• Title/Summary/Keyword: Flame retardancy

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Synthesis of (2, 3-Dibromopropyl)Phenyl Octadecanoyl Phospate and Its Application as Softening Flame Retardant ((2,3-Dibromopropyl)Phenyl Octadecanoyl Phosphate 합성과 유연난연제로서의 응용)

  • Park, Hong-Soo
    • Applied Chemistry for Engineering
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    • v.3 no.4
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    • pp.670-677
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    • 1992
  • (2, 3-Dibromopropyl) phenyl phosphate[DPP] was synthesized from 2, 3-dibromopropyl alcohol and chlorophenyl phosphate. Also, (2, 3,-dibromopropyl)phenyl octadecyl phosphate[DPOP] was synthesized from DPP and n-octadecyl chloride. Flame retardants, DPPF and DPOPF, were prepared by blending DPP and DPOP with emulsifier, respectively. The flame retardants prepared were o/w(oil in water) type emulsion flame retardants. As a result of treatments of the flame retardants on various synthetic textiles, DPPF showed only good flame retardancy, but DPOPF showed both good flame retardancy and good softness.

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Flame Retardancy of Polypropylene/Montmorillonite Nanocomposites (폴리프로필렌/몬모릴로나이트 나노복합체의 난연성)

  • Lee Sung-Goo;Won Jong Chan;Lee Jae-Heung;Choi Kil-Yeong
    • Polymer(Korea)
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    • v.29 no.3
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    • pp.248-252
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    • 2005
  • PP/MMT nanocomposites having a various compositions were prepared by melt blending with a twin screw extruder. In this study, maleic anhydride-grafted PP (MAH-g-PP) was used as a compatibilizer in order to assist the exfoliation or hen in the pp matrix. from the results or x-ray diffraction (XRD) and transmission electron microscope (TEM) measurements for the nanocomposites, we confirmed that MMT was exfoliated. PPM nanocomposites have shown good flame retardancy by synergistic effect between MMT and flame retardant. The mechanical and thermal properties of the nanocomposites showed significant enhancement compared with those of neat PP, The excellent flame retardancy of the PP/MMT nanocomposites, UL94 V-0 value, was successfully obtained with reduced amount of the flame retardant.

Study on Flame Retardancy and Thermal Resistance Properties of Phenolic Foam and Polyurethane Foam (페놀 폼과 폴리우레탄 폼의 난연 및 내열성 연구)

  • Lee, Ju-Chan;Seo, Jung-Seok;Kim, Sang Bum
    • Journal of the Korean Institute of Gas
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    • v.17 no.1
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    • pp.35-41
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    • 2013
  • In this study, flame retardancy of polyurethane foam and phenolic foam were investigated by addition of phosphorous flame retardants. The thermal degradation behavior of polyurethane foam and phenolic foam in the presence of flame retardants has been studied by thermogravimetric analysis(TGA). Heat release rate(HRR), mean HRR, mass loss rate(MLR), total smoke released(TSR) and limited oxygen index(LOI) were tested by cone calorimeter. From the test results, Phenolic foam showed low HRR, MLR and TSR than polyurethane foam.

Flame Retardant Finish of PET fabrics with Bis-(p-bromophenyl) phosphate (Bis-(p-bromophenyl)phosphate에 의한 PET 직물의 방염가공)

  • Cho, Hwan;Choi, Chang-Ho;Lee, Kwang-Woo;Cho, In-Sool;Kim, Soo-Chang;Heo, Man-Woo
    • Textile Coloration and Finishing
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    • v.2 no.4
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    • pp.251-256
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    • 1990
  • Bis-(p-bromopheny)phosphate(BBPP) , which serves as flame retardant for PET fabric, was synthesized from phenol and phosphorus oxychloride, and from bromine. In order to investigate the flame retardancy of BBPP, PET fabrics were steam-cured with diluted BBPP solution. The following conclusions were drawn : 1. Flame retardancy of PET fabrics treated with BBPP was excellent, and optimal treating condition was 10% concentration of flame retardant at $170^{\circ]C$ 2. Clark softness and tensile strength before and after the laundering of PET fabrics treated with flame retardant remained nearly unchanged.

