Caracterizacion Del Curado De Resinas Urea Formaldehido Por Calorimetría Diferencial De Barrido (Dsc)

Lisperguer, Justo; Droguett, Cynthia

doi:10.4067/s0366-16442002000100007

Cited by 6 publications

(3 citation statements)

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“…The presence of residue free formaldehyde is another disadvantage of this family of resins. Recently, urea has been introduced into PF resins to improve their curing, to lower the content of free formaldehyde, and to reduce the cost of the resin 2–19. To develop practical uses of so‐called phenol–urea–formaldehyde (PUF) resins, it is necessary to introduce cocondensation between phenol and urea at the time of resin preparation 7…”

Section: Introductionmentioning

confidence: 99%

Crossing CTOs—The tips, tricks, and specialist Kit that can mean the difference between success and failure

Godino

Sharp

Carlino

et al. 2009

Cathet Cardio Intervent

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Percutaneous coronary intervention (PCI) for chronic total occlusions (CTO) remains one of the major challenges in interventional cardiology. The appropriate use of the rapidly increasing range of tools available to interventional cardiologists is bringing more and more CTOs into the 'treatable' category. The bar has now been raised to 80% success rates by some expert operators around the world, which, in our view, cannot be achieved without a thorough understanding of technique and technical know-how. CTO procedures are increasingly becoming a sub-specialist field within interventional cardiology and we would encourage centers to consider appointing 'super-specialists' who are able to concentrate experience and expertise in this area. In this paper we detail the principal characteristics of the over the wire balloons, microcatheters and guidewires at present available, the most popular and recent of which are listed in Table 1 and 2. The knowledge and the specific choice of these materials and the criteria for selection of your guidewire or microcatheter can mean the difference between success and failure. Moreover, we discuss on the most important and groundbreaking techniques to approach a CTO. Finally, considering the greater risk of coronary perforation related to a CTO procedure compared to routine PCI, we describe which are best strategy and devices for treating coronary perforations and other major complications.

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Section: Introductionmentioning

confidence: 99%

Crossing CTOs—The tips, tricks, and specialist Kit that can mean the difference between success and failure

Godino

Sharp

Carlino

et al. 2009

Cathet Cardio Intervent

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“…Recently, urea has been introduced into PF resins to improve their curing, to lower the content of free formaldehyde, and to reduce the cost of the resin. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] To develop practical uses of so-called phenolurea-formaldehyde (PUF) resins, it is necessary to introduce cocondensation between phenol and urea at the time of resin preparation. 7 One of the most used procedures for PUF synthesis is the two-step polymerization process, by which the trimethylolphenol (TMeP) is formed in the first step.…”

Section: Introductionmentioning

confidence: 99%

Characterization of phenol–urea–formaldehyde resin by inline FTIR spectroscopy

Poljanšek¹,

Šebenik²,

Krajnc³

2005

J of Applied Polymer Sci

131

136

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Phenol-urea-formaldehyde (PUF) resins were synthesized by a two-step polymerization process. The first step was the synthesis of 2,4,6-trimethylolphenol (TMeP) from phenol and formaldehyde, under alkaline conditions. In the second step PUF resins were synthesized by the reaction of TMeP with urea, under acidic and alkaline conditions. The influence of temperature on the synthesis of TMeP was investigated. The molar ratio between TMeP and urea was varied to study the composition effect on the second step of the PUF synthesis and final product properties. Synthesis of TMeP and PUF resins were monitored by inline FTIR-ATR system. Analytical methods, such as differential scanning calorimetry, nuclear magnetic resonance, thermogravimetric analysis, and infrared spectroscopy were used for characterization of TMeP and PUF resins. Obtained PUF resins were cured and tested on flexural strength.

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“…Para determinar la calidad de las resinas alquídicas obtenidas se fabricaron productos de interés comercial en la línea de los recubrimientos tales como lacas y selladores catalizados al ácido empleando formulaciones típicas de empresas locales (ver tabla 3.) (Ayca, et al 2010;Lisperguer, et al 2002). Las materias primas se mezclan durante 1 hora empleando agitación con disco Cowles hasta alcanzar una completa homogenización del sistema.…”

Section: Fabricación De Las Resinas Alquídicas Vía Glicerólisis De Lounclassified

LACAS Y SELLADORES PARA MADERA A PARTIR DE RESINAS ALQUÍLICAS OBTENIDAS DE ACEITES DE HIGUERILLA, PALMA y USADOS DE FRITURA

et al. 2014

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Se presentan resultados de la elaboración de lacas y selladores para madera a partir de resinas alquídicas empleando aceites autóctonos crudos de higuerilla, palma y de fritura para reemplazar aceites importados como el de soja. Los productos desarrollados fueron caracterizados mediante criterios de desempeño tales como brillo, viscosidad, adherencia al sustrato, estabilidad térmica y tiempos de secado, bajo normas nacionales e internacionales, con el fin de determinar similitud o cambios con respecto a contratipos comerciales. El desarrollo plantea la inclusión de este tipo de materias primas, autóctonas de la región, como una alternativa para reducción de costos, generación de empleos directos e indirectos y la incorporación de estos aceites vegetales de bajo valor comercial en la cadena productiva de recubrimientos para madera. Además se da valor agregado a los aceites recuperados de fritura convirtiéndolos en una materia prima de interés comercial y minimizando su impacto ambiental en cuerpos de agua.

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Caracterizacion Del Curado De Resinas Urea Formaldehido Por Calorimetría Diferencial De Barrido (Dsc)

Cited by 6 publications

References 0 publications

Crossing CTOs—The tips, tricks, and specialist Kit that can mean the difference between success and failure

Crossing CTOs—The tips, tricks, and specialist Kit that can mean the difference between success and failure

Characterization of phenol–urea–formaldehyde resin by inline FTIR spectroscopy

LACAS Y SELLADORES PARA MADERA A PARTIR DE RESINAS ALQUÍLICAS OBTENIDAS DE ACEITES DE HIGUERILLA, PALMA y USADOS DE FRITURA

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