Polyurethane Acrylate Research Articles

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

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.

Fabricating transparent nanomesh-structured hydrophobic films by nanoimprinting UV-curable fluorinated polyurethane acrylates

In this work, a novel method to fabricate transparent nanomesh-structured hydrophobic (TNH) films was developed to improve the optical properties by minimizing light scattering. First, a nickel nanomesh mold was prepared using phase-shifting edge lithography. Subsequently, the TNH film was fabricated by nanoimprinting an ultraviolet-curable fluorinated polyurethane resist. The resist had a water contact angle of 93.2° when coated on a flat polyethylene terephthalate film with no pattern. Micromesh- and nanomesh-shaped patterns were applied to improve the hydrophobic property of the film. It was noted that the use of a micromesh-patterned film could improve the water contact angle to approximately 130°. Furthermore, the TNH films exhibited a water contact angle of more than 150° while maintaining a light transmittance of more than 90%. The TNH films have great potential for applications such as self-cleaning optical devices and anti-icing windows.

Design and Preparation of Tertiary Amine Modified Polyurethane Acrylate Oligomer with Co‐Initiation/Polymerization Bifunctions for Photo‐Curable Inkjet Printing of Textiles

AbstractIn order to resolve the conflict issues existing in currently available polyurethane acrylate (PUA) oligomers for photo‐curable inkjet printing of textile, and to avoid the safety problems caused by the immigration of small molecule amine co‐initiator, a series of tertiary amine modified PUA oligomers are delicately designed and synthesized. The chemical structures of the synthesized PUA oligomers are confirmed by FTIR and 1H‐NMR analyses. The optimized PUA oligomer/hydroxyethyl acrylate based polymerization system show a low viscosity, high storage stability and good compatibility with various functional segments. Furthermore, the modified PUA oligomer acts as both the photopolymerization constituent and the macromolecular co‐initiator assisting to achieve high photopolymerization rate and conversion rate, and avoiding the disadvantages caused by the migration of small amine co‐initiators. Benefitting from the semi‐IPN formed by this polymerization system with suitable crosslinking density and phase separation degree, a soft, strong and flexible cured film is obtained. The high photo‐reactivity with low viscosity of the polymerization system and the good flexibility with high strength of the resultant photo‐cured film ensures the applications of the modified PUA oligomer, and the printed fabrics achieve 4 grade of colorfastness with improved handle properties, as well as brilliant color and fine patterns.

Development of polyurethane acrylate coated salt hydrate/diatomite form-stable phase change material with enhanced thermal stability for building energy storage

Integrating salt hydrate phase change materials (PCMs) into building envelope is a prospective method for retarding indoor temperature fluctuation and thus achieving building energy saving. However, salt hydrates suffer from leakage problem during phase transition, especially dehydration due to their hydrous structure. This paper proposes a two-step stabilizing method is proposed to prepare Na2HPO4·12H2O-Na2CO3·10H2O eutectic salt composite PCMs without leakage. The eutectic salt is first combined with porous diatomite and then coated with a layer of ultraviolet (UV)-cured polyurethane acrylate (PUA) to intensify its form stability. Scanning electron microscope (SEM) and leakage tests demonstrated that dehydration problem of inner salt hydrate was successfully inhibited. Besides, a high latent heat of 102.6 J·g−1 and an ignorable supercooling temperature of 0.5 °C were also found. High thermal reliability and stability were demonstrated by thermogravimetric analysis (TGA) and a thermal cycle test. Furthermore, it is shown that when PUA-coated PCM panels were employed as wallboards of a test chamber, the indoor peak temperature and temperature fluctuations could apparently be decreased. All results show that this CPCM exhibits a promising future as an energy source for practical construction fields.

Performance Analysis of Jatropha Oil-Based Polyurethane Acrylate Gel Polymer Electrolyte for Dye-Sensitized Solar Cells.

