Reference

Recent development work on aqueous powder coatings using transesterification for crosslinking

Recent development work on aqueous powder coatings using transesterification for crosslinking. De Vries, N.; Van Westrenen, W. J. (Koninklijke/Shell-Lab., Amsterdam 1003 AA, Neth.). Congr. FATIPEC, 17th(2), 165-93 (English) 1984. CODEN: FAPVAP. ISSN: 0430-2222. DOCUMENT TYPE: Journal CA Section: 42 (Coatings, Inks, and Related Products) Aq. powder coatings having good suspension stability are prepd. by forming an adduct of an epoxy resin with a mixt. of mono- and diethanolamine and crosslinking by transesterification with bis(2-hydroxyethyl) terephthalate [959-26-2] in the presence of a metal salt. The suspensions are chem. stable even after prolonged storage at 40°, phys. stable when stored at ￡30°, stable during transport, and readily sprayable with conventional equipment.

A simulation method for ethylene glycol terephthalate polycondensation process

A simulation method for ethylene glycol terephthalate polycondensation process. Yokoyama, Hiroshi; Sano, Tsuyoshi; Chijiiwa, Tsutomu; Kajiya, Ryuji (Hitachi Res. Lab., Hitachi, Ltd., Hitachi, Japan). Sekiyu Gakkai Shi, 21(4), 271-6 (English) 1978. CODEN: SKGSAE. ISSN: 0582-4664. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) The main reactions leading to formation of poly(ethylene terephthalate) (I) [25038-59-9] and the side reactions resulting in degrdn. of I were studied by simulating the continuous polycondensation in a batch reactor and in a continuous pilot plant. Bis(b-hydroxyethyl) terephthalate [959-26-2] was used as the starting material, and Sb2O3 and OP(OPh)3 were used as the catalyst and the stabilizer, resp. The no.-av. degrees of polymn. of the obtained I were in good agreement with the calcd. values. At viscosities 2000-3000 P the diffusion rate in the pilot plant reactor was ~20 times faster than in the batch reactor.