Detail of "670-96-2"

CAS Number:
670-96-2
Name:
2-Phenylimidazole
Molecular Structure:
Formula:
C₉H₈N₂
Molecular Weight:
144.18
Deleted CAS:
78232-99-2
Synonyms:
2-phenylimidazole isocyanuric acid adduct;1H-Imidazole, 2-phenyl-;Imidazole, 2-phenyl-;Curezol 2PZ;2-Phenyl-1H-imidazole;
EINECS:
211-581-7
Density:
1.141 g/cm³
Melting Point:
142-148 °C(lit.)
Boiling Point:
340 °C at 760 mmHg
Flash Point:
180.4 °C
Appearance:
colorless to beige chunks or granular powder
Hazard Symbols:
Xi, Xn
Risk Codes:
36/37/38-21/22
Safety:
26-36-36/37 Details

Ring closure of polyamic acids: Ring closure of polyamic acids. (Mitsubishi Chemical Industries Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59223726 A2 15 Dec 1984 Showa, 7 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: C08G073-10. APPLICATION: JP 83-98533 2 Jun 1983. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Org. solns. of polyamic acids obtained by reacting diamine and tetracarboxylic acid dianhydride are heated at ￡170°, in the presence of carboxylic acid monoanhydride and (benz)imidazoles or 2-phenylimidazoles optionally contg. alkyl, aryl, cycloalkyl, or aralkyl groups (31 H in cycloalkyl and aralkyl may be substituted with halogen or alkoxy) (the phenylimidazole may optionally have in the 1-position a halo-, cyano-, nitro- or acetylalkyl or Ph group) to give polyimides. Thus, pyromellitic dianhydride 77.5853, 4,4'-diaminodiphenyl ether 35.4185, and 3,3'-dimethylbenzidine 37.5337 g in 1435 mL DMF were heated to prep. a polyamic acid [88795-07-7] soln. (concn. 10%), 20 g of which was mixed with 0.4083 g 2-phenylimidazole [670-96-2] in 11.6 mL DMF and 1.9283 g Ac2O [108-24-7], cast to form a film, and heated 10 min at 120°. The obtained semi-dried film was fixed in a metal frame and heated 12 min at 200° and 4 min at 350° to form a 10-m film having imidation degree 55%.

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%).