Biobased polymers are useful materials in substituting conventional petroleum-derived polymers because of their good properties, ready availability, and abundance in nature. This study reports a new jatropha oil-based gel polymer electrolyte (GPE) for use in dye-sensitized solar cells (DSSCs). The GPE was prepared by mixing jatropha oil-based polyurethane acrylate (PUA) with different concentrations of lithium iodide (LiI). The GPE was characterized by infrared spectroscopy, thermal analysis, lithium nuclear magnetic resonance analysis, electrochemical analysis, and photocurrent conversion efficiency. The highest room-temperature ionic conductivity of 1.88 × 10–4 S cm–1 was obtained at 20 wt % of LiI salt. Additionally, the temperature-dependent ionic conductivity of the GPE exhibited Arrhenius behavior with an activation energy of 0.42 eV and a pre-exponential factor of 1.56 × 103 S cm–1. The electrochemical stability study showed that the PUA GPE was stable up to 2.35 V. The thermal stability of the gel electrolyte showed an improvement after the addition of the salt, suggesting a strong intermolecular interaction between PUA and Li, which leads to polymer–salt complexation, as proven by Fourier transform infrared spectroscopy analysis. A DSSC has been assembled using the optimum ionic conductivity gel electrolyte which indicated 1.2% efficiency under 1 sun condition. Thus, the jatropha oil-based GPE demonstrated favorable properties that make it a promising alternative to petroleum-derived polymer electrolytes in DSSCs.

One-step synthesis of novel renewable multi-functional linseed oil-based acrylate prepolymers and its application in UV-curable coatings

The use of renewable resources and their derivatives provides a "green" approach to synthesizing UV-curable raw materials, and it possesses many advantages, such as environmental protection and energy conservation. Linseed oil has become a research hotspot because of its high content of double bonds and biodegradability. In this study, boron trifluoride diethyl ether was used as a catalyst to successfully introduce acrylic acid into the double bond of linseed oil long chain. Therefore, the UV-curable acrylated linseed oil prepolymers (ALO) were prepared in one step. The characterizations of 1H NMR and FT-IR were employed to verify the successful preparation of ALO. The viscosity of ALO was measured via rheological test, and it was turned out to be 803 mPa·s, indicating the prepolymers had a good processing property. The synthesis mechanism of ALO catalyzed by boron trifluoride diethyl ether was also proposed. Furthermore, different kinds of UV-curable films were prepared by mixing ALO with polyurethane acrylate resin (PUA-2665), trimethylolpropane triacrylate (TMPTA), and photoinitiator (PI-1173). As for the cured films, their thermal stability was investigated by thermogravimetric analysis (TGA), the dynamical mechanical properties were probed via dynamic mechanical analysis (DMA), and the mechanical properties were measured by tensile test. It was found that increasing TMPTA content promoted crosslinking density, leading to the improvement in thermal stability, storage modulus, and tensile strength of the cured films. Besides, they also exhibited excellent hardness, strong adhesion, and outstanding water (solvents) resistance on wood surface. Therefore, this study provides a novel one-step approach for the synthesis of UV-curable materials from vegetable oils, and the as-prepared high-performance films have potential for broad applications.

One-Step Synthesis of Novel Renewable Vegetable Oil-Based Acrylate Prepolymers and Their Application in UV-Curable Coatings.

With the rapid development of social economy, problems such as volatile organic compound (VOC) pollution and the excessive consumption of global petroleum resources have become increasingly prominent. People are beginning to realize that these problems not only affect the ecological environment, but also hinder the development of the organic polymer material industry based on raw fossil materials. Therefore, the modification and application of bio-based materials are of theoretical and practical significance. In this study, a series of vegetable oil-based acrylate prepolymers were synthesized by one-step acrylation using palm oil, olive oil, peanut oil, rapeseed oil, corn oil, canola oil, and grapeseed oil as raw materials, and the effect of different double bond contents on the product structure and grafting rate was investigated. Furthermore, the as-prepared vegetable oil-based acrylate prepolymers, polyurethane acrylate (PUA-2665), trimethylolpropane triacrylate (TMPTA), and photoinitiator (PI-1173) were mixed thoroughly to prepare ultraviolet (UV)-curable films. The effect of different grafting numbers on the properties of these films was investigated. The results showed that as the degree of unsaturation increased, the acrylate grafting number and the cross-linking density increased, although the acrylation (grafting reaction) rate decreased. The reason was mainly because increasing the double bond content could accelerate the reaction rate, while the grafted acrylic groups had a steric hindrance effect to prevent the adjacent double bonds from participating in the reaction. Furthermore, the increase in grafting number brought about the increase in the structural functionality of prepolymers and the cross-linking density of cured films, which led to the enhancement in the thermal (glass transition temperature) and mechanical (tensile strength, Young’s modulus) properties of the cured films.

