Cross-Reactivity Among Epoxy Acrylates and Bisphenol F Epoxy Resins in Patients With Bisphenol A Epoxy Resin Sensitivity

2002 ◽  
Vol 13 (3) ◽  
pp. 108-115
Author(s):  
Han N. Lee ◽  
Christopher D. Pokorny ◽  
Sandra Law ◽  
Melanie Pratt ◽  
Denis Sasseville ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Epoxy Resin ◽  
Epoxy Resins ◽  
Cross Reactivity ◽  
Bisphenol F

Cross-Reactivity Among Epoxy Acrylates and Bisphenol F Epoxy Resins in Patients With Bisphenol A Epoxy Resin Sensitivity

Dermatitis ◽  
2002 ◽  
Vol 13 (3) ◽  
pp. 108-115 ◽  
Author(s):  
Han N. Lee ◽  
Christopher D. Pokorny ◽  
Sandra Law ◽  
Melanie Pratt ◽  
Denis Sasseville ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Epoxy Resin ◽  
Epoxy Resins ◽  
Cross Reactivity ◽  
Bisphenol F

scholarly journals Sustainable access to fully biobased epoxidized vegetable oil thermoset materials prepared by thermal or UV-cationic processes

RSC Advances ◽  
2020 ◽  
Vol 10 (68) ◽  
pp. 41954-41966 ◽  
Author(s):  
Samuel Malburet ◽  
Chiara Di Mauro ◽  
Camilla Noè ◽  
Alice Mija ◽  
Marco Sangermano ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Epoxy Resin ◽  
Vegetable Oil ◽  
Epoxy Resins ◽  
Diglycidyl Ether

Beyond the need to find a non-toxic alternative to DiGlycidyl Ether of Bisphenol-A (DGEBA), the serious subject of non-epichlorohydrin epoxy resins production remains a crucial challenge that must be solved for the next epoxy resin generations.

Thermal and Dielectric Properties of Inorganic-Organic Nanocomposites Involving Epoxy Resin and Polyhedral Oligomeric Silsesquioxanes

2012 ◽  
Vol 476-478 ◽  
pp. 665-669 ◽  
Author(s):  
Li Yang ◽  
Miao Yin ◽  
Xiu Yun Li ◽  
Han Bing Ma
Keyword(s):  
Thermal Stability ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Bisphenol A ◽  
Epoxy Resin ◽  
Functional Groups ◽  
Epoxy Matrix ◽  
Epoxy Resins ◽  
Diglycidyl Ether ◽  
Polyhedral Oligomeric Silsesquioxanes

In this paper, a type of nanoporous polyhedral oligomeric silisesquioxanes (POSS) containing eight functional groups have been synthesized and mixed with diglycidyl ether of bisphenol A (DGEBA) to form epoxy resin networks with nanostructures. The cured octa(aminophenyl) silsesquioxane (1c-POSS) and DGEBA system inherently possesses higher thermal stability and higher char yield than the control epoxy resins. Furthermore, the dielectric constant of the 1c-POSS/DGEBA material (4.36) is substantially lower than that of the neat epoxy resins (4.64) as a consequence the presence of nanoporous POSS cubes in the epoxy matrix.

CROSS REACTIVITY AMONG EPOXY ACRYLATES AND BIS-F BASED EPOXY RESINS IN PATIENTS WITH BIS-A EPOXY RESIN SENSITIVITY

Dermatitis ◽  
2001 ◽  
Vol 12 (2) ◽  
pp. 124
Author(s):  
Han Lee ◽  
Christopher Pokorny ◽  
Denis Sasseville ◽  
Melanie Pratt ◽  
Frances Storrs
Keyword(s):  
Epoxy Resin ◽  
Epoxy Resins ◽  
Cross Reactivity

scholarly journals Investigation of bisphenol a diglycidyl ether, bisphenol f diglycidyl ether and their hydroxy and chlorohydroxy derivatives stability in water-based food simulants

