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PUR-PIR foam produced based on poly(hydroxybutyl citrate) foamed founded with different factories

Abstract

A poly(hydroxybutyl citrate) p(HBC) was obtained. The product compound produced in the solution during esterification, was added to rigid polyurethane-polyisocyanurate foams (PUR-PIR). The amount of petrochemical polyol in the foams was decreased in favor of the p(HBC) from 0.1 to 0.5 equivalent. The foams were foamed in two ways: with distilled water (W foams) and with Solkane 365/227 (S foams). The examination results of both foam series were compared. They showed that the foams foamed with water have higher softening temperature than the foams foamed with solkane. The retention values for both foam series are around 91–95%, and water absorption in the range of 0.7–3.2%. The anisotropy coefficient did not exceed 1.08 (the lowest value being 1.01).

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Different catalysts for new polyols for rigid PUR-PIR foams

Abstract

New polyols were synthesized with 2-hydroxypropane-1.2.3-tricarboxylic acid and butane-1,4-diol (1.4-BD). The synthesis was performed using different catalysts in the amount of 0.1%. Used catalyst: Tyzor TPT, tin(II) acetate, sulfuric(IV) acid. The fourth reaction was conducted without the use of a catalyst. The polyols’ properties were evaluated with regards to the usefulness in rigid polyurethane-polyisocyanurate (PUR-PIR) foams (acid value, density, pH and solubility, FTIR spectra). Based on the research, it was evaluated that only the polyol synthesized using Tyzor TPT (E6) was useful in production of rigid PUR-PIR foams. Its hydroxyl number was 496 mgKOH/g and its viscosity was about 14 552 mPa · s. A series of five foams P6.1–P6.5 was produced with this polyol. Rigid foams test results indicated that the amount of this compound in the foam substantially affects its compressive strength, density and their retention. The foams have low brittleness values.

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Textile-Reinforced Concrete Structural Elements

Tragwerken (CTRS4) und zur 1. Anwendertagung, T. U. Dresden, Germany, 2009, 565–576. [10] Chira A., Kumar A., Vlach T., Laiblová L., Škapin A. S., Hájek P.: Property improvements of alkali resistant glass fibres/epoxy composite with nanosilica for textile reinforced concrete applications . Materials & Design, 89. (2016) 146–155. https://doi.org/10.1016/j.matdes.2015.09.122 [11] Chira A., Kumar A., Vlach T., Laiblová L., Hajek P.: Textile-reinforced concrete facade panels with rigid foam core prisms . Journal of Sandwich Structures & Materials, 18/2. (2016

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Rigid Polyurethane Foam Thermal Insulation Protected with Mineral Intumescent Mat

Testing, 24(5), 607-612. [28] Lifeng Wu, Gemert J., Camargo R.E. (2012), Rheology Study in Polyurethane Rigid Foams. Huntsman International Technical presentations Web site: http://www. huntsman.com/polyurethanes/a/Products/Technical%20 presentations%20overview [29] Prociak A. (Ed.), Rokicki G.. (Ed.), Ryszkowska J. (Ed.). (2014). Materialy poliuretanowe. Wydawnictwo Naukowe PWN SA (Warsaw). [30] Levchik S.V., Weil E.D. (2004), Review Thermal decomposition, combustion and fire-retardancy of polyurethanes-a review of the

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