TRIETHYLENE TETRAMINE

Diamine curatives were the first cross-linking agents for fluorocarbon mbbers. They are corrosive to mild steel molds and have been replaced in many appHcations by the bisphenol or other more recent cure systems. Nevertheless, some diamines are stiU used for food-contact appHcations of fluorocarbon mbbers and in zinc-free cures of halobutyl mbbers for pharmaceutical stoppers. Methylene dianiline and triethylene tetramine are cross-linking agents for ethylene—acryflc elastomers. 

Modification of urea resins with certain organic bases, e.g. triethylene-tetramine, will give resins with basic groups which form ionisable salts in the presence of acids ... 

Applications with real composites have been performed in order to verify the results so far outlined. Namely, a metalfilled epoxy composite was selected, whose matrix material was a diglycidyl ether of bisphenol-A resin, cured with 8 percent by weight of the resin, triethylene-tetramine. 

The products of the chemical degradation of PETP with triethylene tetramine and triethaneolamine can be used as epoxy resin hardeners, it is demonstrated. Products of PETP aminolysis with triethylene tetramine and aminoglycolysis with triethanolamine, were characterised using NMR and rheometric measurements. Characteristics of the crosslinking process for the system epoxy resin/ PETP/amine degradation product, and epoxy resin/TETA for comparison were investigated by DSC. Three classes of liquid epoxy resins based on bisphenol A, bisphenol F and epoxy novolak resins were used in the experiments. 16 refs. 

Treatment. Since the 1950s, the treatment of Wilson s disease has relied on chelating agents [25]. Early attempts to use BAL or EDTA for this purpose were unsuccessful, but penicillamine, triethylene tetramine dihydrochloride (trientine), and tetrathiomolybdate, all in combination with a low-copper diet, have proved to be effective, and result in the urinary excretion of large amounts of copper. The use of penicillamine is complicated by the fact that it may induce a transient worsening of neurologic function due to rapid mobilization of copper, and also has other side-effects, such as the development of nephrosis. Tetrathiomolybdate is an effective alternative with fewer side-effects [26]. In cases in which the dose was rapidly escalated, however, bone marrow suppression or liver function abnormalities have been described. 

DIISOPROPYLAMINE DI-n-PROPYLAMINE n-HEXYLAMINE TRIETHYLAMINE 6-AMINOHEXANOL DIISOPROPANOLAMINE TRIETHANOLAMINE N-AMINOETHYL PIPERAZINE TRIETHYL PHOSPHATE HEXAMETHYLENEDIAMINE HEXAMETHYL PHOSPHORAHIDE TRIETHYLENE TETRAMINE HEXAMETHYLDISILOXANE... 

In mole fraction at 4.5 °C 0.605 in triethylenetetramine, 0.588 in triactyl trimethyl triethylene tetramine, 0.578 in hexamethylenediamine, 0.369 in A,A-dimethylacetamide, 0.297 in A-methyl-acetamide, 0.109 in adiponitrile, 0.114 in sebaconitrile, 0.188 in ethylene glycol, 0.390 in triethyl phosphate (Copley et al, 1941). Miscible in many alcohols including ethanol, propanol, butanol, and pentanol. 

Yamani and Young (5) applied the theory to explain the plastic deformation of a diglycidyl ether of bisphenol A (DGEBA) epoxy resin cured with various amount of triethylene tetramine (TETA). They found that the theory gave a reasonable description for the resins below the glass transition temperatures T. ... 

Shell Epon 828 epoxy resin was cured with 13 PHR (parts per hundred of epoxy) of triethylene tetramine as a typical polyamine, 65 PHR of Shell Epon V-15 polyamide as a typical polyamide, or 130 PHR of dodecenyl succinic anhydride as a typical anhydride. Liquid formulations were cast in 5iluminum molds and oven-cured as follows ... 

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

Toxicology. Triethylene tetramine (TETA) is a strong irritant of the eyes, mucous membranes, and skin and is a sensitizer of the respiratory tract and skin. 

The ACGIH has not established a threshold limit value (TLV) for triethylene tetramine. 

Fawcett IW, Taylor AJN, Pepys J Asthma due to inhaled chemical agents—Epoxy resin systems containing phthalic acid anhydride, trimellitic acid anhydride and triethylene tetramine. Clin Allergy 7 1-14, 1977... 

Tanaka H, Inomata K, Arima M Teratogenic effects of triethylene tetramine dihydrochloride on the mouse brain. J Nutr Sci Vitamin 39 177-188, 1993... 

Diethylene triamine, DETA, i = 1 triethylene tetramine, TETA, i tetraethylene pentamine, TEPA, i = 3... 

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