• Title/Summary/Keyword: acrylic pressure sensitive adhesive

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A Study on Thermal Conductive Acrylic Pressure Sensitive Adhesive with Alumina and Graphite (알루미나와 흑연을 포함하는 열전도성 아크릴 점착제의 연구)

  • Oh, Ji Hwan;Jang, Sun Ho;Yoo, Seong Sik;Cho, Ryong
    • Journal of the Semiconductor & Display Technology
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    • v.16 no.3
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    • pp.93-98
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    • 2017
  • 2-Ethylhexyl acrylate, butyl acrylate, methyl methacrylate, and 2-hydroxyethyl methacrylate were polymerized to synthesize acrylic pressure sensitive adhesive (PSA). Alumina and graphite as a filler were added to acrylic PSA to give thermal conductivity. In case of addition of both graphite and alumina, the thermal conductivity of PSA was increased compared with alumina alone due to enhancement of contact between two fillers followed by increasing thermal path in PSA matrix.

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Effect of Acrylic Acid Contents and Inorganic Fillers on Physical Properties of Acrylic Pressure Sensitive Adhesive Tape by UV Curing (아크릴산 함량 및 무기물 충전제가 UV 경화형 아크릴 점착테이프의 물성에 미치는 영향)

  • Kim, Dong-Bok
    • Polymer(Korea)
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    • v.37 no.2
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    • pp.184-195
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    • 2013
  • Acrylic pressure sensitive adhesive (PSA) tapes were used for the automotive, the electrical and the electronic industries and the display module junction. In this study, the manufacture of high-strength structural tape used 2-ethylhexyl acrylate (2-EHA) and acrylic acid (AAC), and UV irradiation for photo-polymerization, and the semi-structural properties of acrylic PSA tape with the AAC content and inorganic filler $SiO_2$ content were investigated. The initial adhesion strength was lowered by the rigidity of molecule chains due to the use of AAC, and the adhesion strength increased with increasing wetting time. The wetability, contact angle, and SEM images of PSA tapes with various contents of AAC were determined. Without filler, the peel strength and dynamic shear strength of PSA tape showed inverse correlation but the peel strength and dynamic shear strength increased with increasing filler content. From these correlations the PSA tapes could be optimized for the applications requiring high performance.

Effect of Liquid Isoprene Rubber on the Adhesion Property of UV Curable Acrylic Pressure-Sensitive Adhesive (액상 이소프렌 고무가 자외선 경화형 아크릴 점착제의 점착 특성에 미치는 영향)

  • Lee, Jiye;Chung, Kyungho
    • Elastomers and Composites
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    • v.49 no.3
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    • pp.210-219
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    • 2014
  • In this study, the acrylic pressure sensitive adhesive (PSA) for the optical functionality sheet was prepared by blending liquid isoprene rubber. The acrylic PSA was synthesized with butyl acrylate, acrylic acid, 2-ethylhexyl acrylate and 2-hydroxyethyl methacrylate. Toluene was used to a solvent for polymerization. Liquid isoprene rubber (LIR-50) was blended with the acrylic PSA and blend ratio was 0 ~ 50 wt%. According to the results, the adhesive transfer, which was the big problem of acrylic adhesive, was reduced with the addition of LIR-50. The secondary bonding of LIR-50 with substrate did not occurred due to absence of polar group in LIR-50. The peel strength and adhesive transfer were decreased by UV curing and the degreed of decrease depended on the amounts of photoinitiator and UV irradiation time. On the other hand holding power increased drastically by increasing amounts of photoinitiator and UV irradiation time.

Optimization of Peel Adhesion of Acrylic Pressure Sensitive Adhesive using Design of Experiments (실험계획법을 이용한 아크릴 점착제의 점착력 최적화)

  • Lee, Young Sang;Ha, Jin Kuk;Lee, Euy Soo
    • Journal of Adhesion and Interface
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    • v.9 no.1
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    • pp.22-27
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    • 2008
  • The effect of functional monomers on the acrylic pressure sensitive adhesive (PSA) property was measured. Design of experiments in order to optimal peel adhesion was applied and commercial program (MINITAB) was used. Analysis was used to mixture design (special cubic model) in response surface methodology. Optimal monomer compositions was construed by 2-EHA (0.8861), EA (0.0639), MAA (0.03) and AAm (0.02). The estimated regression equation was as follows : $$y=54.8816x_1+80.7067x_2-44.4700x_3-99.0288x_1x_2+60.7706x_1x_3-441.030x_2x_3+974.341x_1x_2x_3$$.

