Reference

Curing of epoxy resins with 1-[di(2-chloroethoxyphosphinyl)methyl]-2,4- and -2,6-diaminobenzene

Curing of epoxy resins with 1-[di(2-chloroethoxyphosphinyl)methyl]-2,4- and -2,6-diaminobenzene. Mikroyannidis, John A.; Kourtides, Demetrius A. (Ames Res. Cent., NASA, Moffett Field, CA 94035, USA). J. Appl. Polym. Sci., 29(1), 197-209 (English) 1984. CODEN: JAPNAB. ISSN: 0021-8995. DOCUMENT TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing) Fire-resistant compns. were prepd. using m-(H2N)2C6H3CH2PO(OCH2CH2Cl)2 (I) [89163-36-0] as a curing agent for epoxy resins, e.g. 31305-94-9 and 80-08-0 which are cas registry numbers are also used here. Epon 828 [25068-38-6], XD 7342 [66072-39-7], and MY 720 [31305-94-9]. The curing of these these resins by conventional agents, e.g. m-phenylenediamine (II) [108-45-2] or 4,4'-sulfonyldianiline (III) [80-08-0] is compared with that by I. The reactivity of the curing agents was shown by DSC to be in the order II > I > III. The lower reactivity of I resulted from electronic effects. The heat of polymn. increases with increasing epoxy functionality. Resins cured with I had lower decompn. temps. and higher char yields. The thermal properties of cured resins depended on reactant ratio. I-cured polymers, esp. polyfunctional resins, had significantly higher fire resistance (limiting O index). .

Durable cast epoxy tooling composition

Durable cast epoxy tooling composition. Dearlove, Thomas J.; Gray, Richard K.; Atkins, Richard P. (General Motors Corp., USA). U.S. US 4423094 A 27 Dec 1983, 5 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: B05D003-02. NCL: 427386000. APPLICATION: US 82-440976 12 Nov 1982. DOCUMENT TYPE: Patent CA Section: 42 (Coatings, Inks, and Related Products) Coating compns. having good wear resistance for metal stamping machine tools comprise an epoxy novolak resin contg. abrasive filler, an aliph. amine curing agent, and an imidazole deriv. high-temp. curing agent. The compns. may also be used to cast an entire tool. Thus, Epi-Rez SU 2.5 [89191-26-4] epoxy novolak 100, Epi-Rez 5048 [78040-92-3] 25, SiC (320 mesh) 188, Versamid 140 [12624-35-0] and curing agent Z (a eutectic mixt. of methylenedianiline [101-77-9] and m-phenylenediamine [108-45-2]) 6.25 parts were mixed. The high-temp. curing catalyst was 5 parts 2-ethyl-4-methylimidazole [931-36-2]. The cured compn.Except for chemicals metioned above, 42765-17-3 and 12624-35-0 are also used. had a compressive strength so high it could not be crushed in the test device. .