Four-dimensional printing of shape memory polyurethanes with high strength and recyclability based on Diels-Alder chemistry

A type of polyurethane with high mechanical performance, excellent recycling ability and shape memory property based on Diels-Alder (DA) reactions has been fabricated through digital light processing (DLP) 3D printing. Firstly, polyurethane acrylate with DA-adduct is synthesized, and then compounded with reactive diluent and photoinitiators to get a series of photopolymer resins. Benefiting from the high curing rate and good fluidity, one type of photopolymer is applied in DLP 3D printing. The excellent mechanical and recycling properties of the cured polymers are proved through tensile tests. The printed samples exhibit remarkable shape memory performance with the shape fixity and recovery ratios of 96.4 ± 0.1% and 99.3 ± 0.3%, respectively and high shape recovery stress of 10.1 MPa, which is very high for shape memory polymers.

Facile synthesis of composite films featuring bulk superhydrophobicity, durability, and repairability for aquatic show

Synthesis of bulk superhydrophobic composite materials with durable and repairable properties is of important theoretical and practical significance. Herein, a bulk superhydrophobic composite film (BSCF) is fabricated by integrating organic polymer components, polyurethane acrylate (PUA) and polydimethylsiloxane (PDMS), and inorganic component, silica particles (SiO2). Due to the bulk deposition and construction of the covalently cross-linking polymer scaffolding, the composite film exhibits a unique bulk superhydrophobic property, which is capable of being exposed to the surface under mechanical shear to preserve durable superhydrophobicity. Therefore, the extreme water repellency of the BSCF maintains unaltered even cyclic sandpaper abrasion is conducted (>150 cycles). By exploiting the advantage of the extreme water repellency inside the composite film bulk, the BSCF is also able to repair its deprived superhydrophobicity via a sanding treatment (>30 cycles), which is completely different from the depletion of healing agents. Furthermore, the aquatic light-reflective function of superhydrophobic materials is exploited in this work for the first time and the exploitation of it may broaden the potential application fields of superhydrophobic materials in deep-sea exploitation, undersea transportation, and aquatic decoration. Based on the aquatic light-reflective principle, a series of patterns on the BSCF surface display dazzling light under the illumination of a flashlight and the aquatic show is successfully realized on each layer of the BSCF. Our studies convincingly show a new direction to synthesize composite materials featuring bulk superhydrophobic, durable, and repairable performances for various potential applications.

