• Title/Summary/Keyword: IPDI

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A Synthesis of UV Hard Coating Solution for Plastic Display Plate Using Poly(Urethane Acrylate) Siloxane Oligomer (Poly(Urethane Acrylate) Siloxane Oligomer를 이용한 플라스틱 디스플레이 기판용 UV 하드코팅 용액의 합성)

  • Back, Sung Kyun;Jang, Sun Ho;Yoo, Seong Sik;Cho, Ur Ryong
    • Journal of the Semiconductor & Display Technology
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    • v.16 no.3
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    • pp.87-92
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    • 2017
  • Poly(urethane acrylate) siloxane oligomers with Interpenetrating polymer networked nanoparticles were prepared to synthesize hard coating solution by reaction with isophorone diisocyanate(IPDI) of 1, 2, 3, 4 phr. The structures and molecular weights of the synthesized solutions were characterized by IR spectroscopy and gel permeation chromatography, respectively. In the cross-cut test for the adhesion, all the solutions showed good adhesion of 5B regardless of the content of IPDI and film thickness. The addition of 1 phr IPDI resulted in the best pencil hardness. The IPDI combined siloxane hard coating solution showed more flexibility than the siloxane solution. These results will yield the improvement in the siloxane solution using for plastic display plate.

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Effect of Chemical Structure on the Properties of UV-Curable Polyurethane Acrylates (화학구조가 자외선 경화 폴리우레탄 아크레이트의 물성에 미치는 영향)

  • 김태우;허재호
    • Textile Science and Engineering
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    • v.34 no.10
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    • pp.661-667
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    • 1997
  • UV-curable 2,4-toluene diisocyanate (TDI) and isophorone diisocyanate (IPDI) based urethane acrylate prepolymers for secondary optical fiber coating were prepared from the two isocyanates, and two diols, poly(tetramethylene oxide) glycol (PTMG, MW=650) and hexane diol (HD), and 2-hydroxyethyl acrylate (HEA) with dibutyl tin dilaurate as a catalyst. UV-curable coating materials were formulated from the prepolymer and five different diluents and 1-hydroxy cyclohexyl phenyl ketone (Irgacure 184) as a photoinitiator. The effects of chemical structure on the refractive index of W-curable coating materials and the mechanical and dynamic mechanical properties of W-cured films were studied. The refractive index of viscose UV-curable coating material increased with increasing hard segment component (HD) content. The TDI based system has higher refractive index than that of IPDI based system at the same composition. As the content of HD increased, the Young's modulus, ultimate tensile strength, and dynamic storage modulus of UV-cured films of both TDI and IPDI based systems increased, however, the elongation at break decreased. The glass transition temperature of leV-cured films of both TDI and IPDI based systems increased as the content of HD increased.

Effects of low molecular weight Diols as Chain Extender on the Mechanical Properties of HTPB Urethane Elastomers (저분자량 디올이 체인 연장제로서 HTPB 우레탄 탄성 중합체의 기계적 성질에 미치는 영향)

  • Myong Pyo Hong;Man Gyoon No;Yong Joon Kim
    • Journal of the Korean Chemical Society
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    • v.27 no.1
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    • pp.58-65
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    • 1983
  • The mechanical properties (tensile strength, 100% modulus and hardness) of the urethane elastomers prepared from hydroxyl terminated polybutadiene (HTPB), several low molecular weight diols (ethylene glycol, 1, 3-propane diol, 1,4-butane diol, 1,5-pentane diol and 1,6-hexane diol) and two kinds of diisocyanates(TDI: toluene diisocyanate, IPDI: isophorone diisomechanical properties were enhanced for the increases of the concentrations of the urethane group, as predicted. In case of TDI, when the mechanical properties of the elastomers were plotted patterns were observed, which can be explained by hydrogen bondings depending on the number of the methylene carbons. But the mechanical properties of the elastomers derived from IPDI had decreasing curves against the number of methylene carbons in low molecular weight diols, without the characteristic zigzag patterns.

