydrolysis resistance than an ionic waterborne polyester, as was indicated by a more slight change in pH value and Mn after a period of storage. In addition, the film obtained after the NWCPE dispersion was cross-linked with the curing agent, it exhibited good water resistance, adhesion, and mechanical properties.

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Preparation and properties of green UV‐curable itaconic acid cross‐linked modified waterborne polyurethane coating

Cited by 21 publications

References 61 publications

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

Bio-Based Waterborne Polyurethane Coatings with High Transparency, Antismudge and Anticorrosive Properties

Synthesis and properties of a novel waterborne photosensitive resin for 3D printing

A New Approach Utilizing Aza-Michael Addition for Hydrolysis-Resistance Non-Ionic Waterborne Polyester

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