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Synthesis of Acrylic Pressure-Sensitive Adhesive by Emulsion Polymerization (유화중합에 의한 수성 아크릴계 접착제의 합성)

  • Kim, Dong-yeub
    • Journal of the Korean Society of Industry Convergence
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    • v.9 no.1
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    • pp.45-50
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    • 2006
  • In order to analyse the properties of the fiber-adhesive that was used as Flocking process we synthesized quaterpolymer with the variation of the types of monomer ratio by emulsion polymerization. We characterized the properties of this adhesive: Differential Scanning Calorimeter(DSC), Thermogravimetry Analysis(TGA), Raman spectroscopy. The polymer was synthesized by changing the using amount of 2-EHAM, and then we investigated the characteristics of glass transition temperature(Tg), melting temperature(Tm), thermal stability and hydroxyl group respectively. The optimum monomer composition was 36.84% EAM, 15.79% MAM, 42.1% 2-EHAM and 5.26% AAc.

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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.

The Effects of Coupling Agent and Crosslinking Agent in the Synthesis of Acrylic Pressure Sensitive Adhesive for Polarizer Film (편광필름용 아크릴 점착제의 합성에서 커플링제와 가교제의 효과)

  • Lim, Chang-Hyuk;Ryu, Hoon;Cho, Ur-Ryong
    • Polymer(Korea)
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    • v.33 no.4
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    • pp.319-325
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    • 2009
  • The solution polymerization was conducted to synthesize pressure sensitive adhesive for polarizer film using acrylic monomers. 2-Ethylhexylacrylate, butylacrylate, acrylic acid were used as acrylic monomers. The ratio was 2-ethylliexylacrylate:butylacrylate:acrylic acid=25:50:3.6 by reflecting $-40^{\circ}C$ of glass transition temperature in the pressure sensitive adhesive. When 1 wt% of coupling agent was added to the polymerized pressure sensitive adhesive, the light transmissivity was significantly increased. This result is due to the enhancement of adhesive power against liquid crystal cell by Si-O bond of coupling agents. Cross-linking agent was added by 0.5, 1.0, and 1.5 wt% with respect to the synthesized polymer. Initial tackiness decreased, while cohesion increased with increasing crosslinking agent. In the analysis of contact angle, the increase of crosslinking agents yielded the enhancement of surface energy, resulting in the decrease of contact angle. From the measurement of heat resistance, the acrylic pressure sensitive adhesive showed excellent heat resistance regardless of change in temperature and contents in crosslinking agent. In the observation of a cutting plane, the increased crosslinking agent represented a smoother and cleaner section. Comprehensively, the optimum additive amount of crosslinking agent was determined to be 1.0 wt% to monomer.

Effects of the Rheological Properties of UV Cured Acrylic Pressure Sensitive Adhesive with Nano-particles on the Silk Screen Printing and Adhesion (실크 스크린 인쇄 및 점착력에 나노 입자가 포함된 UV 경화형 아크릴계 감압 점착제의 유변학적 특성)

  • Cho, Min-Jeong;Kang, Ho-Jong;Kim, Dong-Bok
    • Journal of Adhesion and Interface
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    • v.18 no.1
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    • pp.25-32
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    • 2017
  • For application to display module junction process, the silk screen printing based on UV curable acrylic pressure sensitive adhesive(PSA) with silica nano-particles and the rheological properties were studied to investigate the effect on printability and adhesion. The monomers for PSA were based on 2-ethylhexyl acrylate(2-EHA) and acrylic acid(AA) 93:7, butyl acylate(BA), 2-hydroxyethyl acrylate(2-HEA) and tetrahydrofurfuryl acrylate(THFA) were added. Additionally, hydrophobic and hydrophilic nano-particles AEROSIL R974 and AEROSIL 200 were added, respectively. When the ratio of nano-particle was used above 4 or 7 phr, G' and ${\eta}^*$ were increased significantly. When the ratio of AEROSIL 200 was used above 7 phr, the penetration property was decreased during the silk screen printing. We found that the adhesion was decreased with increasing the nano-particle content, and it was decreased in the case of the hydrophilic nano-particle AEROSIL 200.

The Peel Energy Behavior of UV-Cured Acrylic PSAs (UV경화형 아크릴계 점착제의 박리 에너지 변화)

  • Son, Hee-Chul;Kim, Ho-Gyum;Lee, Dong-Ho;Min, Kyung-Eun
    • Polymer(Korea)
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    • v.32 no.4
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    • pp.313-321
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    • 2008
  • Acrylic pressure sensitive adhesive(PSA) was prepared by UV radiation curing and the peel energy and physical properties of PSA were investigated. The increase of amount of acrylic acid leads to improve the peel energy, associated with the substrate having smooth surface and high layer thickness. The high peel energy is obtained when the direction of irregularity in substrate is horizontal with the peeling direction. This is attributed to the increase of resistance to peeling in spite of decrease of wetting and the result corresponds to our supposition.