Octyl isocyanate

Both alkyl and aryl isocyanates are found to trimerize upon heating or in the presence of catalysts to 1,3,5-trisubstituted hexahydro-x-tdazinetriones (18) (isocyanurates) (57). Only highly substituted isocyanates, such as tert-butyl isocyanate [7188-38-7] and tert-octyl isocyanate, fail to trimerize under these... 

Reaction of diethyl N-dimethylaminophosphoramidate with t-butyl- or t-octyl isocyanate affords the corresponding carbodiimides 4 in 60 % yield. ... 

Aliphatic isocyanates are generally much less reactive than phenyl isocyanate. The work of O Brien and Pagano [125] showed an activation energy of 16 kcal mole" for the reaction between tert-octyl isocyanate and ethanol at 25—40°C, and 22 kcal mole for reaction with 2-butanol. These relatively high activation energies are apparently typical for aliphatic isocyanates. 

Isocyanate dichlorides are obtained from azides and dichlorocarbene. The reaction proceeds at 0°, thus intermediates of type 87 rather than nitrenes are probably involved. -Octyl isocyanate dichloride (88) was prepared by this method from -octyl azide in 89% yield... 

O Brien and Pagano 46) determined the rate constants for the metal-salt-catalyzed reactions of i-octyl isocyanate... 

Table III Production of Octyl Isocyanate Via Dehydration of Carbamates...

Preparation 8-1 A quaternary ammonium salt of hyaluronic acid is dissolved in dimethyl sulfoxide. Octyl isocyanate as reactant and di-w-butyl-tin dilaurate as the catalyst are added. The reaction is done at 65°C for 8 h. Afterwards, dibutylamine is added to stop the reaction. Eventually, the reaction mixture is dialyzed in saturated sodium chloride aqueous solution, purified, exchanged from the quaternary ammonium salt to a sodium salt, and finally freeze-dried. 

Second virial coefficient of poly(octyl isocyanate)... 

Even stiffer chains than aromatic polyamides were built into networks with flexible crosslinking residues. A specially synthesized polyisocyanate copolymer was prepared by Aharoni [278] containing 25% 1-decenyl- and 75% n-octyl-isocyanate residues. This LCP was then lightly crosslinked by heating in solution in the presence of a free radical initiator (AIBN) to produce a gelled insoluble network. A characteristic structure appears as ... 

Poly((octylimino)carbonyl], [Poly(octyl isocyanate)] OS, LS 825... 

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