Phthalate acid esters (PAEs) are a class of chemical compounds widely used in different industrial applications, mainly as plasticizers for polyvinyl chloride (PVC) resins, adhesives and cellulose film coatings and with minor applications in cosmetics, medical products and insecticide carriers. [ Links ], 20. [ Links ], 3. The molecular structure of the polyesters is strongly influenced by the molar ratio between the monomers. [ Links ], 18. 12. http://www2.basf.de/basf2/html/plastics/englisch/pages/konstr/ultradu.htm#sub02 (accessed on 08/11/2006). Adipic acid based polyester polyols are used in applications where flexibility is wanted, as in flexible foams and elastomers. Chrissafis K, Paraskevopoulos KM, Bikiaris, DN. Phthalic acid is an aromatic dicarboxylic acid, with formula C 6 H 4 (CO 2 H) 2.It is an isomer of isophthalic acid and terephthalic acid.Although phthalic acid is of modest commercial importance, the closely related derivative phthalic anhydride is a commodity chemical produced on a large scale. Scanning electron microsocopy (SEM). 2. Keywords: polyester, glycerol, phthalic acid. 1. 11. http://www.degussa-hpp.com/eng/products/hpp/vestodur.shtml (accessed on 08/11/2006). ¤To whom correspondence should be addressed. [ Links ], 21. A benzenedicarboxylic acid that is benzene substituted by carboxy groups at position 1 and 3. 1,4-Benzenedicarboxylic acid. These iso phthalic acid are of Grade A quality and come in a liquid-like appearance. These aromatic dicarboxylic acids are used as precursors (in the form of acylchlorides) to commercially important polymers. The X ray patterns were collected on a Shimadzu XRD-600 diffractometer, with Cu-Ka radiation (l = 1.54 Å), 30 kV potential and 20 mA current. 2005; 251(1):29-41. Saur K, Fava JA, Spatari S. Life cycle engineering case study: Automobile fender designs. Anal Chim Acta 808:94–103 Google Scholar. [ Links ], 19. Synthesis and characterization of polyesters derived from glycerol and phthalic acid, Danilo Hansen GuimarãesI; Michel de Meireles BrioudeI; Raigens da Paz FiúzaI; Luis Antônio Sanches de Almeida PradoII; Jaime Soares BoaventuraI; Nadia Mamede JoséI, *, IPrograma de Pós-graduação de Engenharia Química, Instituto de Química, Universidade Federal da Bahia, Campus de Ondina, 40170-290 Salvador - BA, Brasil IIInstitute of Polymer and Composites, Technische Universität Hamburg, Harburg. The authors acknowledge FAPESB (Fundação de Amparo à Pesquisa do Estado da Bahia) for the financial and technical support given to this work. Differential scanning calorimetry (DSC). The largest markets for phthalic anhydride are phthalate plasticizers, unsaturated polyester resins, and alkyd resins for surface coatings. Pretorius NO, Rode K, Simpson JM, Pasch H (2014) Analysis of complex phthalic acid based polyesters by the combination of size exclusion chromatography and matrix-assisted laser desorption/ionization mass spectrometry. Derivatives of phthalic anhydride are used in a broad spectrum of industries such as paints & coatings, automotive, electronics, electrical, building & construction, and other. The main degradation mechanism of polyesters having high molecular weight is the formation of alkenes, through b-elimination24-27, the trans-esterification and the rearrangements involving the end-groups play also a decisive role on the thermal stability of polyesters28. One of three possible isomers of benzenedicarboxylic acid, the others being phthalic and terephthalic acid s. 7. http://www.engr.wisc.edu/news/headlines/2003/Mar10.html (accessed on 08/11/2006). Create . (NTP, 1992) CAMEO Chemicals. [ Links ], 10. Shell Internationale Research Maatschappij B.V. National Starch And Chemical Investment Holding Corporation, AL PAYMENT 20020507;LT PAYMENT 20020507;LV PAYMENT 20020507;MK PAYMENT 20020507;RO PAYMENT 20020507;SI PAYMENT 20020507, AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE, LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT. Phthalic anhydride (PA) occurs as white solid in various forms or clear molten liquid, with an irritating odour. Paper Synthesis of unsaturated polyester resin — effect of anhydride composition ABDEEN AHAMAD, MARY … Description: Poly-Glass™ reinforced polyester resin is a chemically resistant isophthalic polyester formulated specifically for lining the bottoms of steel storage tanks used to contain crude oil and a wide range of refined petroleum products including lubricants, heating oil, diesel . The use of glycerol as a source for hydrogen has the additional advantage of producing a valuable commodity from a by-product of biodiesel production. … The polycondensation between phthalic acid and glycerol produced new polyester with good thermal stability at temperatures lower than 200 °C. [ Links ], 27. It is a white crystalline solid subliming at 345°C. About 35% of the isophthalic acid is used to prepare unsaturated polyester resins, about 30% is used to produce alkyd coatings, and over 20% is used in other types of polymers, primarily as a minor comonomer with terephthalic acid in saturated polyesters. Zorba T, Chrissafis K, Paraskevopoulos KM, Bikiaris, DN. Chemical resistance of Polyester to products like Acetic acid, Diesel oil and others Sponsored Links Polyester resins combine excellent mechanical, electrical and thermal properties with very good chemical resistance and dimensional stability. A polymeric material - Phthalic acid propane-1,2 diol-glycerol co-polyester (PPGC) was synthesized from Polyester resins based on ortho-phthalic acid and polyhydric alcohols, such as glycerin and pentaerythritol, are widely used; these are called glyptal and penta resins, respectively. 2004-09-16 . 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