Detail of "923-26-2"

Reference

Photocurable acrylate polymer compositions for coatings

Photocurable acrylate polymer compositions for coatings. Yoshioka Yoshiaki; Yoshida, Haruo; Sakimoto, Seiichiro (Showa Denko K. K., Japan). Japan. Kokai JP 53029388 18 Mar 1978 Showa, 8 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08F020-10. APPLICATION: JP 76-103724 1 Sep 1976. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) A photocurable acrylate polymer coating compn. with improved flexibility and heat and weather resistance is prepd. from a half-ester of an unsatd. alicyclic polybasic acid or anhydride and a OH-contg. vinyl monomer, an aliph. polyol polyglycidyl ether contg. 33 epoxy groups, and a polybasic carboxylic acid or carboxy-terminated polyester. Thus, a mixt. of 2-hydroxyethyl acrylate [818-61-1] 929, methyltetrahydrophthalic anhydride [26590-20-5] 1328, and NaNO2 1.2 g was heated 3 h at 80-115° to give a half-ester [62073-18-1] with acid value 194. A mixt. of the half-ester 578, trimethylolpropane triglycidyl ether [3454-29-3] 450, and N,N-diethylcyclohexylamine (I) 1 g was heated 2.5 h at 100-25°, mixed with fumaric acid [110-17-8] 55.1, I 1, and NaNO2 0.4 g, and heated 3.5 h at 100-25°. A mixt. of the resulting polyfunctional monomer [67596-21-8] 60, 2-hydroxypropyl methacrylate [923-26-2] 40, 2-ethylanthraquinone 1, and benzoin iso-Pr ether 1 g was stirred to give a photocurable resin.

Impregnating resin and its use in insulating electrical windings

Impregnating resin and its use in insulating electrical windings. Kiessling, Gerhard; Pillath, Raimund; Kerber, Hermann (Herberts G.m.b.H., Fed. Rep. Ger.). Ger. DE 3325943 C1 21 Feb 1985, 8 pp. (German). (Germany). CODEN: GWXXAW. CLASS: ICM: C08L067-06. ICS: C08K005-10; H01B003-30; H02K003-30; H01F027-32. APPLICATION: DE 83-3325943 19 Jul 1983. DOCUMENT TYPE: Patent CA Section: 38 (Plastics Fabrication and Uses) Section cross-reference(s): 37, 76 Hexanediol diacrylate (I) [13048-33-4] and/or butanediol diacrylate [1070-70-8] is used, with hydroxypropyl methacrylate (II) [923-26-2], and/or butanediol monoacrylate [2478-10-6] in some cases, as a reactive diluent for unsatd. polyester resins used for the impregnation of elec. windings. The diluents have low volatility (in contrast to the usual styrene) and give impregnating compns. having low viscosity. Thus, an unsatd. polyester prepd. from castor oil 2325, maleic anhydride (III) 673, monoethanolamine 150, and tetrahydrophthalic anhydride 372 g was mixed with 2.30 g toluhydroquinone and 850 g I-II mixt., and this soln. (660 g) was mixed with 330 g soln. prepd. by adding 830 g I-II mixt. to an unsatd. polyester prepd. from neopentyl glycol 426, propylene glycol 90, isophthalic acid 424, and III 248 g. This mixt. (58% solids, viscosity 800 mPa.s) was used to impregnate elec. windings and hardened 3 h at 130° to give elec. insulation having good mech. and elec. properties.