Tetraglycidyl-4-4"-diaminodiphenylmethane

Figure 1. Curing of tetraglycidyl diaminodiphenylmethane with thermally latent catalysts and 4,4 -diaminodiphenyl sulfone.

Fig. 1. Structures of commercial epoxy resins (a) phenolic novolac epoxy resin, (b) glycidated polybasic acid, (c) glycidated polyamine (A,A,A, A -tetraglycidyl-4,4 -diaminodiphenylmethane [28768-32-3] (TGMDA)), and (d) glycidated bisphenol A.

Diaminodiphenyl sulfone (DDS) cured tetraglycidyl-4,4 -diaminodiphenylmethane (TGDDM) epoxies are the mpst common composite matrices utilized in high performance fibrous composites prepared from prepregs. The structures of the unreacted TGDDM epoxide and DDS monomers are illustrated in Fig. 3. The TGDDM epoxide monomer is a liquid at 23 °C, whereas the DDS monomer is a crystalline... 

Figure 12.5 shows an example of the cured structure of a thermoset resin using two different epoxide monomers with two different amine hardeners. The epoxies are triglycidyl p-aminophenol (TGAP) and tetraglycidyl 4,4-diaminodiphenylmethane (TGDDM), which are tri- and tetra-fiinctional, respectively (n = 3 and n = 4, respectively) and the two hardeners are 4,4-diamino-diphenylsulphone (DDS) and dicyandiamide (DICY). 

Materials. The diglycidyl ether of bisphenol F (DGEBF), and N,N,N ,N -tetraglycidyl-4,4 -diaminodiphenylmethane (TGDDM), were received from Ciba Geigy. 4,4-diaminodiphenylmethane (DDM), was obtained fi om Aldrich. 4,4 -diaminodiphenylsulphone (DDS), was provided from Sigma Chemical. All chemicals were used without further purification. The monomers are presented in Figure 1. 

Reaction mechanism and network build-up for curing of N,N-diglycidyl-aniline (DGAT and N,N,N N -tetraglycidyl-4,4 -diaminodiphenylmethane "(TGDDM) The main features of the reaction of N,N-diglycidylamine deriva-tives with amines are [10] ... 

Reyx, D. and Costes, B., Homopolymerisation of tetraglycidyl-4,4 diaminodiphenylmethane (TGDDM). Identification of cyclic reaction products. Polymer Commun., in press. 

Others include brominated bisphenol A resins which impart fire resistance, epoxy phenol novolac (EPN) resins, bisphenol F epoxy (DGEBF) resins, epoxy cresol novolac (ECN) resins, cycloaliphatic epoxy resins, and tetraglycidyl-4,4 -diaminodiphenylmethane (TGDDM). 

Epoxy resins derived from multifunctional aromatic glycidyl amine resins such as triglycidyl-p-aminophenol and tetraglycidyl-4,4 -diaminodiphenylmethane have excellent properties at elevated temperatures ... 

Various epoxy resins obtained by glycidylation of amines with epichlorhy-drin are available. Two examples are iV, iV, N, N -tetraglycidyl-4,4 -diaminodiphenylmethane (XXX) prepared from 4,4 -diaminodiphenylmeth-ane and triglycidyl isocyanurate (XXXI) prepared from cyanuric acid. These multifunctional epoxy resins give highly cross-linked structures which have enhanced heat resistance and chemical resistance. 

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