Polyfunctional amines

To convert the epoxy resins into cross-linked structures, it is necessary to add a curing agent. Most of the curing agents in common use can be classified into three groups tertiary amines, polyfunctional amines, and acid anhydrides. 

Diglycidyl ethers of Bisphenol A cannot be cross-linked through heating alone. Chemical cross-linking agents must be added. Most commonly used compounds are tertiary amines, polyfunctional amines, and acid anhydrides. Lewis acid, phenols, and compounds like dicyandiamide, however, are also used. 

Attunes. Salts of Amines. Polyfunctional Confounds which contain one or more Amino-Groups. 

Ammonium acetate and sodium methoxide are effective catalysts for the ammonolysis of soybean oil (49). Polyfunctional amines and amino alcohols such as ethylenediamine, ethanolamine, and diethanolamine react to give useful intermediates. Ethylenediamine can form either a monoamide or a diamide depending on the mole ratio of reactants. With an equimolar ratio of reactants and a temperature of >250° C, a cyclization reaction occurs to give imidazolines with ethylenediamine (48) ... 

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... 

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. 

A number of modified amines have been marketed commercially. For example, reaction of the amine with a mono- or polyfunctional glycidyl material will give a larger molecule so that larger quantities are required for curing, thus helping to reduce errors in metering the hardener. 

Compared to the chemical modification reactions of PS, alkylation and acylation reactions are preferred to other reactions, such as halogenation, nitrolation, sulfo-nation, amination, and chloromethylation, etc. because the obtained polyfunctional PS has higher physico-me-chanical properties. 

Curing an epoxv resin with a polyfunctional amine... 

Although a polyfunctional organic molecule might contain several different functional groups, we must choose just one suffix for nomenclature purposes. It s not correct to use two suffixes. Thus, keto ester 1 must be named either as a ketone with an -one suffix or as an ester with an -oate suffix but can t be named as an -onoate. Similarly, amino alcohol 2 must be named either as an alcohol (-0/) or as an amine (-amine) but can t be named as an -olamine or -anritiol. 

Demand for amine (neutralization capacity) is determined by C02 loading and amine equivalent weight. Polyfunctional amines appear to have a large equivalent weight advantage, but in practice they often have very low volatility and poor thermal stability. 

Polyethylene glycol 600 monolaurate, in cleaning formulations Polyethylene glycol-8 dioleate Polyfunctional amines... 

It was only around 1850 that the first amines were discovered by Wurtz [2], who considered them as alkylated (or arylated) derivatives of NH3. Nowadays, it is well known that the amine function is widespread among biologically important compounds, but mostly it is present in polyfunctional molecules such as amino acids, alkaloids, etc. Simple amines are very rare in nature, with the exception of tri-ethylamine and the trimethylammonium ion which come from the putrefaction of proteins. 

Blends containing (1) tannin or amino methylated tannin, (2) a cationic polymer, (3) polyfunctional amines WiO [1010]... 

Complexes formed with the extended chain polyfunctional amines H2N[CH2] NH [CH2]mNH[CH2] NH2 (n or m = 2 or 3) may be explosive and must be handled with care. 

In addition to the use of peroxides for crosslinking, metal oxide, polyfunctional alcohols, amines and epoxide resin cure systems can be used with CSM rubbers. In the metal oxide based cure systems it is usual to add a weak acid, such as stearic acid, and accelerators, such as MBT, MBTS or TMTD magnesium or lead oxides are generally used. 

Chloro-5,7,7,12,14,14-hexamethyl-l, 4,8,11 -tetraaza-4,11 -cyclotetradecadi-eneiron(II) perchlorate, 3724 Copper(II) perchlorate Polyfunctional amines, 4057 Copper(II) perchlorate iV-(2-Pyridyl)acylacetamides, 4057 Diacetonitrile-5,5,7,7,12,14,14-hexamethyl-1,4,8,11 -tetraaza-4,11 -cy clotetra-decadieneiron(II) perchlorate, 3813... 

Types of compounds are arranged according to the following system hydrocarbons and basic heterocycles hydroxy compounds and their ethers mercapto compounds, sulfides, disulfides, sulfoxides and sulfones, sulfenic, sulfinic and sulfonic acids and their derivatives amines, hydroxylamines, hydrazines, hydrazo and azo compounds carbonyl compounds and their functional derivatives carboxylic acids and their functional derivatives and organometallics. In each chapter, halogen, nitroso, nitro, diazo and azido compounds follow the parent compounds as their substitution derivatives. More detail is indicated in the table of contents. In polyfunctional derivatives reduction of a particular function is mentioned in the place of the highest functionality. Reduction of acrylic acid, for example, is described in the chapter on acids rather than functionalized ethylene, and reduction of ethyl acetoacetate is discussed in the chapter on esters rather than in the chapter on ketones. 

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