Three-Dimensionally Micro-Architected Protonic Ceramic Fuel Cells

The solid oxide fuel cells (SOFCs) have been considered as important alternative energy technology, due to a variety of advantages, such as their high energy conversion efficiency, free noxious emissions, and direct use of a wide range of hydrocarbon fuels. Especially, the reverse operation of SOFCs, which is called solid oxide electrolysis cell (SOEC), is currently one of the most promising technologies for fuel production. However, their high-temperature operation (typically >700°C) leads to the rapid degradation of electrodes and necessitates a high balance of plant costs. To make SOFCs more economically feasible and viable, further reduction of operating temperature is inevitable. To this end, the utilization of proton-conducting oxides, which exhibit relatively high ionic conductivity with the low activation energy (<0.5eV), enables protonic ceramic fuel cells (PCFCs) to operate at an intermediate temperature regime (IT, 400–600°C), where the aforementioned benefits of SOFCs can also be accomplished. Moreover, PCFCs prevents the dilution of the fuel during the operation and provides higher resistance of carbon cocking on hydrocarbon fuels.Although the PCFCs have distinct advantages against traditional oxygen conducting SOFCs, the lower-than-predicted performance of PCFCs and scalability issues caused the considerable skepticism of the successful applicability of PCFCs. Most importantly, unlike traditional SOFCs, the development of mixed oxide ion and electron conductors (MIECs) for oxygen reduction reaction (ORR) at the cathode of PCFCs has shown marginal success due to the absence of protonic conduction and still needs to be improved. At the cathode, the ORR is limited to triple phase boundary (TPB), where the electrolyte, gas, and cathode mutually contact, and its geometrical enhancement at the interface area between cathode and electrolyte layers is crucial to improve the performance of PCFCs. Therefore, electrode-electrolyte interface architecting via micro-patterning is one of the most attractive approaches, since it significantly expands the catalytic active sites of TPB near the interface, where ORR preferentially occur. Moreover, this architecting approach also facilitates the use of currently viable state-of-art cathode materials of SOFCs; Lanthanum Strontium Cobalt Ferrite (LSCF), Barium Strontium Cobalt Ferrite (BSCF). Therefore, patterns with a high aspect ratio, which maximize the interface area, are required for significant enhancement of electrochemical performance.Here, for the first time, we describe a three-dimensionally micro-architecting process for anode-supported PCFCs, demonstrating dramatic performance enhancement from the expanded interface area between cathode and electrolyte. The various patterns with high ratios were exactly transferred from the original PUA (polyurethane acrylate) molds to the thin and dense protonic conducting electrolyte layer. The patterns maintained the same aspect ratios during the sintering process and finally increased the interface area of more than 30%. The morphology of the patterned surface was characterized by scanning electron microscope (SEM) and atomic force microscopy (AFM). The AC electrochemical impedance spectroscopy was utilized to examine the electrochemical performances of patterned cells. Our unique patterning method opens the new pathway for further performance enhancement of PCFCs. Figure 1

A novel UV-curing liner for NEPE propellant: Insight from molecular simulations

In this paper, a new simulation strategy was proposed for constructing the UV-curing crosslinking model by using computational programming. Based on this algorithm, the UV curing model of polyurethane acrylate (PUA) liner was effectively built at a molecular scale. Molecular dynamics (MD) simulations were first conducted to estimate the mechanical properties and thermal transition behavior, and the simulated results were a good agreement with the experimentally measured values. Then, the solubility parameters and radial distribution function (RDF) were calculated to get an in-depth understanding of the interface interaction between the liner and other components. Finally, we calculated the diffusion coefficient of nitrate plasticizer molecules in the liner and explored the influencing factors. The dynamic behavior of the nitrate plasticizer in the liner interface was also investigated, and the results demonstrated that PUA liner could effectively prevent the migration of plasticizer because of the higher crosslink density. These researches help us deeply understand the structure-property correlation and provide molecular insight into the mechanisms of nitrate plasticizer migration, which was useful for the structure design and material selection of NEPE propellant liner.

Enhancing weathering resistance of wood by using bark extractives as natural photostabilizers in polyurethane-acrylate coating

In this study, Chinese fir bark was extracted separately by three solvents including sodium hydroxide, 95% ethanol, and hot water, and the obtained extractives were labelled as NaE, EtE, and HWE correspondingly. The ultraviolet (UV) absorption and antioxidation activity of those bark extractives were confirmed. The aim of this study was to improve the photostabilization of polyurethane-acrylate (PUA) coating by incorporating bark extractives as photostabilizers. Then, the modified coatings were used to coat Scots pine wood samples in order to enhance their weathering resistance. During 960 h of accelerated UV weathering, the changes in wood surface color, gloss, morphology, and surface chemistry were investigated. Meanwhile, the photostabilization mechanisms of bark extractives were also discussed. The results showed that (1) the free radical scavenging ability of extractives was related with their total phenolic contents; (2) wood protected by PUA/EtE coating experienced the least severe surface deterioration and photodegradation during the whole weathering process; (3) the photosatbilization effect of EtE mainly resulted from its phenolic compounds, which transferred into ketones and quniones after weathering.

