N-Butyl urethane

N-Butylurethane and derivs 2 B389 mononitrobutylurethane 2 B389 N-nitroso-N-(n-butyl)-urethane 2 B389... 

NHjCOOCHj) Ethyl carbamate (urethane) n-Propyl carbamate. n-Butyl carbamnte n-Amyl carbamate t o-Amyl carbamate. N-Methylurethane... 

Demand for n-butanol as n-butyl acetate accounts for about 13 percent of domestic consumption of the alcohol. This acetate ester is a general purpose coatings solvent with particular application in nitrocellulose lacquers and moisture cured urethane coatings formulations. n-Butyl acetate is the traditional medium boiling solvent for nitrocellulose lacquers and, as such, is the standard by which other solvents are compared. 

Primary alcohols when heated to 175 190° with urea give 43-60% yields of urethanes.Alcohols below n-butyl require pressure. The reaction probably goes through the intermediate cyanic acid obtained by decomposition of the urea. The reversible reaction HNCO + ROH NHjCOjR is well known, and urethanes are sometimes prepared by the exchange reaction of an alcohol and another urethane. ... 

Proteases, such as thermitase,papain,f " l and subtilisinf have been employed for the deprotection of tert-butyl and methyl esters from various glycopeptides. More interestingly, the C-terminus of a nucleopeptide methyl ester 8 was deprotected selectively and in very high yield by papain.l Neither the acetate, the N-terminal urethane, the allyl phosphate, nor the phenylacetamide protection of the nucleobase were attacked (Scheme 17). 

Baker and Gaunt found that the reaction between various alcohols and phenyl isocyanates in di-n-butyl ether and in benzene followed essentially second-order kinetics (first order with respect to the alcohol and to isocyanate concentration) as long as the reactants were in equimolar concentration. The second-order velocity constant calculated on the basis of such kinetics, however, increased with increasing (excess) alcohol concentration, indicating that the alcohol acted as its own catalyst. Baker and Gaunt postulated that the first step of the reaction was the formation of a complex (C) between the alcohol and the isocyanate and that in the second step this complex then reacted with a second molecule of alcohol to form the urethane and a free alcohol molecule according to... 

Chem. Descrip. 2,4-Bis (2,4-dimethylphenyl)-6-(2-hydroxy-4-isooctyloxyphenyl)-1,3,5-triazine (50%) in n-butyl acetate Uses UV absorber for high-solids coatings, waterborne coatings, coil coatings, pigmented base coats, clear coats at lower loadings, acrylic melamines, acrylic and polyester urethanes, silane-modified acrylics, epoxy acids... 

Poly(acrylate-ien-urethane-urea), 256-260 Poly (acrylic acid-ABc-vinyl alcohol), 264 Polyacrylonitrile, 3 Polybutadiene, 3, 273, 310 Poly(butadiene-co-methacrylic acid), 165 Poly(butadiene- -styrene), 79ff Poly(butadiene-ipn-styrene), 239ff Poly(n-butyl acrylate-ipn-methyl methacrylate), 267 Polycarbonate, 42... 

J.C. Wilson http //www.wilsonchemicals.com, J.T. Baker http //www.jtbaker.com, LIuch Essence http //www.iiuch-essence.com] Mallinckrodt Baker http //www.maiibaker.com] http //www.maiichem.com] Natural Advantage http //WWW. naturai-advantage. net Nipa Inc http //www.nipa.com] Nippon Syn. Chem. Ind. Oxford Chems. Ltd http //www.oxfordchemicais.com] Penta Mfg. http //www.pentamfg.com] Sigma Spectrum Quality Prods. http //www.spectrumchemicai.com] Springfield Scientific Supplies Sunnyside http //www.sunnysidecorp.com] VWR Int l. http //www.vwrsp.com] Vopak USA http //WWW. vopakusa. com Xinchem http //www.finechemnet.com Trade Name Synonyms Eastman n-Butyl Acetate, Urethane Grade [Eastman http //www.eastman.com]] Ucar Butyl Acetate t[Dow http //www.dow.com] s-Butyl acetate... 

Eastman n-Butanol. See Butyl alcohol Eastman n-Butyl Acetate, Urethane Grade. 

Eastman n-Butyl Acetate, Urethane Grade Ucar Butyl Acetate 123-91-1 1,4-Dioxane 123-92-2 Isoamyl acetate 123-93-3... 

Eastman n-Butyl Acetate, Urethane Grade Ucar Butyl Acetate 204-661-8 1,4-Dioxane 204-662-3 Isoamyl acetate 204-663-9 Thiodiqlycolic acid 204-664-4 Cithrol GMS 0400 Glyceryl stearate HallStar GS KESSCO GMS 63F 204-666-5 Ablumol BS ADK STAB LS-8 Butyl stearate Butyl Stearate C-895 Butyl Stearate L Crodamol BS Dermol EB Edenol BS Emerest 2321 Emerest 2325 Emerest 2326 Estol BUS 1550 Exceparl BS HallStar BST... 

Hybrid aqueous dispersions were prepared containing both acrylic resins and polyurethane to provide enhanced properties for coating applications. Nanosized (approximately 50 mn) hybrid latexes were prepared at 30 C by the redox-initiated miniemulsion polymerisation of n-butyl methacrylate monomer in the presence of a urethane prepolymer. A stabiliser, of low molecular weight and low water solubility, was required to obtain stable particles of the required size. 7 refs. 

Particular studies of the IR spectra of homopolymers include isotactic poly(l-pentane), poly(4-methyl-l-pentene), and atactic poly(4-methyl-pentene) [16], chlorinated polyethylene (PE) [17], aromatic polymers including styrene, terephthalic acid, isophthalic acid [18], polystyrene (PS) [19-21], trans 1,4-polybutadiene [22], polyether-carbonate-silica nanocomposites [23], polyhydroxyalkanoates [24], poly(4-vinyl-n-butyl) [25], polyacetylenes [26], polyester urethanes [27], miscellaneous... 

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