Reference

Kinetics of the ring-opening polymerization of cyclopentene

Kinetics of the ring-opening polymerization of cyclopentene. Ceausescu, E.; Cornilescu, A.; Dimonie, M.; Nicolescu, E.; Popescu, M.; Coca, S. (Sci.-Res. Inst. Chem., Bucharest, Rom.). Acta Polym., 34(11-12), 696-701 (Russian) 1983. CODEN: ACPODY. 25103-85-9 and 142-29-0 which are cas registry numbers of chemicals are mentioned. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 36 Polymn. of cyclopentene [142-29-0] in the presence of catalysts WCl6-Et2AlCl [96-10-6]-epichlorohydrin (I) [106-89-8] or WCl6-iso-Bu3Al [100-99-2]-I took place without an induction period and had bimol. chain termination, but it gave polypentenamers [28730-07-6] differing in microstructure and some other properties depending on the nature of the Al compd. in the catalysts. These differences were ascribed to different concn. of active centers formed in both cases, and to side reactions accompanying the polymn. .

Glycidyl ethers of monohydric or polyhydric phenols

Glycidyl ethers of monohydric or polyhydric phenols. Ito, Iko; Toyoshima, Yoshiki; Takagishi, Hisao; Takahashi, Tsutomu (Sumitomo Chemical Co., Ltd. , Japan). Ger. Offen. DE 3315365 A1 3 Nov 1983, 19 pp. (German). (Germany).There are some reagents with their cas registry numbers 9003-35-4 and 56-37-1 are used in this study. CODEN: GWXXBX. CLASS: IC: C07D301-26; C07D303-22; C07D303-27. APPLICATION: DE 83-3315365 28 Apr 1983. PRIORITY: JP 82-71838 28 Apr 1982; JP 82-71839 28 Apr 1982. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 27 The title ethers, useful as sealants for integrated circuits, are prepd. with low hydrolyzable Cl contents by condensing mono- or polyhydric phenols with epichlorohydrin (I) [106-89-8] in the presence of alkali metal hydroxides in ethers. Thus, refluxing 110 g (0.917 equiv. OH) o-cresol novolak and 594 g I in 237 g dioxane with azeotropic distn. of H2O while adding 76.4 g 48% NaOH over 5 h gave a product with epoxy equiv. 203 and hydrolyzable Cl content 390 ppm, compared with 198 and 650, resp., for a reaction without dioxane. .