Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Diglycidyl ether epoxy resins based

W. Burchard (University of Freiburg, Freiburg i. Br., FRG) Branching in Epoxy Resins Based on Diglycidyl Ethers of Bis-phenol A... [Pg.188]

Epoxy resins based on diglycidyl ether of bisphenol A are not only the oldest type of epoxy resins but also the most valuable in adhesive formulations. The primary reasons for their popularity have been... [Pg.72]

Diglycidyl ether of resorcinol-based epoxy resins provide the highest functionality in an aromatic diepoxide. It is one of the most fluid of epoxy resins, with a viscosity of 300 to 500 cP at 25°C. Because of its high functionality, it is a very reactive resin and cures more rapidly than DGEBA epoxies with most conventional curing agents. [Pg.78]

In this paper we discuss the use of carbon-13 nmr to measure epoxide equivalent weights of epoxy resins based on the diglycidyl ether of bisphenol A (DGEBA). The results obtained to date indicate that the carbon-13 technique could be an attractive alternative to current methods. [Pg.83]

Table I lists typical properties of a baker s dozen of these resins, produced by typical direct preparations, without extensive purification. Overall, the viscosities of these resins were quite low, particularly by comparison to the well known general purpose epoxy resins based on the diglycidyl ether of bisphenol A (DGEBA). The more shielded higher alkylsubstituted hydantoin rings favored lower viscosities. Some anomalies in these viscosities presumably reflected either a tendency of certain resins to crystallize, or the presence of some species of higher molecular weight, formed by reaction of the glycidyl group with a second hydantoin ring. Table I lists typical properties of a baker s dozen of these resins, produced by typical direct preparations, without extensive purification. Overall, the viscosities of these resins were quite low, particularly by comparison to the well known general purpose epoxy resins based on the diglycidyl ether of bisphenol A (DGEBA). The more shielded higher alkylsubstituted hydantoin rings favored lower viscosities. Some anomalies in these viscosities presumably reflected either a tendency of certain resins to crystallize, or the presence of some species of higher molecular weight, formed by reaction of the glycidyl group with a second hydantoin ring.
To date only few dielectric relaxation studies have been reported on thermosetting nanocomposite systems. Kanapitsas et al. [109] reported isothermal dielectric relaxation studies of epoxy nanocomposite systems based upon three different clay modifications, a low viscosity epoxy resin based on the diglycidyl ether of bisphenol-A type (Araldite LY556, CIBA) and an amine hardener in a temperature range of 30-140 °C. Whilst details on the epoxy system investigated and the nanocomposite morphology were vague, it was reported that the overall mobility is reduced in the nanocomposite compared to the neat matrix resin. [Pg.60]

Discuss the chemistry of epoxy resins based on diglycidyl ethers of bisphenol A, their preparations, and crosslinking reactions with amines, dianhydrides, and dicyanodiamide. [Pg.373]

Functionalized PPE is used in the thermosetting reaction. The curable part is an epoxide resin. For PCBs, a flame retardant composition is preferred, such as a bisphenol A diglycidyl ether tetrabromobisphenol A-based epoxy resin [50,25]. [Pg.111]

Kanerva L, Jolanki R, Tupasela O, et al. (1991) Immediate and delayed allergy from epoxy resins based on diglycidyl ether of bisphenol A. Scand J Work Environ Health 17 208-215... [Pg.216]

Hydrogenated DGEBA. In 1976, Shell Chemical Co. introduced epoxy resins based on the diglycidyl ether of hydrogenated bisphenol A, 2,2-bis[4-(2,3-epoxypropoxy)cyclohexyl]propane (232-238 EEW rj at 25°C 2-2.5 Pa s). [Pg.2683]

Structure II represents the general formula of epoxy resins based on bisphenol A and epichlorhydrin. Such compounds are also termed diglycidyl ethers since they contain two glycidyl ether groups... [Pg.374]

More recent developments in curing epoxy resins based on bisphenol A diglycidyl ether is shown in Table XII. [Pg.116]

EP2 is an epoxy resin based on bisphenol A-diglycidyl ether and diaminodiphenyl sulfone as... [Pg.415]

Poly(ethylene terephthalate-co-4,4 -sulphonyldibenzoate) Poly(ethylene-2,6-naphthalate) Epoxy resins based on bis-phenol-A diglycidyl ether Melamine-formaldehyde resins Polyurethanes... [Pg.15]

Amendola E, Carfagna C, Giamberini M, Pisaniello G (1995) Curing reactions of a liquid-crystalline epoxy-resin based on the diglycidyl ether of 4,4 -dihydroxy-alpha-methylstilben. Macromol Chem Phys 196 1577-1591... [Pg.483]

See other pages where Diglycidyl ether epoxy resins based is mentioned: [Pg.57]    [Pg.269]    [Pg.94]    [Pg.1285]    [Pg.1525]    [Pg.136]    [Pg.222]    [Pg.134]    [Pg.494]    [Pg.495]    [Pg.113]    [Pg.332]    [Pg.90]    [Pg.588]    [Pg.298]    [Pg.2686]    [Pg.2764]    [Pg.375]    [Pg.560]    [Pg.561]    [Pg.189]    [Pg.72]    [Pg.365]    [Pg.125]    [Pg.131]    [Pg.132]    [Pg.417]    [Pg.494]    [Pg.495]   
See also in sourсe #XX -- [ Pg.83 , Pg.84 , Pg.85 , Pg.86 , Pg.87 , Pg.88 , Pg.89 ]



SEARCH



Diglycidyl ether

Diglycidyl ether resins

Epoxy-based

Ethers epoxy

© 2024 chempedia.info