Detail of "2155-74-0"

Reference

Stable condensation products using a Lewis acid catalyst

Stable condensation products using a Lewis acid catalyst. Walsh, Edward N.; Jaffe, Fred; Honig, Milton L.; Shim, Kyung S.; Brokke, Mervin E. (Stauffer Chemical Co., USA). U.S. US 4012463 15 Mar 1977, 5 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: C07F009-08. NCL: 260928000. APPLICATION: US 74-473471 18 May 1974. DOCUMENT TYPE: Patent CA Section: 36 (Plastics Manufacture and Processing) Tris(2-chloroethyl) phosphate (I) [115-96-8], which had been heated at 180. 301-10-0 and 75-21-8 which are cas registry numbers are also used here.degree. in the presence of 0.2% Na2CO3 to distill ethylene dichloride, was neutralized with ethylene oxide [75-21-8] for 6 h at 80.degree. in the presence of stannous octoate (II) [301-10-0]. The treated I was used to catalyze the manuf. of a polyurethane foam having acid no. 0.3 and good green strength, compared to acid no. 21.8 and a foam that was too acidic to test for green strength for a polyurethane prepd. using I obtained without the II. Tributyl antimonite [2155-74-0] and the cation exchange resin Ionac c 242 [58799-23-8] were also used as catalyst, which lowered the temp. of the neutralization reaction and avoided side reactions. .

Poly(ethylene terephthalate) with good brightness

Poly(ethylene terephthalate) with good brightness. Takashima, Shunichi; Kawashima, Masao; Ishii, Kimiyoshi (Mitsubishi Rayon Co., Ltd., Japan). Japan. Kokai JP 52129798 31 Oct 1977 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C08G063-22. APPLICATION: JP 76-47443 26 Apr 1976. DOCUMENT TYPE: Patent CA Section: 35 (Synthetic High Polymers) A mixt. of terephthalic acid (I) and 105-180 mol % (based on I) ethylene glycol (II) is charged to a first reactor, heated at 230-70° and 0-7 kg/cm2 gage in the presence of Ti, Mg, or Co compds. to reach 80-94 % esterification (based on CO2H), transferred to a second reactor, heated at 250-80° and 3200 mm to reach >95% esterification, transferred to a polymn.Some commonly used reagents like 25038-59-9 is used in this experiment. reactor contg. Sb alkoxide and(or) Ge alkoxide, and polymd. to give a copolymer (III) [25038-59-9] having good brightness. Thus, a 1:1.3 (molar) mixt. of I and II contg. 0.1 wt.% (BuO)4Ti was continuously charged to the first reactor at 255° and 2.3 kg/cm2 gage, transferred after 108 min of residence time to the second reactor at 265°, and discharged after 90 min of residence time to give flakes (96.7% conversion) contg. 0.76 wt.% diethylene glycol (IV). A mixt. of 10 kg of the flakes, 0.1 wt. % (BuO)3Sb [2155-74-0] and 0.02 wt.% (BuO)4Ge [25063-27-8] was heated, evacuated, and kept 2 h 10 min at 285° and 1 mm to give III having intrinsic viscosity (25°, 1:1 PhOH-C2H2Cl4) 0.76, IV content 0.86%, and color Y value 94.4, compared with 0.76, 0.95, and 88.4, resp., for a similarly prepd. III without (BuO)3Sb and (BuO)4Ge (polymn. time at 285° and 1 mm 3 h 15 min). .