Reference

Imidazolides and their use as curing agents for polyepoxides

Imidazolides and their use as curing agents for polyepoxides. Schmid, Rolf; Zondler, Helmut; Fischer, Michael; Stauffer, Werner (Ciba-Geigy A.-G. , Switz.). Eur. Pat. Appl. EP 124482 A2 7 Nov 1984, 13 pp. DESIGNATED STATES: R: CH, DE, FR, GB, IT, LI, NL, SE. (German). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C07D233-60; C08G059-18. APPLICATION: EP 84-810192 19 Apr 1984. PRIORITY: CH 83-2316 29 Apr 1983. DOCUMENT TYPE: Patent CA Section: 37 (Plastics Manufacture and Processing) N-Acylimidazoles, such as 1-(2,4,6-trimethylbenzoyl)-2-phenylimidazole (I) [93951-24-7], are useful as hardeners for polyepoxides. Polyepoxides, contg. the hardeners have a satisfactory shelf-life and hardened satisfactorily as moldings, thin films, etc. Thus, 2-phenylimidazole [670-96-2] and 2,4,6-trimethylbenzoyl chloride [938-18-1] were used to prep. I. A mixt. of 6 g I and 100 g epoxidized novolak (epoxide equiv. 175.5) was cured 2 h at 140° and 2 h at 180° to give a 4-mm thick molding with flexural strength (MPa) 92 initially, 103 after 30 days at 160° in air, and 69 after 30 days in water at 120° (water uptake = 2.2%).

Facile conversion of tetrahydropyranyl and silyl ethers into esters using acid chlorides and zinc chloride

Facile conversion of tetrahydropyranyl and silyl ethers into esters using acid chlorides and zinc chloride. Kim, Sunggak; Lee, Won Jae (Dep. Chem., Korea Adv. Inst. Sci. Technol., Seoul 131, S. Korea). Synth. Commun., 16(6), 659-65 (English) 1986. CODEN: SYNCAV. ISSN: 0039-7911. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Tetrahydropyranyl and silyl ethers were converted into the corresponding esters using acid chlorides and a catalytic amt. of ZnCl2 in MeCN. Thus, tetrahydropyranyl octyl ether in MeCN contg. ZnCl2 treated with AcCl gave 74% Me(CH2)7OAc.Except for chemicals metioned above, 70116-81-3 is also used. .