• Title/Summary/Keyword: acrylic emulsion

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A Study on Starch-acrylic Graft Copolymerization by Emulsion Polymerization (유화중합에 의한 전분-아크릴 그래프트 공중합에 관한 연구)

  • Hwang, Ju-Ho;Ryu, Hoon;Cho, Ur-Ryong
    • Elastomers and Composites
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    • v.43 no.4
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    • pp.221-229
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    • 2008
  • Starch as matrix polymer was used to do graft copolymerization with 2-ethylhexylacrylate, methyl methacrylate and acrylic acid. The polymerization was carried out by radical emulsion polymerization with increasing contents of starch. When 0.174% of $\alpha$-amylase as enzyme for starch was added, it was found that it made the best stable emulsion. The glass transion temperature of the polymerized material was increased with starch contents. The particle size and viscosity of the emulsion increased with starch contents due to the increased hydroxy group. Peel strength also increased with contents of starch because the enhanced hydroxy group caused to increase affinity between substrate surface and polymer materials. However, the initial tackiness decreased with starch contents owing to film hardness by higher glass transion temperature.

The Optimal Composition Range of the EVA Powder for Resistance Wheel moving Load of Cement Mortar-Type Surface Finishing Material for Parking Slab (시멘트 모르타르계 주차장 바닥 마감재의 윤하중 저항성능을 위한 EVA 분말수지의 최적 첨가 범위에 관한 실험적 연구)

  • Shao, Xu-Dong;Kwak, Kyu-Sung;Chae, Woo-Byung;Bae, Kee-Sun;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2010.05a
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    • pp.67-70
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    • 2010
  • This study investigates the physical properties of the acrylic emulsion mortar according to variable composition set of redispersible emulsion powders. This materials have to be composed of many types of binders and chemical additives. So it is difficult to decide suitable mixing proportion of composition materials. The redispersible emulsion powders using "2, 4, 6, 8kg" of EVA polymers dispersion ranges are prepared with acrylic emulsion mortars and were tested for basic characteristics such as flexural, and compressive strength, wheel load. Through experiments we found that the improved formula to satisfy the standard of wheel load by EVA polymers, and the masration rangs between about 2.0% to 2.6% which the white portland cenmet and EVA polymers is good for resistauce wheel load.

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Study on Mechanical Properties of Waterborne Polyurethane-Acrylic Hybrid Resin for Leather Coationgs (피혁가공용 수용성 아크릴-폴리우레탄 Hybrid Resin의 합성 및 기계적 특성에 관한 연구)

  • Lee, Joo-Youb;Kim, Ki-Jun
    • Journal of the Korean Applied Science and Technology
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    • v.27 no.2
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    • pp.188-195
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    • 2010
  • In this study, we experimented that how to synthesis waterborne urethane-acrylic hybrid resin for leather coatings. First of all, We had analyzed data by FT-IR, SEM and TGA for the machanical properties. By TGA analysis polymers showed heat distortion temperature. and by FT-IR measurement we confirmed that synthesis of urethane and acrylic. In the experiment, solvent resistance, polyurethane and acrylic grades 4-5 showed both a high. Tensile strength measured in the waterborne polyurethane > Acrylic emulsion showed strength in the order. Films were obtained by coating the water born resin on leveled surfaces and allowing them to dry at room temperature for 72hrs. After demolding, the films were kept in a desiccator to avoid moisture contant at $25^{\circ}C$ for 45hrs before the measurements. In this result, the mechanical propersies of waterborne polyurethane-acrylic hybrid resin showed that how effect to resin in leather coating between polyurethane content and acrylic content. Therefore, acrylic emulsion had most high solvent resistance glade and waterborne polyurethane had good result in abrasion test and tensile strength.

