Epoxy/epoxies polyfunctional

Epoxy (two- Polyfunctional amines Oxirane, primary, and Addition followed by ring 7 o... 

The majority of the currently used coating systems is based on copolymers prepared from epoxy resins, polyfunctional amines, and partially blocked isocyanates (84-87). The resins are generally solubilized by the formation of cationic derivatives of amines by aminolysls of the carbamate in the partially blocked isocyanate. The principal applications of these cationic electrocoating systems are as automotive primers, in appliances, as primers and one-coat system.s, and in various other industrial applications. The main... 

Cardura E 10 CCRIS 2627 EINECS 247-979-2 2,3-Epoxypropyl neodecanoate Glycidyl ester of neodeoanoic acid Glycidyl neodecanoate Glydexx N 10 Neodecanoic acid, 2,3-epoxypropyl ester Neodecanoic acid, oxiranylmethyi ester 1-Propanoi, 2,3-epoxy-, neodecanoate. Polyfunctional monomer in coatings to improve adhesion to substrate and solvent resistance. Liquid bp = 260° d = 0,97 insoluble in H2O, soluble in organic solvents LDso (rat orl) > 9,59 g/kg, ExxonMobil Chem. Co. 

This study of elastomer-modified solution epoxy coatings uses typical epoxy-polyamide and epoxy-polyfunctional amine based models. 

Adhinarayanan [1201 describes the adhesive properties of epoxy—imide resins obtained through the reaction of epoxy resins, namely, Araldite GY250 (di-glycidylether of bisphenol A and epichlorohydrin difunctional) and Araldite EPN1138 (novolac epoxy resin polyfunctional), both manufactured by Hidustan Ciba-Geigy India Ltd (Calcutta), with bis(carboxyphthalimide)s. The chemical structures of these epoxy resins and bis(carboxyphthalimide) are... 

For some years, this type of vehicle was used in anionic electro deposition primers. However for automobiles cationic electro deposition primers are now preferred. The vehicles for cationic primers are proprietary but probably consist of the reaction product of epoxy resins and polyfunctional amines solubilized by the conversion of amine groups into salts using an acid such as lactic acid (2-hydroxypropanoic acid) [50-21-5] Alcohol-blocked... 

Polynuclear Phenol—Glycidyl Ether-Derived Resins. This is one of the first commercially available polyfunctional products. Its polyfunctionahty permits upgrading of thermal stabiUty, chemical resistance, and electrical and mechanical properties of bisphenol A—epoxy systems. It is used in mol ding compounds and adhesives. 

Aliphatic Glycidyl Ethers. Aliphatic epoxy resins have been synthesized by glycidylation of difunctional or polyfunctional polyols such as a 1,4-butanediol, 2,2-dimethyl-l,3-propanediol (neopentyl glycol), polypropylene glycols, glycerol, trimethylolpropane, and pentaerythritol. 

Polyfunctional aliphatic resins have exhibited high reactivity and degrees of cure with amines but problems of toxicity have diminished their usehilness and commercial interest. SoHd epoxy resins can be prepared by the taffy process or the advancement process. 

The physico-mechanical, thermal, and adhesion properties of the synthesized polyfunctional PSs are dependent on the nature of functional groups in the aromatic ring. In this case, the following are properties of the chlorohydrin and epoxy groups highest elasticity, resistance to strike, and adhesion properties with carboxyl and olefinics. Furthermore, the—CO—CH=CH-—COOH group was provided new properties such as the photosensitive capability. Functionalized PSs obtained are characterized by their high thermostability, adhesion, and photosensitivity. 

Epoxy resins are usually understood to be products of reaction of polyfunctional hydroxy compounds with l-chloro-2,3-epoxypropane (epichlorohydrin) in basic medium. In the simplest case two mol of epichlorohydrin react, for example, with one mol of bisphenol A, according to the following scheme ... 

A modified BMI-epoxy resin system has been introduced by Shell Chemical Company. The system is a highly reactive blend of a bismaleimide, COM-PIMIDE 1206 (55-60% by weight solution of BMI in DMF), and EPON Resin 1151, a polyfunctional epoxy resin (60). In contrast to many polyimide resins on the market, no free MDA is present in the product. This is an important feature, since MDA has been identified as an animal carcinogen and possibly a human carcinogen. This resin system has been fully evaluated for use in multilayer PCB boards (61). 2-Methylimidazole is recommended as a catalyst. However, if required, the processing window can be widened by using 2-phenylimidazole... 

Perez, R. M., Sandler, J. K. W., Altstacdt, V., Hoffmann, T., Pospiech, D., Artner, J., Ciesielski, M., Doering, M., Balabanovich, A. I., and Schartel, B., Effective halogen-free flame retardancy for a monocomponent polyfunctional epoxy using an oligomeric organophosphorus compound, J. Mater. Sci., 2006, 41, 8347-8351. 

Epoxy Adducts. The epoxy resin itself may be reacted with di- or polyfunctional reactants containing more than one epoxy group. The number of potential epoxy adducts is very large. Typical are phosphorous-containing epoxy resins prepared by reaction of diepoxies with acid dichlorides of phosphoric acids. This is accomplished at an acid diepoxy ratio of 1 2 in the presence of FeCl3 catalyst. Adducts may also be prepared by the reaction of chain hydroxyls. 

The polyaddition reaction is the most commonly used type of reaction for the cure of epoxy resins. The curing agents used in this type of reaction have an active hydrogen compound, and they include amines, amides, and mercaptans. With this reaction mechanism, the most important curing agents for adhesives are primary and secondary amines containing at least three active hydrogen atoms and various di- or polyfunctional carboxylic acids and their anhydrides. 

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