Assessment of corrosion protection and performance of bio-based polyurethane acrylate incorporated with nano zinc oxide coating

In this study, a series of UV-curable anticorrosive PUA coatings embedded with varying concentrations of inorganic ZnO fillers have been successfully prepared from jatropha-based polyol. The electrochemical impedance spectroscopy (EIS) and Tafel polarisation analysis revealed that increasing fillers composition lead to the improvement of the anticorrosive property of the hybrid coatings. Meanwhile, the salt spray test results were found to correlate with the EIS of Cc (F cm−2) was 2.71 × 10−9, Bode plot - 106 Ω cm2 and Tafel polarisation results 7.56 × 10−6 MPY at 3 wt% of ZnO. Physical properties of 3 wt% loading of ZnO fillers in hardness test obtained 6H which was strongly attributed to the low interfacial interaction and poor dispersion of the fillers within the polymer matrix.

Fabrication and performance of UV cured transparent silicone modified polyurethane–acrylate coatings with high hardness, good thermal stability and adhesion

Conventional UV cured PUs suffer from low hardness, which will be scratched during the course of storage and transportation. They also undergoes severe pyrolysis when the temperature exceeds 200 °C, and the poor heat resistance limit their application in the high-temperature field. To address these challenges, a type of UV cured transparent coatings were prepared with thiol silicone resin and polyurethane-acrylate through thiol-ene click reaction. The coatings obtained are with high hardness, excellent scratch resistance, good thermal stability, fairly strong adhesion, efficient water resistance and good UV radiation resistance. More specifically, the pencil hardness and initial thermal decomposition temperature are in the range of 6 B–9 H and 297 °C–306 °C respectively, which are more superior to those of the conventional UV cured PUs. More strikingly, the coatings obtained with excellent scratch resistance because there are no traces on the coatings, even the slides are broken, when the cross cut tests were carried out on the coatings cured for 40 s–60 s. The coatings obtained are also with transmittance in the range of 85 %–99 %, adhesive properties to the slides can reach grade 0, water absorption in the range of 0.23 wt%–0.60 wt%, exposed to UV (7.8 mw.cm−2) at ambient for 180 min without turn yellow. The transparent silicone modified polyurethane–acrylate coatings prepared are promising for widespread applications in the information technology devices and automobile, etc.

Preparation and property study on high 248 nm light transmittance optical fiber coating

Abstract Fiber Bragg Grating (FBG) can be inscribed on optical fiber by ultraviolet (UV) light. In order to increase the efficiency of coating process and ensure long-term protection of optical fiber after FBG, a coating layer with high transmittance on UV light was developed. Based on absorption theory of UV light, acrylic polyurethane resin was selected and synthesized as the fiber coating. As a result, the cured coating film has 85% transmittance on 248 nm light. The high transmittance of cured film on 248 nm light is resulted from overall influence on different functional groups in acrylic polyurethane resin. Polysiloxane is still the main constituent contributing to UV light transmittance. Moreover, 5% decomposition temperature of the coating is 355 °C. SEM, DSC, FTIR, and other tests were conducted. It is revealed that the cured film had good thermostability, high hardness, high adhesion, good alkali and acid resistances and water tolerance. Besides, real production was also conducted. It reveals that the acrylic-polyurethane based coating on optical fiber had both high production efficiency and acceptable quality, which shows a great application prospect.

Hyperbranched polyurethane acrylates synthesized via copolymerization of monomers A2 and B3 with monofunctional compound BR added gradually at different rates

AbstractA kinetic model was proposed to describe hyperbranched polymers (HBPs) formed by the polymerization of monomers A2 and B3 with monofunctional compound (BR) added gradually in a semibatch reactor. The dependences of the degree of polymerization (DP) and the degree of branching on the reaction time and the monomer compositions were calculated. The DP of the HBPs could be increased by the slow addition of BR in the reactor. If the monomers B3 and A2 were mixed at a molar ratio of B3:A2 = 1:3, and the BR was fed slowly into the reactor, the HBPs with weight average DP were approximately 3200 and 16 700 at conversion of 0.95 and 0.99, respectively, which were higher than those prepared by the batch system. This theory was further verified by an experimental demonstration. Hyperbranched polyurethane acrylate can be synthesized with a higher DP in a semibatch system than in a batch reactor.

