Polyamine adduct

Dezincing, lead refining by, 14 754-755 DGEBA-aromatic polyamine adduct system, 10 416, 417. See also Diglycidyl ether of bisphenol A (DGEBA)... 

Properties Short-chain aliphatic poly amine Oxyalkylated short-chain poly amine Long-chain polyamine adduct Aromatic poly amine adduct Polyamide... 

Polyamine-adduct-cured coal tar 71 125-500 4 h 6h Two components, high build, cures down to —5°C when substrate ice-free... 

Polyamines. Aliphatic polyamines cure epoxy resins via their epoxy groups at ambient temperature. Excess amine is generally prereacted with the epoxy resin to form a polyamine adduct. Amines react with monomeric or dimeric fatty acids to form polyamidoamines. Polyamine-adduct-cured epoxy resins have a high chemical resistance. Polyamidoamine-cured epoxy resins exhibit good adhesion and flexibility. 

Chem. Descrip. Aliphatic polyamine adduct (80%) in water Uses Hardener for solid epoxy resin disps. or emulsified liq. resins for use in water-reducible coatings on metallic substrates, corrosion-protection primers (in combination with Beckopox EH 386w)... 

Chem. Descrip. Polyamine adduct Uses Epoxy curing agent for coatings... 

Chem. Descrip. Aq. microgel disp. of polyamine adduct in water and ethylene glycol monopropyl ether... 

Nikolic, G. Zlatkovic, S. Cakic, M Cakic, S. Lacnjevac, C Rajic, Z. (2010). Fast Fourier Transform IR Characterization of Epoxy GY Systems Crosslinked with Aliphatic and Cydoahphatic EH Polyamine Adducts. Sensors, Vol.lO, No.l, 0anuary 2010), pp. 684-696, ISSN 1424-8220. 

Fig. 6. Chemical resistance of a DGEBA—aromatic polyamine adduct. Post-cured substrate sandblasted mild steel film thickness 300-350 /zm cure 7 d at 20°C. D Degraded resistant.

The hardeners for cold-setting systems include aliphatic and cycloaliphatic amines and polyamines, adducts of polyamines and epoxy resins, phenol-amine combinations, and condensates of polyamines and dimerized fatty acids (polyaminoamides). Whereas amine hardeners must be used in a stoichiometric ratio to the reactive epoxy groups, polyaminoamides may be overdosed to a certain extent and thus used to elasticize the adhesive resin. 

In order to address the issues of volatility and toxicity associated with low MW aliphatic amines, different chemical modifications are adopted to derive amine cross-linkers with higher MW and hence lower volatility. Some commercially important derivatives are polyamine adducts, amine terminated polyamides, amidoamines, Mannich bases, and phenalkamines. 

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