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. 2023 Feb 3;16(3):1322.
doi: 10.3390/ma16031322.

Synthesis of a Room-Temperature Curable Acrylic-Urethane Polymer Binder for Road Markings with High Transmittance

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

Synthesis of a Room-Temperature Curable Acrylic-Urethane Polymer Binder for Road Markings with High Transmittance

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

Abstract

Triol acrylic-urethane (t-AU) was synthesized from an addition reaction using trimethylolpropane, hexamethylene diisocyanate, and 2-hydroxyethyl methacrylate. The novel acrylic-urethane polymer was applied to a high-performance binder to prepare a reliable road marking paint. Acrylic-urethane polymer binder formulations were designed to optimize the effect of t-AU on the physical properties. The t-AU content in the formulation affected the adhesion and optical properties. The improvement in the adhesive performance and transparency ability for road markings was attributed to the optimal chemical structure or design of the acrylic-urethane polymer. The synthesis of t-AU was confirmed by Fourier transform infrared spectroscopy, and molecular weight and polydispersity index (PDI; PDI = Mw/Mn) measurements. The tensile and shear strength, hardness, gel fraction, crosslink density, contact angle, and transmittance of the acrylic-urethane polymer binder (AUP) were evaluated by curing at room temperature using a redox initiator system. An optimized AUP by adding 5 wt.% t-AU provides a viable alternative to high-performance binders in road marking paints.

Keywords: acrylic-urethane binder; redox initiator system; road marking paint; room temperature curing.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Scheme 1
Scheme 1
Synthetic procedure to prepare a triol acrylic-urethane resin.
Scheme 2
Scheme 2
RTC of an acrylic-urethane polymer binder by mixing triol acrylic-urethane and additives.
Figure 1
Figure 1
FT−IR spectra of triol acrylic-urethane by a reaction of NH groups (A) and C=O groups (B) and by the addition of 2-HEMA.
Figure 2
Figure 2
GPC curves of a triol acrylic-urethane (t-AU) series synthesized based on the same MW formulation.
Figure 3
Figure 3
Tensile strength (A) and shear strength (B) of AUPs as a function of the t-AU content.
Figure 4
Figure 4
Gel rate (A) and average crosslink density (B) of AUP series based on a function of t-AU content.
Figure 5
Figure 5
Transmittance of the AUP series as a function of t-AU content.
Figure 6
Figure 6
Hardness (A) and contact angle (B) of AUP series as a function of t-AU content.
See this image and copyright information in PMC

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