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Synthesis of a Novel Nitrogen-Phosphorus Flame Retardant Based on Phosphoramidate and Its Application to PC, PBT, EVA, and ABS

  • Nguyen, Congtranh;Kim, Jin-Hwan
    • Macromolecular Research
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    • v.16 no.7
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    • pp.620-625
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    • 2008
  • A novel nitrogen-phosphorus compound, diphenyl piperazine-1,4-diylbis(methylphosphinate)(DPPMP) was synthesized via a two step reaction and its flame retarding efficiency as a single component additive was investigated. The success of synthesis was confirmed by FTIR and $^1H$ and $^{31}P$ NMR analysis. The product was mixed with polycarbonate (PC), poly(butylene terephtalate) (PBT), ethylene-vinyl-acetate copolymer (EVA), and acrylonitrile-butadiene-styrene copolymer (ABS). The flame-retarding efficiency was evaluated using the limiting oxygen index (LOI) and the UL-94 vertical test methods. The addition of DPPMP enhanced the flame retardancy of the polymers and the V-0 ratings were obtained for the polymers examined in this study at a loading of 7-30 wt%. The gas-phase flame retardancy mode of action was suggested for this material from the thermogrametry experiment results.

Preparation and Flame-Retardant Optimization of PU Coatings Using Pyrophosphoric Modified Polyester/HDI-Biuret (피로포스포릭 변성폴리에스테르/HDI-Biuret에 의한 PU 난연도료의 제조 및 난연최적화)

  • Shin, Dong-Il
    • Journal of the Korean Applied Science and Technology
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    • v.20 no.2
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    • pp.110-117
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    • 2003
  • Pyrophosphoric modified polyesters (TATBs) were synthesized by polycondensation of adipic acid, trimethylolpropane, 1,4-butanediol, and tetramethylene bis(orthophosphate). Two-component PU flame-retardant coatings (TATBCs) were prepared by blending TATBs with HDI-Biuret. Most of the physical properties of the flame-retardant coatings were comparable to those of non-flame-retardant coatings. Coatings containing 10 and 15wt% 1,4-butanediol, TATBC-10C and TATBC-15C were not flammable in the vertical flame-retardancy test.

Preparation & Properties of the Flame Retarded NBR Foams with Phosphorus/Nitrogen-Containing Flame Retardants (인/질소계 난연제를 포함한 난연 NBR 발포체의 제조 및 특성)

  • Jo, Byung-Wook;Moon, Sung-Chul;Choi, Jae-Kon
    • Elastomers and Composites
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    • v.39 no.2
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    • pp.105-120
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    • 2004
  • The flame retarded NBR foams were prepared with metal hydroxides and various phosphorus/nitrogen-contain ing flame retardants. The dependency of the phosphorus content on thermal properties, flame retardancy, smoke density, and foaming properties were investigated in the foams. Foaming properties and morphology of the flame retarded NBR foams with P/N flame retardants( ${\le}10 phr$) were similar to those of the foams without P/N ones but containing metal hydroxides The flame retardancy of the foams was improved with increasing the phosphorus content and char formation under combustion atmosphere. The cone-calorimeter test and LOI index were also coincided with the TGA analysis quite well. The heat release rate (HRR), total heat release (THR), and effective heat of combustion (EHC) were decreased, whereas the carbon monoxide yield was increased with increase of the phosphorus content of P/N flame retardant. The smoke density values were closely related with CO yield values obtained by the cone-calorimeter test due to the high and hard char formation.

