Epichlorohydrin/bisphenol resins

These resins, more correctly called epichlorohydrin bisphenol resins, are chain-structured compounds composed of aromatic groups and glycerol joined by ether linkages. Various modifying agents are used to produce epoxies of... [Pg.69]

Resin type Orthophthalic, isophthalic, low profile, halogenated Epoxy Novolak, methacrylate esters of bisphenol epoxy resins Epichlorohydrin/ bisphenol-A... [Pg.324]

The multifunctionality contributes higher reactivity and cross-link density. These factors are especially critical when formulating systems that require improved thermal performance over conventional epichlorohydrin—bisphenol A systems. The melt viscosity of these resins, which are solids at room temperature, decreases sharply with increasing temperature. This affords the formula tor an excellent tool for controlling flow of molding compounds, and facilitating the incorporation of ECN resins into other epoxies, eg, for powder coatings. [Pg.363]

EPON 1001 60 225 P MeCI (hot) 284 489 406 539 601 Epichlorohydrin-bisphenol A resin average molecular mass = 900 for steroids, pesticides... [Pg.31]

The ratio of the main ingredients used in the synthesis of epoxy resins (epichlorohydrin bisphenol A) determines the extent of the reaction and the molecular weight (or value of n repeating units in the molecular chain). The addition of bisphenol A to the reaction mix will advance the molecular weight of the resin and the value of n. As n increases, the viscosity or melting point of the resin also increases. Also as the value of n increases, the number of hydroxyl groups increases while the number of epoxy groups remains constant. [Pg.28]

Epoxy resins were first introduced by Ciba-Geigy, Ltd., in 1946 although their development began decades earlier. The most common commercial epoxy resin is formed from the reaction of bisphenol A and epichlorohydrin. This resin is known as the diglycidyl ether of bisphenol A or DGEBA (Fig. 2.4). [Pg.30]

With exactly equal amounts of bisphenol A and epichlorohydrin, this polymerization would continue until the polymer chains were very long and the material would be a solid polymer. In making epoxy resins, however, excess epichlorohydrin is added to form short chains with epichlorohydrins on both ends. More epichlorohydrin gives shorter chains and a runny prepolymer. Less epichlorohydrin gives longer chains (containing up to 25 epichlorohydrin/bisphenol A units) and a more viscous prepolymer. [Pg.657]

Greenlee explored the epichlorohydrin-bisphenol A synthesis route for the production of new resins (without caustic-sensitive ester linkages) for coatings. [Pg.24]

Resins. The epoxy ester was prepared from one of the solid grades of epichlorohydrin/bisphenol-A type resin. The resin was first esterified with benzoic acid to 40% of the available esterifiable groups. The re-... [Pg.150]

The DMA of a epichlorohydrin-bisphenol A epoxy resin cured using BF3-ethylamine is shown in Figure 11.16 (37). [Pg.696]

Synthesis. lj characterization of the graft copolymer has been reported. The Epoxy resin used is a high molecular weight (Mn=10,000) epichlorohydrin-Bisphenol type, and the acrylic is approximaely a 2 1 molar ratio of methacrylic acld/styrene. The Epoxy/acrylic ratio is approximately 80/20 by weight. Grafting is achieved.by.free radical means... [Pg.285]

Chem. Descrip. Epichlorohydrin-bisphenol A epoxy resin CAS 25068-38-6... [Pg.245]

Chem. Descrip. Epichlorohydrin-bisphenol A epoxy sol n. resin in xylene Uses Epoxy tor marine/protective coatings Properties Gardner 3 sol n. dens. 9.2 Ib/gal vise. 500-1200 cps flash pt. 23 C EEW 230-250 80% NV D.E.R. 337-X90 [Dow/Epo) Prods. Intermeds.j... [Pg.245]

Chem. Desaip. Acrylic copolymer, modified bisphenol A-epichlorohydrin epoxy resin (3.9%), dipropylene glycol monobutyl ether (3.5%), propylene glycol ethyl ether (1.4%), 2-propoxyethanol (0.7%), ammonia (0.4%) Uses Acrylic-epoxy copolymer for general metal, industrial maintenance, and automotive metal coatings... [Pg.560]

Synonyms Bisphenol A, (chloromethyl) oxirane polymer Bisphenol A, epichlorohydrin polymer (Chloromethyl) oxirane, 4,4 -(1-methylethyl-idene) bisphenol copolymer Epoxy resin Epoxy resin ERL-2795 4,4-Isopropylidenediphenol-epichlorohydrin epoxy resin 4,4 -lsopropyli-denediphenol, polymer with 1-chloro-2,3-epo) propane Phenol, 4,4 -isopropylidenedi-, dimer with 1 -chloro-2,3-epo) propane Phenol, 4,4 -isopropylidenedi-, polymer with 1-chloro-2,3-epoxypropane Phenol, 4,4 -(1-methylethylidene) bis-, polymer with (chloromethyl) oxirane CiassiTicatbn Polymer... [Pg.1102]

Isopropylidenediphenol-epichlorohydrin epotqr resin 4,4 -Isopropylidenediphenol, polymer with 1-chloro-2,3-epoxypropane. See Epoxy, bisphenol/Vepichlorohydrin... [Pg.1163]