Water Resistance and Thermal Properties of Resin Based on Silane-modified Vinyl Acetate-Acrylic Emulsion Copolymers (실리콘 수식 비닐아세테이트-아크릴 공중합체 수지의 방수성 및 열적 성질)

  • Naghash, Hamid Javaherian
    • Polymer(Korea)
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    • v.34 no.4
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    • pp.306-312
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    • 2010
  • Triphenylvinylsilane (TPVS) containing vinyl acetate (VAc), butyl acrylate (BA), and Nmethylolacrylamide (NMA) copolymers were prepared by emulsion polymerization. The polymerization was performed at $80^{\circ}C$ in the presence of auxiliary agents and ammonium peroxodisulfate (APS) as the initiator. Sodium dodecyl sulphate (SDS) and Arkupal N-300 were used as anionic and nonionic emulsifiers, respectively. The resulting copolymers were characterized by using Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), and dynamic light scattering (DLS). Thermal properties of the copolymers were studied by using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The morphology of copolymers was also investigated by scanning electron microscopy (SEM) and then the effects of silicone concentrations on the properties of the TPVS-containing VAc-acrylic emulsion copolymers were discussed. The obtained copolymers have high solid content (50%) and can be used in weather resistant emulsion paints as a binder.

Performance Evaluation of Polymer Cementitious Interior Finish Using Light-Weight Aggregates Containing Pyroligneous Liquid (목초액 담지체를 골재로 사용한 폴리머 시멘트계 내장마감재의 성능평가)

  • Lee, Chae-Young;Kim, Joo-Young;Kim, Wan-Ki
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2014.05a
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    • pp.218-219
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    • 2014
  • The purpose of this study is to develop eco-friendly internal material of acrylic emulsion mortars using light-weight aggregate carrier which contains pyroligneous liquid. Four types of light-weight aggregates (vermiculite, perlite, charcoal, zeolite) that are widely used in building materials are selected and the properties such as adhesion, water absorption coefficient, antibiosis, crack and impact resistance are evaluated in accordance with KS F 4715. As a result, the properties of acrylic emulsion mortars using light-weight aggregate carrier are satisfied with KS requirements. The antibiosis is improved with increasing zeolite light-weight carrier content.

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Effect of Functional Monomers on Pressure-sensitive Adhesives of Acrylic Emulsion (아크릴에멀젼 점착제에 대한 기능성 단량체의 영향)

  • Choi, Yong-Hae;Kang, Jin-Kyu;Lee, Won-Ki
    • Journal of Adhesion and Interface
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    • v.10 no.1
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    • pp.1-10
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    • 2009
  • The waterborne acrylic pressure-sensitive adhesive in the basis of butylacylate (BA) and 2-Ethylhexylacrylate (2-EHA) was synthesized and the methyl methacrylate (MMA) have been used to give the rigidity perfroamce. The polymreric latex was synthesized using butyl acrylate (BA), 2-ethylhexyl acrylate (EHA), methyl methacrylate (MMA) and each 1, 2, 3% of various functional monomers. The dimethyl-2-imidazlidon acrylate and 2-acrylamido-2-methyl-1-propanesulfonate was used in order to increase the wetting properties of acrylic emulsion. To study of properties of functional monomer, The polymreric latex was synthesized various functional monomers each 1, 2, 3%. The 2-acrylamido-2-methyl-1-propanesulfonate showed the best properties. Latex with acrylic acid and dimethyl-2-imidazlidon acrylate had good peel strength, holding power, but it showed that they didn't separate from adhered cleanly by weak cohesion strength. The adhesion performance was increased by increasing amount of 2-acrylamido-2-methyl-1-propanesulfonate however latexes with upper 7% 2-acrylamido-2-methyl-1-propanesulfonate showed that the properties of PSA decreased.

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Preparation and Resistant Property of Acrylic Adhesives for Automobiles Protection (자동차 보호용 아크릴 점착제의 제조 및 내성조사)

  • Hahm, Hyun-Sik;Park, Ji-Young;Ahn, Sung-Hwan;Kim, Song-Hyoung;Hong, Suk-Young;Park, Hong-Soo
    • Journal of the Korean Applied Science and Technology
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    • v.23 no.2
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    • pp.169-176
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    • 2006
  • Acrylic adhesives for automobiles protection were prepared by emulsion polymerization. Monomers used were n-butyl acrylate(BA), acrylonitrile (AN), butyl methacrylate(BMA), glycidyl methacrylate(GMA), and acrylic acid (AA). Emulsifiers used were sodium lauryl sulfate and polyoxyethylene lauryl ether, which are an anionic emulsifier and a nonionic emulsifier respectively. Potassium persulfate was used as an initiator and polyvinyl alcohol was used as a stabilizer. Emulsion polymerization was carried out in a semi-batch reactor at $70^{\circ}C$ and agitation speed was kept at 200 rpm. Water resistance, heat resistance, acid resistance, alkali resistance and smoke resistance were examined. As a result, when each 0.03 mole of GMA and AA was introduced, the adhesion properties and various above mentioned resistances of the prepared adhesives were satisfied the standard for automobiles.

