Triamines aliphatic

U.S. Pat. 4,198,348 (Apr. 15,1980), F. Bertini and C. A. Pauri (to SNIA VISCOSA Societa Nazionale Industria Applicazioni Viscosa SpA). Armeen, Duomeen and Triamine Aliphatic Amines, Product Bulletin, Bulletin 89—134, Akzo Chemicals Inc., Chicago, HI., 1989. 

In addition to a block copolymer, a microcapsule was made from suspension interfacial polycondensation between diacid chloride having aromatic-aliphatic azo group and aliphatic triamine [70,71]. The capsule was covered with a crosslinked structure having an azo group that was thermally stable but sensitive to light so as to be applicable to color photoprinting materials. 

The aliphatic amines, including triethylene tetramine (TETA) and diethylene triamine (DETA), are highly alkaline (pH 13-14), caustic, and volatile and may cause severe... 

Research with tridentate ligands has been carried out for several fundamental coordinating groups, pyrazolyl-borates, aliphatic triamines and histidine-type ligands. Other ligands have also been investigated and some of the structures are shown in Scheme 15. 

Orthoformates have been reacted with secondary aliphatic aminesj- A -alkylanilines, 1,3.5-triaminocyclohexanes and cyclic triamines to afford trisaminomethane derivatives, e.g. (535) and (536) (Scheme 97), usually in unsatisfactory yields. Better results have been reported when ortho-formates were replaced by amide acetals. - ... 

Aminic polyols are low molecular weight adducts of propylene oxide (PO) [and/or ethylene oxide (EO)] made from aliphatic or aromatic polyamines such as ethylenediamine (EDA), diethylene triamine (DETA) [1, 2], ortho-toluene diamine (o-TDA) [3, 4] or diphenylmethanediamine (MDA) [2, 5, 6]. Because these starters are liquid at room temperature (EDA, DETA) or low melting point solids (o-TDA, MDA), they are alkoxylated in the absence of solvents. 

Reactions of fluoro- and chlorocontaining chromones with aliphatic mono-, di-, and triamines 01MI76. 

Fig. 2.2.4. Tc(CO)3-assisted cleavage of solid-phase bound biomolecules functionalized with an aliphatic triamine chelate, leading to high specific activity of radiotracer...

Hazardous properties of some of the aliphatic amines (including diamines, triamines, and aziridines) are presented in Table 8.1. Amines in general, as mentioned earlier, are strongly caustic and can injure the cornea upon direct contact. Skin contact can cause burns, which may vary from severe to second degree or to mild, depending on the carbon chain length. The toxicity is low to moderate. The flammability decreases with an increase in the carbon number. The reactivity of these compounds, in general, is low. Outlined in Table 8.1 are some of the amines used commercially that are hazardous. 

The most widely used epoxy systems are those which are based on pure epoxy resins, hardened with a curing agent. Curing of epoxy resins containing two epoxy groups per molecule can be readily accomplished by the addition of primary polyamines, such as ethylene diamine, diethylene triamine, triethylene tetramine, tetra-ethylene pentamine, etc. Aliphatic polyamines produce cured resins with the greatest chemical resistance. However, these systems have inadequate durability, weather resistance and film-forming properties. They are sensitive to humidity, errors in addition rates are quite possible, and the catalysts are relatively toxic. 

A molecular switch (271) has been prepared based on cucurbituril and a triamine (Equation (64)) <90CC1509>. At low pH, the cucurbituril is located proximal to the aryl group (271a). At high pH, the cucurbituril moves to the aliphatic portion of the molecule (271b). The location of the cucurbituril was determined by NMR spectroscopy <90CC1509>. 

Silica-based weak anion exchangers are obtained by direct silanization and are the precursors to strong ion exchangers. Aminopropyl silanes and die-thylaminopropyl silanes are readily available commercially. To increase the exchange capacity, the simple amino group can be replaced with an ethylene diamine or a diethylene triamine function. Silica-based weak cation exchangers with an aliphatic carboxylic acid are available as well. 

Stoichiometric ratios can be calculated similarly for hardeners. In principle, each active hydrogen will react with one epoxy group. Thus a low-molecular-weight aliphatic polyamine such as diethylene triamine (DETA) has a molecular weight of 103 and five active hydrogens. The hydrogen equivalent is thus 20.6. The stoichiometrically correct ratio with an epoxy resin of EEW 200 would thus be 100 parts resin to 10.3 parts of DETA. In practice there is always a percentage of homopolymerization, especially at the temperature... 

Aliphatic primary amines. Common examples are diethylene triamine (DETA), tetraethylene pentamine (TEPA), n-aminoethyl piperazine, and isophorone diamine. They give good room-temperature cure at stoichiometric ratios, but have poor HDT, inconvenient mix ratios, high peak exotherm, and are strongly irritant. Isophorone diamine produces very light colored mixes with good color stability. 

Preparation of thin films by interfacial polycondensation A typical procedure for preparation of a free-floating interfacial film was as follows. A 1 mM solution of 29 (R = COCl) in chloroform was added to a Petri dish, and an equal volume of 1 mM 29 (R = -OH) in pH 11 carbonate buffer was carefixlly layered on top. After 1-3 h reaction time, the aqueous layer was removed by pipet until the interfacial film breaks and folds over the retreating aqueous buffer solutions. The wet film is then deposited onto an appropriate substrate for subsequent analyses, wetted with 2-propanol, and allowed to air-dry overnight. The same technique provided polyporphyrin films made from 29 (R = COCl) and aliphatic polyamines such as ethylenediamine, diethylene-triamine and poly(ethyleneimine), although significantly shorter reaction times (several minutes) are sufficient and substantially thicker films result. 

These are widely used because the curing of the epoxies takes place at room temperature. High exothermic temperatures develop during the curing reaction that limit the mass of material that can be cured. The electrical and physical properties of these aliphatic-cured resins had the greatest tendency toward degradation of electrical and physical properties at elevated temperatures. Typical aliphatic amines used include diethylene triamine (DETA) and triethylene tetramine (TETA). 

Many different aliphatic and aromatic polyamines are available for cross-linking epoxy resins. Some of these are ethylenediamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine, and many others. Among the aromatic polyamine are / -phenylene diamine, /n-phenylene diamine, 4,4 -diaminodiphenyl-methane, and diaminodiphenylsulfone. 

Epoxide adhesives comprise epoxy resin, many of which are prepared from phenols and epichlorohydrin, for example, the diglycidyl ether of bis-phenol A or bis-phenol F usually, these resins are a mixtnre of molecular weights blended to fit the applications. The most-common cnratives for epoxy resins are polyanfines (used in stoichiometric amounts), usually a chain-extended primary aliphatic amine, for example, diethylene triamine or triethylene tetraamine or chain-extended equivalents, which react rapidly with the epoxy resin at room temperature. Aromatic amines react slowly at room temperature but rapidly at higher temperatures. Most epoxide adhesives also contain catalysts, typically, tertiary amines. Dicyanimide is the most-common curative for one-component high-temperature-cured epoxide adhesives. Mercaptans or anhydrides are used as curatives for epoxide adhesives for specialist applications, for example, for high-speed room-temperature cures or for electronic applications. A smaller number of epoxide adhesive are cured by cationic polymerization catalysed by Lewis acids photogenerated at the point of application. Lewis acid photoinitiators include diaryliodonium and triarly sulphonium salts. See Radiation-cured adhesives. 

Aliphatic Aliphatic amines allow curing of epoxy Diethylene triamine... 

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