Resin, Phenoxy Epichlorohydrin Bisphenol see Poly-(cis-1,4-isoprene) 631-... [Pg.74]

Bisphenol A, epichlorohydrin polymer. See Epoxy, bisphenol A/epichlorohydrin Bisphenol A/epichlorohydrin resin CAS 25068-38-6 Synonyms 4,4 -... [Pg.530]

Phenol, o-isopropyl-. See o-lsopropylphenol Phenol, p-isopropyl. See p-lsopropylphenol Phenol, 4,4 -isopropylldenedl-. See Bisphenol A Phenol, 4,4 -isopropylidenedi-, polymer with 1-chloro-2,3-epoxypropane. See poxy, bisphenol A/epichlorohydrin Bisphenol A/epichlorohydrin resin... [Pg.3295]

Epoxy resin-based epichlorohydrin,bisphenol-A and cardanol was evaluated as a paint binder and found to show increased tensile strength, elongation, adhesive strength with steel and low water vapour transmission when compared to epoxy resin without cardanol. ... [Pg.196]

An epoxy resin-based on epichlorohydrin, bisphenol-A and cardanol was evaluated as a binder for a paint system and was found to offer better properties in terms of increase in tensile strength, elongation, bonding with steel and lowering of water vapour transmission than epoxy resin. In addition, iron oxide-based paints in epoxy-cardanol resin showed better performance than zinc phosphate-based paints." " ... [Pg.204]

Bisphenol A is mainly used to manufacture epoxy resins by the reaction with epichlorohydrin in the presence of caustic soda at 40 to 60 °C. This yields resins with a molecular weight between 450 and 4000. The molecular weight of the resins increases as the epichlorohydrin/bisphenol A ratio falls. [Pg.160]

SERs are prepared by two processes the taffy process and the advancement or fusion process. The first is directly from epichlorohydrin, bisphenol A, and a stoichiometric amount of NaOH. This process is very similar to the caustic coupling process used to prepare liquid epoxy resins. Lower epichlorohydrin to bisphenol A ratios are used to promote formation of high MW resins. The term taffy is derived from the appearance of the advanced epoxy resin prior to its separation from water and precipitated salts. [Pg.2667]

In the taffy process, a calculated excess of epichlorohydrin governs the degree of polymerization. However, preparation of the higher molecular weight species is subject to practical limitations of handling and agitation of highly viscous materials. The effect of epichlorohydrin-bisphenol A (ECH-BPA) ratio for a series of solid resins is shown in Table 6. [Pg.2668]

Table 6. Effect of Epichlorohydrin-Bisphenol A Ratio on Resin Properties of Taffy SERs...

Solid epichlorohydrin - bisphenol A resins are high-molecular, weight epoxy resins that are characterized by a repeat unit n ranging from 2 to about 30 for commercial resins and two terminal epoxy groups as ideally represented below ... [Pg.94]

These resins are best prepared by the reaction of epichlorohydrin, bisphenol A, and a stoichiometric amount of sodium hydroxide. The process has been referred to as the taffy process. [Pg.94]

Polymeric products [117] are obtained when the mole ratio is less than 2 for the epichlorohydrin-bisphenol A reaction and a molecular weight of 1420 is reported at a mole ratio of 1.2 [118]. High molecular weight resins (30,000 or more) are known as phenoxy resins, and these thermoplastic resins are used for coatings, adhesives, and various molding applications. [Pg.113]

As an example of the treatment of PMR data proposed by Hammerich and Willeboordse [85] consider the cases of epichlorohydrin - bisphenol-A condensates. Figure 3.10(a) exhibits the PMR spectrum of Bakelite epoxy resin ERL-2774, typical of that observed for the diglycidyl ethers of bisphenol A (DGEBA) where the mnltiplet at 2 ppm is attributable to pentadeuteroacetone. If n represents the number of repeat units, then the assignment and the number of protons contribnting to each lettered area are portrayed in Table 3.11. [Pg.166]

A numerical simulation was developed to predict the one-dimensional transient temperature profile of the composite during both microwave and conventional heating for a glass/epoxy laminate with a thickness of 25 mm. As raw materials for the experimental investigation a bisphenol F/epichlorohydrin epoxy resin (Shell Epon 862) and an aromatic diamine (Shell Epi-Cure W) as a curing agent were used. The microwave power was varied continuously from 0 to 6 kW... [Pg.1012]

The cure of an epichlorohydrin-bisphenol A resin and curing agent containing a primary diamine and an amido-polyamine was studied using two complementary techniques, low resolution pulsed NMR spectroscopy and measurement of pulsed broad bandwidth ultrasound propagation velocity and absorption changes. The two... [Pg.105]

Epoxy Resins. The chemistry of epoxy resin adhesives is quite varied. However, the most widely used is that formed from the reaction of 4,4 -isopropyhdene diphenol (bisphenol A) [80-05-7] and epichlorohydrin [106-89-8] C H CIO. This epoxy resin is more commonly known as... [Pg.232]

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