Synthesis and properties of multiacrylic resins from epoxy resins

Abstract

SYNOPSISThe action of methacrylic acid onto tetraglycidyl methylene dianiline, tetraglycidyl sulfone dianiline, triglycidyl triphenylmethane ( TACTIX) , and epoxy novolac resins was performed using different catalysts. In each case, a comparative study of these catalysts was investigated depending upon the polarity of the solvent and of the temperature. Chromium complexes are better in low polar solvents. The reactions were monitored by 'H-NMR, by epoxide titration, and by size exclusion chromatography (SEC) , and the reactivity of these resins could be compared. Finally, the study of these materials obtained after radical and photochemical cross-linking, especially by dynamic mechanical analysis (DMA) , shows that these materials exhibit high T l s (2OOOC for methacrylated TACTIX) compared to those of the corresponding multiepoxides cured by diamines. 0 1993 John Wiley & Sons, Inc.

New trends in vinyl ester resins

“…Synthesis of VERs is usually catalyzed by tertiary amines, phosphines, and alkalies or -onium salts (Jackson 1980, Rao et al 1986, Peter et al 1991, Boutevin et al 1993, Zaske 1998, Aggarwal et al 1999, Gawdzik and Matynia 2001, Pal et al 2003 in the temperature range of 80-110°C and taking reactants in stoichiometric ratio. Complete esterification of the epoxy resin in practice is difficult because of gelation of the product before an acid value below 10 is attained.…”

“…Therefore, an excess of epoxide resin is always employed in the esterification reactions (Sandner andSchreiber 1992, Wheelar 1955). The reaction is monitored by determining the acid value and by Fourier transform infra red spectroscopy (FTIR), proton nuclear magnetic resonance ( 1 H NMR), and Carbon-13 nuclear magnetic resonance spectroscopy ( 13 C NMR) performed on the samples withdrawn at regular intervals (Boutevin et al 1993, Aggarwal et al 1999, Gawdzik and Matynia 2001, Malik et al 2001.…”

Synthesis of glycidyl amine adducts and their copolymerization with glycidyl methacrylate

“…2,3 The first concept of linear nitrogen-containing polymers obtained by the addition of diepoxides and amines having two active hydrogen atoms was outlined as early as 1934 by Schlack in the first patent of epoxy resins chemistry. 4 Boutevin et al 5 published the synthesis of multiacrylic resins from epoxy resins containing nitrogen atoms. These resins possess some advantageous characteristics including excellent reactivity.…”

Synthesis and characterization of the epoxyfumarate resins

“…Epoxyfumarates have an epoxy backbone structure with terminal unsaturated groups that can be cured by copolymerization with vinyl monomers, in analogy with the unsaturated polyesters. 2,3 The presence of fumarate (trans) unsaturation sites plays an imporatnt role in determining the physical and chemical properties of the final product because of a higher reactivity of trans-isomer in copolymerization with vinyl monomers. 4 -6 Compared with unsaturated polyester resins epoxyfumarates have some advantageous characteristics including excellent reactivity and good chemical and thermal resistances.…”

“…An interesting result of these studies is epoxyfumarates, the resins that share advantages of unsaturated polyesters and epoxy resins. [2][3][4][5] These are formed by the addition of acrylic or methacrylic acids or acidic esters of maleic or fumaric acids to epoxy resins. Epoxyfumarates have an epoxy backbone structure with terminal unsaturated groups that can be cured by copolymerization with vinyl monomers, in analogy with the unsaturated polyesters.…”