Preparation and Flame Retardancy Effect of Polyurethane Coatings Containing Phosphorus and Chlorine (인과 염소를 함유하는 폴리우레탄 도료의 제조와 난연효과)

  • Shim Il-Woo;Jo Hye-Jin;Park Hong-Soo;Kim Seong-Kil;Kim Young-Geun
    • Polymer(Korea)
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    • v.30 no.3
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    • pp.238-246
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    • 2006
  • The aim of this study is to enhance the flame retardancy by the synergism effect of chlorine and phosphorus groups. The flame-retardant polyurethane coatings containing chlorine and phosphorus compounds were synthesized. After synthesizing the intermediate products of tetramethylene bis (orthophosphate) (TMBO) and neohexanediol trichlorobenzoate (TBA-adduct), the condensation polymerization was performed with four different monomers of two intermediates, 1,4-butanediol, and adipic acid to obtain four-component copolymer(TTBA). The two-component flame-retardant polyurethane coatings (TTBA-10C/HDI-trimer=TTHD-10C, TTBA-20C/HDI-trimer=TTHD-20C, TTBA-30C/HDI trimer=TTHD-30C) were obtained by curing reaction at room temperature with the synthesized TTBAs and hexamethylene diisocyanate (HDI)-trimer as a curing agent. The obtained TTHDs were made into coating samples and used as test samples for various physical properties. The physical properties of the flame-retardant coatings containing chlorine and phosphorus groups were generally inferior to those containing only phosphorus group. Flame retardancy was tested by vortical and horizontal combustion method, and $45^{\circ}$ Meckel burner method. Since the retardancy of flame-retardant coatings containing chlorine and phosphorus groups was better than that containing only phosphorus group, it could be concluded that the retardancy by the synergism effect of chlorine and phosphorus groups exhibited.

Flame Retardancy and Thermal Properties of PVC/ATH Composites Prepared by a Modular Intermeshing Co-rotating Twin Screw Extruder

  • Lee, Hyeongsu;Park, Se-Ho;Lee, Jae-Yeul;Park, Yuri;Jeong, Hobin;Jhee, Kwang-Hwan;Bang, Daesuk
    • Elastomers and Composites
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    • v.51 no.2
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    • pp.147-153
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    • 2016
  • Polyvinyl chloride (PVC) has been used as a general-purpose polymer because of its lower cost, good durability and mechanical properties compared to other materials. However, PVC is vulnerable to heat deformation and generates a toxic gas like hydrogen chloride. Therefore, it is important to delay or prevent the flame retardancy and thermal degradation of the PVC during the processing. It was reported that aluminum trihydroxide (ATH) improved flame retardancy as well as smoke inhibition of the virgin polymer. In this study, PVC composites by addition of ATH were compounded in a modular intermeshing co-rotating twin screw extruder. The PVC composites with different concentrations of ATH (0~5 phr) were analyzed. Flame retardancy of the PVC composite significantly increased depending on the ATH concentration. LOI of the composite also increased with the concentration of ATH. There were no significant differences for the thermal properties of the PVC composites with ATH.

Effect of Waste Ground Tire Rubber on Flame Retardancy and Foaming Properties of the NBR foams (폐타이어 고무분말(GTR)이 니트릴고무(NBR) 발포체의 난연 및 발포 특성에 미치는 영향)

  • Moon, Sung-Chul;Lee, Jae-Chul;Choi, Jae-Kon;Jo, Byung-Wook
    • Elastomers and Composites
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    • v.38 no.3
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    • pp.251-261
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    • 2003
  • The flame retardancy and foaming properties of NBR foams containing waste ground tire rubber (GTR) were studied. When the composition ratios of NBR/GTR were ranged in $100/0{\sim}80/20$ (w/w) and rubbers/flame retardants were in the range of $1/1.95{\sim}3.70 wt%$, the considerably optimized foam for flame retardancy was obtained with high limiting oxygen indices (LOI, $29.4{\sim}40.0$), low heat release rate(HRR), closed/semi-closed cell of uniformity, and reasonable expandability ($215{\sim}300 %$). The LOI was increased and the heat release rate was decreased with increasing the amount of GTR content.