Trimethylolpropane triacrylate, chemical

Trimethylolpropane triacrylate (TrMPTrA, mw 296.3, Polysciences Inc., Warrington, PA) was mixed with 1 wt% 2,2-dimethoxy-2-phenyl-acetophenone (DMPA, mw 256.3, Aldrich Chemical Co., Milwaukee, WI) as a photoinitiator. For... 

All the formulations used in our experiments utilized a diacrylated Bisphenol A epoxy, Novacure 3700 (Interez, Inc.), as the base resin. Four multifunctional acrylates were used to modify cure behavior and physical properties. They were< trimethylolpropane triacrylate (TMPTA), polybutanediol diacrylate (PBDDA), pentaerythritol triacrylate (FETA) and dipentaerythritol triacrylate (DPBPA). The base resin, TMPTA and PETA were supplied by Interez, Inc. PBDDA was obtained from Alcolac Chemical. DPEPA was supplied by Sartomer. All were commercial grades, and were used without further purification. The photoinitiator used for all experiments was Darocur 1664 (EM Industries), a mixture of aromatic Icetones whose absorption s ctrum is shown in Figure 2. It was chosen because it is well-matched to the emission spectrum of the Fusion "V" lamp which was used as the source of irradiation. The formulations used are summarized in Table I. 

Materials. Samples of three multifunctional monomers namely glycerol propoxylate triacrylate (GPTA), trimethylolpropane ethoxylate triacrylate (TMPETA) and trimethylolpropane triacrylate (TMPTA) were supplied by Harcros Chemicals Limited, Manchester, UK. Benzophenone was obtained from the Union Carbide Company, USA and used as supplied. Dimethylamine, morpholine, diethylamine, dicyclohexylamine, di-n-butylamine and diethanolamine were obtained from the Aldrich Company, UK and used as supplied. N-methylethanolamine, N-ethylethanolamine and N-methylethylamine were all obtained from Fluka Chemicals, UK and used as supplied. Carbon tetrachloride (Analar grade) was obtained from Fisons Limited, UK. 

Trimethylolpropane triacrylate 2-Ethylhexyl Acrylate Vicure 10 (benzoin ether - Stauffer Chemical)... 

Cure enhancers for UV/EB and peroxide-cure systems are low-volatility liquid monomer SR-502 ethoxylated trimethylolpropane triacylate, curing rapidly in systems to increase flexibility, weather resistance, chemical resistance, shrinkage, abrasion resistance, and impact strength, for coatings, PVC flooring, and photopolymers and CD-501 propoxylated trimethylolpropane triacrylate, for low shrinkage in acrylics, adhesives, coatings, electronics, and photopolymers. 

---