• Title/Summary/Keyword: acrylic PSA

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Pressure Sensitive Adhesive Properties of Blends of Acrylic Quarternary Copolymer with Vinyl Chloride-Vinyl Propionate Copolymers (아크릴계 4원 공중합체와 염화비닐-비닐프로피오네이트 공중합체와의 블렌드의 점착물성)

  • Oh, Dae-Hee;Seo, Kwan-Ho
    • Elastomers and Composites
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    • v.34 no.4
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    • pp.360-365
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    • 1999
  • In this study, the blends of acrylic quaternary polymer (PEBEV) which was co- polymerized from 2-ethylhexyl acrylate (2-EHA), n-butyl acrylate (BA) and ethyl acrylate (EA), vinyl acetate (VAc), and poly(vinyl chloride-co-vinyl propionate) (PVCVP) were prepared by solution blending. Pressure sensitive adhesive (PSA) properties of PEBEV/PVCVP blends were compared with those of PEBEV/poly(vinyl chloride-co-vinyl acetate) (PVCVAc) blends. Compatibility of PEBEV/PVCVP was better than that of PEBEV/PVCVAc. Tackiness of both blend systems were similar, but holding power began to decrease at 15wt% or higher PVCVAc contents in PEBEV/PVCVAc blends. On the other hands, holding power of PEBEV/PVCVP increased as the contents of PVCVP increased. Failure modes of the blends were adhesive failure except 5wt% of PVCVP was blended.

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Development of Shading Tape for Manufacturing of Touch Panel Display with High Screen-to-Body Ratio (기기 면적 대비 높은 화면 비율을 갖는 터치 패널 디스플레이 제조를 위한 차광 테이프의 개발)

  • Kim, Ki-Chul
    • Journal of Convergence for Information Technology
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    • v.7 no.4
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    • pp.75-81
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    • 2017
  • The design trend of information technology is quickly changed with the times. The design trend of information display is a bezel-less display, recently. The bezel-less display or edge-less display is a new trend of mobile phone display. In this study, the shading tape was manufactured for assembling process of touch panel display with the high screen-to-body ratio so-called bezel-less display. The shading tape was fabricated on PET film with the UV curable acrylic pressure sensitive adhesive(PSA) by roll-to-roll process. The UV curable PSA was synthesized with the eco-friendly toluene-less manufacturing method. The adhesive power of manufactured shading tape was investigated by motorized tensile testing machine. The thixotropic, maintaining property of cutting shape, was characterized by field emission scanning electron microscope. As results, the shading tape exhibits high adhesive power and good thixotropic performance suitable for assembly process of touch panel display. The functional shading tape will be expected to improve productivity of assembly process of touch panel display.

Manufacture and Properties of Water Soluble Acrylic Type PSA's - Effect of Functional Monomer Change and Atmospheric Plasma Treatment - (수용성 아크릴계 점착제의 제조와 물성 연구 - 기능성 단량체 변화와 대기압 플라즈마 처리영향 -)

  • Sim, Dong-Hyun;Seul, Soo-Duk
    • Polymer(Korea)
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    • v.33 no.1
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    • pp.45-51
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    • 2009
  • Water soluble adhesive was polymerized from butyl acrylate (BA), methyl methacrylate (MMA) and one of various functional monomers such as acrylic acid (AA), 2-hydroxylethyl methacrylate (2-HEMA), glycidyl methacrylic acid (GMA) and acrylamide (AAm). The amount of the functional monomers was 1$\sim$5 wt%/monomer. In order to improve the adhesive power, a substrate was treated using atmospheric flat plasma method. The adhesive power was improved by the addition of the functional monomers with an order of AA> 2-HEMA> GMA> AAm. The holding power of the adhesives, which is related with the thermal properties of the adhesives, increased with the amount of the functional monomers. The effectiveness in improving the holding power has an order of AA > AAm > GMA > 2-HEMA. By treating a substrate with atmospheric flat plasma method, the adhesives containing each of AA, 2-HEMA, GMA and AAm showed the increases of the final adhesion strength by 9.1, 9.4, 9.4, and 1.8%, respectively. In conclusion, the mechanical properties such as adhesive power and holding power could be controlled by introducing.

