• Applied Chemistry for Engineering
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• v.30 no.3
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• pp.352-357
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• 2019

In this study, a reactive emulsifier with vinyl groups was synthesized by using 3-butenoic acid and polyoxyethylene(20) stearyl ether. The synthesized reactive emulsifier was confirmed by FT-IR and $^1H-NMR$. In addition, the reactive emulsifier synthesized in the preparation of aqueous acrylic pressure sensitive adhesives was used and the properties of the respective pressure sensitive adhesives were compared to those of using commonly used nonionic emulsifiers. The solid content was measured in the range of 56.8~57.4%. In the case of the initial adhesion, the S20BA made with a reactive emulsifier was measured as $^{\sharp}13$. Peel strengths of the prepared adhesives were measured in the range of $0.66{\sim}1.05kg_f$ and the highest peel strength was observed for S20BA. As a result of the heat resistance test, S20BA showed the highest as $840^{\circ}C$. In order to evaluate the applicability of adhesives for skin, the pH value was measured as 7, neutral and also it was found to be non-irritation from primary skin irritation test results.

• Journal of Adhesion and Interface
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• v.22 no.2
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• pp.31-38
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• 2021

In this study, a nonionic reactive emulsifier with aromatic and acryl group was synthesized by using polyoxyethylene(10) dodecylphenyl ether with 3-butenoic acid. The synthesized nonionic reactive emulsifier was confirmed by ¹H-NMR and FT-IR. In addition, the reactive emulsifier synthesized in the preparation of aqueous acrylic adhesives base emulsion was used and the properties of the solid content, conversion, particle size distribution, peel strength and high temperature holding force were compared to those of nonionic emulsifiers without aromatic group. The particle size was distributed from 370 nm to 698 nm, and the peel strength were measured in the range of 1.507~1.802 kg_f. The high temperature holding force of prepared adhesives base emulsion were measured in the range of 0.50~2.00 mm. Especially, in the result of synthesized nonionic reactive emulsifier with aromatic group, it was confirmed that high temperature holding force results were the most excellent than the case of using other nonionic reactive emulsifiers, and it can be useful for water-based acryl pressure sensitive adhesive.

• Polymer(Korea)
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• v.34 no.6
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• pp.491-494
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• 2010

Colored, electrophoretic polymer nanoparticles of poly (styrene-co-divinylbenzene-co-vinyl acetate)[poly(St-co-DVB-co-VAc)] were prepared by emulsifier-free emulsion co-polymerization and reactive dyeing. The emulsifier-free emulsion polymerization of styrene, divinyl benzene and vinyl acetate was carried out at $70^{\circ}C$ for 20 hrs to obtain monodisperse polymer nanoparticles of poly(St-co-DVB-co-VAc) with an average diameter of 180~200 nm. These nanoparticles were transformed into poly(styrene-co-divinylbenzene-co-vinyl alcohol) [poly(St-co-DVB-co-VA)] nanoparticles through the saponification reaction. The poly(St-co-DVB-co-VA) nanoparticles were treated with reactive dyes to obtain the colored, monodisperse electrophoretic nanoparticles, and their morphology and surface charge were characterized by scanning electron microscopy, differential scanning calorimetry, UV/Vis absorbance and zeta-potentiometry.

• Applied Chemistry for Engineering
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• v.30 no.5
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• pp.597-605
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• 2019

In order to improve the adhesion of water-based adhesive, gemini type nonionic reactive surfactants were synthesized and applied to water-based adhesives. The surfactants were synthesized by using maleic acid and polyoxyethylene cetyl ether having different length of ethylene oxide and confirmed by FT-IR and $^1H-NMR$. Their appearance was light yellow wax. The cloud point of the compound was more than $78^{\circ}C$. The measured critical micelle concentration (c.m.c) was $1.0{\times}10^{-4}{\sim}7.0{\times}10^{-4}mol/L$ and surface tension at c.m.c was 25.9~32.0 mN/m. As the number of ethylene oxide increased, the emulsifying power was improved. The foaming height of each compound by Ross-Miles method was 1.4~4.5 cm. The synthesized surfactants was then used as an emulsifier in emulsion polymerization of water-based adhesives and its physical properties were evaluated. The solid contents of prepared adhesives was 59%. The average particle size and initial tackiness of the prepared adhesives were 164~297 nm and ball no. of 20~32, respectively. The peel strength was $1.8{\sim}2.1kg_f/mm$. The retention rate of adhesives viscosity was evaluated to 99% during 30 days. Therefore, synthesized gemini type nonionic reactive surfactants are expected to be applied as an emulsifier for the high adhesive force.

• Journal of the Korean Applied Science and Technology
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• v.33 no.1
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• pp.51-57
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• 2016

In this study, we synthesized reactive surfactant which have functional radical group for effective chemical reaction. Reactive surfactant have been synthesized using synthesis of polyoxyethylene lauryl ether(POE 23) which is nonionic surfactant and methacrylic acid, acrylic acid. benzene was used as the solvent, p-TsOH was used as the catalyst. synthesized surfactant was confirmed by FT-IR, $^1H$-NMR spectra, and elemental analysis. Evaluation of physical properties was measured HLB, cloud point, surface tension, the critical micelle concentration, emulsifying power. HLB number was evaluated 11.62 to 12.09 range. The Critical Micelle Concentration(cmc) values evaluated was $1{\times}10^{-4}{\sim}5{\times}10^{-4}mol/L$ by surface tension method. The cloud point was $35^{\circ}C$, $39^{\circ}C$ each. The emulsifymvcqa ing properties of the synthesized surfactants was lower than polyoxyethylene lauryl ether. In addition, soybean oil was better than benzene. The experimental results confirmed the ester bond, the yield of 93.27%, 94.49% was found.