Detail of "925-21-3"

Reference

Effect of solvent in the kinetics of plasticizing monoester formation

Effect of solvent in the kinetics of plasticizing monoester formation. Monomaleates of n-butyl, sec-butyl and tert-butyl alcohol. Merca, E.; Poraicu, M.; Davidescu, C.; Tribunescu, P. (Rom.). Bul. Stiint. Teh. Inst. Politeh. "Traian Vuia" Timisoara, Ser. Chim., 29(1-2), 47-52 (English) 1984. CODEN: BTICBN. ISSN: 0378-9675. DOCUMENT TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 23 Rate consts., heat of esterification, activation energies, and activation entropies in prepn. of mono-Bu maleate [925-21-3], monoiso-Bu maleate [925-05-3] and mono-tert-Bu maleate [45022-27-3] by esterification of maleic anhydride (I) with BuOH, sec-BuOH, and tert-BuOH at 25-70° in CHCl3 [67-66-3], dioxane [123-91-1] and Me2CO [67-64-1] depended significantly on the type of the solvent and on the chem. structure of the alc. The reaction rate consts. (k) with respect to the type of alc. (in CHCl3) and with respect to the solvent decreased in the order: kBuOH > kisoBuOH > ktert-BuOH and kCHCl3 > kdioxane > kMe2CO. The activation energy (E) of the reaction decreased in the order ECHCl3 > Edioxane > EMe2CO. Hence, the k values are not detd. by E but by the activation entropy (DS). The relations between k, DS, soly of I in the solvents used, and chem. structure of the alcs. are discussed.

Air-drying binder emulsions

Air-drying binder emulsions. Zueckert, Bertram; Aigner, Hansjoerg (Vianova Kunstharz A.-G., Austria). Austrian AT 372967 B 12 Dec 1983, 15 pp. (German). (Austria). CODEN: AUXXAK. CLASS: IC: C09D003-48. APPLICATION: AT 82-1706 3 May 1982. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) The title emulsions are prepd. from 25-50% graft polymers [acid and OH no. 25-70 and ￡40 mg KOH/g, limiting viscosity no. (LVN, CHCl3, 20°) 9-15 mL/g] prepd. from polyethylene glycol (I) polyesters with fatty acids (av. I no. 3140) 50-75, nonfunctional vinyl compds. 17-45, and 2-alkenoic acids 5-8%, and 75-50% tertiary amine-contg., air-drying polyurethane or urethane alkyd (amine no. 5-15, LVN 8-16 mL/g). Thus, an emulsion from a graft polymer [OH no. <5, acid no. 38, LVN 10.3 mL/g; prepd. from :56 I (mol. wt. 1500)-linseed oil-dehydrated castor oil fatty acid polyester 70, vinyltoluene 15, iso-Bu methacrylate 9, acrylic acid 4, and mono-iso-Pr maleate 2 parts] 46, urethane alkyd (amine no. 6.1, LVN 13.1 mL/g, prepd. from safflower oil 300, dehydrated castor oil 120, pentaerythritol 86, trimethylolpropane 9, BzOH 8, phthalic anhydride 90, and TDI 82 parts) 66, BuOCH2CH2OH 3, Et3N 1.44, Me2NCH2CH2OH 0.64, and H2O 105 parts (pH 9.6, viscosity 3.Except for chemicals metioned above, 141-32-2 and 925-21-3 are also used.2 Pa-s) had drying time 6 h and 60° gloss 78. .