2004 ◽  
Vol 22 (SI - Chem. Reactions in Foods V) ◽  
pp. S272-S275
Author(s):  
I. Poustková ◽  
J. Dobiáš ◽  
J. Poustka ◽  
M. Voldřich
Keyword(s):  
Acetic Acid ◽  
Bisphenol A ◽  
Epoxy Resins ◽  
High Performance ◽  
Diglycidyl Ether ◽  
Phase Gradient ◽  
Bisphenol F ◽  
Food Simulants ◽  
Bisphenol A Diglycidyl Ether ◽  
Food Simulant

Varnishes used as the inner coatings of food cans are often based on epoxy resins or vinylic organosols. The epoxy resins can be produced from bisphenol A (BPA) and bisphenol F (BPF) and they also contain bisphenol A diglycidyl ether (BADGE) of bisphenol F diglycidyl ether (BFDGE) as stabilising components. These compounds may break down during storage and also by influence of food simulants. The stability of BADGE and BFDGE was studied using reverse-phase gradient high performance liquid chromatography (RP-HPLC) with fluorescence detection (FLD). Four experiments were compared: (i) BPA solution at the concentration 3 μg/ml of each food simulant, (ii) BADGE solution at the concentration 3 μg/ml of each food simulant, (iii) BFDGE solution at the concentration 3 μg/ml of each food simulant and (iv) mixture of all bisphenols solution at the concentration 3 μg/ml of each food simulant. Distilled water, 10% ethanol, 95% ethanol and 3% acetic acid were used as food simulants. It was observed that BPA, BADGE and BFDGE were most stabile in 95% ethanol and least stabile in 3% acetic acid. Creation of hydroxy and chlorohydroxy derivatives was in each food simulant different so it cannot be predicted.

scholarly journals Comparative Study on Toughening Effect of PTS and PTK in Various Epoxy Resins

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 518
Author(s):  
Woong Kwon ◽  
Minwoo Han ◽  
Jongwon Kim ◽  
Euigyung Jeong
Keyword(s):  
Fracture Toughness ◽  
Epoxy Resin ◽  
Tensile Properties ◽  
Epoxy Resins ◽  
Diglycidyl Ether ◽  
Low Molecular Weight ◽  
Bisphenol F ◽  
The Poor ◽  
Selection Of

This study investigated the toughening effect of in situ polytriazoleketone (PTK) and polytriazolesulfone (PTS) toughening agent when applied to various epoxy resins, such as diglycidyl ether of bisphenol A (DGEBA), diglycidyl ether of bisphenol F (DGEBF), and triglycidyl p-aminophenol (TGAP) with 3,3′-diaminodiphenylsulfone as a curing agent. The fracture toughness, tensile properties, and thermal properties of the prepared epoxy samples were evaluated and compared. When PTK was mixed with DGEBF, the fracture toughness was improved by 27% with 8.6% increased tensile strength compared to the untoughened DGEBF. When PTS was mixed with TGAP, the fracture toughness was improved by 51% without decreasing tensile properties compared to the untoughened TGAP. However, when PTK or PTS was mixed with other epoxy resins, the fracture toughness decreased or improved with decreasing tensile properties. This is attributed to the poor miscibility between the solid-state monomer of PTK (4,4′-bis(propynyloxy)benzophenone (PBP)) or PTS (4,4′-sulfonylbis(propynyloxy)benzene (SPB)) and the epoxy resin, resulting in the polymerization of low molecular weight PTK or PTS in epoxy resin. Therefore, the toughening effect of PTK or PTS can be maximized by the appropriate selection of epoxy resin based on the miscibility between PBP or SPB and the resin.