A Study on the Electron Beam Crosslinking of Acrylic Pressure Sensitive Adhesives for Polarizer Film (전자선 조사를 통한 편광필름용 아크릴계 고분자의 가교화 반응에 대한 연구)

  • Park, Jung-Jin;Choi, Hong-June;Ko, Hwan-Soon;Jeong, Eun-Hwan;Youk, Ji-Ho
    • Polymer(Korea)
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    • v.36 no.3
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    • pp.344-350
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    • 2012
  • New pressure sensitive adhesives (PSAs) for polarizer film were prepared by electron beam (e-beam) radiation to acrylic copolymers, and their adhesive properties were investigated. The acrylic copolymers were synthesized by free radical polymerization of $n$-butylacrylate (BA), 2-hydroxyethyl methacrylate (HEMA), and acrylic acid (AA). The acrylic copolymers were coated on PET release films to a thickness of 25 ${\mu}m$, laminated to polarizer films, and then radiated with e-beam at room temperature. Gel fractions of all the acrylic copolymers after e-beam radiation at 50 kGy were higher than 93%, and their crosslinking densities were increased with increasing the content of HEMA units. PSA prepared by e-beam radiation of acrylic copolymer synthesized with a feed ratio of BA/HEMA/AA = 89.5/10/0.5 (w/w/w) at a dose of 50 kGy exhibited the best adhesion performances in terms of peel strength, creep resistance, durability and reliability, and light leakage. It is expected that the preparation method of PSAs via e-beam irradiation will improve the producibility and workability of polarizer film for liquid crystal display.

Adhesive and Removable Characteristics of UV Curable Adhesive (자외선 경화형 점착제의 접착 및 재박리 특성)

  • Kim, In Beom;Lee, Myung Cheon
    • Korean Chemical Engineering Research
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    • v.46 no.1
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    • pp.76-81
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    • 2008
  • UV curable pressure sensitive adhesive (PSA) was made by blending the di-functional or hexa-functional urethane-acrylate oligomer with synthesized acrylic PSA. The change of adhesive property and removability were investigated at various oligomer contents under each oligomer. As the content of oligomer increased, the peel strength was increased before UV irradiation, but it was decreased after UV irradiation. Also, it was observed that the peel strength increased with decrease of storage modulus (G'), and that loss factor (tan ${\delta}$) of the adhesive material affected the adhesive properties and removability.

Formulation and Evaluation of Transdermal Patch Containing Sibutramine

  • Subedi, Robhash Kusam;Jang, Jun-Ho;Kim, Jae-Il;Park, Young-Joon;Choi, Hoo-Kyun
    • Journal of Pharmaceutical Investigation
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    • v.40 no.1
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    • pp.33-38
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    • 2010
  • Sibutramine is a serotonin-norepinephrine reuptake inhibitor indicated for the management of obesity in conjunction with a reduced calorie diet. The oral administration of sibutramine is followed by its dose-related side effects. In this study, sibutramine was formulated into drug in adhesive (DIA) patches in an attempt to overcome these problems. The effects of different formulation variables including pressure-sensitive adhesive (PSA), loading amount of drug, thickness of matrix and enhancer on the skin permeation of the drug were evaluated using excised hairless mouse skin. In the acrylic adhesive with carboxyl functional group, low release of sibutramine was observed due to the strong interaction between carboxyl group of adhesive and amine group of sibutramine. The acrylic adhesive without functional group provided good adhesion force and allowed high drug loading. Changing drug load as well as thickness of the matrix was found to alter permeation rate. $Crovol^{(R)}$ PK40 and $Crovol^{(R)}$ A40, were found to be effective enhancers for sibutramine. The optimized patch contained 20% sibutramine, and 5% $Crovol^{(R)}$ A40 as permeation enhancer, in $80\;{\mu}m$ thick Duro-$Tak^{(R)}$ 87-9301 matrix.

Enhanced Dispersion of Yttria Stabilized Zirconia by Mixed Dispersants Containing Carboxyl Group in Aqueous System (수성 현탁액에서 카르복실기를 포함하는 혼합 분산제에 의한 이트리아 안정화 지르코니아의 분산성 향상)

  • Kim, Soo-Hyun;Kang, Jong-Bong;Bae, Sung-Hwan
    • Korean Journal of Materials Research
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    • v.28 no.2
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    • pp.82-88
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    • 2018
  • Stable slurries of YSZ in aqueous suspension with added polymer dispersants, namely, poly-methacrylic acid ammonium salt (PMMA), poly-acrylic acid (PAA) and poly-acrylic-co-maleic acid (PAMA), were mixed with the monomolecular dispersants citric acid and oxalic acid. The dispersion properties of the suspension were investigated using PSA, viscosity, sedimentation, and FT-IR. The polymer dispersants and monomolecular dispersants were attached to the YSZ surface by the carboxylic group, as shown by the FTIR results. A stabilized aqueous suspension was obtained when the polymer dispersant and citric acid were mixed and compared to the use of citric acid alone as a dispersant agent. When the polymer dispersant and citric acid were mixed and milled through attrition milling, there was a smaller particle size compared to when the polymer dispersant alone was used as a dispersant agent. This study determined that the particle size of the mixed dispersant was affected by the properties of the monomolecular dispersant and that the stability of the suspension was affected by the polymer dispersant. However, when slurries of YSZ were mixed with oxalic acid, the particle bridging behavior was the result of the high degree of viscosity and the small sedimentation height.

