Isocyanate solution

ISOCYANATES, solutions, n.o.s., flash point greater than 23C 2206 ... 

Alcohols Apply sample solution, then nitrophenyl isocyanate solution (10% in benzene) Dry after reacting and develop [72]... 

Isocyanates, n.o.s. or Isocyanate Solutions, n.o.s. (Flashpoint less than 23 degrees C) 2478... 

SYNS ISOCYANATE de METHYLE (FRENCH) ISO-CYANATOMETHANE ISOCYANIC ACID, METHYL ESTER METHYLISOCYANAAT pUTCH) METHYI, ISOCYANAT (GERMAN) METHYL ISOCYANATE, solutions pOT) METIL ISOCIANATO (ITALIAN) MIC RCRA WASTE NUMBER P064 TL 1450... 

Fig 22. (nj/lnl vs. M plot for of poly(alkyl isocyanate) solutions. 1 Poiy(butyl isocyanate) in tetrachloromethane ) 2 poly (chlorohexyl isocyanate) in tetrachloromethane ... 

Polymerization of V at its melting point (about 75°C) was too rapid to permit adding and mixing of the catalyst. Addition of a reactive monofunctional liquid diluent such as perfluorobutylphenyl isocyanate allowed the resulting isocyanate solution to be cooled to 40°C the catalyst was then added and mixed before appreciable polymeriza-... 

Kinetic Experiments. Stock solutions were prepared by weighing out the correct amount of material and diluting to the proper level, using volumetric flasks. Reaction mixtures were prepared by adding the desired amount of catalyst and active hydrogen compound to a volumetric flask, diluting with solvent short of the calibration mark, and adding the proper amount of phenyl isocyanate solution and then solvent to the mark. 

The isocyanate solution (50 ml, 1.0N, DMF) was transferred into the thermostated three-necked flask and stirred magnetically under dry nitrogen. Then 50 ml of a catalyst in DMF was placed into the dropping funnel which was heated by means of an electric jacket. When the constant temperature was reached in both the flask and the funnel, the catalyst solution was poured into the flask and the whole mixture was thoroughly mixed. At various time intervals samples were taken and analyzed by the dibutylamine method (12). 

Isocyanates, n.o.s. or Isocyanate Solution, n.o.s. These include a number of chemical products used in the manufacture of plastic foams, synthetic rubber, etc. Some are sufficiently toxic or lachrymatory to need classification as toxic substances, particularly isocyanates in pure form. Others may need to be classified as flammable liquids, depending on their characteristics, and a number may not be subject to these Instructions. ICAO A2... 

Ohshima, A., Kudo, H., Sato, T, and Teramoto, A., Entanglement effects in semiflexible polymer solutions 1. Zero-shear viscosity of poly(n-hexyl isocyanate) solutions. Macromolecules, 28, 6095-6099 (1995). 

While solvent pre-treatment with an isocyanate solution has been used, more commonly, aqueous systems have been developed for the first stage of a two dip system, using standard RFL systems for the second stage. 

Infectious Substances. atTecting 2900 24 Isocyanate Solution, flammable. 2478 28... 

Int ectious Substances, affecting 2814 24 Isocyanate Solution, toxic, n.o.s. 2206 55... 

Adjust the temperature of the 1 cm flask of 1 M phenyl isocyanate solution by immersing it in a water bath at 25 1 C with dry toluene (less than 15 ppm water) and thoroughly mix the contents of the 250 cm flask. 

Pippette 25 cm 0.2 M di-n-butylamine solution into two dry stoppered 250 cm conical flasks (i.e., a sample and a blank flask). Allow a 15 s pipette draining time during these operations. Into one of the flasks pipette 25 cm of the ten-fold diluted phenyl isocyanate solution (sampled at 25 °C using a 15 s draining time) and into the blank flask pipette 25 cm of toluene. Leave both solutions for 15 minutes to react, then add to each 100 cm methanol and 5 drops bromophenol blue indicator. Using 0.1 M hydrochloric acid titrate the sample (Tj ml of normal hydrochloric acid) and the blank solutions (Tg ml of normal hydrochloric acid) to the yellow-green end point. 

The normality (F) of the 1 cm undiluted stock phenol isocyanate solution of 25 1 °C is then given by ... 

The molarity of the phenyl isocyanate solution at 25 1 "C, prepared as described previously, should be slightly greater than 1000 M. Finally, adjust the strength of the 1 cm of stock phenyl isocyanate solution to within the range 1.000 0.005 M by addition of a calculated volume of dry toluene. Mix the 1 cm stock solution well in the thermostatted 25 1 °C water bath and recheck the normality of a ten-fold dilution as described previously. 

Place the two 1 litre reagent flasks containing the stocks of 1.000 0.005 M phenyl isocyanate solution and of 0.56% w/v Dabco catalyst solution in a separate water bath thermostatted at 25 1 °C, and allow these flasks to reach this temperature over a period of 30 minutes. 

The molarity of the phenyl isocyanate solution at 25 + 1 C, prepared as described above, should be slightly greater than l.OOOM. Finally, adjust the strength of the 1 cm of... 

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