Reference

Reactivity of nitrodiols in urethane formation of 2-nitropropane-1,3-diols with methylene diphenyl diisocyanate

Reactivity of nitrodiols in urethane formation of 2-nitropropane-1,3-diols with methylene diphenyl diisocyanate.Some chemicals with cas registry numbers like 26447-40-5 and 1794-90-7 are also used. Abe, Stsuki; Namba, Keiho (Fac. Appl. Chem., Univ. Tokyo, Tokyo, Japan). Kogyo Kayaku, 35(1), 19-21 (Japanese) 1974. CODEN: KOKYBR. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Section cross-reference(s): 35 Kinetics of the title reaction, to give a urethane in dioxane were examd. NO2 groups adjacent to OH groups retarded the rate of the reaction due to the inductive effect of the NO2 group and the inter- and intramol. H bonding of the title diol. .

Molding sand composition

Molding sand composition. Yamamoto, Yasunobu; Mizutani, Iwao; Sato, Tadashi; Kubo, Yasunori (Aisin Kako Co., Ltd., Japan). Japan. JP 51020408 B4 24 Jun 1976 Showa, 5 pp. Division of Japan. 74 25,087. 121-44-8 and 26447-40-5 are cas registry numbers. These chemicals are also mentioned in this article. (Japanese). (Japan). CODEN: JAXXAD. CLASS: IC: B22C001-02. APPLICATION: JP 68-29473 1 May 1968. DOCUMENT TYPE: Patent CA Section: 55 (Ferrous Metals and Alloys) The molding sand compns. contain sand, org. binder, and adsorbent-contg. hardening agent for the binder, and optionally a hardening accelerator. As the hardening agent, amine compds. which produce active gases at room or higher temps. are used. The molding sand compns. have good formability, give sand molds with improved dimensional acuracy, and are easily disintegrated after use. Thus, SiO2 sand 100, alkyd resin (OH value 205) 2.0, 60-mesh zeolite contg. adsorbed 10% triethylamine [121-44-8] gas 1.2, and diphenylmethane diisocyanate [26447-40-5] 2.0 parts were mixed, charged into a master mold, and hardened by blowing CO2 into it. The sand mold had a compressive strength >20 kg/cm2 after 1 hr. .