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. 2021 Nov 12;14(22):6829.
doi: 10.3390/ma14226829.

Transparency- and Repellency-Enhanced Acrylic-Based Binder for Stimuli-Responsive Road Paint Safety Improvement Technology

Won-Bin Lim  1 , Ji-Hong Bae  1 , Gyu-Hyeok Lee  1 , Ju-Hong Lee  1 , Jin-Gyu Min  1 , PilHo Huh  1
Affiliations

Transparency- and Repellency-Enhanced Acrylic-Based Binder for Stimuli-Responsive Road Paint Safety Improvement Technology

Won-Bin Lim et al. Materials (Basel). .

Abstract

In the current study, an acrylic polymer binder applicable to road signs was successfully developed by mixing various acrylic, acrylate-type, and photoinitiator-based monomer species at different acrylate series/silicone acrylate ratios. An amorphous acrylic monomer was used, and the distance between the polymers was increased to improve transparency. The binder was designed with the purpose of reducing the yellowing phenomenon due to resonance by excluding the aromatic ring structure, which is the main cause of yellowing. The optical properties of the binder were determined according to the content of n-butyl methacrylate/methyl methacrylate and the composition of the crosslinking agent in the formulation. Allyl glycidyl ether and dilauroyl peroxide were used to improve the yellowing problem of benzoyl peroxide, an aromatic photoinitiator. Adding a silicone-based trivalent acrylic monomer, 3-(trimethoxysilyl)propyl methacrylate (TMSPMA), was also found to have a significant effect on the transparency, shear properties, and water resistance of the binder. When 15 wt% TMSPMA was added, the best water repellency and mechanical properties were exhibited. The surface morphology of the improved binder and the peeling part were confirmed using field emission scanning electron microscopy. The acrylic polymer developed in this study can be applied in the coating and adhesive industries.

Keywords: acrylic polymer; binder; external stimuli-responsive material; photostimulation; stimuli responsive polymer.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Scheme 1
Scheme 1
The synthetic procedure used to form an acrylic polymer binder.
Figure 1
Figure 1
Binder sample photographs according to formulations: (a,b) using AGE or BMA based on BPO, (c–f) TMSPMA different contents (0~25 wt%) based on DP.
Figure 2
Figure 2
Properties of binders as a function of TMSPMA content (0 wt%, 5 wt%, 15 wt%, and 25 wt%): (a) stress–extension curves of binders, (b) UV transmittances (%) of binders; (c) gel rate (%) of binders injected with THF; (d) contact angle (degree) with water of binders.
Figure 3
Figure 3
Cross-sectional morphology images of binder with improved shear strength: (a) 5 wt% TMSPMA, (b) 15 wt% TMSPMA, (c) 25 wt% TMSPMA.
Figure 4
Figure 4
FE-SEM images of binder interfaces after detachment to adherend: (a) including 15 wt% TMSPMA, (b) not including 15 wt% TMSPMA.
See this image and copyright information in PMC

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