Adhesive Properties of Acrylic Emulsion Pressure Sensitive Adhesives with Polymeric Emulsifier (고분자 유화제를 이용한 수성 아크릴 에멀션 점착제의 접착 물성)

  • 박명철;이명천
    • Polymer(Korea)
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    • v.27 no.6
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    • pp.596-602
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    • 2003
  • A Polymeric emulsifier was synthesized by solution polymerization with 2-ethylhexyl acrylate, n-butyl acrylate, and acrylic acid. A series of polymeric emulsifier have been used in the emulsion copolymerization of 2-ethylhexyl actryacrylate and n-butyl acrylate. The size of the synthesized latex particles was around 145 nm and its distribution was very narrow. Emulsion with polymeric emusifier showed no coagulum after 7 cycles of freeze-thaw test, while the emulsion with traditional emulsifier exhibited coagulum after 2 cycles. The adhesion tests showed that the initial tackiness and peel strength decreased as the molecular weight and acrylic acid content of polymeric emulsifier increased, whereas the holding power increased.

Effect of Vinyl Acetate-Ethylene(VAE) Emulsion on Coated Paper Properties (비닐아세테이트 에틸렌 공중합체 바인더가 도공지의 품질에 미치는 영향)

  • Lee, Yong-Kyu;Won, Jong Myoung;Lee, Woo-Jae;Choi, Yong-Hae
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.45 no.5
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    • pp.37-43
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    • 2013
  • This study was focused on applying a new paper coating binder, vinyl acetate-ethylene(VAE) emulsion, with SB-latex and acrylic emulsion for paper coating application. VAE emulsion has a low monomer cost and is non-toxic chemical than conventional adhesive for paper coating such as styrene-butadiene latex( SB-latex) and acrylic emulsion. We conducted double coating in order to test VAE emulsion, which was applied on top surface only. The results showed that optical properties of the coated paper with VAE were similar with the SB-latex binders. In case of bonding strength, dry-pick of the coated paper with VAE showed almost same with other binders while wet-pick of the coated paper with VAE had a little bit lower strength than that with SB-latex.

Study on Polymerization Condition of Water-based Acrylic Adhesion (수분산성 아크릴계 점착제 중합 조건에 관한 연구)

  • Lee, Haeng Ja;Jang, Suk Hee;Chang, Sang Mok;Kim, Jong Min
    • Korean Chemical Engineering Research
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    • v.48 no.5
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    • pp.609-614
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    • 2010
  • In this study, emulsion polymerizations for synthesizing acrylic pressure-sensitive adhesive(PSA) were carried out using 2-ethylhexyl acrylate(2-EHA), n-butyl acrylate(n-BA), methyl metacrylate(MMA) as fundamental monomers and acrylic acid(AAc) as a functional monomer in the presence of anionic SLS (sodium lauryl sulfate). To obtain the optimized synthetic condition in the polymerization, we analyzed the polymerization variables such as the effect of surfactant concentration and hydrophilic lipophilic values(HLB). At the same time, the final adhesive properties were also analyzed by the function of the initiator concentration and buffer concentration. In the results, the most stable emulsion was obtained at the surfactant concentrations between 3 and 5 wt%. It was also determined the effect of HLB value of nonionic surfactant and the initiator concentrations on the gel content. Stable emulsion is obtained using the surfactant having HLB value of 12.3. The rate of emulsion polymerization was increased at the initiator concentration greater than 1 wt%, but the stability of the emulsion was decreased. Finally, the effect of the buffer concentrations on the pH and the conversion of the acrylic emulsion product were experimentally measured. At the sodium bicarbonate concentration above 0.4 wt%, the buffer infulence was apparent. The buffer effect was fully acceptable at the concentrations between 0.6 and 0.8 wt% regardless of the monomer composition.