Effect of Silane Coupling Agent on Adhesion Properties between Hydrophobic UV-curable Urethane Acrylate and Acrylic PSA (소수성 UV 경화형 우레탄 아크릴레이트와 아크릴 점착제 사이의 계면 부착력 향상을 위한 에폭시 실란의 영향)

  • Noh, Jieun;Byeon, Minseon;Cho, Tae Yeun;Ham, Dong Seok;Cho, Seong-Keun
    • Applied Chemistry for Engineering
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    • v.31 no.2
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    • pp.230-236
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    • 2020
  • In this study, an adhesive tape with water and impact resistance for mobile devices was developed using a UV-curable urethane acrylate based polymer as a substrate. The substrate fabricated by UV-curable materials shows hydrophobicity and poor wettability, which significantly deteriorates the interface-adhesions between the substrate and acrylic adhesive. In order to improve the interface adhesion, 3-glycidoxy-propyl trimethoxysilane (GPTMS), a silane coupling agent having epoxy functional groups, was selected and incorporated into UV-curable urethane acrylate based polymer resins in various contents. The changes of the chemical composition according to the contents of GPTMS was studied with Fourier-transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) to know the surface bonding properties. Also mechanical properties of the substrate were characterized by tensile strength, gel fraction and water contact angle measurements. The peel strengths at 180° and 90° were measured to compare the adhesion between the substrate and adhesive according to the silane coupling agent contents. The mechanical strength of the urethane acrylate adhesive tape decreased as the silane coupling agent increased, but the adhesion between the substrate and adhesives increased remarkably at an appropriate content of 0.5~1 wt%.

Synthesis of Polymeric Surfactants Using CSTR and Their Emulsion PSA Properties (연속 교반 반응기를 이용한 고분자 유화제 합성 및 에멀션 점착 물성)

  • Seung-Min Lim;Myung-Cheon Lee
    • Journal of Adhesion and Interface
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    • v.24 no.3
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    • pp.77-85
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    • 2023
  • In this research, polymeric anionic surfactants having various molecular weights and acid values were synthesized using a continuous stirred tank reactor (CSTR). The CSTR has an advantage of higher production rate and more constant product properties compared to batch and semi-batch reactors. The polymeric surfactants were made using butyl acrylate as a hydrophobic group and acrylic acid as a hydrophilic group. The synthesized polymeric surfactants were ionized with alkali solution and were used as an anionic surfactant. To investigate the properties as a surfactant, the properties of the synthesized surfactant, such as acid value, critical micelle concentration (CMC) and molecular weight, were measured. The results showed that the acid values of the polymeric surfactants were 60 to 380 and a number average molecular weight were 8,000 to 13,000 g/mol. Also, it was found that the CMC was around 0.01 g/ml, which showed similar level values with ordinary surfactant. To prove the performance of the polymeric surfactant, acrylic emulsion PSAs were synthesized using the acquired polymeric surfactant. The results showed that the maximum peel strength of 21.24 N/25mm when acid value was 150 and molecular weight was 8,500 g/mol. The values of peel strength and initial tack of acrylic emulsion PSAs using polymeric surfactant synthesized in this study showed much higher than those of reference PSAs synthesized using ordinary anionic surfactant, SDS (Sodium Dodecyl Sulfate) and SDS/TRX (Triton X-100).

The Effects of Crosslinking Agent and pH Controlling Agent on Adhesive Properties of Water Soluble Acrylic PSA (가교제 및 pH 조절제가 수용성 아크릴 점착제의 점착 물성에 미치는 효과)

  • Seo, In-Seon;Park, Myung Chul;Lee, Myung Cheon
    • Journal of Adhesion and Interface
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    • v.4 no.3
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    • pp.9-13
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    • 2003
  • In this paper, the effects of crosslinking agent and pH controlling agent on adhesive properties and water solubility of water soluble acrylic pressure sensitive adhesives were studied by adding the crosslinking agents or pH controlling agents after the polymerization. the tack, cohesive strength, and peel strength were measured to evaluate adhesive properties. the turbidity was also measured to evaluate water solubility of pressure sensitive adhesives. When crosslinking agent was added less than 0.2 wt%, tack increased and cohesive strength and peel strength decreased with increasing concentration. When crossinking agent was added more than 0.2 wt%, the results were opposited. When pH controlling agent was added, tack and water solubility decreased and peel strength and cohesive strength increased with increasing concentration. the influence of pH controlling agents on adhesive properties and water solubility of pressure sensitive adhesive increased in the order of lithium hydroxide, potassium hydroxide and sodium hydroxide.

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