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Effect of Chemical Structure on the Properties of UV-cured Polyurethane Acrylates Films

  • Kwon, Ji-Yun;Yoo, Hye-Jin;Kim, Han-Do
    • Fibers and Polymers
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    • v.2 no.3
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    • pp.141-147
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    • 2001
  • The effect of compositions of isophorone diisocyanate (IPDl)/4.4'-diphenylmethane diisocyalate (MDI) and polypropylene oxide diol (PPG, $M_w$: 3000)/1,4-butane diol (BD) on the properties of UV-cured polyurethane acrylate films based on 2-hydroxyethyl acrylate (HEA) was examined. UV-curable polyurethane acrylates were formulated from the prepolymer. trimethylol propane triacrylate (TMPTA) as a reactive diluent, and 1-hydroxycyclohexyl ketone (Irgacure 184) as a photoinitiator. Dynamic mechanical thermal properties and elastic properties of UV-cured polyurethane acrylates was fecund to depend on the chemical composition of IPDl/MDl and PPG/BD. As the BD content increased, the tensile storage modulus of all series samples increased significantly. The storage modulus increased in the order of samples A (IPDI based samples)> samples B (IPDI/MDl (7/3 molar ratio) based samples) > samples C (IPDI/MDl (5/5 molar ratio) based samples at the same composition. Two distinct louts modulus peaks for all samples are observed owing to the softs segment glass transition temperature ($T_gh$) and hard segment glass transition temperature ($T_gh$). The difference between $T_gh$, and $T_gh$, (Δ$T_g$) increases in the order of A > B > C at the same composition. In cycle test, the initial onset strain (%) was found to decrease with increasing BD content in PPG/BD and with increasing MDI content in IPDI/MDl.

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Preparation and Characterization of Polyurethane Flame Retardant Coatings Using Trichloro Lactone Modified Polyesters/IPDI-Isocyanurate (트리클로로 락톤 변성폴리에스테르/IPDI-Isocyanurate를 사용한 폴리우레탄 난연도료의 제조 및 특성)

  • Park, Hong-Soo;Jo, Hye-Jin;Shim, Il-Woo;Yang, In-Mo;Kim, Seung-Jin
    • Journal of the Korean Applied Science and Technology
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    • v.23 no.3
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    • pp.252-263
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    • 2006
  • It is attempted to develop flame retardant polyurethane coatings, which have received significant attention in recent years. It is the purpose of this study to synthesize new reactive polyurethane coatings containing halogen. Lactone based modified polyester polyols, using trichlorobenzoic acid as chlorine moiety (TBAOs) were synthesized. These polyesters were cured with isophorone diisocyanate (IPDI)-isocyanurate at room temperature (TBAPUs). Physical properties of these flame retardant coatings were similar with those of non-flame retardant coatings. The flammability of coatings was strongly dependent on the chlorine contents. We found that the increasing chlorine contents showed better flame retarding properties and that, however, they also resulted in more smog generation during combustion. The detailed results of flammability test using various methods indicated $24{\sim}26%$ in LOI and $3.7{\sim}5.3\;cm$ char length in $45^{\circ}$ Meckel burner method.

Preparation and Flame-Retardant Optimization of PU Coatings Using Chlorine-Containing Modified Polyester/IPDI- Isocyanurate

  • You, Hyuk-Jae;Shim, Il-Woo;Jo, Hye-Jin;Park, Hong-Soo;Kim, Seung-Jin;Kim, Young-Geun
    • Journal of the Korean Applied Science and Technology
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    • v.22 no.1
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    • pp.1-8
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    • 2005
  • Chlorine-containing modified polyester polyols were synthesized by two-step condensation reactions. Intermediate was synthesized by the esterification of monochloroacetic acid with trimethylolpropane in the first step. Polycondensation of the intermediate (MCAOs), 1,4-butanediol, and trimethylolpropane with adipic acid was carried out. Two-component polyurethane (PU) coatings were prepared by blending MCAOs and IPDI-isocyanurate. There new flame-retardant coatings showed various properties comparable to other non-flame-retardant coatings. They were superior to flammable coatings from the experimental results showing rapid and 10 to 13 hours of pot-life. Coatings with 30wt% monochloroacetic acid was not flammable by the vertical flame retardancy test.

