Bisphenol A-epichlorohydrin condensation

Fluorescence Intensities. The fluorescence from polymeric films of bisphenol A-epichlorohydrin condensate 1 (Eponol-55-B-40,... 

Materials. Bisphenol A-epichlorohydrin condensate 1 (Eponol-55-B-40, Shell Chemical Co.) was precipitated from chloroform solution by addition of methanol three successive times prior to utilization. Polymer films of 1.5 and 15 pm were cast onto glass plates from chloroform solution. 

BISPHENOL A EPICHLOROHYDRIN CONDENSATE (1675-54-8) Combustible liquid (flash point 175°F/79°C). Unstable ethers form peroxides on contact with air and light. Incompatible with strong acids, acyl halides, strong oxidizers, permanganates, peroxides, alkalis, ammonium persulfate, bromine dioxide. Attacks some plastics, rubber, and coatings. 

Bisphenol A, epichlorohydrin Condensation and ringopening polymerization Surface coating (44%). laminates and composites (18%, moldings (9%). flooring (6%), adhesives (5%)... 

Bis (p-hydroxyphenyl) propane, diglycidyl ether Bisphenol A-epichlorohydrin Bisphenol A-epichlorohydrin condensate DBEBPA DGEBA... 

Bisphenol-A - epichlorohydrin condensates of the following type have been determined by NMR spectroscopy [85], also polycaprolactone polyols (see below), diethylene glycol started caprolactone ester diols ... 

Synthesis Epoxy resins consisting ofglycidyl ether, ester and amines are generally prepared by the condensation reaction between diol, dibasic acid or amine and epichlorohydrin in the presence of sodium hydroxide with the elimination of hydrochloric acid. The commercially available epoxy resins are, however, made by the reaction of epichlorohydrin and bisphenol-A. Cashew nut shell liquid (CNSL)-based novolac epoxy resins have also been reported [342]. 

Epon Resins. Trademark of Shell Chemical Co, New York 20, NY for condensation products of epichlorohydrin and bisphenol A [which is para, para -isopropylidinediphenol, (CH3)2C(C6H4OH)2, described on p 156-R... 

A very useful group of adhesives and plastics is based on condensation polymers of bisphenol A and chloromethyloxacyclopropane (epichlorohydrin, CH2—CHCH2C1). The first step in the formation of epoxy resins is to form a... 

A major type of epoxy monomers is that derived from the reaction of bis(4-hydroxy phenylene)-2,2 propane (called bisphenol A) and 1-chloropropene 2-oxide (called epichlorohydrin) in the presence of sodium hydroxide (condensation reaction). The structure of the major product, bisphenol A digly-cidyl ether (DGEBA) and its condensed forms (Table 2.7a), is dependent upon the stoichiometry of the reactants. 

Polymers formed by condensing epichlorohydrin with a dihydroxy compound, most often bisphenol A. (p. 657)... 

Bisphenol A diglycidyl ether - prepared by a condensation reaction between epichlorohydrin and bisphenol A. 

Epoxy resins are a class of polymers that can be crossllnked to yield materials with a wide range of physical and chemical properties. Usually, linear, low-molecular weight products, known as pre-poljnners or first-stage polymers are polyethers with reactive epoxide endgroups. The most commonly used prepolymer is prepared by the condensation or step-growth polymerization of epichlorohydrin and bisphenol A as shown by the following equation ... 

Epoxy resins first developed commercially and still completely dominating the worldwide markets are those based on 2,2-bis(4 -hydroxyphenyl) propane, more commonly known as bisphenol A (as it is produced by condensation of phenol with acetone) and l-chloro-2,3-epoxy-propane, also known as epichlorohydrin. It can be seen from the general formula of these resins that the molecular species concerned is a linear polyether with terminal glycidyl ether group... 

The molecular weights of epoxy resins depend on the molar ratio of epichlorohydrin and bisphenol A used in their preparation (see Table 4.25). In a typical process for the production of liquid epoxy resins, epichlorohydrin and bisphenol A in the molar ratio of 10 1 are added to a stainless steel kettle fitted with a powerful anchor stirrer. The water content of the mixture is reduced to below 2% by heating the mixture until the epichlorohydrin-water distils off. After condensation, the epichlorohydrin layer is returned to the kettle, the water being discarded. 

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