Preparation of UV-Curable Low Surface Energy Polyurethane Acrylate/Fluorinated Siloxane Resin Hybrid Coating with Enhanced Surface and Abrasion Resistance Properties.

Low surface energy coatings have gained considerable attention due to their superior surface hydrophobic properties. However, their abrasion resistance and sustainability of surface hydrophobicity are still not very satisfactory and need to be improved. In this work, a series of utraviolet (UV)-curable fluorosiloxane copolymers were synthesized and used as reactive additives to prepare polyurethane acrylate coatings with low surface energy. The effect of the addition of the fluorinated graft copolymers on the mechanical durability and surface hydrophobicity of the UV-cured hybrid films during the friction-annealing treatment cycles was investigated. The results show that introducing fluorosiloxane additives can greatly enhance surface hydrophobicity of the hybrid film. With addition of 2 wt.% fluorosiloxane copolymers, the water contact angle (WCA) value of the hybrid film was almost tripled compared to that of the pristine PU film, increasing from 58° to 144°. The hybrid film also showed enhanced abrasion resistance and could withstand up to about 60 times of friction under a pressure of 20 kPa. The microstructure formed in the annealed film was found to contribute much to achieve better surface hydrophobicity. The polyurethane acrylate/fluorinated siloxane resin hybrid film prepared in this study exhibits excellent potential for applications in the low surface energy field.

Preparation and properties of UV-curable hyperbranched polyurethane acrylate hard coatings

In order to efficiently protect plastic cover of 5G mobile phones, a novel hyperbranched polyurethane acrylate-based hard coating (HBPUA) having highly rigid hyperbranched cores was prepared and used as the protective film. For purpose of researching the structure and property relationship, two more hyperbranched cores (Hyper-6OH) and corresponding HBPUA oligomers were also synthesized. The structures of Hyper-6OH and HBPUA were characterised by proton nuclear magnetic resonance, and the molecular weight of HBPUA was confirmed by gel permeation chromatography. To further enhance the crosslinking and lower the internal stress, pentaerythritol tetra(3-mercaptopropionate) (PETMP) was introduced into the film system. The curing behaviours of the prepared HBPUA coatings were determined by Fourier-transform infrared spectroscopy. The results indicated that the double bond conversion was associated with the rigidity of the hyperbranched core and the content of thiol groups. The properties of HBPUA-based films were characterized by the test of gel content, swelling ratio and water absorption and as well as dynamic mechanical property, mechanical property, thermogravimetry and surface property. The results reveal that the pencil hardness of the prepared coatings reaches 5H that is higher than the commercially available resin PUA-6, enabling potential application in the protection of plastic cover. The rigidity of the hyperbranched cores and the introduction of PETMP remarkably affect the Tg value of the films, and the addition of thiol groups increases the gel content, swelling ratio, toughness and adhesion of coatings, but decreases the water absorption and tensile strength. Moreover, all coatings exhibit good thermal properties.

Failure Behavior and Damage Mechanism of Acrylic Polyurethane Coating in Tropical Marine Atmospheric Environment

Failure Behavior and Damage Mechanism of Acrylic Polyurethane Coating in Tropical Marine Atmospheric Environment

The Synergistic Effects of Sio2 Nanoparticles and Organic Photostabilizers for Enhanced Weathering Resistance of Acrylic Polyurethane Coating

This study aims to evaluate the synergical effects of SiO2 nanoparticles (nano-SiO2) and organic photostabilizers (Tinuvin 384 (T384) and Tinuvin 292 (T292)) on the weathering resistance of acrylic polyurethane coating. Data obtained from infrared (IR), field emission scanning electron microscopy (FESEM), and weight loss of coatings (before and after aging test), suggest that the SiO2 nanoparticles play a dual role, as both reinforcer and UV absorber, thus improving effectively both the mechanical properties and the weathering resistance of polyurethane acrylic coatings. The nanocomposite coating containing 2 wt % nano-SiO2, 2 wt % T384, and 1 wt % T292 exhibits excellent weathering and abrasion resistances, offering a durable outdoor application.