Triallyl cyan urate

Crosslinking of PVC is known to occur on irradiation, with a low yield [Ohnishi et al., 1962]. More efficient crosslinking may be induced by irradiating PVC in the presence of multifunctional crosslinking agents [Salovey, 1973]. For example, plasticized PVC has been used as a wire and cable insulation. To enhance the crosslinking of PVC during electron irradiation, triallyl cyan-urate (TAC), trimethylolpropane trimethacrylate (TMPTMA), or trimethylolpropane triacrylate (TMPTA) have been used as the additives [Bradley, 1984]. 

The condensation of an alcohol with an acid to give an ester with water as a by-product is a classical way to make polymers (Table 17.1,1). In alkyd resin cooking (Section 13.4), it was mentioned that additional reactions are those between anhydride and alcohol or epoxide and between free acid and alcohol and esters (transesterification). The simple polyester with its repeating dyadic structure can be dissolved in styrene (about 70 parts polyester to 30 parts styrene) and polymerized at room temperature by a free-radical route using a redox couple. (Methyl ethyl ketone peroxide plus cobalt naphthenate would be typical.) Glass-reinforced boat hulls and automobile bodies are made from such systems. In some cases, monomers more expensive than styrene can be justified. Methyl methacrylate, triallyl cyan-urate, and diallyl phthalate have been suggested by various sources. Flammability... 

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See also in sourсe #XX -- [ ]

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