Effects of Graphene on a Resin Transfer Molding Process Using Bisphenol A Based Epoxy Resin

2010 ◽  
Vol 123-125 ◽  
pp. 535-538
Author(s):  
Huu Hieu Nguyen ◽  
Dae Woo Lee ◽  
Quang Trung Troung ◽  
Seong Woo Yun ◽  
Chi Hoon Choi ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Epoxy Resin ◽  
Polymer Composites ◽  
Epoxy Resins ◽  
Resin Transfer Molding ◽  
Analysis Tool ◽  
Molding Process ◽  
Liquid Resin ◽  
Transfer Molding ◽  
Computational Fluid Dynamics Analysis

Resin transfer molding is a popular process to fabricate polymer composites reinforced with a large amount of glass or carbon fibers. In general, fiber reinforcements are put in a mold, and a liquid resin such as epoxy resin is injected into the mold after preheating. For successful production of polymer composites via a resin transfer molding process, the filling and curing stages of the liquid resin as well as the mold design should be optimized. Recently, polymer composites reinforced with nanoparticles are attracting attention of researchers in academia and industries because efficient reinforcement can be achieved by small loading of nanoparticles such as carbon nanotubes and exfoliated clays. In this work, as an effort to develop light weight automotive parts, graphenes were investigated as a nano size reinforcement of epoxy resin for resin transfer molding. Graphenes were prepared from graphites by microwave irradiation. Addition of graphenes to bisphenol A based epoxy resins such as YD-128 from Kukdo Chemical results in an increase in viscosity and shear thinning behavior, affecting the filling process. The curing of epoxy resins is also affected by graphenes. In order to develop a model for simulation of the filling and curing of epoxy resins containing different amounts of graphenes in the resin transfer molding, FLUENT and MATLAB have been used in this study, which are a finite element based computational fluid dynamics analysis tool and a general purpose numerical analysis tool, respectively. The effects of graphenes on the mold filling pattern and curing profile are discussed for the resin transfer molding of bisphenol A based epoxy resins.

Synthesis and characterization of a chalcone-derived epoxy containing pyrazoline ring with excellent flame resistance

2021 ◽  
pp. 095400832199352
Author(s):  
Yan-min-zi Zhang ◽  
Meng-yao Huang ◽  
Jun Zhou ◽  
Da-zhe Li ◽  
Yi Lei
Keyword(s):  
Bisphenol A ◽  
Epoxy Resin ◽  
Epoxy Resins ◽  
Condensation Reaction ◽  
Alkaline Condition ◽  
Flame Resistance ◽  
Limiting Oxygen Index ◽  
Pyrazoline Ring ◽  
Curing Agents

Traditional epoxy resins are made by the reaction of petroleum-based bisphenol A and epichlorohydrin. The disadvantages of these petroleum-based epoxy including certain biological toxicity and flammability. To solve these problems, we first synthesized a diphenol compound 3,5-(4-hydroxyphenyl)-2-pyrazoline (TPP), which was prepared by condensation reaction of bio-based chalcone with hydrazine hydrate to replace standard petroleum-based bisphenol A. Then it was condensed with epichlorohydrin under alkaline condition to form a fully aromatic pyrazoline ring epoxy (TPP-EP). For further research, we use 4,4′-diaminodiphenylmethane (DDM) as the curing agent. When compared with bisphenol A epoxy resin (DGEBA/DDM), TPP-EP/DDM possessed a higher glass transition temperature (233°C vs. 176°C), and even showed that the residual carbon (in N2) and the storage modulus (at 30°C) increased by 201% and 74%, respectively. What’s more, TPP-EP/DDM system also had good inherent flame retardancy. The limiting oxygen index of TPP-EP/DDM was 33.1, reaching the V-0 level tested by UL-94. From the cone test, the THR, p-HRR, p-SPR and TSP values of TPP-EP/DDM systems also showed different degrees of reduction. Since TPP-EP contained tertiary amine active groups that could be used as a kind of catalytic curing agents for epoxy resins, thus the compound had certain self-curing properties. This work was of great significance for the synthesis of pyrazoline bio-based environmentally friendly flame-retardant epoxy resin.

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