Study on Adhesion and Mechanical Properties of Adhesive Resin Using Microcapsule with Isocyanate Compound (이소시아네이트를 포함하는 Microcapsule을 사용한 접착수지의 특성에 관한 연구)

  • Kim, Dong Ho;Kim, Gu Ni
    • Journal of Adhesion and Interface
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    • v.15 no.3
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    • pp.109-115
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    • 2014
  • In this study, we synthesized and identified microcapsule containing isocyanate, and investigated the mechanical and adhesion properties of polyurethane resin by adding microcapsule. We found out that the core material of microcapsule and the component weight fraction of microcapsule from the FT-IR and TGA analysis. From the results of adhesion and mechanical property tests, we confirmed that in case of using microcapsule for adhesive resin composition, adhesion strength, tensile strength and abrasion were improved by cross-linking reaction between urethane and IPDI in microcapsule.

A Study on the Synthesis and Properties of Environmental Friendly Pressure Sensitive Adhesive for Manufacturing Electronic Products (전자제품 제조용 친환경 점착제의 합성과 물성에 대한 연구)

  • Cho, Ur Ryong;Oh, Ji Hwan;Kim, Ji Hyun;Jung, Hyeon Jeong
    • Journal of the Semiconductor & Display Technology
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    • v.15 no.1
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    • pp.12-16
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    • 2016
  • Toluene-free pressure sensitive adhesives were synthesized by using butyl acrylate (BA), 2-hydroxy ethyl acrylate, methyl methacrylate, acrylic acid (AA) as monomers and ethyl acetate as a solvent. The polymerization recipes were designed by changing 1, 3, 5 part per hundreds monomer (phm) of AA content on the basis of 100 BA parts. Two crosslinking agents, ethyl glycol diglycidyl ether (EDGE) and isophorone diisocyanate (IPDI) were added to the synthesized polymers to increase adhesion due to crosslinking. In the measurement of properties, holding power, peel strength, and initial tackiness increased with AA content due to crosslinking between carboxyl group in AA and epoxy group in EDGE and isocyanate group in IPDI. In the comparison of two crosslinking agents, EDGE showed better in the three properties than IPDI by better reaction of epoxy group of EDGE to carboxyl group of AA.

Synthesis and Characterization of UV Curable Oligomers for Dual-crosslinking Systems (이중 경화를 위한 자외선 반응형 올리고머의 합성 및 특성 분석)

  • You, Ryong;Lee, Seo-Ho;Park, Won Ho
    • Textile Science and Engineering
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    • v.52 no.4
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    • pp.264-271
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    • 2015
  • In this study, acrylic resin-based ultraviolet curable oligomers were synthesized for a dual-crosslinking system applicable to thermosetting pressure-sensitive adhesives (PSAs). In addition, dual-curable PSA tapes were prepared by blending thermoset PSAs and UV curable oligomers. UV curable oligomers were synthesized using acrylate monomers, isophorone diisocyanate (IPDI), and propylene imine (PI). Acrylate monomers were added at a constant rate to IPDI for selective bonding to a single isocyanate group of IPDI, and a polymerization inhibitor was added to prevent polymerization. Additionally, the binding sites that were bonded to the adhesive backbone were formed by adding PI at a constant rate, after solvent addition. The synthesized UV oligomers were confirmed by ATR-FTIR spectroscopy and 1H NMR, and then the adhesive properties of the PSA tapes prepared by blending thermoset PSAs and UV curable oligomers were measured.

Chemical Structure Effect of Diisocyanate on the Coating Performance of Polyurethane-based Gel-coats

  • Park, Jin Hwan;Baek, Seung-Suk;Kim, Oh Young;Hong, Seheum;Park, Dong Hyup;Hwang, Seok-Ho
    • Elastomers and Composites
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    • v.54 no.1
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    • pp.30-34
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    • 2019
  • Four different diisocyanates (IPDI; isophorone diisocyanate, HDI; hexamethylene diisocyanate, HMDI; dicyclohexylmethane-4,4'-diisocyanate, and XDI; m-xylylene diisocyanate) were used to prepare polyurethane gel-coats, and the weatherabilities, physical properties, and surface characteristics of the gel-coats were investigated with respect to the chemical structure of the diisocyanates. The weathering test results indicated that all of the diisocyanates used in this study were suitable for use in the preparation of the polyurethane gel-coat. However, the set-to-touch times and physical properties of the polyurethane gel-coat indicated that the cycloaliphatic diisocyanate (IPDI and HMDI) were ideal for the preparation of polyurethane gel-coats.